Astronomy:NGC 684
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Short description: Spiral galaxy in the constellation Triangulum
| NGC 684 | |
|---|---|
 NGC 684 (SDSS) | |
| Observation data (J2000.0 epoch) | |
| Constellation | Triangulum |
| Right ascension | 01h 50m 14.02s [1] |
| Declination | +27° 38′ 44.4″ [1] |
| Redshift | 0.011791 [1] |
| Helio radial velocity | 3535 ± 1 km/s [1] |
| Distance | 135 Mly[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] |
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]
See also
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 "NASA/IPAC Extragalactic Database". http://ned.ipac.caltech.edu/cgi-bin/objsearch?objname=NGC+684.
- ↑ 2.0 2.1 "Revised NGC Data for NGC 684". http://spider.seds.org/ngc/revngcic.cgi?NGC684.
- ↑ 3.0 3.1 "Data for NGC 684". http://www.astronomy-mall.com/Adventures.In.Deep.Space/NGC%201%20-%20999%20(11-30-17).htm.
External links
- NGC 684 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
- SEDS
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