BETA ZEN
NGC 6925
Texto da Wikipédia (en), licença CC BY-SA. O BETARUBI mostra o verbete inteiro nesta página — a leitura não continua fora do site.
| NGC 6925 | |
|---|---|
 NGC 6925 imaged by Legacy Surveys | |
| Observation data (J2000 epoch) | |
| Constellation | Microscopium |
| Right ascension | 20h 34m 20.5638s[1] |
| Declination | −31° 58′ 50.965″[1] |
| Redshift | 0.009303±0.00000500[1] |
| Heliocentric radial velocity | 2,789±1 km/s[1] |
| Distance | 92.94 ± 2.66 ± 13.57 Mly (28.497 ± 0.817 ± 4.162 Mpc)[1] |
| Group or cluster | NGC 6925 group (LGG 437)[2] |
| Apparent magnitude (V) | 11.3[3] |
| Apparent magnitude (B) | 12.09[3] |
| Characteristics | |
| Type | SA(s)bc[1] |
| Size | ~163,600 ly (50.16 kpc) (estimated)[1] |
| Apparent size (V) | 3.100′ × 1.116′[3] |
| Other designations | |
| ESO 463- G 004, IRAS 20312-3209, 2MASX J20342056-3158512, IC 5015, MCG -05-48-022, PGC 64980[1] | |
NGC 6925 is an unbarred spiral galaxy in the constellation Microscopium. Its velocity with respect to the cosmic microwave background is 2,572±15 km/s, which corresponds to a Hubble distance of 123.7 ± 8.7 Mly (37.93 ± 2.66 Mpc).[1] However, 34 non-redshift measurements give a much closer mean distance of 92.94 ± 2.66 Mly (28.497 ± 0.817 Mpc).[4] It was discovered by British astronomer John Herschel on 31 July 1834.[5]
NGC 6925 is lens-shaped, as it lies almost edge on to observers on Earth. It lies 3.7 degrees west-northwest of Alpha Microscopii.[6]
NGC 6925 group
NGC 6925 is the main galaxy in a group of galaxies that bears its name. The NGC 6925 group (also known as LGG 437) has at least four galaxies, including NGC 6923, IC 5020 and ESO 462-31.[2][7]
Supernova
One supernova has been observed in NGC 6925. SN 2011ei (Type IIb, mag. 18) was discovered by Stuart Parker in New Zealand on 25 July 2011.[8][9][10]
References
- 1 2 3 4 5 6 7 8 9 "NED results for object NGC 6925". National Aeronautics and Space Administration / Infrared Processing and Analysis Center. Retrieved 13 February 2017.
- 1 2 Garcia, A. M. (1993). "General study of group membership. II. Determination of nearby groups". Astronomy and Astrophysics Supplement Series. 100: 47. Bibcode:1993A&AS..100...47G.
- 1 2 3 "NGC 6925". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 25 March 2015.
- ↑ "Distance Results for NGC 6925". NASA/IPAC Extragalactic Database. NASA. Retrieved 18 August 2026.
- ↑ Seligman, Courtney. "New General Catalogue Objects: NGC 6925". Celestial Atlas. Retrieved 18 August 2026.
- ↑ Bakich, Michael E. (2010). 1001 Celestial Wonders to See Before You Die: The Best Sky Objects for Star Gazers. Patrick Moore's Practical Astronomy Series. Springer. p. 289. ISBN 978-1-4419-1776-8.
- ↑ "LGG 437". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 18 August 2026.
- ↑ Marples, P.; Parker, S.; Stritzinger, M.; Drescher, C.; Bock, G. (2011). "Supernova 2011ei in NGC 6925 = PSN J20342262-3158236". Central Bureau Electronic Telegrams (2777): 1. Bibcode:2011CBET.2777....1M.
- ↑ "SN 2011ei". Transient Name Server. IAU. Retrieved 10 December 2025.
- ↑ Bishop, David. "Supernova 2011ei in NGC 6925". Rochester Astronomy. Archived from the original on 20 June 2015. Retrieved 20 June 2015.
