Rho Pavonis
Variable star in the constellation Pavo
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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 | |
| ρ Pav, CPD−61°6495, FK5 3647, GC 28668, HD 195961, HIP 101773, HR 7859, SAO 254835[9] | |
| 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]