Object name: ARP308

Designation(s): ARP308, ARP133, NGC0535, NGC0541, NGC0543, NGC0545, NGC0548, NGC0547, MINKOWSKIS_OBJECT,

Arp 308 is a pair of galaxies; NGC 545 and NGC 547 that is associated with the radio source 3C40. That is NGC 547 is considered to be the source of 3C40. Arp put the pair in his category of simply double galaxies. His simple remark says: "Close ellipticals." which isn't very informative. NGC 545 to the north is listed as an SA0 galaxy while NGC 547 is E1 and a bright cluster galaxy. Redshift puts it at 6 million light-years further from us that NGC 545. However, NED gives a D-Sigma distance determination that is the same for both. Likely the difference in radial velocity is due to relative motion rather than distance. The exact same D-Sigma distance is found for NGC 541 (Arp 133) as well. A 1964 paper concludes NGC 545 is not interacting with NGC 547. I find that hard to accept.

Notes about the annotated image.
Objects considered part of Abell 194 are listed by name.

Redshift distance using NED's 5 year WMAP assumptions are used. They are expressed in billions of light-years. Differences in cluster member radial velocity are most likely due to relative velocity around the cluster's center of mass rather than a true distance indicator. Most, likely lie within a few million light-years of each other. The label is immediately right of the object when possible. Otherwise, a line will connect the object and its label.

XMMU J012535.9-012546 is an X-ray galaxy. It appears to be a very compact dwarf of some sort.

ARK 45: A note at NED says "Together with NGC 0547 this is the radio source 3C 40." I'm not sure how this was determined, especially since NGC 545 is in the middle yet not considered part of 3C 40 that I found. Also, note its redshift is surprisingly different.

NSCS J012537-011739 is a galaxy cluster at 4.97 billion light-years. It contains 36 members. The diameter isn't specified. I see a dozen or two within a few minutes of the center. Many look like faint stars.

WHL J012538.1-011301 is another galaxy cluster at 5.3 billion light-years. It contains only 8 members. Its center is a couple seconds of arc from a faint galaxy, probably the anchoring member. The NED position is only approximate so likely means to point to this galaxy.

The UvES (Ultraviolet Excess Source) is likely a quasar given its distance.

Arp's image of these galaxies is made from the same plate and cropped to exclude the other atlas entry. Most of his images are shorter than the one hour exposure on 103a-0 image. The added time is likely due to losses in the "Polaroid" filter. He lists the seeing as average 1" to 1.5".

NGC 535 and 543 were discovered by Heinrich d'Arrest on October 31, 1864.
NGC 541 was discovered by Heinrich d'Arrest on October 30, 1864.
NGC 545 and 547 were discovered by William Herschel on October 1, 1785. It isn't in either Herschel 400 observing program.
NGC 548 was discovered by George Searle on November 2, 1867.

Arp's image of Arp 308

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

Related Designation(s):

1WGA J0126.0-0120, 2MASS J01253113-0124294, 2MASS J01253127-0124278, 2MASS J01254430-0122460, 2MASS J01254998-0117340, 2MASS J01260061-0120426, 2MASS J01260250-0113322, 2MASX J01253116-0124291, 2MASX J01254430-0122461, 2MASX J01254997-0117341, 2MASX J01260057-0120424, 2MASX J01260251-0113324, 2MASXi J0125311-012429, 2MASXi J0125443-012246, 2MASXi J0125499-011734, 2MASXi J0125591-012024, 2MASXi J0126006-012042, 2MASXi J0126025-011332, 2XMM J012544.3-012245, 2XMM J012559.0-012024, 2XMM J012600.5-012041, 2XMMp J012544.3-012246, 2XMMp J012559.0-012024, 2XMMp J012600.5-012041, 3C 040, 4C -01.08, 6dF J0126006-012043, 87GB[BWE91] 0123-0136, ABELL 0194:[ASS80] 01, ABELL 0194:[ASS80] 06, ABELL 0194:[ASS80] 07, ABELL 0194:[ASS80] 10, ABELL 0194:[D80] 034, ABELL 0194:[D80] 035, ABELL 0194:[D80] 037, ABELL 0194:[D80] 042, ABELL 0194:[D80] 043, ABELL 0194:[D80] 053, ABELL 0194:[D80] 056, ABELL 0194:[HKT2006] 01, ABELL 0194:[HKT2006] 08, ABELL 0194:[HKT2006] 56, ABELL 0194:[L84] G1, ABELL 0194:[L84] G2, ABELL 0194:[LCR98] 03, ABELL 0194:[LCR98] 12, ABELL 0194:[LGC91] 0102, ABELL 0194:[LGC91] 0105, ABELL 0194:[LGC91] 0110, ABELL 0194:[LGC91] 0111, ABELL 0194:[LGC91] 0116, ABELL 0194:[LGC91] 0118, ABELL 0194:[LGC91] 0121, ABELL 0194:[NDG99] A, ABELL 0194:[NDG99] B, ABELL 0194:[NFS85] 104, ABELL 0194:[PL95] BCG, ABELL 0194:[ZBO89] O1 NED01, ABELL 0194:[ZBO89] O1 NED02, ABELL 0194:[ZBO89] O2, ABELL 0194:[ZBO89] R2, ABELL 0194:[ZH64] 01, ABELL 0194:[ZH64] 02, ABELL 0194:[ZH64] 03, ABELL 0194:[ZH64] 04, ABELL 0194:[ZH64] 10, ABELL 0194:[ZH64] 11, APMUKS(BJ) B012311.26-013820.9, APMUKS(BJ) B012314.23-013754.6, APMUKS(BJ) B012316.83-013308.8, APMUKS(BJ) B012326.77-013606.0, APMUKS(BJ) B012329.36-012906.2, ARP 133, ARP 308, ARP 308 NED01, ARP 308 NED02, ARP133, ARP308, ASK 032668.0, AT20G J012600-012041, BMW-HRI J012558.8-012023, BMW-HRI J012600.2-012040, BMW-HRI J012600.4-012039, BMW-HRI J012600.7-012040, CGCG 0123.0-0139, CGCG 0123.2-0137, CGCG 0123.3-0132, CGCG 0123.4-0135, CGCG 0123.5-0129, CGCG 0123.5-0136, CGCG 385-124, CGCG 385-128, CGCG 385-130, CGCG 385-132, CGCG 385-133, CGCG 385-134, CTA 012, CXO J012544.3-012246, CXO J012600.6-012024, CXO J012600.6-012042, DA 042, EXSS 0123.4-0135, GALEXASC J012531.21-012427.4 , GALEXASC J012549.98-011733.9 , GALEXASC J012559.13-012024.8 , GALEXASC J012602.51-011333.1 , GALEXMSC J012531.09-012429.5 , GALEXMSC J012549.84-011738.5 , GALEXMSC J012559.11-012024.2 , GALEXMSC J012602.33-011331.5 , HDCE 0075 NED010, HDCE 0075 NED013, HDCE 0075 NED014, HDCE 0075 NED015, HOLM 042, HOLM 042A, HOLM 042B, KPG 032, KPG 032A, KPG 032B, LDCE 0089 NED011, LDCE 0089 NED014, LDCE 0089 NED015, LDCE 0089 NED016, LEDA 073957, LGG 022:[G93] 006, LGG 025:[G93] 002, LGG 025:[G93] 004, LGG 025:[G93] 011, LGG 025:[G93] 015, LGG 025:[G93] 016, LHE 029, LQAC 021-001 005, MCG +00-04-133, MCG +00-04-137, MCG +00-04-138, MCG +00-04-141, MCG +00-04-142, MCG +00-04-143, MINKOWSKIS OBJECT, Mr18:[BFW2006] 08702 NED02, Mr19:[BFW2006] 11007 NED01, MSH 01-005, NGC 0535, NGC 0541, NGC 0543, NGC 0545, NGC 0547, NGC 0548, NGC0535, NGC0541, NGC0543, NGC0545, NGC0547, NGC0548, NRAO 0070, NSA 006676, NSA 129556, NSA 129581, NSA 129590, NSA 129601, NSA 129602, NVGRC J012600.6-012052, NVSS J012543-012241, NVSS J012600-012052, NVSS J012602-011335, OC -039, PGC 005282, PGC 005305, PGC 005311, PGC 005323, PGC 005324, PGC 005326, PKS 0123-01, PKS B0123-016, PKS J0126-0120, RESOLVE rf0196, RSCG 11:[WBJ2013] A, RSCG 11:[WBJ2013] B, RSCG 11:[WBJ2013] C, RSCG 11:[WBJ2013] D, S3 0123-01, SDSS J012544.31-012246.4, SDSS J012547.03-012218.4, SDSS J012547.39-012221.0, SDSS J012549.99-011734.1, SDSS J012559.12-012024.7, SDSS J012600.63-012042.5, SDSS J012602.49-011332.1, SDSS J012602.50-011332.1, SDSS J012602.50-011332.2, SDSS J012602.51-011332.1, SDSS J012602.51-011332.2, SSTSL2 J012544.28-012246.2, SSTSL2 J012547.34-012220.9, SSTSL2 J012600.61-012042.4, UGC 00997, UGC 01004, UGC 01007, UGC 01009, UGC 01010, USGC U064 NED02, USGC U064 NED03, USGC U064 NED04, USGC U064 NED31, USGC U064 NED33, USGC U064 NED37, UZC J012531.1-012430, UZC J012544.3-012247, UZC J012550.0-011734, UZC J012559.1-012024, UZC J012600.6-012046, UZC J012602.5-011333, WBL 045-013, WBL 045-016, WBL 045-017, WBL 045-019, WBL 045-020, WBL 045-021, XMMU J012544.2-012247, XMMU J012559.0-012027, XMMU J012600.5-012043, [BDG98] J012531.2-012430, [BDG98] J012544.4-012247, [BDG98] J012547.4-012221, [BDG98] J012550.0-011735, [BDG98] J012559.1-012026, [BDG98] J012600.6-012043, [BDG98] J012602.5-011333, [BFW2006] J021.51048-01.22562 , [DZ2015] 535-01, [DZ2015] 535-02, [DZ2015] 535-08, [DZ2015] 535-10, [DZ2015] 535-13, [GD2000] 6, [GD2000] 7, [HBW2011] J012600.62-012042.5 , [HIK2015] 2931, [KWP81] 0123-01, [LPP2009] 0123-016A, [LPP2009] 0123-016B, [M98j] 021 NED03, [M98j] 021 NED04, [M98j] 021 NED05, [MSC2011] J012600.36-012038.2 , [OSO87] 0123-016A, [PJY2015] 588015507668140113 , [SM2000] 0123-016B, [WB92] 0123-0136,