NGC 3689

NGC 3689
The intermediate spiral galaxy NGC 3689
Observation data (J2000 epoch)
Constellation	Leo
Right ascension	11h 28m 11.0446s[1]
Declination	+25° 39′ 39.943″[1]
Redshift	0.009130[1]
Heliocentric radial velocity	2737 ± 1 km/s[1]
Distance	146.7 ± 10.3 Mly (44.97 ± 3.16 Mpc)[1]
Apparent magnitude (V)	12.3[1]
Characteristics
Type	SAB(rs)c[1]
Size	~69,100 ly (21.20 kpc) (estimated)[1]
Apparent size (V)	1.7′ × 1.1′[1]
Other designations
2MASX J11281100+2539397, UGC 6467, MCG +04-27-037, PGC 35294, CGCG 126-057[1]

NGC 3689 is an intermediate spiral galaxy in the constellation of Leo. Its velocity with respect to the cosmic microwave background is 3049 ± 22 km/s, which corresponds to a Hubble distance of 44.97 ± 3.16 Mpc (∼147 million light-years).^[1] However, 16 non-redshift measurements give a closer distance of 39.350 ± 2.088 Mpc (∼128 million light-years).^[1] The galaxy was discovered by German-British astronomer William Herschel on 6 April 1785.^[2]

According to the SIMBAD database, NGC 3689 is a radio galaxy.^[3]

The SAGA Astronomical Survey for the search for satellite galaxies orbiting another galaxy confirmed the presence of two satellite galaxies for NGC 3689.^[4]

One calcium-rich supernova has been observed in NGC 3689: AT 2024mxe (type Gap, mag. 17.7) was discovered by GOTO on 26 June 2024.^[5]

• List of NGC objects (3001–4000)

• Media related to NGC 3689 at Wikimedia Commons
• NGC 3689 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images