Object name: M100Designation(s): M100, NGC4322, NGC4323, NGC4328, IC0783A, M 100 is one of the brighter members of the Virgo Cluster of galaxies. Its rapid motion in the cluster makes its redshift unusable for distance. Better estimates using other methods put it about 55 to 60 million light-years distant. It was discovered by Pierre Méchain on March 15, 1781, Messier saw and recorded it April 13, 1781. Since it is in a cluster of galaxies you'd expect to see a lot of neighbors around it and you do. It appears my skies were somewhat cloudy when this was taken but still you can see lots of companions. See the annotated image for details on these.
M100 itself is a great looking face on spiral that appears to have tidally disrupted arms showing it has tangled with other cluster members in the past. You can read more about this galaxy at: http://messier.seds.org/m/m100.html.
NGC 4323 was discovered by Wilhelm Temple in 1882 the same night as he saw NGC 4322 which is just a star. He just mentions he found two very faint objects above M100. Following convention, the western one has been assigned the lower NGC number but some catalogs reverse these two.
NGC 2328 was discovered by William Herschel on March 21, 1784. It's not in either of the H400 observing programs.
14" LX200R @ f/10, L=4x10' RGB=2x10', STL-11000XM, Paramount ME Related Designation(s):1AXG J122254+1549, 1RXS J122256.0+154923, 2MASS J12221960+1544013, 2MASS J12224188+1554119, 2MASS J12225486+1549178, 2MASS J12230169+1554197, 2MASS J12232003+1549133, 2MASX J12221957+1544011, 2MASX J12225489+1549205, 2MASX J12230167+1554196, 2MASX J12232004+1549139, 2MASXi J1222196+154401, 2MASXi J1222548+154920, 2MASXi J1223016+155420, 2MASXi J1223199+154913, 87GB 122023.7+160528, 87GB[BWE91] 1220+1605, AKARI J1222550+154920, ALFALFA 1-289, ASK 438511.0, ASK 438537.0, ASK 438548.0, CGCG 099-030, CGCG 099-031, CGCG 099-034, CGCG 1220.4+1606, CGCG 1220.5+1611, CGCG 1220.8+1605, CXO J122254.8+154918, CXO J122254.84+154918.1, EVCC 0448, EVCC 0467, EVCC 0471, EVCC 0480, FAUST 3105, FAUST V031, GALEXASC J122219.81+154400.9 , GALEXASC J122241.93+155411.6 , GALEXASC J122254.88+154919.1 , GALEXASC J122301.69+155417.9 , GALEXASC J122320.11+154912.2 , GALEXMSC J122219.72+154359.7 , GALEXMSC J122254.88+154919.4 , GALEXMSC J122319.96+154913.0 , HDCE 0720 NED052, HIPASS J1222+15, HOLM 387A, HOLM 387D, HOLM 387E, HOLM 387F, IC 0783A, IC0783A, IRAS 12204+1605, IRAS F12203+1605, KUG 1220+160, LCSB L0513O, LDCE 0904 NED074, LGG 289:[G93] 057, M100, MAPS-NGP O_436_0212017, MCG +03-32-013, MCG +03-32-015, MCG +03-32-016, MCG +03-32-019, MESSIER 100, MESSIER 100-CH 1, MESSIER 100-CH 3, MESSIER 100-CH 4, MESSIER 100:[KA2008] 05, MESSIER 100:[KA2008] 14, MG1 J122256+1549, NGC 4321, NGC 4321:[K2001a] C1, NGC 4321:[L2011a] X0005, NGC 4321:[LB2005] X01, NGC 4321:[LM2005] ULX03, NGC 4321:[RW2000] X-02, NGC 4322, NGC 4323, NGC 4328, NGC 4328 CH01, NGC4322, NGC4323, NGC4328, NSA 141237, NSA 141252, NSA 141260, NSA 161630, NVGRC J122255.0+154921, NVSS J122255+154921, PGC 040068, PGC 040153, PGC 040171, PGC 040209, SDSS J122219.60+154400.8, SDSS J122219.61+154400.8, SDSS J122219.61+154400.9, SDSS J122241.89+155411.8, SDSS J122254.91+154920.2, SDSS J122301.72+155420.0, SDSS J122301.73+155420.0, SDSS J122301.73+155420.1, SDSS J122320.02+154913.2, SDSS J122320.02+154913.3, SDSS J122320.03+154913.3, SDSS J122320.03+154913.4, SSTSL2 J122241.87+155412.0, UGC 07450, UGC 07450 NOTES01, UITBOC 1712, USGC U490 NED288, USGC U490 NED292, UZC J122255.0+154922, UZC J122320.1+154914, VCC 0545, VCC 0596, VCC 0608, VCC 0634, WBL 401-001, WBL 401-002, WBL 401-003, [BEC2010] HRS 122, [GMM2009b] 40, [HRT2007] J122255+154906, [M98j] 174 NED62, [R83] 16deg017, [RHM2006] SFGs 027, [TH2002] 006, [TH2002] 040, [TH2002] 054, [TH2002] 080, [WB92] 1220+1605, | | 
