NGC 6919
| NGC 6919 | |
|---|---|
NGC 6919 imaged by Legacy Surveys | |
| Observation data (J2000 epoch) | |
| Constellation | Microscopium |
| Right ascension | 20h 31m 38.0818s[1] |
| Declination | −44° 12′ 58.881″[1] |
| Redshift | 0.022109±0.0000270[1] |
| Heliocentric radial velocity | 6,628±8 km/s[1] |
| Distance | 246.36 ± 8.67 Mly (75.533 ± 2.658 Mpc)[1] |
| Group or cluster | [CHM2007] LDC 1408 |
| Apparent magnitude (V) | 13.58[1] |
| Characteristics | |
| Type | SAB(s)c[1] |
| Size | ~150,500 ly (46.14 kpc) (estimated)[1] |
| Apparent size (V) | 1.7′ × 1.2′[1] |
| Other designations | |
| ESO 285- G 027, IRAS 20282-4423, 2MASX J20313813-4412592, MCG -07-42-011, PGC 64883[1] | |
NGC 6919 is an intermediate spiral galaxy in the constellation of Microscopium. Its velocity with respect to the cosmic microwave background is 6,458±14 km/s, which corresponds to a Hubble distance of 310.7 ± 21.8 Mly (95.25 ± 6.67 Mpc).[1] However, 12 non-redshift measurements give a closer mean distance of 246.36 ± 8.67 Mly (75.533 ± 2.658 Mpc).[2] It was discovered by British astronomer John Herschel on 2 September 1836.[3]
NGC 6919 has a possible active galactic nucleus, i.e. it has a compact region at the center of a galaxy that emits a significant amount of energy across the electromagnetic spectrum, with characteristics indicating that this luminosity is not produced by the stars.[4][5]
LDC 1408 Group
NGC 6919 is a member of a small group of galaxies known as [CHM2007] LDC 1408. The other four galaxies in the group are ESO 285-31, ESO 285-32, ESO 285-40, and ESO 285-42.[6][7]
Supernova
One supernova has been observed in NGC 6919:
See also
References
- ^ a b c d e f g h i j k "Results for object NGC 6919". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 10 December 2025.
- ^ "Distance Results for NGC 6919". NASA/IPAC Extragalactic Database. NASA. Retrieved 10 December 2025.
- ^ Seligman, Courtney. "New General Catalogue Objects: NGC 6919". Celestial Atlas. Retrieved 10 December 2025.
- ^ Asmus, D.; Greenwell, C. L.; Gandhi, P.; Boorman, P. G.; Aird, J.; Alexander, D. M.; Assef, R. J.; Baldi, R. D.; Davies, R. I.; Hönig, S. F.; Ricci, C.; Rosario, D. J.; Salvato, M.; Shankar, F.; Stern, D. (2020). "Local AGN survey (LASr): I. Galaxy sample, infrared colour selection, and predictions for AGN within 100 MPC". Monthly Notices of the Royal Astronomical Society. 494 (2): 1784. arXiv:2003.05959. Bibcode:2020MNRAS.494.1784A. doi:10.1093/mnras/staa766.
- ^ "NGC 6919". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 10 December 2025.
- ^ "[CHM2007] LDC 1408". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 10 December 2025.
- ^ Crook, Aidan C.; Huchra, John P.; Martimbeau, Nathalie; Masters, Karen L.; Jarrett, Tom; Macri, Lucas M. (2007). "Groups of Galaxies in the Two Micron All Sky Redshift Survey". The Astrophysical Journal. 655 (2): 790–813. arXiv:astro-ph/0610732. Bibcode:2007ApJ...655..790C. doi:10.1086/510201.
- ^ "SN 2025ezt". Transient Name Server. IAU. Retrieved 10 December 2025.
External links
- Media related to NGC 6919 at Wikimedia Commons
- NGC 6919 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images