NGC 7647
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| NGC 7647 | |
|---|---|
 | |
| Observation data (J2000 epoch) | |
| Constellation | Pegasus |
| Right ascension | 23h 23m 57.4331s[1] |
| Declination | +16° 46′ 38.122″[1] |
| Redshift | 0.041091[1] |
| Heliocentric radial velocity | 12,319 km/s[1] |
| Distance | 575 Mly |
| Characteristics | |
| Type | cD;E;BrCIG[1] |
| Size | ~315,400 ly (96.70 kpc) (estimated)[1] |
| Other designations | |
| Abell 2589 [ZAC2011] BCG, GIN 681, PGC 71325, CGCG 0454-063, MCG +03-59-055, PGC 71335[1] | |
References: [2] | |
NGC 7647 is a giant elliptical galaxy of type cD located in the constellation Pegasus. The redshift of the galaxy is (z) 0.041[1] and it was discovered by German-British astronomer William Herschel on 29 November 1785.[3]
Supernovae
[edit]Two supernovae have been observed in NGC 7647:
- SN 2009hi (Type Ia, mag. 18.0) was discovered by Kōichi Itagaki, and independently by the Lick Observatory Supernova Search (LOSS), on 10 July 2009.[4][5]
- SN 2026abud (Type Ia, mag. 20.1) was discovered by GOTO on 14 September 2026.[6]
References
[edit]- 1 2 3 4 5 6 7 8 "NED Search results for NGC 7647". NASA/IPAC Extragalactic Database. Retrieved 2025-12-29.
- ↑ "NGC 7647 - Elliptical Galaxy in Pegasus". Retrieved 29 December 2025.
- ↑ "New General Catalog Objects: NGC 7600 - 7649". Retrieved 29 December 2025.
- ↑ Nakano, S.; Itagaki, K.; Li, W.; Cenko, S. B.; Filippenko, A. V. (2009). "Supernova 2009hi in NGC 7647". Central Bureau Electronic Telegrams (1872): 1. Bibcode:2009CBET.1872....1N.
- ↑ "SN 2009hi". Transient Name Server. IAU. Retrieved 5 March 2026.
- ↑ "SN 2026abud". Transient Name Server. IAU. Retrieved 23 September 2026.
| Morphology | |
|---|---|
| Structure | |
| Active nuclei | |
| Energetic galaxies | |
| Low activity | |
| Interaction | |
| Lists | |
| Related |
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