Object name: NGC3501
Designation(s): NGC3501, NGC3507,
NGC 3501 attracted my attention as it is a neat flat galaxy being #1187 in the Flat Galaxy Catalog. It is classified as Scd by NED and Seligman but the NGC project says Sc. I suppose this difference is partly due to the difficulties of classifying a galaxy seen edge on. Note the lack of any hint of a central bulge. Since there is an apparent correlation between the size of the central bulge and the size of the black hole in a spiral's core it would appear this galaxy has a very small black hole. Also, I saw a recent article saying galaxies without a central bulge have had few if any mergers. I'm not sure I buy that one. The galaxy is located in Leo and is about 68 million light-years distant by redshift and 78 million light-years by the median of many Tully Fisher measurements. Using the redshift distance I get a size of about 80,000 light-years. The galaxy was discovered on April 23, 1881 by Édouard Stephan. I'm surprised William Herschel missed it.
Related Designation(s):1AXG J110325+1808, 2MASS J11024731+1759217, 2MASS J11032536+1808075, 2MASX J11024730+1759223, 2MASX J11032539+1808072, 2MASXi J1102470+175916, 2MASXi J1103253+180813, 2MASXi J1103254+180813, 2MFGC 08610, AKARI J1103250+180825, ASK 619357.0, CGCG 095-097, CGCG 095-100, CGCG 1100.2+1815, CGCG 1100.8+1824, CXO J110325.3+180807, CXO J110325.35+180807.5, EON J165.697+17.989, FGC 1187, HDCE 0632 NED005, HDCE 0632 NED006, HIPASS J1103+18, HOLM 224A, HOLM 224B, KPG 263A, KPG 263B, LDCE 0778 NED017, LDCE 0778 NED018, LGG 228:[G93] 002, MCG +03-28-051, MCG +03-28-053, NGC 3501, NGC 3507, NGC 3507:[L2011a] X0002, NGC3501, NGC3507, NSA 111355, NSA 138648, NVSS J110247+175913, NVSS J110325+180813, PGC 033343, PGC 033390, RFGC 1945, SDSS J110247.26+175921.6, SDSS J110325.36+180807.5, UGC 06116, UGC 06123, USGC U340 NED16, USGC U340 NED17, UZC J110247.3+175921, UZC J110325.6+180809, [BEC2010] HRS 034, [GMM2009b] 23, [M98j] 109 NED01, [M98j] 109 NED02,