Epsilon Pavonis

Epsilon Pavonis is a single,^[9] white-hued star in the constellation Pavo. Its name is a Bayer designation that is Latinized from ε Pavonis, and abbreviated Epsilon Pav or ε Pav. It can be viewed with the naked eye, having an apparent visual magnitude of 3.97.^[2] The annual parallax shift of 31.04 mas^[1] provides a distance estimate of 105 light years from the Sun.

ε Pavonis

Location of ε Pavonis (circled)
Observation data Epoch J2000      Equinox J2000
Constellation	Pavo
Right ascension	20h 00m 35.55558s[1]
Declination	−72° 54′ 37.8198″[1]
Apparent magnitude (V)	3.97[2]
Characteristics
Spectral type	A0 Va[2]
U−B color index	−0.05[3]
B−V color index	−0.03[2]
Astrometry
Radial velocity (Rv)	−6.7±0.7[4] km/s
Proper motion (μ)	RA: +81.78[1] mas/yr Dec.: −132.16[1] mas/yr
Parallax (π)	31.04±0.17 mas[1]
Distance	105.1 ± 0.6 ly (32.2 ± 0.2 pc)
Absolute magnitude (MV)	1.43[2]
Details
Mass	2.2[5] M☉
Radius	1.74[6] R☉
Luminosity	32[7] L☉
Surface gravity (log g)	4.32±0.02[6] cgs
Temperature	10,440[8] K
Rotational velocity (v sin i)	85[7] km/s
Age	27[6] Myr
Other designations
ε Pav, CPD−73°2086, FK5 748, GC 27631, HD 188228, HIP 98495, HR 7590, SAO 257757
Database references
SIMBAD	data

With a stellar classification of A0 Va,^[2] Epsilon Pavonis is an ordinary A-type main-sequence star that is generating energy through hydrogen fusion at its core. It is just 27 million years old^[6] with a projected rotational velocity of 85 km/s.^[7] The star has 2.2 times the mass of the Sun^[5] and 1.74 times the Sun's radius.^[6] It is radiating 32 times the Sun's luminosity from its photosphere^[7] at an effective temperature of 10,440 K.^[8]

This star is a member of the proposed Argus Association, a young moving group of more than 60 stars associated with the IC 2391 cluster.^[10] Epsilon Pavonis is moving closer to the Sun with a radial velocity of −6.7 km/s.^[4]