NGC 739

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NGC 739
NGC739 - SDSS DR14.jpg
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]

Contents

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) NGC 0739 SDSS.jpg
NGC 739 (SDSS)

See also

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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.