NGC 684 | |
---|---|
Observation data ( J2000.0 epoch) | |
Constellation | Triangulum |
Right ascension | 01h 50m 14.02s [1] |
Declination | +27° 38′ 44.4″ [1] |
Redshift | 0.011791 [1] |
Heliocentric radial velocity | 3535 ± 1 km/s [1] |
Distance | 135 M ly [1] |
Apparent magnitude (V) | 12.50 [2] |
Apparent magnitude (B) | 13.30 [2] |
Characteristics | |
Type | Sb |
Apparent size (V) | 3.2 x 0.6 [1] |
Other designations | |
IC 165, MCG +4-5-17, PGC 6759 |
NGC 684 is a spiral galaxy approximately 135 million light-years away from Earth in the constellation of Triangulum. [1] It was discovered by William Herschel on October 26, 1786. [3] Edward Swift, Lewis' son, found this galaxy again on 18 Jan 1890 while "searching for Swift's Comet." and it was reported as a new object in list IX-6. [3]