NGC 2804

NGC 2804
NGC 2804 imaged by Legacy Surveys
Observation data (J2000 epoch)
ConstellationCancer
Right ascension09h 16m 50.0173s
Declination+20° 11′ 54.631″
Redshift0.027662
Heliocentric radial velocity8293 ± 3 km/s
Distance412.8 ± 28.9 Mly (126.55 ± 8.86 Mpc)
Apparent magnitude (V)12.8
Characteristics
TypeS0
Size~226,100 ly (69.31 kpc) (estimated)
Apparent size (V)1.4′ × 1.2′
Other designations
2MASX J09165000+2011548, IC 2455, UGC 4901, MCG +03-24-028, PGC 26196, CGCG 091-047

NGC 2804 is a lenticular galaxy in the constellation of Cancer. Its velocity with respect to the cosmic microwave background is 8580 ± 20 km/s, which corresponds to a Hubble distance of 126.55 ± 8.86 Mpc (~413 million light-years). It was discovered by British astronomer John Herschel on 24 February 1827. This galaxy was also observed by the French astronomer Stéphane Javelle on 9 April 1896, and was later added to the Index Catalogue as IC 2455.

According to the SIMBAD database, NGC 2804 is a LINER galaxy, i.e. a galaxy whose nucleus has an emission spectrum characterized by broad lines of weakly ionized atoms.

One supernova has been observed in NGC 2804: SN 2023ftr (Type Ia, mag. 18.51) was discovered by the Zwicky Transient Facility on 16 April 2023.

See also

References

  1. 1 2 3 4 5 6 7 8 9 10 11 "Results for object NGC 2804". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 10 August 2024.
  2. 1 2 Seligman, Courtney. "NGC 2804". Celestial Atlas. Retrieved 10 August 2024.
  3. ↑ "NGC 2804". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 16 December 2024.
  4. ↑ "SN 2023ftr". Transient Name Server. IAU. Retrieved 16 December 2024.