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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.
| NGC 7789 | |
|---|---|
 NGC 7789 taken with an amateur telescope | |
| Observation data (J2000.0 epoch) | |
| Right ascension | 23h 57m 24s[1] |
| Declination | +56° 42′ 30″[1] |
| Distance | 7.6 kly (2,337[2]) |
| Apparent magnitude (V) | 6.7 |
| Apparent dimensions (V) | 16′[2] |
| Physical characteristics | |
| Mass | 6,620.4 ± 762.5[3] M☉ |
| Estimated age | 1.7 GYr[2] |
| Other designations | Caroline's Rose,[4] White Rose Cluster, Cr 460, Mel 245 |
| Associations | |
| Constellation | Cassiopeia |
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