Zeta2 Muscae

For other star systems with this Bayer designation see ζ Muscae

Zeta² Muscae, Latinized from ζ² Muscae, is a star^[10] in the southern constellation of Musca. Its apparent magnitude is 5.16. This is a white main sequence star of spectral type A5V around 330 light-years distant from Earth.^[9] Like several other stars in the constellation, it is a member of the Lower Centaurus–Crux subgroup of the Scorpius–Centaurus association, a group of predominantly hot blue-white stars that share a common origin and proper motion across the galaxy.^[11] It is part of a triple star system with faint companions at 0.5 and 32.4 arc seconds distance.^[12] The former is an infrared source,^[13] the latter has a visual magnitude of 10.7.^[4]

ζ² Muscae

Observation data Epoch J2000.0      Equinox J2000.0
Constellation	Musca
Right ascension	12h 22m 07.34002s[1]
Declination	−67° 31′ 19.5871″[1]
Apparent magnitude (V)	5.14[2] + 8.71[3] + 10.7[4]
Characteristics
Spectral type	A5 V[5] + G8-K0V[3]
U−B color index	+0.13[2]
B−V color index	+0.19[2]
Astrometry
Radial velocity (Rv)	−17.0[6] km/s
Proper motion (μ)	RA: −30.50[1] mas/yr Dec.: -6.10[1] mas/yr
Parallax (π)	9.89±0.34 mas[1]
Distance	330 ± 10 ly (101 ± 3 pc)
Absolute magnitude (MV)	+0.13[7]
Details
ζ2 Muscae A
Luminosity	66.7[8] L☉
Temperature	7,400[8] K
Other designations
CPD−66°1747, FK5 2990, HD 107566, HIP 60320, HR 4703, SAO 251866.[9]
Database references
SIMBAD	data