Astronomy:NGC 7177
From HandWiki
| NGC 7177 | |
|---|---|
 NGC 7177 imaged by SDSS | |
| Observation data (J2000 epoch) | |
| Constellation | Pegasus |
| Right ascension | 22h 00m 41.2099s[1] |
| Declination | +17° 44′ 16.638″[1] |
| Redshift | 0.003833[1] |
| Helio radial velocity | 1,149±1 km/s[1] |
| Distance | 38.6 ± 2.9 Mly (11.82 ± 0.90 Mpc)[1] |
| Apparent magnitude (V) | 11.2[1] |
| Characteristics | |
| Type | SAB(r)b[1] |
| Size | ~88,100 ly (27.00 kpc) (estimated)[1] |
| Apparent size (V) | 3.2′ × 2.1′[1] |
| Other designations | |
| UGC 11872, MCG+03-56-003, PGC 67823[1] | |
NGC 7177 is a barred spiral galaxy in the constellation of Pegasus. Its velocity with respect to the cosmic microwave background is 801±24 km/s, which corresponds to a Hubble distance of 38.6 ± 2.9 Mly (11.82 ± 0.90 Mpc).[1] However, 12 non-redshift measurements give a much farther distance of 86.49 ± 10.33 Mly (26.517 ± 3.166 Mpc).[2] It was discovered by German-British astronomer William Herschel on 15 October 1784.[3]
The SIMBAD database lists NGC 7177 as a LINER galaxy, i.e. a galaxy whose nucleus has an emission spectrum characterized by broad lines of weakly ionized atoms.[4]
Supernovae
Two supernovae have been observed in NGC 7177:
- SN 1960L (type unknown, mag. 16) was discovered by Milton Humason on 14 August 1960.[5][6]
- SN 1976E (type unknown, mag. 16.5) was discovered by Justus R. Dunlap of the Corralitos Observatory at Northwestern University on 23 September 1976.[7][8]
See also
References
- ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 "Results for object NGC 7177". NASA and Caltech. https://ned.ipac.caltech.edu/byname?objname=NGC+7177.
- ↑ "Distance Results for NGC 7177". NASA. https://ned.ipac.caltech.edu/cgi-bin/nDistance?name=NGC+7177.
- ↑ Seligman, Courtney. "New General Catalogue Objects: NGC 7177". https://cseligman.com/text/atlas/ngc71a.htm#7177.
- ↑ "NGC 7177". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+7177.
- ↑ Humason, M. L.; Gomes, Alercio M.; Kearns, C. E. (1961). "The 1960 Palomar Supernova Search". Publications of the Astronomical Society of the Pacific 73 (432): 175. doi:10.1086/127650. Bibcode: 1961PASP...73..175H.
- ↑ "SN 1960L". IAU. https://www.wis-tns.org/object/1960L.
- ↑ Dunlap, J. R. (1976). "Supernova in NGC 7177". International Astronomical Union Circular (2991): 1. Bibcode: 1976IAUC.2991....1D. http://www.cbat.eps.harvard.edu/iauc/02900/02991.html#Item1.
- ↑ "SN 1976E". IAU. https://www.wis-tns.org/object/1976E.
External links
- NGC 7177 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
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