NGC 739 | |
---|---|
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]
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 477 is a spiral galaxy in the constellation Andromeda. It is located approximately 250 million light-years from Earth and was discovered on October 18, 1786 by astronomer William Herschel.
NGC 482 is a spiral galaxy in the constellation Phoenix. It is located approximately 277 million light-years from Earth and was discovered on October 23, 1835 by astronomer John Herschel.
NGC 483 is a spiral galaxy in the constellation Pisces. It is located approximately 192 million light-years from Earth and was discovered on November 11, 1827 by astronomer John Herschel.
NGC 486, also occasionally referred to as LEDA 1281966 or GC 275, is a spiral galaxy in the constellation Pisces. NGC 486 was discovered on December 6, 1850 by Irish engineer Bindon Blood Stoney.
NGC 492, also occasionally referred to as PGC 4976 or GC 280, is a barred spiral galaxy in the constellation Pisces. It is located approximately 590 million light-years from Earth and was discovered on December 6, 1850 by Irish engineer Bindon Blood Stoney. Although John Dreyer, creator of the New General Catalogue, credits the discovery to astronomer William Parsons, 3rd Earl of Rosse, he notes that many of his claimed discoveries were made by one of his assistants. In the case of NGC 492, the discovery was made by Bindon Stoney, who discovered it along with NGC 486, NGC 490 and NGC 500 during his observation of NGC 488 using Lord Rosse's 72" telescope.
NGC 493, also occasionally referred to as PGC 4979 or GC 281, is a barred spiral galaxy in the constellation Cetus. It is located approximately 90 million light-years from Earth and was discovered on December 20, 1786 by astronomer William Herschel. It was later also observed by his son, John Herschel. John Dreyer, creator of the New General Catalogue, described the galaxy as "very faint, large, much extended 60°" with "a little brighter middle".
NGC 494, also occasionally referred to as PGC 5035 or GC 282, is a barred spiral galaxy in the constellation Pisces. It is located approximately 227 million light-years from Earth and was discovered on 22 November 1827 by astronomer John Herschel. John Dreyer, creator of the New General Catalogue, described the galaxy as "very faint, pretty large, extended, 3 faint stars to south".
NGC 684 is a spiral galaxy approximately 135 million light-years away from Earth in the constellation of Triangulum. It was discovered by William Herschel on October 26, 1786. Edward Swift, Lewis' son, found this galaxy again on 18 Jan 1890 while "searching for Swift's Comet." and it was reported as a new object in list IX-6.
NGC 725 is a spiral galaxy approximately 450 million light-years away from Earth in the constellation of Cetus. It was discovered by Francis Preserved Leavenworth on November 9, 1885 with the 26" refractor at the Leander McCormick Observatory.
NGC 805 is a lenticular galaxy approximately 194 million light-years away from Earth in the constellation of Triangulum. It was discovered by German astronomer Heinrich Louis d'Arrest on September 26, 1864, with the 11-inch refractor at Copenhagen.
NGC 806 is a spiral galaxy approximately 166 million light-years away from Earth in the constellation Cetus. It was discovered by American astronomer Lewis A. Swift on November 1, 1886 with the 16" refractor at Warner Observatory.
NGC 965 is a spiral galaxy approximately 294 million light-years away from Earth in the constellation of Cetus. It was discovered by American astronomer Ormond Stone in 1886 with the 26" refractor at Leander McCormick Observatory.
NGC 1019 is a barred spiral galaxy approximately 316 million light-years away from Earth in the constellation of Cetus. It was discovered by French astronomer Édouard Stephan on December 1, 1880 with the 31" reflecting telescope at the Marseille Observatory.
NGC 1189 is a barred spiral galaxy approximately 105 million light-years away from Earth in the constellation of Eridanus. It was discovered by American astronomer Francis Leavenworth on December 2, 1885 with the 26" refractor at Leander McCormick Observatory.
NGC 592 is an H II region type emission nebula located in the Triangulum galaxy (M33) and thus in the constellation of Triangulum. The nebula contains an open cluster of stars and is approximately 2.86 million light-years away from Earth.
NGC 1161 is a lenticular galaxy approximately 90 million light-years away from Earth in the constellation of Perseus. It was discovered, along with NGC 1160, by English astronomer William Herschel on October 7, 1784.
NGC 1160 is a spiral galaxy approximately 116 million light-years away from Earth in the constellation of Perseus. It was discovered, along with NGC 1161, by English astronomer William Herschel on October 7, 1784.
NGC 819 is a spiral galaxy approximately 302 million light-years away from Earth in the constellation of Triangulum. It forms a visual pair with the galaxy NGC 816 5.7' WNW.
NGC 750 is an elliptical galaxy approximately 225 million light-years away from Earth in the constellation of Triangulum. It forms a close pair of interacting galaxies together with the nearby NGC 751 galaxy. The pair is listed as Arp 166 in the Atlas of Peculiar Galaxies.
NGC 751 is an elliptical galaxy approximately 225 million light-years away from Earth in the constellation of Triangulum. It forms a close pair of interacting galaxies together with the nearby NGC 750 galaxy. The pair is listed as Arp 166 in the Atlas of Peculiar Galaxies.