Astronomy:NGC 2266

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NGC 2266
SDSS (Sloan Digital Sky Survey) image
Observation data (J2000 epoch)
ConstellationGemini
Right ascension 06h 43m 19.7s[1]
Declination+26° 58′ 34″[1]
Distance10,603 ly (3,251.0 pc)[2]
Apparent magnitude (V)9.5[3]
Apparent dimensions (V)5.0′[3]
Physical characteristics
Radius16.1 ly
Estimated age81.2 Myr[2]
Other designationsNGC 2266, Cr 113, Mel 50, Lund 250[4]
See also: Open cluster, List of open clusters

NGC 2266 is an open cluster[5] of stars in the constellation of Gemini. It was discovered by German-British astronomer William Herschel on 7 December 1785.[6] This is a relatively dim cluster with an integrated visual magnitude of 9.5 and an angular size of 5.0′. The stellar members can be readily resolved with an amateur telescope.[3] NGC 2266 is located at a distance of 10,603 ly (3,251.0 pc) from the Sun.[2] It is located close to the opposite part of the sky from the Galactic Center, or the anti-center.[7]

This is a rich cluster that is well condensed.[8] It is of intermediate age; similar to the ages of the Hyades and Praesepe clusters. However, it has a lower metallicity than either cluster.[7] NGC 2266 has a heliocentric radial velocity of −16±15 km/s.[9] A 2008 study found 12 variable stars in the field of this cluster, although they lie outside the cluster radius.[8] A single candidate blue straggler has been identified.[10]

References

  1. ↑ 1.0 1.1 Tarricq, Y. et al. (March 2021). "3D kinematics and age distribution of the open cluster population". Astronomy & Astrophysics 647: id. A19. doi:10.1051/0004-6361/202039388. Bibcode: 2021A&A...647A..19T. 
  2. ↑ 2.0 2.1 2.2 Poggio, E. et al. (2021). "Galactic spiral structure revealed by Gaia EDR3". Astronomy and Astrophysics 651: A104. doi:10.1051/0004-6361/202140687. Bibcode: 2021A&A...651A.104P. 
  3. ↑ 3.0 3.1 3.2 O'Meara, Stephen James (2007). Herschel 400 Observing Guide. Cambridge University Press. p. 72. ISBN 9780521858939. https://books.google.com/books?id=Nyh9fAC_tpIC&pg=PA72. 
  4. ↑ "NGC 2266". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+2266. 
  5. ↑ "Open cluster NGC 2266". WEBDA, A site Devoted to Stellar Clusters in the Galaxy and the Magellanic Clouds. University of Vienna. http://www.univie.ac.at/webda/cgi-bin/ocl_page.cgi?cluster=NGC+2266. 
  6. ↑ Seligman, Courtney. "NGC Objects: NGC 2250 - 2299". http://cseligman.com/text/atlas/ngc22a.htm#2266. 
  7. ↑ 7.0 7.1 Kaluzny, Janusz; Mazur, Beata (1991). "The Hyades age anticenter cluster NGC 2266". Acta Astronautica 41: 191–212. Bibcode: 1991AcA....41..191K. 
  8. ↑ 8.0 8.1 Maciejewski, G. et al. (2008). "Photometric Study of Open Clusters NGC 2266 and NGC 7762". Baltic Astronomy 17: 51–65. Bibcode: 2008BaltA..17...51M. 
  9. ↑ Carrera, R. (August 2012). "Radial velocities and metallicities from infrared Ca II triplet spectroscopy of open clusters Berkeley 26, Berkeley 70, NGC 1798, and NGC 2266". Astronomy & Astrophysics 544: id. A109. doi:10.1051/0004-6361/201219625. Bibcode: 2012A&A...544A.109C. 
  10. ↑ Rain, M. J. et al. (June 2021). "A new, Gaia-based, catalogue of blue straggler stars in open clusters". Astronomy & Astrophysics 650: id. A67. doi:10.1051/0004-6361/202040072. Bibcode: 2021A&A...650A..67R. 

Template:NGC objects:2000-2499

Coordinates: Sky map 06h 43m 18.2s, 26° 58′ 10″



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