Theta Pavonis
A-type main sequence star in the constellation Pavo
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Theta Pavonis is a single[9] star in the southern constellation of Pavo. Its name is a Bayer designation that is Latinized from θ Pavonis, and abbreviated Theta Pav or θ Pav. It is just visible to the naked eye as a dim, white-hued star, having an apparent visual magnitude of 5.71.[2] This star is located 213 light years from the Sun based on parallax.[1]
 | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Pavo |
| Right ascension | 18h 48m 37.90451s[1] |
| Declination | −65° 04′ 39.6498″[1] |
| Apparent magnitude (V) | 5.71[2] |
| Characteristics | |
| Evolutionary stage | main sequence |
| Spectral type | A8V[3] |
| B−V color index | +0.268±0.004[2] |
| Astrometry | |
| Radial velocity (Rv) | −0.7±4.3[4] km/s |
| Proper motion (μ) | RA: −38.266[1] mas/yr Dec.: −78.246[1] mas/yr |
| Parallax (π) | 15.3252±0.0741 mas[1] |
| Distance | 213 ± 1 ly (65.3 ± 0.3 pc) |
| Absolute magnitude (MV) | 1.56[2] |
| Details | |
| Mass | 1.56[5] M☉ |
| Radius | 2.51+0.09 −0.13[1] R☉ |
| Luminosity | 17.4±0.1[1] L☉ |
| Surface gravity (log g) | 3.94±0.14[5] cgs |
| Temperature | 7,453+199 −136[1] K |
| Metallicity [Fe/H] | +0.01[6] dex |
| Rotational velocity (v sin i) | 245[7] km/s |
| Age | 425[5] Myr |
| Other designations | |
| θ Oct, CPD−65°3754, GC 25706, HD 173168, HIP 92294, HR 7036, SAO 254374[8] | |
| Database references | |
| SIMBAD | data |
This object is an A-type main-sequence star with a stellar classification of A8V,[3] which indicates it is generating energy through hydrogen fusion at its core. It displays little to no detectable X-ray emission, suggesting a weak corona[10] and, at best, a shallow convection zone.[11] Theta Pavonis is 425[5] million years old and is spinning rapidly with a projected rotational velocity of 245 km/s.[7] The star has 1.56[5] times the mass of the Sun and 2.51[1] times the Sun's radius. It is radiating 17.4[1] times the luminosity of the Sun from its photosphere at an effective temperature of 7,453 K.[1]
It lies six arc-minutes north of the barred lenticular galaxy NGC 6684.[citation needed]