北冕座RRRR CrB, HD 140297, HIP 76844)是M3型,位於北冕座半規則變星視差2.93mas,也就是距離341秒差距(1,110光年)[6]。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[5]

北冕座RR
觀測資料
曆元 J2000
星座 北冕座
星官
赤經 15h 41m 26.22899s[1]
赤緯 +38° 33′ 26.5958″[1]
視星等(V) 7.3 - 8.2[2]
特性
光譜分類M5III[3] (M3 - M6[2])
變星類型SRb[2]
天體測定
徑向速度 (Rv)-58.39[4] km/s
自行 (μ) 赤經:20.24[1] mas/yr
赤緯:-32.44[1] mas/yr
視差 (π)2.93 ± 0.53[1] mas
距離approx. 1,100 ly
(approx. 340 pc)
詳細資料
亮度2,180[5] L
溫度3,309[5] K
其他命名
RR CrB, BD+39° 2901, HD 140297, HIP 76844, SAO 64848, GC 21108, TYC 3053-1035-1, 2MASS J15412622+3833266
參考資料庫
SIMBAD資料

參考資料

編輯
  1. ^ 1.0 1.1 1.2 1.3 1.4 van Leeuwen, F. Validation of the new Hipparcos reduction. Astronomy and Astrophysics. 2007, 474 (2): 653–664 [2023-08-03]. Bibcode:2007A&A...474..653V. S2CID 18759600. arXiv:0708.1752 . doi:10.1051/0004-6361:20078357. (原始內容存檔於2019-12-07).  Vizier catalog entry 頁面存檔備份,存於網際網路檔案館
  2. ^ 2.0 2.1 2.2 2.3 Otero, Sebastian Alberto. RR Coronae Borealis. The International Variable Star Index. American Association of Variable Star Observers. 15 August 2011 [20 July 2014]. (原始內容存檔於2017-10-07). 
  3. ^ Yoon, Dong-Hwan; Cho, Se-Hyung; Kim, Jaeheon; Yun, Young joo; Park, Yong-Sun. SiO and H2O Maser Survey toward Post-asymptotic Giant Branch and Asymptotic Giant Branch Stars. The Astrophysical Journal Supplement. 2014, 211 (1): 15. Bibcode:2014ApJS..211...15Y. S2CID 73561291. doi:10.1088/0067-0049/211/1/15. 
  4. ^ Famaey, B.; Jorissen, A.; Luri, X.; Mayor, M.; Udry, S.; Dejonghe, H.; Turon, C. Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters. Astronomy and Astrophysics. 2005, 430: 165. Bibcode:2005A&A...430..165F. S2CID 17804304. arXiv:astro-ph/0409579 . doi:10.1051/0004-6361:20041272. 
  5. ^ 5.0 5.1 5.2 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. 
  6. ^ SIMBAD, RR Coronae Borealis頁面存檔備份,存於網際網路檔案館) (accessed 20 February 2013)