Rho Pavonis
Variable star in the constellation Pavo / From Wikipedia, the free encyclopedia
Rho Pavonis, Latinized from ρ Pavonis, is a single,[10] variable star in the southern constellation of Pavo. It is yellow-white in hue and faintly visible to the naked eye with an apparent visual magnitude that fluctuates around 4.86.[2] The star is located at a distance of approximately 190 light years from the Sun based on parallax,[1] and is drifting further away with a radial velocity of +8 km/s.[2] It is a candidate outlying member of the Tucana Association of co-moving stars.[11]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Pavo |
Right ascension | 20h 37m 35.31275s[1] |
Declination | −61° 31′ 47.7145″[1] |
Apparent magnitude (V) | 4.86[2] (4.85 – 4.91)[3] |
Characteristics | |
Spectral type | Fm δ Del[4] |
U−B color index | +0.19[3] |
B−V color index | +0.43[3] |
Variable type | δ Sct[5] |
Astrometry | |
Radial velocity (Rv) | +8.0±0.8[2] km/s |
Proper motion (μ) | RA: +59.61[1] mas/yr Dec.: −72.69[1] mas/yr |
Parallax (π) | 17.20 ± 0.24 mas[1] |
Distance | 190 ± 3 ly (58.1 ± 0.8 pc) |
Absolute magnitude (MV) | 1.04[6] |
Details | |
Radius | 4.33+0.39 −0.17[7] R☉ |
Luminosity | 34.1±0.8[7] L☉ |
Temperature | 6,704+136 −285[7] K |
Rotational velocity (v sin i) | 45.0[8] km/s |
Other designations | |
Database references | |
SIMBAD | data |
This is a metallic-line star with a stellar classification of Fm δ Del,[4] where the suffix notation indicating it is a δ Delphini star. It is a Delta Scuti variable, varying in brightness by 0.03 magnitudes.[13] The dominant pulsation period is 2.74 hours, but the effects of other pulsation periods are apparent in the light curve.[14] The star has 4.3[7] times the girth of the Sun and is spinning with a projected rotational velocity of 45 km/s.[8] It is radiating 34[7] times the luminosity of the Sun from its photosphere at an effective temperature of 6,704 K.[7]