NGC 739 is a spiral galaxy approximately 193 million light-years away from Earth in the constellation of Triangulum.[1][3]
Observational history
NGC 739 was discovered by English astronomer Ralph Copeland on January 9, 1874.[4] He was using the 72" telescope at Birr Castle in an observation of Arp 166, which is composed of two interacting galaxies NGC 750 and NGC 751.[4][5] Copeland reported the wrong direction of the newly observed galaxy, but gave the correct orientation as PA 292° (WNW) and separation 524" (8.7').[4] Because of his error the derived position was in error and this was copied into the NGC Catalogue.[4]
In 1913 American astronomer Heber Curtis noted there was nothing at that position and suggested MCG +05-05-030 was in fact NGC 739, based on Edward Crossley's photographs taken at Lick Observatory.[4]
See also
References
- ^ a b c d e "NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved March 7, 2019.
- ^ a b c d "Revised NGC Data for NGC 739". spider.seds.org. Retrieved March 7, 2019.
- ^ "NGC 739". Retrieved March 7, 2019.
- ^ a b c d e "Data for NGC 739". www.astronomy-mall.com. Retrieved March 7, 2019.
- ^ "Focal Pointe Observatory". bf-astro.com. Retrieved March 7, 2019.
External links
- NGC 739 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
- SEDS
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