NGC 7789

NGC 7789 (also known as Caroline's Rose[4] 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.

Map showing location of NGC 7789

NGC 7789
NGC 7789 taken with an amateur telescope
Credit: Hewholooks
Observation data (J2000.0 epoch)
ConstellationCassiopeia
Right ascension 23h 57m 24s[1]
Declination+56° 42′ 30″[1]
Distance7.6 kly (2,337[2])
Apparent magnitude (V)6.7
Apparent dimensions (V)16′[2]
Physical characteristics
Mass6,620.4 ± 762.5[3] M☉
Estimated age1.7 GYr[2]
Other designationsCaroline's Rose[4], White Rose Cluster, Cr 460, Mel 245

References
  1. 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.
  2. 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.
  3. 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.
  4. "Caroline's Rose (NGC 7789)". Sky & Telescope. Retrieved 23 June 2020.


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