NGC 684
NGC 684 is a spiral galaxy approximately 135 million light-years away from Earth in the constellation of Triangulum. It was discovered by William Herschel on October 26, 1786. 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.
NGC 684 (SDSS)
One supernova has been observed in NGC 684: SN 2021ass (type II, mag. 18.1).
See also
References
- ^ "NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 4 December 2017.
- ^ "Revised NGC Data for NGC 684". spider.seds.org. Retrieved December 9, 2017.
- ^ "Data for NGC 684". www.astronomy-mall.com. Retrieved December 9, 2017.
- ^ "SN 2021ass". Transient Name Server. IAU. Retrieved 4 September 2024.
External links
Media related to NGC 684 at Wikimedia Commons- NGC 684 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
- SEDS
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