北冕座RR

求闻百科,共笔求闻
北冕座RR(RR Coronae Borealis)
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RRRR CrB, HD 140297, HIP 76844)是M3型,位于北冕座半规则变星视差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. 1.0 1.1 1.2 1.3 1.4 1.5 SIMBAD, RR Coronae Borealis (accessed 20 February 2013)
  2. 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]. 
  3. 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可免费查阅. doi:10.1111/j.1365-2966.2012.21873.x.