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NGC 7808

NGC 7808
The lenticular galaxy NGC 7808
Observation data (J2000 epoch)
ConstellationCetus
Right ascension00h 03m 32.1264s[1]
Declination−10° 44′ 40.833″[1]
Redshift0.029570 [1]
Heliocentric radial velocity8865 ± 2 km/s[1]
Distance409.9 ± 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

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

References

  1. ^ 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.
  2. ^ Seligman, Courtney. "New General Catalogue Objects: NGC 7808". Celestial Atlas. Retrieved 15 December 2024.
  3. ^ 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.
  4. ^ "SN 2023qnz". Transient Name Server. IAU. Retrieved 15 December 2024.
  5. ^ 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.
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