北冕座RR

**北冕座RR（RR Coronae Borealis）**
觀測資料
曆元:	J2000.0 [1]
星座:	北冕座 [1]
赤經:	15h 41m 26.22899s [1]
赤緯:	+38° 33′ 26.5958″ [1]
視星等:	7.3-8.2[2]

北冕座RR（RR CrB, HD 140297, HIP 76844）是M3型，位於北冕座的半規則變星，視差2.93mas，也就是距離341秒差距（1,110光年）[1]。它的光度在7.3和8.2等之間，以超過60.8天的週期變化著[2]。它距離太陽1,228光年之遙，它的亮度約為太陽的2,180倍，表面溫度為3,309K[3]。

參考資料

SIMBAD, RR Coronae Borealis 页面存档备份，存于 (accessed 20 February 2013)
Otero, Sebastian Alberto. . The International Variable Star Index. American Association of Variable Star Observers. 15 August 2011 [20 July 2014]. （原始内容存档于2017-10-07）.
McDonald, I.; Zijlstra, A. A.; Boyer, M. L. . 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.

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[SIMBAD-1] SIMBAD, RR Coronae Borealis 页面存档备份，存于 (accessed 20 February 2013)

[AAVSORR-2] Otero, Sebastian Alberto. . The International Variable Star Index. American Association of Variable Star Observers. 15 August 2011 [20 July 2014]. （原始内容存档于2017-10-07）.

[Mcdonald-3] McDonald, I.; Zijlstra, A. A.; Boyer, M. L. . 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.