狗国三

人马座6262 Sagittarii),拜耳命名法人马座c,中文名狗国三,是一颗位于人马座M-型巨星[1]。它位于星群飞弹螺(中国古代星官称为狗国)的西南边。它是一颗不规则变星。亮度在4.45-4.64之间变化,当它最亮时,是飞弹螺星群最明亮的一颗恒星。人马座62距离地球约450光年[1]

人马座62(狗国三)
62 Sagittarii
觀測資料
曆元 J2000.0
星座 人马座
星官 斗宿 狗国
赤經 20h 02m 39.4805s[1]
赤緯 −27° 42 35.441[1]
視星等(V) 4.45 - 4.64[2]
特性
光谱分类M4III[1]
U−B 色指数+1.80[3]
B−V 色指数+1.65[3]
R−I 色指数+1.56[3]
变星类型不规则变星[2]
天体测定
徑向速度 (Rv)9.9 ± 0.9[1] km/s
自行 (μ) 赤经:32.28[1] mas/yr
赤纬:14.35[1] mas/yr
视差 (π)7.28 ± 0.74[1] mas
距离approx. 450 ly
(approx. 140 pc)
绝对星等 (MV)−1.1[4]
詳細資料
半徑70[5] R
其他命名
62 Sgr, c Sagittarii, c Sgr, V3872 Sagittarii, V3872 Sgr, CD−28 16355, CPD−28 7105, FK5 753, GC 27763, HD 189763, HIP 98688, HR 7650, PPM 270603, SAO 188844.[1]
參考資料庫
SIMBAD资料

参考资料

  1. V* V3872 Sgr -- Pulsating variable Star, database entry, SIMBAD. Accessed on line November 19, 2009.
  2. V3872 Sgr, database entry, The combined table of GCVS Vols I-III and NL 67-78 with improved coordinates, General Catalogue of Variable Stars, Sternberg Astronomical Institute, Moscow, Russia. Accessed on line November 19, 2009.
  3. HR 7650, database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID V/50. Accessed on line November 19, 2009.
  4. From apparent magnitude and parallax.
  5. HD 189763, database entry, Catalog of Apparent Diameters and Absolute Radii of Stars (CADARS), 3rd edition, L. E. Pasinetti-Fracassini, L. Pastori, S. Covino, and A. Pozzi, CDS ID II/224. Accessed on line November 19, 2009.
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