NGC 3689
Galaxy in the constellation Leo
From Wikipedia, the free encyclopedia
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]
| 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] | |
The SIMBAD database lists NGC 3689 as a radio galaxy.[3][4]
The SAGA Astronomical Survey for the search for satellite galaxies orbiting another galaxy confirmed the presence of two satellite galaxies for NGC 3689.[5]
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.[6]
