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NGC 2281
NGC 2281 (taken from Stellarium) Credit: Roberto Mura
Observation data (J2000 epoch)
Right ascension	06 48 17.(0)
Declination	+41° 04′ 4(2)″
Distance	1,722+104 −91 ly (528+32 −28 pc)
Apparent magnitude (V)	5.4
Apparent dimensions (V)	25′
Physical characteristics
Estimated age	610 million
Other designations	Cr 116, Mel 51, C0645+411, OCL-446
Associations
Constellation	Auriga
See also: Open cluster, List of open clusters

NGC 2281, also known as the Broken Heart Cluster, is an open cluster of stars in the northern constellation of Auriga. It was discovered by English astronomer William Herschel on March 4, 1788, and described as a, "cluster of coarsely scattered pretty stars, pretty rich". The Trumpler class for NGC 2281 is I3p, indicating a poor (p) but compact (I) grouping with a wide range of brightness (3). It is located at a distance of approximately 1,720 ly from the Sun and is 630–661 million years old.

References

1. ^ 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, arXiv:0909.3737, Bibcode:2009MNRAS.399.2146W, doi:10.1111/j.1365-2966.2009.15416.x, S2CID 6066790.
2. ^ Terrell, Dirk; et al. (January 2021), "Analysis of the Open Cluster NGC 2281", Galaxies, 9 (1): 7, Bibcode:2021Galax...9....7T, doi:10.3390/galaxies9010007.
3. ^ O'Meara, Steve (2007), Herschel 400 Observing Guide, Cambridge University Press, pp. 25–26, ISBN 978-0521858939.
4. Kharchenko, N. V.; et al. (2013), "Global survey of star clusters in the Milky Way. II. The catalogue of basic parameters", Astronomy & Astrophysics, 558: A53, arXiv:1308.5822, Bibcode:2013A&A...558A..53K, doi:10.1051/0004-6361/201322302, S2CID 118548517.
5. "NGC 2281". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-12-15.
6. Stoyan, Ronald; Schurig, Stephan (2014). interstellarum Deep Sky Atlas. Erlangen: Cambridge University Press; Oculum-Verlag GmbH. ISBN 978-1-107-50338-0. OCLC 920437579.
7. O'Meara, Stephen James (June 30, 2011), Deep-Sky Companions: The Secret Deep, Cambridge University Press, p. 134, ISBN 9780521198769.
8. Vasilevskis, S.; Balz, A. G. A. (1959), "Relative proper motions of stars in the region of the open cluster NGC 2281", The Astrophysical Journal, 64: 170–174, Bibcode:1959AJ.....64..170V, doi:10.1086/107917.

External links

• Media related to NGC 2281 at Wikimedia Commons
• Image NGC 2281
• NGC 2281
• NGC 2281 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images

v t e Constellation of Auriga
Auriga in Chinese astronomy List of stars in Auriga
Stars	Bayer α (Capella) β (Menkalinan) γ (Elnath) δ ε (Almaaz) ζ (Saclateni) η (Haedus) θ (Mahasim) ι (Hassaleh) κ λ (Alhurr) μ ν ξ ο π ρ σ τ υ φ χ ψ ψ ψ ψ ψ ψ ψ ψ ψ ω Flamsteed 2 5 6 9 12 14 16 18 19 22 26 28 36 38 39 40 41 42 43 45 47 49 51 53 54 59 60 62 63 64 65 66 35 Cam Variable R T RT (48) RW SU UU WW AB AE AR (17) EO IQ IU LY MZ NO NY PU QZ V352 V361 V394 V420 V433 V538 HR 1558 1615 1738 1752 1794 1795 1822 1825 1866 1884 1938 1945 2028 2096 2137 HD 33203 33463 35619 43691 45350 (Lucilinburhuc) 49674 (Nervia) Other Gliese 268 HAT-P-9 (Tevel) KELT-2 MWC 480 SGR 0501+4516 UGPS J0521+3640 WASP-12
Exoplanets HAT-P-9b (Alef) HD 40979 b HD 43691 b HD 45350 b HD 49674 b KELT-2Ab WASP-12b
Star clusters	NGC 1664 1893 1907 1931 2240 2281 Other Messier 36 Messier 37 Messier 38 Palomar 2
Nebulae	NGC 1985 2242 Other IC 405 IC 2149 Westbrook Nebula
Galaxies 3C 147 4C +41.17 DA 193 MCG +08-11-011
Galaxy clusters MACS J0717.5+3745
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