Beta Pavonis

Beta Pavonis is a single,^[9] white-hued star in the southern constellation of Pavo. Its name is a Bayer designation that is Latinized from β Pavonis, and abbreviated Beta Pav or β Pav. It can be seen with the naked eye, having an apparent visual magnitude of 3.42.^[2] Based upon an annual parallax shift of 24.14 mas as seen from Earth, it is located 135 light-years from the Sun. It is moving away from the Sun with a radial velocity of +4 km/s.^[6] Beta Pavonis is a member of the Ursa Major Moving Group, a set of stars that share a similar motion through space.^[10]

β Pavonis

Location of β Pavonis (circled)
Observation data Epoch J2000      Equinox J2000
Constellation	Pavo
Right ascension	20h 44m 57.49399s[1]
Declination	−66° 12′ 11.5708″[1]
Apparent magnitude (V)	3.42[2]
Characteristics
Spectral type	A5 IV[3] or A7 III[4]
U−B color index	+0.12[5]
B−V color index	+0.16[5]
Astrometry
Radial velocity (Rv)	+3.7±0.5[6] km/s
Proper motion (μ)	RA: −42.67[1] mas/yr Dec.: +9.94[1] mas/yr
Parallax (π)	24.14±0.16 mas[1]
Distance	135.1 ± 0.9 ly (41.4 ± 0.3 pc)
Absolute magnitude (MV)	+0.33[2]
Details
Mass	2.51[3] M☉
Radius	2.3[7] R☉
Luminosity	66[3] L☉
Surface gravity (log g)	3.84[8] cgs
Temperature	8,184±278[8] K
Rotational velocity (v sin i)	75[3] km/s
Age	305[8] Myr
Other designations
β Pav, CPD−66°3501, FK5 775, GC 28862, HD 197051, HIP 102395, HR 7913, SAO 254862
Database references
SIMBAD	data

Zorec and Royer (2012) list a stellar classification for this star of A5 IV,^[3] indicating it is an evolving subgiant star that has consumed the hydrogen at its core and has begun to expand onto the red giant branch. However, Houk (1979) listed a more evolved class of A7 III,^[4] suggesting it is already a giant star. It has about 2.3^[7] times the Sun's radius and 2.51^[3] times the mass of the Sun. At the estimated age of 305^[8] million years, the star still has a relatively high rate of spin, having a projected rotational velocity of 75 km/s.^[3] Beta Pavonis is radiating 66^[3] times the Sun's luminosity from its photosphere at an effective temperature of about 8,184 K.^[8]