Object name: ARP315

Designation(s): ARP315, ABELL0779, NGC2825, NGC2826, NGC2827, NGC2829, NGC2830, NGC2831, NGC2832, NGC2834, NGC2839,

Arp 315/Abell 779 is a group of galaxies in southern Lynx. Arp 315 is just 3 of the 83 galaxies in the Abell 779 galaxy cluster that mark the heart and is likely the anchor of the group. Arp put them in his Group of Galaxies category. The three in his atlas are NGC 2830, NGC 2831 and NGC 2832 right to left. They don\'t appear to be interacting so are likely further apart than our perspective makes it appear. His comment reads: \"Companion E [NGC 2831] is quite compact.\"

The group is about 300 million light-years from us. NGC 2832 dominates the group. It is obviously a cD galaxy (\"central Dominant), also under Yerkes galaxy classification, it means by the c that it is a super giant galaxy and the D that it is diffuse (elliptical), galaxy. NED classes it as E2+2 while the NGC project says E4. NGC 2831 is classed as E0 by both. NGC 2830 is simply S under the NGC Project and SB0/a: per NED. It appears to be nearly edge on.

NGC 2825 was discovered on April 3, 1831 by John Herschel
NGC 2826, 2831 and 2832 were discovered on March 13, 1850 by George Stoney
NGC 2830 was discovered by William Herschel on December 7, 1875 but isn\'t in either H400 program

I\'ve prepared an annotated image that shows both the catalog entry and redshift distance per NED using 5 year WMAP data. There is quite a spread likely indicating rather high orbital velocities of the galaxies in the group. Including the identification rather than just the distance greatly increased the file size as well as making it hard to put in labels without overwriting other objects. If the object isn\'t a member of the group I only show its nature (Q-quasar, G-galaxy) and distance. Those without a label had no distance data in NED so I couldn\'t determine if it was a cluster member or not. A few weren\'t in NED\'s database. I noted one of these, a rather bright one, with a question mark. Why these don\'t make the catalog is still a mystery to me. No one seems to know the answer, at least no one has told me.

Looking around the image there are a lot of galaxy pairs and triples, many of which appear to be interacting others just line of sight pairs. There\'s a lot going on all over this image if you go looking for it.

There\'s one asteroid in the image, (230947) 2004 XY54 at magnitude 18.5

Arp\'s image
http://ned.ipac.caltech.edu/level5/Arp/Figures/big_arp315.jpeg

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

Alternate Designation(s): 1RXS J091949.1+334532, 2MASS J09191902+3352511, 2MASS J09192243+3344338, 2MASS J09192418+3337263, 2MASS J09194138+3344168, 2MASS J09194548+3344420, 2MASS J09194685+3344591, 2MASS J09200251+3342376, 2MASS J09203631+3339027, 2MASX J09191903+3352510, 2MASX J09192241+3344340, 2MASX J09192419+3337260, 2MASX J09194142+3344170, 2MASX J09194687+3344594, 2MASX J09200250+3342374, 2MASX J09203631+3339030, 2MASXi J0919189+335251, 2MASXi J0919224+334434, 2MASXi J0919241+333726, 2MASXi J0919413+334417, 2MASXi J0919468+334458, 2MASXi J0920025+334237, 2MASXi J0920363+333903, 2MFGC 07238, 2MFGC 07240, ABELL 0779, ABELL 0779:[BTM97] 1, ABELL 0779:[CAC2009] BCM, ABELL 0779:[HO98] 201, ABELL 0779:[HO98] 223, ABELL 0779:[HO98] 224, ABELL 0779:[HO98] 250, ABELL 0779:[HO98] 258, ABELL 0779:[HO98] 259, ABELL 0779:[HO98] 260, ABELL 0779:[HO98] 290, ABELL 0779:[L84] G1, ABELL 0779:[MK91] +000+000, ABELL 0779:[PL95] BCG, ABELL 0779:[SOR2012] 01, ABELL 0779:[SOR2012] 03, ABELL 0779:[SOR2012] 04, ABELL 0779:[SOR2012] 15, ABELL 0779:[SOR2012] 20, ABELL 0779:[SOR2012] 22, ABELL 0779:[SOR2012] 31, ABELL 0779:[SOR2012] 39, ABELL 0779:[TCC97] 001, ABELL 0779:[TCC97] 002, ABELL 0779:[TCC97] 003, ABELL 0779:[TCC97] 006, ABELL 0779:[TCC97] 007, ABELL 0779:[TCC97] 009, ABELL 0779:[TCC97] 047, ABELL 0779:[ZBO89] O2, ABELL 0779:[ZBO89] R2, ABELL0779, AGC 190202, AGC 190203, AGC 190223, ARP 315, ARP 315 NED01, ARP 315 NED02, ARP315, ASK 366302.0, ASK 366305.0, ASK 366309.0, ASK 366311.0, ASK 366322.0, ASK 366327.0, ASK 366383.0, CGCG 0916.2+3404, CGCG 0916.3+3357, CGCG 0916.4+3350, CGCG 0916.7+3357, CGCG 0916.8+3358, CGCG 0916.8+3358 NED01, CGCG 0916.8+3358 NED02, CGCG 0917.0+3355, CGCG 0917.6+3352, CGCG 181-015, CGCG 181-017, CGCG 181-018, CGCG 181-023, CGCG 181-024, CGCG 181-024 NED01, CGCG 181-024 NED02, CGCG 181-029, CGCG 181-031, CXO J091946.7+334459, DOC NRGb 032, ECO 03670, ECO 03691, ECO 03703, ECO 05262, ECO 05270, EON J139.851+33.624, FIRST J091924.2+333725, FIRST J091945.4+334442, FIRST J092036.3+333902, GALEXASC J091918.99+335251.4 , GALEXASC J091922.58+334434.2 , GALEXASC J092002.53+334238.2 , GALEXASC J092036.32+333903.8 , GALEXMSC J091919.02+335250.2 , GALEXMSC J091922.59+334434.6 , GALEXMSC J092002.43+334237.8 , GALEXMSC J092036.49+333903.4 , HDCE 0519 NED001, HOLM 123A, HOLM 123B, HOLM 123C, IC 2460, LDCE 0627 NED002, LDCE 0627 NED003, LDCE 0629 NED001, LEDA 2800817, MCG +06-21-009, MCG +06-21-010, MCG +06-21-011, MCG +06-21-013, MCG +06-21-014, MCG +06-21-015, MCG +06-21-021, MCG +06-21-023, MCXC J0919.8+3345, MJV 16809, MJV 16853, MJV 16855, Mr18:[BFW2006] 09722 NED10, Mr18:[BFW2006] 09722 NED11, Mr18:[BFW2006] 09722 NED14, Mr18:[BFW2006] 09722 NED17, Mr19:[BFW2006] 19084 NED01, Mr19:[BFW2006] 19084 NED03, Mr19:[BFW2006] 19094 NED10, Mr19:[BFW2006] 19094 NED12, Mr19:[BFW2006] 19918 NED05, Mr19:[BFW2006] 19918 NED09, Mr20:[BFW2006] 30682 NED01, Mr20:[BFW2006] 30682 NED03, NGC 2825, NGC 2826, NGC 2827, NGC 2829, NGC 2830, NGC 2831, NGC 2832, NGC 2834, NGC 2839, NGC2825, NGC2826, NGC2827, NGC2829, NGC2830, NGC2831, NGC2832, NGC2834, NGC2839, NRGb 032, NRGb 032.025, NRGb 032.026, NRGb 032.027, NRGb 032.034, NRGb 032.035, NRGb 032.037, NRGb 032.041, NRGb 032.044, NSA 064763, NSA 064766, NSA 064771, NSA 064775, NSA 064780, NSA 064816, NSA 135831, NSA 157178, NVSS J091945+334449, PGC 026342, PGC 026345, PGC 026346, PGC 026371, PGC 026376, PGC 026377, PGC 026400, PGC 026425, RASSCALS NRGb 032, RSCG 32, RSCG 32:[WBJ2013] A, RSCG 32:[WBJ2013] B, RSCG 32:[WBJ2013] C, RX J0919.8+3345, RX J0919.8+3345:[BEV98] 001, RX J0919.8+3345:[ZEH2003] 01 , RXC J0919.8+3345, SDSS J091919.00+335250.8, SDSS J091919.01+335250.8, SDSS J091919.01+335250.9, SDSS J091922.43+334433.9, SDSS J091922.44+334433.9, SDSS J091922.44+334434.0, SDSS J091924.16+333726.4, SDSS J091924.17+333726.4, SDSS J091941.40+334417.3, SDSS J091941.40+334417.4, SDSS J091941.41+334417.3, SDSS J091941.41+334417.4, SDSS J091945.48+334441.9, SDSS J091945.49+334441.9, SDSS J091945.49+334442.0, SDSS J091946.86+334459.0, SDSS J092002.51+334237.6, SDSS J092002.51+334237.7, SDSS J092002.52+334237.7, SDSS J092036.32+333902.4, SDSS J092036.33+333902.4, SDSS-g-box-0196, SDSS-g-eon-1072, SDSS-i-box-0254, SDSS-i-eon-1128, SDSS-r-box-0248, SDSS-r-eon-1115, SSTSL2 J091941.39+334416.8, SSTSL2 J091945.49+334441.9, SSTSL2 J091946.78+334459.3, UGC 04939, UGC 04941, UGC 04942, UGC 04942 NOTES01, UGCl 141:[HIV2012] 0043, UGCl 141:[HIV2012] 0046, UGCl 141:[HIV2012] 0050, UGCl 141:[HIV2012] 0051, UGCl 141:[HIV2012] 0055, UGCl 141:[HIV2012] 0060, UGCl 141:[HIV2012] 0087, UGCl 142, UGCl 148 NED01:[HIV2012] 0008 , UGCl 148 NED01:[HIV2012] 0010 , UGCl 148 NED01:[HIV2012] 0016 , UGCl 148 NED01:[HIV2012] 0039 , USGC U223, USGC U223 NED01, USGC U223 NED02, USGC U223 NED04, UZC J091922.5+334435, UZC J091924.1+333727, UZC J091941.4+334418, UZC J091946.8+334459, UZC J092036.3+333903, WBL 216-004, WBL 216-006, WBL 216-007, WBL 216-009, WBL 216-010, WBL 216-012, WBL 216-013, ZwCl 0915.6+3409, [BFW2006] J139.82920+33.88079 , [BFW2006] J139.84347+33.74276 , [BFW2006] J139.85068+33.62400 , [BFW2006] J139.92253+33.73815 , [BFW2006] J140.01046+33.71048 , [BFW2006] J140.15137+33.65067 , [DZ2015] 736-01, [DZ2015] 736-06, [DZ2015] 736-07, [DZ2015] 739-01, [DZ2015] 739-02, [HIV2012] 0042, [HIV2012] 0045, [HIV2012] 0049, [HIV2012] 0050, [HIV2012] 0054, [HIV2012] 0059, [HIV2012] 0086, [HIV2012] 0508, [HIV2012] 0510, [HIV2012] 0516, [HIV2012] 0539, [LVO2003] J091945.5+334553, [M98j] 065 NED01, [MO2001] J091924.2+333726.8, [MO2001] J091941.4+334418.0, [MO2001] J091946.6+334457.5, [PJY2015] 587735662619132128 , [RPG97] 032, [SUV2010] 867, [TTL2012] 383917, [TTL2012] 383920, [TTL2012] 384654, [TTL2012] 384657, [TTL2012] 384661, [TTL2012] 384663, [WGB2006] 091642+33570_a, [WGB2006] 091642+33570_b, [WGB2006] 091642+33570_c,