NGC 4492 explained

NGC 4492
Epoch:J2000
Type:SA(s)a?[1]
Dist Ly:90,950,000 ly[2]
Z:0.005804/1740 km/s
Appmag V:13.0
Size V:1.58 x 1.25
Constellation Name:Virgo
Names:IC 3438, PGC 41383, UGC 7656, VCC 1330
Size:~33,450 ly (estimated)

NGC 4492 is a spiral galaxy[3] located about 90 million light-years away [4] in the constellation Virgo.[5] NGC 4492 was discovered by astronomer William Herschel on December 28, 1785. It was rediscovered by astronomer Arnold Schwassmann on January 23, 1900, and was listed as IC 3438.[6] NGC 4492 lies in the direction of the Virgo Cluster. However, it is not considered to be a member of that cluster.

Physical characteristics

NGC 4492 has a relatively large bulge while showing signs of weak spiral structure. The spiral arms are also outlined by lanes of interstellar dust.

Virgo Cluster membership

NGC 4492 is listed in the Virgo Cluster Catalog as VCC 1330.[7] However, distance estimates to the galaxy place it at a location far outside of the cluster's center. Also, its radial velocity indicates that NGC 4492 is not gravitationally bound to the Virgo Cluster but is expanding away from it. Therefore, NGC 4492 is not a member of the Virgo Cluster but rather a background galaxy.[8]

See also

Notes and References

  1. Web site: NASA/IPAC Extragalactic Database . Results for NGC 4492 . 2017-10-25.
  2. Web site: parsecs to lightyears conversion. 2017-09-30.
  3. Web site: Your NED Search Results. ned.ipac.caltech.edu. 2017-10-27.
  4. Carmen Toribio. M.. Solanes. Jose M.. 10 November 2009. H i DISTRIBUTION AND TULLY–FISHER DISTANCES OF GAS-POOR SPIRAL GALAXIES IN THE VIRGO CLUSTER REGION. The Astronomical Journal. 138. 6. 1957–1968. 10.1088/0004-6256/138/6/1957. 0909.3615. 2009AJ....138.1957T. 15207214.
  5. Web site: Galaxy NGC 4492 - Spiral Galaxy in Virgo Constellation · Deep Sky Objects Browser. Rojas. Sebastián García. DSO Browser. en. 2017-10-27.
  6. Web site: New General Catalog Objects: NGC 4450 - 4499. cseligman.com. en-US. 2017-10-27.
  7. Binggeli, B. . Sandage, A. . Tammann, G. A. . 1985 . Studies of the Virgo Cluster. II – A catalog of 2096 galaxies in the Virgo Cluster area . . 90 . 1681–1759 . 10.1086/113874. 1985AJ.....90.1681B.
  8. Sanchis. T.. Mamon. G. A.. Salvador-Solé. E.. Solanes. J. M.. 2004-05-01. The origin of H I-deficiency in galaxies on the outskirts of the Virgo cluster. Astronomy & Astrophysics. en. 418. 2. 393–411. 10.1051/0004-6361:20034158. 0004-6361. astro-ph/0401367. 2004A&A...418..393S. 18787428.

This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "NGC 4492".

Except where otherwise indicated, Everything.Explained.Today is © Copyright 2009-2024, A B Cryer, All Rights Reserved. Cookie policy.