Also known as η Cen, η Centauri, HD 127972, HD 127973, HIP 71352, HIC 71352, HR 5440, eta Cen
star in the constellation Centaurus
Astronomical data · SIMBAD
- Object type
- Be*
- Spectral type
- B2Ve
- Distance
- 306 light-years
- Redshift
- z = 0
- Coordinates
- RA 218.8768° · Dec -42.1578°
View on SIMBAD →
via SIMBAD · CDS Strasbourg
Wikidata facts
- Instance of
- eruptive variable star
- Constellation
- Centaurus
- Radius
- 5.34
- Variable-star type
- Lambda Eridani variable
Show 15 more facts
- spectral class
- B3VE,N,COMP
- catalog code
- ALS 15000
- stellar rotational velocity
- 240
- absolute magnitude
- -2.53
- apparent magnitude
- 2.96
- right ascension
- 218.87676733750
- declination
- -42.15782521722
- effective temperature
- 21000
- parallax
- 10.67
- radial velocity
- -86.8
- epoch
- J2000.0
- surface gravity
- 9000
- luminosity
- 8700
- right ascension component of proper motion
- -38
- declination component of proper motion
- -27
Sources (2)
via Wikidata · CC0
Article · 中文
库楼二（η Cen /半人马座η ）是半人马座的一颗恒星。它转速极快，自转周期小于一天。 库楼二是一颗Be型星，即它的氢谱线的辐射是变化的，所以库楼二的亮度也稍微变化，被归类为仙后座γ变星。库楼二距离地球大约309光年。库楼二的质量很大，处于进化为白矮星及超新星的界线上。
Abstract from DBpedia / Wikipedia · CC BY-SA