Mu2 Scorpii
B-type star in the constellation of Scorpius / From Wikipedia, the free encyclopedia
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For other star systems with a similar Bayer designation, see Mu Scorpii.
Mu2 Scorpii (μ2 Scorpii, abbreviated Mu2 Sco, μ2 Sco), also named Pipirima /pɪˈpɪrɪmə/,[11] is a star in the zodiac constellation of Scorpius. It has an apparent visual magnitude of +3.56,[2] which is bright enough to be seen with the naked eye. Its distance from the Sun is about 474 light-years, as determined by parallax measurements.[1] It is a member of the Upper Centaurus–Lupus subgroup of the Scorpius–Centaurus association.[12]
Quick Facts Observation data Epoch J2000 Equinox J2000, Constellation ...
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Scorpius |
Right ascension | 16h 52m 20.14532s[1] |
Declination | −38° 01′ 03.1258″[1] |
Apparent magnitude (V) | +3.56[2] |
Characteristics | |
Spectral type | B2 IV[3] |
U−B color index | −0.878[2] |
B−V color index | −0.219[2] |
Astrometry | |
Radial velocity (Rv) | +1.4[4] km/s |
Proper motion (μ) | RA: −11.09[1] mas/yr Dec.: −23.32[1] mas/yr |
Parallax (π) | 6.88 ± 0.12 mas[1] |
Distance | 474 ± 8 ly (145 ± 3 pc) |
Absolute magnitude (MV) | −2.25[5] |
Details | |
Mass | 8.7±0.2[6] M☉ |
Radius | 7.0[7] R☉ |
Luminosity | 2,385[8] L☉ |
Temperature | 23,113[7] K |
Rotational velocity (v sin i) | 58[9] km/s |
Age | 18.5±3.2[6] Myr |
Other designations | |
Database references | |
SIMBAD | data |
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