Rho Pavonis

Rho Pavonis
Location of ρ Pavonis (circled)
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]
Distance190 ± 3 ly
(58.1 ± 0.8 pc)
Absolute magnitude (MV)1.04[6]
Details
Radius4.33+0.39
−0.17[7] R☉
Luminosity34.1±0.8[7] L☉
Temperature6,704+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
SIMBADdata

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]

A light curve for Rho Pavonis, plotted from TESS data[12]

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]

  1. ^ a b c d e f Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference garcia was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Houk1975 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference gcvs was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference XHIP was invoked but never defined (see the help page).
  7. ^ a b c d e f Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference Glebocki2005 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Zuckerman2001 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference MAST was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference Rodríguez2000 was invoked but never defined (see the help page).
  14. ^ Cite error: The named reference Kurtz was invoked but never defined (see the help page).