NGC 7789

NGC 7789
NGC 7789
	NGC 7789 taken with an amateur telescope
Observation data (J2000.0 epoch)
Right ascension	23h 57m 24s
Declination	+56° 42′ 30″
Distance	7.6 kly (2,337)
Apparent magnitude (V)	6.7
Apparent dimensions (V)	16′
Physical characteristics
Mass	6,620.4 ± 762.5 M☉
Estimated age	1.7 GYr
Other designations	Caroline's Rose, White Rose Cluster, Cr 460, Mel 245
Associations
Constellation	Cassiopeia
	See also: Open cluster, List of open clusters

NGC 7789 (also known as Caroline's Rose,^[4] Caroline's Haystack,^[5] or the White Rose Cluster) is an open cluster in Cassiopeia that was discovered by Caroline Herschel in 1783. Her brother William Herschel included it in his catalog as H VI.30. This cluster is also known as the "White Rose" Cluster or "Caroline's Rose" Cluster because when seen visually, the loops of stars and dark lanes look like the swirling pattern of rose petals as seen from above.

References

^ ^a ^b Xin, Y; Deng, L (2005). "Blue Stragglers in Galactic Open Clusters and Integrated Spectral Energy Distributions". The Astrophysical Journal. 619 (2): 824–838. arXiv:astro-ph/0410325. Bibcode:2005ApJ...619..824X. doi:10.1086/426681. S2CID 2087723.
^ ^a ^b ^c Kharchenko, N. V; Piskunov, A. E; Röser, S; Schilbach, E; Scholz, R.-D (2005). "Astrophysical parameters of Galactic open clusters". Astronomy and Astrophysics. 438 (3): 1163–1173. arXiv:astro-ph/0501674. Bibcode:2005A&A...438.1163K. doi:10.1051/0004-6361:20042523. S2CID 9079873.
^ Wu, Zhen-Yu; Du, Cui-Hua; Ma, Jun; Zhou, Xu (2009). "Mass of Open Cluster NGC 7789". Chinese Physics Letters. 26 (2): 029701. Bibcode:2009ChPhL..26b9701W. doi:10.1088/0256-307X/26/2/029701. S2CID 250826535.
^ ^a ^b "Caroline's Rose (NGC 7789)". Sky & Telescope. Retrieved 23 June 2020.
^ Stoyan, Ronald; Schurig, Stephan (2014). interstellarum Deep Sky Atlas. Erlangen: Cambridge University Press; Oculum-Verlag GmbH. ISBN 978-1-107-50338-0. OCLC 920437579.