Alpha Lupi
Star in the constellation Lupus / From Wikipedia, the free encyclopedia
Dear Wikiwand AI, let's keep it short by simply answering these key questions:
Can you list the top facts and stats about Α Lupi?
Summarize this article for a 10 year old
SHOW ALL QUESTIONS
Alpha Lupi (α Lupi, α Lup) is a blue giant star, and the brightest star in the southern constellation of Lupus. According to the Bortle Dark-Sky Scale, its apparent visual magnitude of 2.3[2] makes it readily visible to the naked eye even from highly light-polluted locales. Based upon parallax measurements made during the Hipparcos mission,[11] the star is around 460 light-years (140 parsecs) from the solar system.[1] It is one of the nearest supernova candidates.[12]
Quick Facts Observation data Epoch J2000 Equinox J2000, Constellation ...
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Lupus |
Right ascension | 14h 41m 55.75579s[1] |
Declination | –47° 23′ 17.5155″[1] |
Apparent magnitude (V) | 2.30[2] (2.29 - 2.34[3]) |
Characteristics | |
Spectral type | B1.5 III[4] |
U−B color index | –0.88[2] |
B−V color index | –0.20[2] |
Variable type | β Cep[3] |
Astrometry | |
Radial velocity (Rv) | +5.4 ± 0.6[5] km/s |
Proper motion (μ) | RA: −20.94[1] mas/yr Dec.: −23.67[1] mas/yr |
Parallax (π) | 7.02 ± 0.17 mas[1] |
Distance | 460 ± 10 ly (142 ± 3 pc) |
Absolute magnitude (MV) | −4.3[6] |
Details | |
Mass | 10.1 ± 1.0[7] M☉ |
Radius | 7.46 ± 0.17[8][lower-alpha 1] R☉ |
Luminosity | 18,200+860 −820[8] L☉ |
Surface gravity (log g) | 3.46[6] cgs |
Temperature | 24,550[8] K |
Metallicity [Fe/H] | 0.04[9] dex |
Rotational velocity (v sin i) | 9.5[8] km/s |
Age | 16–20[5] Myr |
Other designations | |
Database references | |
SIMBAD | data |
Close