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| NGC 7808 | |
|---|---|
 The lenticular galaxy NGC 7808 | |
| Observation data (J2000 epoch) | |
| Constellation | Cetus |
| Right ascension | 00h 03m 32.1264s[1] |
| Declination | −10° 44′ 40.833″[1] |
| Redshift | 0.029570 [1] |
| Heliocentric radial velocity | 8865 ± 2 km/s[1] |
| Distance | 409.9 ± 28.7 Mly (125.67 ± 8.80 Mpc)[1] |
| Apparent magnitude (V) | 12.8[1] |
| Characteristics | |
| Type | (R')SA0^0?[1] |
| Size | ~158,900 ly (48.71 kpc) (estimated)[1] |
| Apparent size (V) | 1.3′ × 1.3′[1] |
| Other designations | |
| IRAS F00009-1101, 2MASX J00033214-1044403, MCG -02-01-013, PGC 243[1] | |
NGC 7808 is an lenticular galaxy in the constellation of Cetus. Its velocity with respect to the cosmic microwave background is 8521 ± 24 km/s, which corresponds to a Hubble distance of 125.67 ± 8.80 Mpc (∼410 million light-years).[1] It was discovered by American astronomer Frank Muller in 1886.[2]
NGC 7808 is an active Seyfert 1 galaxy.[1][3]
One supernova has been observed in NGC 7808: SN 2023qnz (type Ia, mag 20.14) was discovered by Pan-STARRS on 22 August 2023.[4]
Star-forming ring
[edit]NGC 7808 contains an outer star-forming ring, observed in ultraviolet rays. According to a 2019 study, the star formation is only above one solar mass per year. It is expected to decrease overtime. Nevertheless, star-forming rings like in NGC 7808 still contain enigmatic features and can help astronomers to learn more about the evolutionary processes taken by these galaxies.[5]
See also
[edit]References
[edit]- ^ a b c d e f g h i j k l "Results for object NGC 7808". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 5 August 2024.
- ^ Seligman, Courtney. "New General Catalogue Objects: NGC 7808". Celestial Atlas. Retrieved 15 December 2024.
- ^ Maia, Marcio A. G.; Machado, Rodolfo S.; Willmer, Christopher N. A. (1 October 2003). "The Seyfert Population in the Local Universe". The Astronomical Journal. 126 (4): 1750–1762. arXiv:astro-ph/0307180. Bibcode:2003AJ....126.1750M. doi:10.1086/378360. ISSN 0004-6256.
- ^ "SN 2023qnz". Transient Name Server. IAU. Retrieved 15 December 2024.
- ^ Proshina, Irina S.; Kniazev, Alexei Yu.; Sil'chenko, Olga K. (1 July 2019). "Star-forming Rings in Lenticular Galaxies: Origin of the Gas". The Astronomical Journal. 158 (1): 5. arXiv:1905.05517. Bibcode:2019AJ....158....5P. doi:10.3847/1538-3881/ab1d54. ISSN 0004-6256.
External links
[edit]
Media related to NGC 7808 at Wikimedia Commons- NGC 7808 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
