Results for search term: 2
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DescriptionImages

NGC0271

NGC 271 is a somewhat distorted, face on spiral in Cetus. Its redshift distance is a bit over 170 million light-years. Tully-Fisher measurements (all from the same data) range from 191 to 220 million light-years depending on how you look at that data. The value with the smallest error bar says 191 million light-years while a median value is 218 million. Pick your candidate or roll your own.

Off the southeast edge of the galaxy is a puff of stars. The arm had pretty well faded out then returns in this puff or is it a separate object? NED offers no help here. I note the other arm on the other side also fades then reappears though looks again like the arm rather than a puff. Still, it is likely it is just part of the arm.

SAO 128981 is an 8th magnitude star that gives trouble here. Its glare overrides the galaxy. Could that create a false sense of the drop in the arm's intensity creating the appearance of a puff? I don't think so, the drop off was quite obvious even through the glare of the star. I find no amateur images of this one but the various POSS images and the Sloan image all are bothered by the star but also appear to show the puff as real.

This area of the sky hasn't been well studied for galaxies. I found only 3 others with redshift data. One, to the southwest, has a similar redshift and is likely a companion. The other two were about a billion light-years out. Out of frame at the top right is UGC 00505 also at about the same redshift as NGC 271. Some sources list these three as a triple. The odd shape of NGC 271 might be due to interaction with UGC 00505. For reasons I can't determine I managed to not get it in the frame. My notes say to catch it yet I didn't.

NGC 271 was discovered by William Herschel in 1785 and at magnitude 12.2 moderately bright in a 10" scope. Yet it isn't in either of the Herschel 400 observing program lists.

One of the galaxies with redshift, in the lower left, is a face on spiral with featureless arms at my resolution. It is a rare galaxy in that it is both a strong IR source and a Ultraviolet Excess source. Hence I included both its 2MASS and GALEX designations.

Preparing an annotated image, especially in poorly covered areas like this results in lots of issues. A SCT scope can create ghost images that look much like faint dwarf galaxies. These I usually process out. Since several have asked me recently about them I left in the one that is in this image. It's above the 2MASS/GALEX galaxy. In well-covered fields, they are easy to spot as they are not in the various catalogs. But in a region like this where most are unlisted things get more difficult. They are faint and thus their absence from the POSS plates may not mean they aren't real. I have to download the FITS and then stretch like crazy. I also get the Sloan image when available (often not the case in these regions) and do the same. In this case, the Sloan image is available. Neither it nor the POSS images show any sign of it so it is quite likely not real. But at the top center of my image is a similar faint smudge that is real and in this case listed in NED though that is rare in fields like this one. It is [dIM97] J005019.82-014447.4. It shows how similar a real low surface brightness galaxy is to a ghost image the SCT corrector can create having a flat surface ideal for reflections. The odd linear feature towards its southern edge is a pair of faint stars not part of that galaxy. NED had no redshift for it so that is shown by "na".

Another issue is shown by the galaxy to the lower left, MCG +00-03-016. NED has no distance for it yet labels it a dwarf. In other images, I've seen similar "dwarfs" with a redshift value of over a billion light-years. Now you can't be a dwarf when 100,000 light-years across that these have to be or at a very bright magnitude as others can be. Something is wrong in these cases. But when there's no distance data is it really a dwarf or just another that isn't what is claimed? This one sure does look like it could be a dwarf so I didn't add a question mark but still I can't be certain that's the case after all the obvious errors I've seen in other fields.

Why some galaxies don't make a catalog and others do always amazes me. APMUKS(BJ) B004829.03-021415.6 is a galaxy in the Automated Plate Measurement UK survey. Just to its north is a galaxy that for some reason wasn't seen by the survey. Seems automation misses the rather obvious sometimes. Another reason the various Galaxy Zoo projects are finding so much not found by the computers.

The annotated image is sparse as few galaxies in the image had redshift values. I've labeled others without redshift data when mentioned above. Hundreds of others missed their 15 minutes of fame it seems.

14" LX200R @ f/10, L=4x10' RGB=2x10', STL-11000XM, Paramount ME


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NGC0278

NGC 278 is a brilliant, face on, somewhat flocculent spiral in southern Cassiopeia about 6.5 degrees north of M31. That's about all I can find on it that astronomers agree upon. Distance estimates range from 14.8 to 38.5 million light-years. Some, including NED and the NGC project, classify it as a barred spiral SAB(rs)b. Yet others say it is just Sb adding: "Both optical and near-IR images indicate that this SAB galaxy is not actually barred." Others point to the spiral structure being traced to within 2" of the core which is either a point source or a 2" diffuse disk depending on which paper you read. There's little agreement on anything about this galaxy it seems. The spiral structure while of high surface brightness (unusually high in fact) has a very muted fuzzy look to it. I get the feeling I'm looking at it through a thick fog. The spiral structure is surrounded by a diffuse reddish disk. Or is it a sphere and this is what is creating the "foggy" look? Since there's a dark band separating the bright inner spiral structure from the outer red diffuse area and the features of the is dark band extend into the red, featureless area I'm not sure if the sphere idea works. I did a lot of pushing to get the spiral structure to show. Still, there's a foggy look to the galaxy to my eye. Processing the very bright spiral disk and the faint outer disk makes this one rather a challenge as the brightness range is unusually high. While I call the galaxy flocculent, unlike a typical flocculent galaxy the arm segments are organized into easy to follow arms, it's just that these arms are made up of many short segments.

As to the distance issue; if the galaxy is only 14.8 million light-years away then it is only 9500 light years across. That seems way too small to me to have such ordered structure. Galaxies this small are usually devoid of much recognizable structure. Even at the 38.5 million light-years it is only about 25,000 light-years across. While that fits its structure it seems unusually well behaved for such a small galaxy.

Conditions were poor for this image as noted by the broken trail of the bright asteroid (45878) 2000 WX29 to the left and a bit down from NGC 278. The gap is due to clouds. Note too the very start of the trail is the brightest portion (conditions were good when I started) then there's a very short break and it continues fainter as the trail fades away. I had to shut down for some time. Conditions did then look rather good so I started in. Note the start of the second trail is a bit brighter than the rest indicating it again went somewhat downhill. Color data was taken days later when the asteroid was long out of the field. Seeing was well below average though this is quickly becoming the new average, unfortunately. The galaxy was discovered by William Herschel on December 11, 1786 but is in neither of the H400 observing programs.

The only other galaxy in the image that NED had any redshift data on is CGCG 550-017 below and a bit left of the start of the asteroid trail. Its redshift puts it somewhat over a half billion light-years distant. With only the two galaxies and one asteroid, I didn't bother to prepare an annotated image.

14" LX200R @ f/10, L=4x10' RGB=2x10', STL-11000XM, Paramount ME


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NGC0279

NGC 279 is a large galaxy in north-northeast Cetus that is about 160 million light-years distant. I measure its size at about 133,000 light-years. This one was suggested to me by Sakib Rasool who called it a shell galaxy. NED classifies it as (R')SAB(r)0+ pec: I can't say I see a bar but it certainly is peculiar. Shell galaxies are thought to be caused by stars ripped from galaxies it has absorbed. So are plumes of stars ripped from colliding galaxies. The dividing line between the two is so fuzzy I won't go there. Just that I note the far north and south regions of the plumes or shells are bluer than a red region that surrounds an inner bluer (still red) region. The overall shape is quite irregular, with bulges and a loop to the north and maybe south. For all its unique characteristics I found little about what might have caused its odd shape. SIMBAD even lists it as a possible quasar. I guess due to its bright core. At only 160,000 light-years I find that rather unlikely. It appears most died out a billion or two years ago. If true this one may be the nearest known. I just don't buy this, however. NGC 279 was discovered by William Herschel on October 1, 1785 but isn't in either Herschel 400 observing program.

This part of the sky is poorly studied for galaxies. Only a few had redshift data at NED. Some weren't listed as galaxies but as Ultraviolet Sources (UvS). One had a redshift that puts it over 5 billion light-years distant and another over 6. They may be true quasars though NED didn't even list them as a candidate quasars.

Since these were usually found by the GALEX UV satellite the positions are rather vague. The only one I've listed is so vague I'm not sure what object was meant. There are three overlapping galaxies to the upper left of NGC 269. The position is between the upper two, closer to the center one. But the error circle is so large it overlaps all three. Another was so vague several objects were in its even larger error circle but nothing was close to the center of the circle. I passed on including it.

I may not have even prepared an annotated image but for the 9 asteroids I've labeled. A couple others were so faint I didn't try to annotate them. The field is only about 7 degrees from the ecliptic. It's not uncommon to find a lot of them when imaging near the ecliptic. This isn't a record which is 13 or maybe 14, I can't recall but it is more than normal even near the ecliptic.

I should be used to some rather unusual names for asteroids but (17058) Rocknroll surprised me. Its naming citation reads: "(17058) Rocknroll = 1999 GA5
Rock and roll music, which had its roots in African-American rhythm and blues, remains a prominent form of popular music worldwide since hitting the charts in the 1950s."

There is a galaxy cluster near the top center of the image. I've labeled it though there was no galaxy seen at its center position which is just a bit right of a pair of galaxies or stars. No size was given but I see lots of possible distant near star-like galaxies in the area that I assume are part of the cluster.

14" LX200R @ f/10, L=4x10' RGB=2x10', STL-11000XM, Paramount ME


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NGC0296

The USGC U037 galaxy group is something you take waiting for the next Arp galaxy to get in position. It is a small group of 5 galaxies averaging about 250 million light-years away. This field is not well cataloged. Only about 20 galaxies in the image are in NED's catalogs. Only the 5 in the group have redshift data. The rather big blue galaxy on the western edge of my image isn't cataloged at NED nor is the very odd linear blue feature just southwest of UGC 244. On the raw image, I figured it to be a star and edge on galaxy of some sort. When both came back the same shade of blue I began to wonder if this was coincidence or it is just one object. Unfortunately, that is still an unanswered question. But after processing the eastern part, I thought a star, is elongated so it's not a star. Maybe two galaxies both very blue? If so they sure line up.

The biggest galaxy in the group is NGC 296, a nice spiral. But NED and the NGC project see it very differently. NED says it is SBb a barred spiral with moderately spread arms. The NGC project says it is Scd. A spiral (not barred) with much wider spaced arms. I think I see a bar when I enlarge the image but its arms seem wider than NED suggests so I'd say maybe SBcd combining the two to some extent.

The Sky and some other catalogs I have show NGC 295 in the image. They plot it close to NGC 296. Some put it almost on top of 296 as if it were a double listing. The sky moves it about 4 minutes of arc southwest. Dr. Corwin of the NGC project says it is "lost" though he hasn't searched too widely for it. The rest of the galaxies in the group are UGC 548, UGC 565, UGC 566 and UGC 567. Some catalogs list UGC 565 as NGC 296. So for a poorly cataloged area, it sure has some identification issues. It was discovered by William Herschel on September 12, 1784 but is not in either H400 program.

Distances in the annotated image -- all 5 of them -- are in millions of light years rather than billions I normally use. Three digits of accuracy I display are from NED (5 year WMAP) which far exceeds our ability to translate redshift into distance. A nice round quarter of a billion light years for all is more like it. NED lists distance measurements to NGC 296 ranging from 142 million light years to 261 million light years. That's quite a difference.

14" LX200R @ f/10, L=4x10' RGB=2x10'x3, STL-11000XM, Paramount ME


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NGC0317

NGC 317 is a pair of interacting galaxies a bit under 4 degrees from the center of the far more famous and nearby galaxy, M31 in Andromeda. The pair is about 230 to 240 million light-years distant by redshift. Actually, it is a triple system with CGCG 536-014 to the south. The northern galaxy of the pair is NGC 317A and is classed as S0 by NED. A note at NED adds: "Neutral, spherical compact, with a faint blue halo." In my image, I see a blue blob in this halo indicated by the question mark in the annotated image. It isn't listed in NED. I have no idea what it might be. NGC 317A is about 47,000 light-years in diameter assuming the distance is about 230 million light-years.

The southern galaxy of the pair, NGC 317B is classed at NED as Sb though I also see SB? listed for its morphology and a note at NED says: "Blue, post-eruptive Sc galaxy." In any case, it has a large plume to the southeast. Is the faint blue plume about NGC 317A another plume from NGC 317B or really part of NGC 317A. Considering how red it is otherwise I sort tend to favor the first possibility. NGC 317B is also listed as being a LIRG or Luminous Infrared Galaxy. This could be an indication of strong star formation hidden from our view by dust. Though I found nothing much on this other than the LIRG mention. Ignoring the plume it is about 78,000 light-years across. Assuming the plume to the north is also part of this galaxy its diameter including the plumes is about 220,000 light-years. The galaxy is also known as UGC 00594. The pair was discovered by Lewis Swift on October 1, 1885.

To the south is CGCG 536-014 or as NED prefers UGC 00594 NOTES 01. This latter designation indicates the UGC gives the number 594 to both NGC 317B and CGCG 536-014. But the UGC gives NGC 317A its own number of UGC 00593. I don't understand this reasoning at all.

NED lists a few IR galaxies from the 2MASX catalog but none have redshift data and most don't even have a magnitude. Therefore I didn't list them.

I originally imaged this field back in 2007. My processing of it was very poor. Somehow my record keeping lost the fact I'd taken it so I reimaged it last January. But, as usual, conditions that night were the typical poor conditions I've had for far too long now. Back in 2007, I wasn't very careful about camera alignment. Those images were off of true north by about 3.5 degrees turned to the east. Back then I'd taken 7 ten minute frames trying for the plume but due to poor conditions that night as well it didn't come out all that great. Also, I only managed one 10 minute frame of each color. That data was really hurting. This time I took 10 luminance frames but due to clouds, only 4 were usable. Of the 4 frames for each color only 2 were usable. So this image is a combination of the two nights using a total of 11 luminance frames with all color from the new attempt. Since most of the luminance data was from the frames twisted eastward I kept that alignment. This resulted in having to crop quite a bit from the image so this one is somewhat smaller in size than normal but still at my normal 1" per pixel. For laughs, the December 2007 image can be seen at: http://www.spacebanter.com/attachment.php?attachmentid=1614&d=1200603897 .

14" LX200R @ f/10, L=11x10' RGB=2x10', STL-11000XM, Paramount ME


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NGC0337

NGC 337 is a strange looking, possibly barred, spiral located in Cetus 60 to 70 million light-years distant. I measure its size at about 50,000 light-years. NED and Seligman classify it as SB(s)d with HII emission. The NGC Project says Sc -- they see no bar, neither do I. It has no central bulge which is unusual. It's disrupted state may be due to a merger. Here is what one source says about it: "The arms in NGC 337 cannot be well traced from the nucleus. Perhaps part of the central pattern is a bar, from whose opposite ends originate two of the arm fragments, but the pattern is not regular. The association of the other segments with any overall spiral pattern as a whole is even less obvious.

"The irregular morphology of the arm segments may be due to a close encounter; this might be established if the small structure with a central knot (a nucleus?) and associated bar with its associated stubby (s)-type arms can be identified as a companion. But it is not certain that this galaxy is, in fact, a companion, or even if so, if it is ready to merge."

Another paper http://arxiv.org/pdf/1304.0447v1.pdf says it contains 8 ultraluminous X-Ray sources and is bulge-less. These may be due to the long-sought intermediate-mass black holes. They correspond to the bright blue and pink HII regions seen in my image. I thought one to be the galaxies core as it was slightly red but when I added H alpha data it turned out to be a bright nebula with the core a bit below it. I'm unaccustomed to seeing emission nebula this close to a galaxy's core. Checking the Sloan image it is bright blue indicating it is full of young UV stars. Sloan's filters miss H alpha so these regions are always blue in their filters. It is possible the quote above may be seeing this HII region as the possible "companion" it mentions.

The galaxy was discovered by William Herschel on September 10, 1785 and is in the second Herschel object observing program. This is what put it on my to-do list. Oh yes, the galaxy has had two recent type II supernovas; SN 2011DQ and SN 9/2014. This is consistent with it being a starburst type galaxy.

Only one other galaxy in the image has a redshift value and that is one of a pair of galaxies on the right edge of my image. The one is at 1 billion light-years. The "companion" is not listed so could just be line of sight and not a real companion. I suspect they are a real pair but without more, I'm left guessing. With so little data I'd not have prepared an annotated image but then two asteroids appeared in the image so I prepared one to give the details on these two space rocks.

14" LX200R @ f/10, Ha=3x30' L=4x10' RGB=2x10', STL-11000XM, Paramount ME


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NGC0428

NGC 428 is one odd looking galaxy in Cetus. Redshift puts it 38 million light-years away. Unfortunately, the error bar of redshift is at least this great meaning it could be twice as distant. In fact, Tully-Fisher measurements put it between 45 and 54 million light-years distant. The longer estimate may be the more accurate. It is classed as SAB(s)m with HII emission. Galaxies of the Magellan class tend to look rather messed up. Are they naturally this way is the question. I see one note at NED that says; "Two bar-like bright regions suggest that an interaction may be occurring, and one of the bars has more bright knots than the other. The galaxy is not detected at radio wavelengths by NH." Usually, if there's interaction involved you'd expect rather high radio activity. If it is 50 million light-years distant it would be about 60,000 light-years across. If the redshift distance of is right then it is about 45,000 light-years across.

North of NGC 428 is the dwarf irregular galaxy LEDA 135629. It appears as a blue smudge. Was it torn apart by NGC 428? They have a similar redshift. But the galaxy looks rather typical of its type so I doubt any interaction. Still, they make an interesting pair. NGC 428 was discovered by William Herschel on December 20, 1786 but isn't in either H400 program.

Galaxy cluster WHL J011247.4+005254 is south of NGC 428. Its position is within a second of arc of a galaxy that is not listed at NED. Still, I think it likely the anchor of the cluster. The cluster is listed as having 12 members in a 1.38 minute diameter circle. Several other faint galaxies are within this area. Another galaxy cluster is at the bottom of the image a bit left of NGC 428. It, GMBCG J018.27683+00.82032 and the galaxy, GMBCG J018.27683+00.82032 BCG do have the same position. The cluster is listed as having 9 members with no size given. The galaxy cluster NSCS J011344+010621 is in the upper left corner at 2.3 billion light-years. NED shows it to have 19 members in a 2.65 minute circle.

SDSS J011310.00+005012.3, bottom center, has two very different redshifts given at NED. One puts it at about the same distance as NGC 428 while the other puts it nearly 400 million light-years further away. While it does seem to have a low surface brightness like others in the NGC 428 group I doubt the redshift measurement that puts it at the distance of NGC 428 can be right. NED also prefers the further distance.

Three asteroids are in the image:
(251334) 2007 EZ3 at magnitude 19.5
(244947) 2003 YP81 at magnitude 18.6
(127014) 2002 GY11 at magnitude 20

As usual, the annotated image shows the light travel time distance to all objects in the field that NED had the needed data. Labels are immediately right of the object unless a line is drawn to the object. Also, I included catalog names for objects likely part of the same group as NGC 428 as well as galaxy clusters. Interestingly, all galaxies in the vicinity of NGC 428 are dwarf irregular galaxies of very low surface brightness. While far larger NGC 428 is considered a low surface brightness galaxy that has little regular structure same as its traveling companions. There were quite a few noted quasars and UvES objects (likely quasars) in the field which are noted by a Q or the UvES label and their light travel time distance.

14" LX200R @ f/10, L=4x10' RGB=2x10'x3, STL-11000XM, Paramount ME


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NGC0446

NGC 446/IC 89 is a ring galaxy in southern Pisces about a quarter of a billion light-years distant. That would make it about 120,000 light-years in diameter a quite large galaxy. NED classifies it as (R)SAB0^0^ Sy? while the NGC project says (R)SAB. There seems to be a big divide in the literature on whether this galaxy is a Seyfert galaxy or not. Each side seems to think it's obvious and they are right. The galaxy was discovered on October 23, 1864, by Albert Marth but he got the position wrong by a bit over a minute of arc. There's nothing at his location. It was rediscovered years later by Stephane Javelle on August 20, 1892, who got the position correct. Dreyer, not realizing the duplication gave Javelle's entry the designation of IC 89. Some sources incorrectly show a galaxy just west of the southwestern corner of my frame as NGC 446. The faux NGC 446 is PGC 4494/UGC 794. If I'd have realized this at the time I'd have framed it differently so as to pick it up. Seems I need to research before shooting rather than after but I'm so far behind I doubt that will happen anytime soon. You can read more on this mix-up at the NGC Project under NGC 446 and IC 89. Each tells the story a bit differently but comes to the same conclusion.

The field contains two star-like objects that NED identifies as quasars even though there is apparently no spectroscopic data to support this. If there were then the z value should be given and it isn't. They are listed in the Gosset, Clowes, Surdej catalog of quasars. No other source identifies them as quasars.

The field is poorly studied. Very few of the background galaxies are even listed in NED as galaxies. Some are listed as UvS objects. Over 500 such objects are in this image, most being stars. No way I can determine which are galaxies without a one by one examination of their PSF in my raw FITs image. If I had a couple years of free time in a jail cell with nothing else to do I might try it. Otherwise, it isn't going to happen. Besides some of the background galaxies aren't UvS objects either so just not listed at all. Only NGC 446 had a redshift value. If not for three asteroids, two faint, I'd not have bothered with an annotated image. The bright asteroid is Stevebabcock. Its naming citation reads: "Steven Babcock mentored a finalist in the 2004 Discovery Channel Youth Science Challenge (DCYSC), a middle school science competition. He teaches at the Beaumont Middle School, Portland, Oregon."

14" LX200R @ f/10, L=4x10' RGB=2x10', STL-11000XM, Paramount ME


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NGC0450

NGC 450, located in Cetus, and it's "companion" UGC 807 would seem to qualify for Arp's Atlas of Peculiar Galaxies on two accounts. First NGC 450 is a low surface brightness galaxy which was Arp's first category. Secondly, it would also qualify as a spiral with a high surface brightness companion on its arm. Guess he figured he had enough of both. In many cases of his category for spirals with companions on the arms, there were no redshift values either at the time of his atlas or today to decide if they were real companions or just line of sight galaxies. In many cases, the small galaxy seemed undimmed by the dust and gas of the spiral. I'd mention I didn't think they were related with the small one likely far beyond the bigger spiral. I'd get challenged on that from time to time. I'd point out that its quite possible for a spiral to have used up most of its dust and gas except in obvious dust lanes so the lack of dimming didn't necessarily mean the companion wasn't a distant galaxy.

This galaxy fits my argument. In this case, we do have redshift values for both galaxies. NGC 450 is about 67 million light-years distant while its "companion" has a redshift that puts it at 500 million light-years! So it is a much larger galaxy seen very far away. Even though we see dust lanes in NGC 450 there's no evidence of attenuation of UGC 807 by dust and gas in NGC 450. Contrast is reduced at its southwest end due to being seen through a much brighter part of the foreground galaxy. Spectra data shows no additional absorption lines from gas in NGC 450.

NGC 450 is classed as SAB(s) cd: by NED and the NGC Project. UGC 807 is classed by NED as simply S for it is a spiral galaxy. The blue star-like object below the southwest end of the "companion" is considered "Part of Galaxy" so apparently is a bright blue star cluster. Below and left of it is a redder star-like object. This is considered an HII region in the galaxy. Right and down from the blue object is a fuzzier object. The Sloan survey lists it as simply a galaxy. I've seen this with what is really a part of the main galaxy. In these cases, NED makes note of this. Here they make no correction. No redshift is available to answer this. For now, it too may be a distant galaxy seen through this low dust and gas galaxy. But consider further down and to the right is a star-like point of about the same color. It too is listed as a galaxy. Just right of the core is an even redder "star" which too is listed as a galaxy. Many others are listed at NED. I see no hint of this population of similar "galaxies" beyond NGC 450's borders. So I have to think these are more likely star clusters or HII regions in NGC 450 or possibly a foreground star in our galaxy rather than true galaxies. It was discovered by William Herschel on October 1, 1785 but isn't in either H400 program.

The only other NGC galaxy in the image is NGC 442 in the lower right with a prominent dust lane. It is classed as Sa-Irr II by the NGC project and S0/a: sp by NED. The S0 part seems odd to me It gets the irregular tag due to plumes that seem to come off each end. While I see them barely in the raw FITS they didn't survive the gradient removal caused by 38 Ceti. That star threw nasty reflections all across the image, one right on top of NGC 442. I can't tell real plume from nasty reflections from 38 Ceti. I need to take the galaxy with the star out of the field to pick up the plumes. I didn't expect so much junk from the star. At 240 million light-years it is unrelated to NGC 450 or its distant "companion." It was discovered by Lewis Swift on October 21, 1886.

The image has quite a few quasars and distant galaxies. Their distances in billions of light-years are shown in the annotated image.

14" LX200R @ f/10, L=4x10', RGB=2x10'x3, STL-11000XM, Paramount ME


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NGC0488

This one reminds me of a hypnotist's spiral or maybe a time vortex. O'Meara calls it the Whirligig Galaxy

NGC 488 is a tightly wound spiral (SA(r)b) located in Pisces about 90 million light-years away by redshift measurement or 95 by Tully-Fisher analysis of its rotation rate. Being nearly face on that must be a tough measurement. It seems to be made up of mostly arm segments that go only about halfway around then fuzz out. Still, I seem to see but one continuous spiral if I follow the fuzz between segments. This is easier to do if the image is enlarged some. Unfortunately, seeing wasn't all that good so I had to limit my enlargement to only 33% or 0.75" per pixel.

The field isn't covered by the Sloan Digital Sky Survey so few of the galaxies are cataloged. I've labeled all that are and include distance data for those few that had it. One galaxy cluster (GC) is annotated in the image. The line points to its center. NED shows it containing 17 galaxies but gives no size. It shows it as about 3 billion light years distant. Most members in my image appear to be east of the center.

The galaxy was discovered by William Herschel on December 13, 1784. My entry from the original H400 with my 10" f/5 on September 6, 1985 at 110x with some aurora lighting the sky reads: "Lage, oval patch of a galaxy. Seems to blend into the nearby field stars making it difficult to see. Seems rather elongated (about 2.5'x1'). This may be influenced by the effects of the field stars mentioned above."

There is one "bright" asteroid of 19th magnitude and several of 20th. Due to the bad seeing and low transparency as well as their rapid motion they are fainter than normal. I didn't label the 20th magnitude ones. The gap in the trail is due a meridian flip 20 minutes into the image. On cold winter nights like this one (outside temperature was below -30C) I slew at only 30% normal speed. That means a couple minute delay in the flip. The gap is longer than this as I apparently allowed 7 minutes for the flip instead of the 3 I usually program in. Even 3 would have shown a gap, however.

Due to my mind seeing this as a time vortex I've included an "enhanced" version.

14" LX200R @ f/10, L=4x10' RGB=2x10'x3, STL-11000XM, Paramount ME


NGC488L4X10RGB2X10X3-CROP125.jpg


NGC488L4X10RGB2X10X3-ID.jpg


NGC488L4X10RGB2X10X3.jpg


NGC488L4X10RGB2X10X3timevortex.jpg