Z Ursae Minoris
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Ursa Minor |
| Right ascension | 15h 02m 01.477s [1] |
| Declination | +83° 03′ 48.66″ [1] |
| Spectral type | C |
Z Ursae Minoris (Z UMi) is a star in the constellation Ursa Minor. It was confirmed to be one of a rare class of stars—R Coronae Borealis variables—after its spectrum was analysed in 2006.[2] Initially observed to be variable in 1934, it suddenly dropped 6 magnitudes in 1992 and was subsequently diagnosed as an RcB star.[3] Up till this point it was thought to have been a long period (Mira) variable.[2]
References
- 1 2 SIMBAD, Z Ursae Minoris (accessed 18 May 2014)
- 1 2 Kipper, Tõnu; Klochkova, Valentina G. (2006). "A Cool R Coronae Borealis Star Z UMi". Baltic Astronomy 15: 531–37. arXiv:0706.3271. Bibcode:2006BaltA..15..531K.
- ↑ Benson, Priscilla J.; Clayton, Geoffrey C.; Garnavich, Peter; Szkody, Paula. "Z Ursa Minoris -- a new R Coronae Borealis variable". The Astronomical Journal 108 (1): 247–50. Bibcode:1994AJ....108..247B. doi:10.1086/117063.
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