NGC 739
| NGC 739 | |
|---|---|
 NGC 739 (SDSS) | |
| Observation data (J2000.0 epoch) | |
| Constellation | Triangulum |
| Right ascension | 01h 56m 54.70s [1] |
| Declination | +33° 16′ 00.00″ [1] |
| Redshift | 0.015104 [1] |
| Heliocentric radial velocity | 4528 ± 34 km/s [1] |
| Distance | 193 Mly |
| Apparent magnitude (V) | 14.10 [2] |
| Apparent magnitude (B) | 15.00 [2] |
| Characteristics | |
| Type | S0-a [2] |
| Apparent size (V) | 0.9 x 0.6 [2] |
| Other designations | |
| PGC 7312, MCG +05-05-030 | |
NGC 739 is a spiral galaxy approximately 193 million light-years away from Earth in the constellation of Triangulum.[1][3]
Observational history
[edit]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
[edit]References
[edit]- ^ 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
[edit]
- NGC 739 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
- SEDS
