Astronomy:NGC 78
From HandWiki
Short description: A pair of spiral galaxies in the constellation Pisces
| NGC 78 | |
|---|---|
 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] |
| Helio radial velocity | 5079 km/s[2] |
| Apparent magnitude (B) | 14.5[3] |
| Characteristics | |
| Type | SB0/a?(r)[2] |
| Size | 84,100 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]
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
- ↑ 1.0 1.1 Skrutskie, Michael F.; Cutri, Roc M.; Stiening, Rae; Weinberg, Martin D.; Schneider, Stephen E.; Carpenter, John M.; Beichman, Charles A.; Capps, Richard W. et al. (1 February 2006). "The Two Micron All Sky Survey (2MASS)". The Astronomical Journal 131 (2): 1163–1183. doi:10.1086/498708. ISSN 0004-6256. Bibcode: 2006AJ....131.1163S. https://ui.adsabs.harvard.edu/abs/2006AJ....131.1163S/abstract.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 "NED results for object NGC 0078A". National Aeronautics and Space Administration / Infrared Processing and Analysis Center. http://nedwww.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=NGC+78A&extend=no&out_csys=Equatorial&out_equinox=J2000.0&obj_sort=RA+or+Longitude&of=pre_text&zv_breaker=30000.0&list_limit=5&img_stamp=YES.
- ↑ 3.0 3.1 "NGC 78A". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+78A.
- ↑ 4.0 4.1 "NGC 78B". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+78B.
- ↑ 5.0 5.1 5.2 5.3 "New General Catalog Objects: NGC 50 - 99". http://cseligman.com/text/atlas/ngc0a.htm#78.
Notes
External links
 |  |
