Astronomy: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] |
| Helio 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
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
- ↑ 1.0 1.1 1.2 1.3 1.4 "NASA/IPAC Extragalactic Database". http://ned.ipac.caltech.edu/cgi-bin/objsearch?objname=NGC+739.
- ↑ 2.0 2.1 2.2 2.3 "Revised NGC Data for NGC 739". http://spider.seds.org/ngc/revngcic.cgi?NGC739.
- ↑ "NGC 739". http://simbad.u-strasbg.fr/simbad/sim-id?Ident=NGC%20739.
- ↑ 4.0 4.1 4.2 4.3 4.4 "Data for NGC 739". http://www.astronomy-mall.com/Adventures.In.Deep.Space/NGC%201%20-%20999%20(11-30-17).htm.
- ↑ "Focal Pointe Observatory". http://bf-astro.com/ngc750/arp166.htm.
External links
- NGC 739 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
- SEDS
Coordinates: 
01h 56m 54.70s, 33° 16′ 00.00″
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