Astronomy:NGC 7623
| NGC 7623 | |
|---|---|
 NGC 7623 as observed by the Sloan Digital Sky Survey | |
| Observation data (J2000 epoch) | |
| Constellation | Pegasus |
| Right ascension | 23h 20m 38.7s |
| Declination | +08° 13′ 54″ |
| Redshift | 0.011313 |
| Distance | ~160 million |
| Characteristics | |
| Type | S0 |
| Apparent size (V) | 2.2′ × 1.6′ |
| Other designations | |
| UGC 12498, PGC 71017 | |
NGC 7623 is a lenticular galaxy located in the constellation Pegasus. It was discovered on September 26, 1785, by the German-British astronomer William Herschel.[1]
The galaxy is situated at a distance of approximately 160 million light-years from the Milky Way, based on its redshift. NGC 7623 is classified as a lenticular (S0) galaxy, exhibiting structural characteristics intermediate between elliptical and spiral galaxies.
NGC 7623 is part of the Pegasus I Group, a nearby galaxy group composed primarily of early-type galaxies. It forms a close pair with the neighboring elliptical galaxy NGC 7626, and the two galaxies are frequently studied together in investigations of galaxy interactions and group dynamics.[2]
Multiwavelength observations, including optical and X-ray studies, suggest the presence of diffuse hot gas associated with the surrounding group environment, consistent with lenticular galaxies located in dense regions.[3]
NGC 7623 is catalogued in several major astronomical databases, including the New General Catalogue, the Uppsala General Catalogue (UGC 12498), and the Principal Galaxies Catalogue (PGC 71017).[4]
References
- ↑ "New General Catalog Objects: NGC 7600–7649". https://cseligman.com/text/atlas/ngc76.htm#7623.
- ↑ Huchra, John P. (1982). "Groups of galaxies. I – Nearby groups". Astrophysical Journal Supplement Series 48: 463–492. doi:10.1086/190785.
- ↑ O'Sullivan, E. (2001). "A catalogue and analysis of X-ray luminosities of early-type galaxies". Monthly Notices of the Royal Astronomical Society 328 (2): 461–484. doi:10.1046/j.1365-8711.2001.04890.x.
- ↑ "NASA/IPAC Extragalactic Database: NGC 7623". https://ned.ipac.caltech.edu/byname?objname=NGC%207623.
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