观测资料 | |
---|---|
历元: | J2000.0 [1] |
星座: | 北冕座 [1] |
赤经: | 15h 41m 26.22899s [1] |
赤纬: | +38° 33′ 26.5958″ [1] |
视星等: | 7.3-8.2[2] |
北冕座RR(RR CrB, HD 140297, HIP 76844)是M3型,位于北冕座的半规则变星,视差2.93mas,也就是距离341秒差距(1,110光年)[1]。它的光度在7.3和8.2等之间,以超过60.8天的周期变化著[2]。它距离太阳1,228光年之遥,它的亮度约为太阳的2,180倍,表面温度为3,309K[3]。
参考资料
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 SIMBAD, RR Coronae Borealis (accessed 20 February 2013)
- ↑ 2.0 2.1 Otero, Sebastian Alberto. RR Coronae Borealis. The International Variable Star Index. American Association of Variable Star Observers. 2011-08-15 [2014-07-20].
- ↑ McDonald, I.; Zijlstra, A. A.; Boyer, M. L. Fundamental Parameters and Infrared Excesses of Hipparcos Stars. Monthly Notices of the Royal Astronomical Society. 2012, 427 (1): 343–57. Bibcode:2012MNRAS.427..343M. arXiv:1208.2037 . doi:10.1111/j.1365-2966.2012.21873.x.