NGC 2804

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).^[1] It was discovered by British astronomer John Herschel on 24 February 1827.^[2] 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.^[2]

NGC 2804
The lenticular galaxy NGC 2804
Observation data (J2000 epoch)
Constellation	Cancer
Right ascension	09h 16m 50.0173s[1]
Declination	+20° 11′ 54.631″[1]
Redshift	0.027662[1]
Heliocentric radial velocity	8293 ± 3 km/s[1]
Distance	412.8 ± 28.9 Mly (126.55 ± 8.86 Mpc)[1]
Apparent magnitude (V)	12.8[1]
Characteristics
Type	S0[1]
Size	~226,100 ly (69.31 kpc) (estimated)[1]
Apparent size (V)	1.4′ × 1.2′[1]
Other designations
2MASX J09165000+2011548, IC 2455, UGC 4901, MCG +03-24-028, PGC 26196, CGCG 091-047[1]

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.^[3]

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.^[4]

See also

• List of NGC objects (2001–3000)