NGC 888
| NGC 888 | |
|---|---|
NGC 888 imaged by Legacy Surveys | |
| Observation data (J2000 epoch) | |
| Constellation | Horologium |
| Right ascension | 02h 17m 27.1s[1] |
| Declination | −59° 51′ 40″[1] |
| Redshift | 0.029190±0.000133[1] |
| Heliocentric radial velocity | 8,751±40 km/s[1] |
| Galactocentric velocity | 8662±40 km/s[1] |
| Distance | 416.7 ± 29.2 Mly (127.76 ± 8.96 Mpc)[1] |
| Apparent magnitude (V) | 13.0[2] |
| Apparent magnitude (B) | 14.0[2] |
| Surface brightness | 12.52[2] |
| Characteristics | |
| Type | E1? pec[1] · [2] E/S0?[3] E[4] |
| Apparent size (V) | 0.8′ × 0.8′[2] |
| Notable features | Flat-spectrum radio source[1] |
| Other designations | |
| PGC 8743 ESO 115-2 AM 0215-600[2] | |
NGC 888 is a large and relatively distant elliptical galaxy in the constellation Horologium. Its velocity relative to the cosmic microwave background is 8662±40 km/s, corresponding to a Hubble distance of 127.8±9.0 Mpc.[1] It was discovered by British astronomer John Herschel in 1834.[3]
Characteristics
A redshift-independent distance measurement gives 136.0 Mpc,[5] which is consistent within uncertainties with the Hubble distance.
NGC 888 is classified as a flat-spectrum radio galaxy.[1]
Galaxy pair
NGC 888 and ESO 115-003 form a galaxy pair.[6] The Hubble distance of ESO 115-003 is 134.65±9.45 Mpc.[7] Considering the uncertainties in the distances, it is possible that the two galaxies form a physical pair.
Supernova
One supernova has been observed in NGC 888:
References
- ^ a b c d e f g h i j "Results for object NGC 888". NASA/IPAC Extragalactic Database. Retrieved 20 June 2022.
- ^ a b c d e f "Revised NGC and IC Catalog by Wolfgang Steinicke, NGC 800–899". astrovalleyfield.com. Retrieved 6 January 2024.
- ^ a b Courtney Seligman. "Celestial Atlas – NGC 888". Retrieved 20 June 2022.
- ^ "NGC 888 on HyperLeda". Retrieved 10 December 2018.
- ^ "Your NED Search Results. Distance Results for NGC 888". NASA/IPAC Extragalactic Database. Retrieved 21 June 2022.
- ^ Soares, D. S. L.; de Souza, R. E.; de Carvalho, R. R.; Couto da Silva, T. C. (1995). "Southern binary galaxies. I. A sample of isolated pairs". Astronomy and Astrophysics Supplement. 110: 371. doi:10.48550/arXiv.astro-ph/9410092.
- ^ "Results for object ESO 115-G 003". NASA/IPAC Extragalactic Database. Retrieved 20 November 2023.
- ^ Shumkov, V.; Lipunov, V.; Buckley, D.; Podesta, R.; Levato, H.; Gorbovskoy, E.; Tyurina, N.; Balanutsa, P.; Kuznetsov, A.; Kornilov, V.; Kuvshinov, D.; Vladimirov, V.; Potter, S.; Kniazev, A.; Budnev, N.; Gress, O.; Ivanov, K.; Lopez, C.; Mallamaci, C.; Lopez, C.; Podesta, F.; Pogrosheva, T. (2016). "MASTER: Bright PSN in NGC 0888". The Astronomer's Telegram. 9396: 1. Bibcode:2016ATel.9396....1S.
- ^ "SN 2016frs". Transient Name Server. IAU. Retrieved 2 March 2026.