NGC 78

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NGC 78
NGC78 - SDSS DR14.jpg
SDSS image of NGC 78A (bottom right) and 78B (top left)
Observation data (J2000 epoch)
Constellation Pisces
Right ascension 00h 20m 27.482s [1]
Declination +00° 50′ 00.96″ [1]
Redshift 0.018283 [2]
Heliocentric radial velocity 5079 km/s [2]
Apparent magnitude  (B)14.5 [3]
Characteristics
Type SB0/a?(r) [2]
Size84,100  ly (25,790  pc) [2] [note 1]
Apparent size  (V)1.3′ × 0.897′ [2] [note 1]
Other designations
NGC 78A: UGC 193, MGC+00-02-004, PGC  1306 [3]
NGC 78B: UGC 194, MGC+00-02-005, PGC  1309 [4]

NGC 78 is a pair of galaxies in the constellation Pisces. [2] NGC 78A, which is the more southern galaxy, is a barred spiral galaxy. [2] NGC 78B, which is the more northern galaxy, is an elliptical galaxy. [4] Although the designations NGC 78A and 78B are used today, the designation NGC 78 was formerly used mainly for the northern galaxy. [5]

Contents

Discovery

NGC 78 was discovered no later than 1876 by Carl Frederick Pechüle. [5] It was described as "very faint, small, round" by John Louis Emil Dreyer, the compiler of the New General Catalogue. [5] Because the two galaxies have different recessional velocities, the two galaxies are most likely not interacting. [5]

References

  1. 1 2 Skrutskie, 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 . ISSN   0004-6256. S2CID   18913331.
  2. 1 2 3 4 5 6 7 "NED results for object NGC 0078A". National Aeronautics and Space Administration / Infrared Processing and Analysis Center . Retrieved 6 September 2017.
  3. 1 2 "NGC 78A". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 6 September 2017.
  4. 1 2 "NGC 78B". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 6 September 2017.
  5. 1 2 3 4 "New General Catalog Objects: NGC 50 - 99". cseligman.com. Retrieved 6 September 2017.

Notes

  1. 1 2 POSS1 103a-O values used.
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