NGC 739
NGC 739 (SDSS)
Observation data (J2000.0 epoch)
ConstellationTriangulum
Right ascension01h 56m 54.70s [1]
Declination+33° 16′ 00.00″ [1]
Redshift0.015104 [1]
Heliocentric radial velocity4528 ± 34 km/s [1]
Distance193 Mly
Apparent magnitude (V)14.10 [2]
Apparent magnitude (B)15.00 [2]
Characteristics
TypeS0-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]

NGC 739 (SDSS)

See also

References

  1. 1 2 3 4 5 "NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved March 7, 2019.
  2. 1 2 3 4 "Revised NGC Data for NGC 739". spider.seds.org. Retrieved March 7, 2019.
  3. ↑ "NGC 739". Retrieved March 7, 2019.
  4. 1 2 3 4 5 "Data for NGC 739". www.astronomy-mall.com. Retrieved March 7, 2019.
  5. ↑ "Focal Pointe Observatory". bf-astro.com. Retrieved March 7, 2019.
Wikimedia Commons has media related to NGC 739.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.