NGC 3532

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NGC 3532
Eso1439a.jpg
Observation data (J2000 epoch)
Constellation Carina
Right ascension 11h 05m 33s[1]
Declination −58° 43.8′[1]
Distance 1,321[2] ly (405 pc)
Physical characteristics
Other designations NGC 3532,[1] C 1104-584, Cl* 1104-584, CL 1104-584, Caldwell 91, Melotte 103,[3] Lacaille II.10,[3] Lac II.10, Football Cluster,[4] Wishing Well Cluster[5]
See also: Open cluster, List of open clusters

NGC 3532, also known as the Football Cluster,[4][6] and the Black Arrow Cluster,[7] is an open cluster in the constellation Carina, lies some 1,321[2] light years away. It consists of approximately 150 stars of 7th magnitude or fainter, including seven red giants[8] and seven white dwarfs.[9][10] On 20 May 1990 it became the first target ever observed by the Hubble Space Telescope. A line from Beta Crucis through Delta Crucis passes somewhat to the north of NCG 3532. The cluster lies between the constellation Crux and the larger but fainter "False Cross" asterism. The 4th-magnitude Cepheid variable star x Carinae (V382 Carinae) is the nearest naked-eye star, but it is not a member of the cluster. NGC 3532 lies near the Eta Carinae nebula (NGC 3372) and several other prominent open clusters like NGC 3293 and IC 2581.

The cluster was first catalogued by Nicolas Louis de Lacaille in 1751. It was admired by John Herschel, who thought it one of the finest irregular clusters in the sky,[3][11] with many double stars (binary stars).[5]

References[edit]

  1. ^ a b c "NGC 3532". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Retrieved 2010-05-23. 
  2. ^ a b Robichon, N. et al. (2005). "Open clusters with Hipparcos. I. Mean astrometric parameters". Astronomy and Astrophysics 345: 471–484. arXiv:astro-ph/9903131. Bibcode:1999A&A...345..471R. 
  3. ^ a b c Deep Sky Observer's Companion – the online database, DOCdb Lacaille II.10
  4. ^ a b Amateur Astronomer Association of New York, Nebula of the Month - Carina's Football
  5. ^ a b ScienceDaily, "A colorful gathering of middle-aged stars", European Southern Observatory, 26 November 2014
  6. ^ IceInSpace - Australian Amateur Astronomy, Challenge Objects - June 2005, 2005
  7. ^ Stephen Chadwick and Ian Cooper "Imaging the Southern Sky" Springer 2013, p.94
  8. ^ Claria, J.J., Lapasset, E., (1988) "A UBV and DDO astrophysical study of the open cluster NGC3532", Monthly Notices of the Royal Astronomical Society, 235, 1129-1139
  9. ^ Reimers, D., Koester, D., (1989) "Spectroscopic identification of white dwarfs in galactic clusters. V - NGC 3532", Astronomy & Astrophysics, 218, 118-122
  10. ^ Dobbie, P., Day-Jones, A., Williams, K., Casewell, S., Burleigh, M., Lodieu, N., Parker, Q., Baxter, R. (2012) "Further investigation of white dwarfs in the open clusters NGC2287 and NGC3532", Monthly Notices of the Royal Astronomical Society, 423, 2815-2828
  11. ^ Herschel, J. (1847). Results of Astronomical Observations Made During the Years 1834, 5, 6, 7, 8, at the Cape of Good Hope. London, Smith, Elder &Co. 
  • Ridpath, Ian & Tirion, Wil, Collins Guide to Stars & Planets, Collins, 2007
  • Bakich, Michael E. (editor), Hubble’s Greatest Pictures, Kalmbach, 2008

External links[edit]

Coordinates: Sky map 11h 05m 12s, −58° 44′ 1″