NGC 3370

NGC 3370 (also known as UGC 5887 or Silverado Galaxy[2]) is a spiral galaxy about 82.2 ± 5.9 million light-years (25.2 ± 1.8 megaparsecs) away in the constellation Leo. It is nearly comparable to our Milky Way both in diameter with a D25 isophotal size about 77,300 ly (23.69 kpc) comparing to the Milky Way Galaxy's 87,400 ly (26.8 kpc) diameter, and as well as in mass (1011 M☉). NGC 3370 exhibits an intricate spiral arm structure surrounding a poorly defined nucleus. It is a member of the NGC 3370 Group of galaxies, which is a member of the Leo II Groups, a series of galaxies and galaxy clusters strung out from the right edge of the Virgo Supercluster.[3]

NGC 3370
Hubble Space Telescope image of spiral galaxy NGC 3370.
Credit: NASA/ESA
Observation data (J2000 epoch)
ConstellationLeo
Right ascension10h 47m 04.0s[1]
Declination+17° 16′ 25″[1]
Heliocentric radial velocity1279 ± 4 km/s[1]
Distance78 Mly (23.91 Mpc)h−1
0.6774
(Light-travel)
Group or clusterNGC 3370 Group
Apparent magnitude (V)12.3[1]
Characteristics
TypeSA(s)c[1] III
Size49,930 to 77,270 ly
(15.31 to 23.69 kpc)
(diameter; 2MASS K-band total and D25.0 B-band isophotes)[1]
Apparent size (V)3.2′ × 1.8′[1]
Notable featuresDusty
Other designations
Silverado Galaxy, UGC 5887, PGC 32207

History

NGC 3370 was likely discovered by William Herschel, who provided it with the designation II 81.[4] His son John later designated it 750. William Herschel cataloged I 80 to NGC 3348[4] before and II 82 to NGC 3455 after NGC 3370.[4]

The object has a surface brightness of 13 and a position angle (PA) of 140°.

On November 14, 1994, S. Van Dyk and the Leuschner Observatory Supernova Search discovered a supernova in NGC 3370 at 10h 44m 21.52s +17° 32′ 20.7″, designated SN 1994ae.[5] SN 1994ae was a type Ia supernova, and one of the nearest and best observed since the advent of modern digital detectors.[6] The maximal light of the supernova was estimated to have occurred between November 30 and December 1, peaking at visual magnitude 13.[5]

See also

References
  1. "NASA/IPAC Extragalactic Database". Results for NGC 3370. Retrieved 2006-11-25.
  2. Sparrow, Giles (2006). Cosmos. Booksales. ISBN 978-1-905204-29-8.
  3. "The Leo III Groups". Atlas of the Universe. Archived from the original on July 22, 2012. Retrieved 2010-11-27.
  4. William Herschel's Deepsky Objects (The Herschel 2500 list)
  5. A Look at NGC 3370 in Detail
  6. "Celestial Composition". Hubble Space Telescope. ESA/Hubble. Archived from the original on 6 July 2015. Retrieved 6 July 2015.
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