NGC 634 is a
spiral galaxy, lying at a distance of 217.1
megalight-years[3] away from the
Milky Way in the northern
constellation of
Triangulum. This object was discovered in the nineteenth century by French astronomer
Édouard Stephan.[7] It is inclined by an angle of 82.4° to the line of sight from the Earth, and thus is being viewed nearly edge on.[5]
Supernova SN 2006Q was reported 2.5
″ east and 1.0″ north of the galactic core in NGC 634, January 24, 2006. This was most likely a
type II supernova[5] and reached magnitude 18.74.[8] Another supernova explosion was reported near the galaxy on January 2, 2008. It was positioned 16.6
arcseconds west and 20.2 arcseconds north of the
Galactic Center and was designated SN 2008A. This event reached a peak magnitude of 16.7 on January 3,[9] and was determined to be a
type Iax supernova.[5]
References
^
abSkrutskie, Michael F.; Cutri, Roc M.; Stiening, Rae; Weinberg, Martin D.; Schneider, Stephen E.; Carpenter, John M.; Beichman, Charles A.; Capps, Richard W.; Chester, Thomas; Elias, Jonathan H.; Huchra, John P.; Liebert, James W.; Lonsdale, Carol J.; Monet, David G.; Price, Stephan; Seitzer, Patrick; Jarrett, Thomas H.; Kirkpatrick, J. Davy; Gizis, John E.; Howard, Elizabeth V.; Evans, Tracey E.; Fowler, John W.; Fullmer, Linda; Hurt, Robert L.; Light, Robert M.; Kopan, Eugene L.; Marsh, Kenneth A.; McCallon, Howard L.; Tam, Robert; Van Dyk, Schuyler D.; Wheelock, Sherry L. (1 February 2006).
"The Two Micron All Sky Survey (2MASS)". The Astronomical Journal. 131 (2): 1163–1183.
Bibcode:
2006AJ....131.1163S.
doi:10.1086/498708.
ISSN0004-6256.
S2CID18913331.
^
abcCrook, Aidan C.; Huchra, John P.; Martimbeau, Nathalie; Masters, Karen L.; Jarrett, Tom; Macri, Lucas M. (February 2007). "Groups of Galaxies in the Two Micron All Sky Redshift Survey". The Astrophysical Journal. 655 (2): 790–813.
arXiv:astro-ph/0610732.
Bibcode:
2007ApJ...655..790C.
doi:
10.1086/510201.
S2CID11672751.
^Li, W.; et al. (January 2006). Green, D. W. E. (ed.). "Supernovae 2006Q, 2006R, 2006S". IAU Circular. 8664: 2.
Bibcode:
2006IAUC.8664....2L.
^Nakano, S.; et al. (January 2008). Green, D. W. E. (ed.). "Supernova 2008A in NGC 634". Central Bureau Electronic Telegrams. 1193: 1.
Bibcode:
2008CBET.1193....1N.