Astronomy:NGC 7454
From HandWiki
| NGC 7454 | |
|---|---|
 SDSS image of NGC 7454 | |
| Observation data (J2000 epoch) | |
| Constellation | Pegasus[1] |
| Right ascension | 23h 01m 06.512s[2] |
| Declination | +16° 23′ 18.48″[2] |
| Redshift | 2,008 km/s[3] |
| Distance | 77.17 ± 0.46 Mly (23.66 ± 0.14 Mpc)[3] |
| Apparent magnitude (V) | 11.8[1] |
| Characteristics | |
| Type | E4[1] |
| Apparent size (V) | 2.1′ × 1.4′[1] |
| Other designations | |
| NGC 7454, UGC 12305[4] | |
NGC 7454 is an elliptical galaxy in the constellation Pegasus. It was discovered on October 15, 1784 by William Herschel.[5] This object has an apparent visual magnitude of 11.8, a visual size of 2.1′ × 1.4′,[1] and a morphological classification of E4.[1] J. L. E. Dreyer described the galaxy as F, cS, lE, lbM, *11 p 1', which indicates it is faint, considerably small, a little extended, with a little brighter middle, and an 11th magnitude star is located 1 arcmin to west.[6]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Aranda, Ted (2011). 3,000 Deep-Sky Objects, An Annotated Catalogue. Springer New York. p. 473. ISBN 9781441994196. https://books.google.com/books?id=gc9oXfN3xYAC&pg=PA473.
- ↑ 2.0 2.1 Gaia Collaboration (2020-11-01). "VizieR Online Data Catalog: Gaia EDR3 (Gaia Collaboration, 2020)". VizieR Online Data Catalog: I/350. doi:10.26093/cds/vizier.1350. Bibcode: 2020yCat.1350....0G. https://ui.adsabs.harvard.edu/abs/2020yCat.1350....0G.
- ↑ 3.0 3.1 Tully, R. Brent et al. (October 2013). "Cosmicflows-2: The Data". The Astronomical Journal 146 (4): 25. doi:10.1088/0004-6256/146/4/86. 86. Bibcode: 2013AJ....146...86T.
- ↑ "NGC 7454". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+7454.
- ↑ Seligman, Courtney. "Celestial Atlas". https://cseligman.com/text/atlas/ngc74a.htm#7454.
- ↑ Frommert, Hartmut. "NGC 7454". https://spider.seds.org/ngc/ngc.cgi?7454.
External links
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