天秤座λ
Sign in to saveAlso known as 45 Librae, HD 142096, 45 Lib, lam Lib, λ Lib, λ Librae, SAO 183895, HIP 77811
star system in the constellation Libra
Wikidata facts
- Instance of
- rotating variable star
- Constellation
- Libra
- Distance from Earth
- 135.347
- Radius
- 3.9
- Variable-star type
- rotating ellipsoidal variable
Show 14 more facts
- catalog code
- Renson 40340
- radial velocity
- -12.0
- spectral class
- B3IVSB,V
- stellar rotational velocity
- 207
- parallax
- 7.3884
- apparent magnitude
- 4.975765
- epoch
- J2000.0
- luminosity
- 743
- absolute magnitude
- 0.56
- right ascension component of proper motion
- -12.977
- declination component of proper motion
- -17.736
- age estimated by a dating method
- 282
- right ascension
- 238.33355790343
- declination
- -20.16707527881
Sources (2)
via Wikidata · CC0
Article · 中文
房宿增一(拉丁文名稱為Lambda Librae)是黃道星座天秤座的聯星,拜耳名稱是天秤座λ。它是顆黯淡的恆星,視星等 +5.03,在漆黑的夜晚肉眼隱約可見。年周視差10.54mas,因此與太陽的距離是310光年。在這樣的距離上,星際塵埃造成的消光使它的視星等降低0.22等。 它是只有單一光譜線的光譜聯星,軌道週期14.48天,離心率0.27。可以見到的成員是B型主序星,光譜類型B3V。它是光譜特殊的弱氦星,並且是顆旋轉橢球變星。估計它的半徑是太陽的3.9倍,質量是太陽的5倍。它是類織女的候選者,意味著它有環繞著恆星的岩屑盤引起的紅外過量特徵。這個系統也是個X射線源。
Abstract from DBpedia / Wikipedia · CC BY-SA