Object name: NGC4411

Designation(s): NGC4411, NGC4441B, NGC4410, NGC4410B, NGC4410C, NGC4410D, NGC4410G, NGC4410H, NGC4410I, ABELL1541,

The area around the galaxy groups of NGC 4410 and NGC 4411 is a very galaxy dense region in Virgo but only 3 of the galaxies are likely members of the Virgo Cluster. They are NGC 4411a and b as well as VCC 933. The two NGC 4411 spirals have a nearly identical redshift that puts them 74 million light-years away but Tully Fisher measurements put them at a more realistic 55 million light-years. NGC 4411a is considered the true entry for NGC 4411 though some sources incorrectly give the honor to NGC 4411b. The sky takes no sides and calls both NGC 4411 but will use the correct one when forced to choose between them. NGC 4411a was discovered by Christian Peters in 1881. The star just off the core was seen by Arnold Schwassmann on January 23, 1900 and is entered into the IC as #3339. He may have mistaken the star for the core and thus did see the galaxy. NGC 4411b was probably seen by Bigourdan on April 25th, 1895 it never made it into the NGC or IC catalogs but is now known as NGC 4411b. While they apparently lie close together they don\'t show any sign of interaction.

That\'s not the case with the NGC 4410 group to the north. Why Arp failed to include it in his atlas I don\'t understand. NGC 4410 is a pair of interacting, highly distorted galaxies about 350 million light-years distant. It was discovered by John Herschel on January 18, 1828. Both are quite red galaxies with plumes going every which way. The major plume goes to the northeast apparently connecting with NGC 4410C and NGC 4410D. NGC 4410C was discovered by Bigourdan the same night he found NGC 4411b. Like the NGC 4410 pair, it too is a rather red S0 galaxy with an AGN core. This may indicate true interaction with NGC 4410. The plume then bends at NGC 4410C to head toward NGC 4410D though seems to go a bit south of that galaxy. Still, there is a faint plume north of it as well. It is the bluest of the four. Other than the plume going near it I can\'t see any hint of distortion or other sign of interaction. It might be there\'s no connection however that makes the kink in the plume\'s direction at NGC 4410C harder to explain.

While there are quite a few other members of the group. The group goes through NGC 4410K in my image though one is off the frame to the north. A couple, however, aren\'t real members, G and I are more than three times the distance of the others.

The image is full of interesting galaxies. On the far right is LEDA 1356246 which seems to be a pair of galaxies, the eastern one small and blue. They may be totally unrelated but without redshift data on the eastern one, I can\'t say.

On the eastern side near a very bright orange star is AGC 225023 which seems to have a large but faint plume to the south-southwest. There\'s a small galaxy on the southwest edge of it that\'s not listed at NED. It probably is background but it could be the remains of whatever created that large \"wind effect\" plume to use Arp\'s terminology.

I\'m a bit puzzled by the galaxy cluster Abell 1541C which is listed as being at the distance of the Virgo Cluster and thus the NGC 4411 group to the west but nothing at that distance is around its location which is exactly the same as for Abell 1541A which matches the NGC 4410 group well to the northeast. The cluster at that location, Abell 1541, without a letter, which, while having no redshift distance listed seems to be the cluster anchored by two large galaxies at 1.18 to 1.20 billion light-years. Another somewhat smaller cluster at about the same distance is to the north is anchored by LEDA 94216.

Over 100 other galaxies had redshift data so are included in the annotated image along with one lone asteroid and a quasar with a z>2. Several other quasars were listed but are seen through bright galaxies and while I can find them in the Sloan image they didn\'t make it through my rather poor seeing so I didn\'t try to point out what I couldn\'t see. This is likely the densest annotated image I\'ve attempted to date. It did take more than my usual 45 minutes to do!

Unfortunately, seeing was very poor for this one. I didn\'t look at it until months later so will try again next spring on a better night as this field deserves better than this. (Edit: Still hasn\'t happened.)

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