NGC 2232 (taken from Stellarium)
|Observation data (J2000 epoch)|
|Right ascension||06h 27m 15s|
|Declination||–04° 45′ 30″|
|Distance||1,060 ly (325 pc)|
|Apparent magnitude (V)||3.9|
|Apparent dimensions (V)||30′ |
|Mass||< 100 M☉|
|Estimated age||30.9 Myr|
|Other designations||Cr 93, C 0624-047|
NGC 2232 is a bright open star cluster in the equatorial constellation of Monoceros, centered on the star 10 Monocerotis. It is located in the Gould Belt close to the Orion Nebula cluster, at a mean distance of 1,060 ly from the Sun. The average radial velocity of the cluster members is 26.6±0.77 km/s. This is one of the nearest open clusters to the Sun, which makes it a potentially useful target for studying young stars and their transition to the main sequence.
The cluster has an angular radius of 36′ and a core angular radius of 7.2′. It is a sparse cluster with twenty high–probability members. This is considered a super-solar cluster, with the components generally having a higher abundance of iron compared to the Sun. The mean metallicity is 0.22±0.09 or 0.32±0.08, depending on what assumptions are made. At least four cluster members display an infrared excess at a wavelength of 8μm that is suggestive of warm dust, while the A-type star HD 45435 displays a strong excess at 24μm. The latter may indicate the star is in an early evolutionary state. Only one member of the cluster appears to be chemically peculiar.
- Wu, Zhen-Yu et al. (November 2009), "The orbits of open clusters in the Galaxy", Monthly Notices of the Royal Astronomical Society 399 (4): 2146–2164, doi:10.1111/j.1365-2966.2009.15416.x, Bibcode: 2009MNRAS.399.2146W.
- Kharchenko, N. V. et al. (2005), "Astrophysical parameters of Galactic open clusters", Astronomy and Astrophysics 438 (3): 1163, doi:10.1051/0004-6361:20042523, Bibcode: 2005A&A...438.1163K.
- Dunlop, Storm (2005). Atlas of the Night Sky. Collins. ISBN 978-0-00-717223-8. https://archive.org/details/collinsatlasofni0000dunl.
- Finlay, Warren H. (2014), Concise Catalog of Deep-sky Objects, The Patrick Moore Practical Astronomy Series (2nd ed.), Springer Science & Business Media, p. 188, ISBN 978-3-319-03169-9.
- "NGC 2232". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+2232.
- Currie, Thayne et al. (November 2008), "A Spitzer Study of Debris Disks in the Young Nearby Cluster NGC 2232: Icy Planets Are Common around ~1.5-3 M☉ Stars", The Astrophysical Journal 688 (1): 597–615, doi:10.1086/591842, Bibcode: 2008ApJ...688..597C.
- Monroe, TalaWanda R.; Pilachowski, Catherine A. (December 2010), "Metallicities of Young Open Clusters. I. NGC 7160 and NGC 2232", The Astronomical Journal 140 (6): 2109–2123, doi:10.1088/0004-6256/140/6/2109, Bibcode: 2010AJ....140.2109M.
- Orban, Chris; Patten, Brian (January 1, 2004), Late-Type Membership of the Open Cluster NGC 2232, Greenbelt, MD, United States: NASA Goddard Space Flight Center, https://ntrs.nasa.gov/search.jsp?R=20040082212, retrieved 2020-04-13.
- Jenkner, H.; Maitzen, H. M. (November 1987), "Photoelectric search for CP2-stars in open clusters. X. NGC 2232, NGC2343, CR 140, and TR 10.", Astronomy and Astrophysics, Supplemental Series 71: 255–261, Bibcode: 1987A&AS...71..255J.
Original source: https://en.wikipedia.org/wiki/ NGC 2232. Read more