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Eta Pavonis

η Pavonis
Location of η Pavonis (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Pavo
Right ascension 17h 45m 43.98605s[1]
Declination −64° 43′ 25.9394″[1]
Apparent magnitude (V) 3.61[2]
Characteristics
Spectral type K2II[3]
U−B color index +1.17[4]
B−V color index +1.19[4]
Astrometry
Radial velocity (Rv)−7.60[5] km/s
Proper motion (μ) RA: −11.96[1] mas/yr
Dec.: −56.57[1] mas/yr
Parallax (π)9.26 ± 0.18 mas[1]
Distance352 ± 7 ly
(108 ± 2 pc)
Absolute magnitude (MV)−1.56[2]
Details
Mass3.98[6] M☉
Radius33.49+8.17
−4.57[7] R☉
Luminosity469±20[7] L☉
Surface gravity (log g)1.97[8] cgs
Temperature4,642+354
−480[7] K
Metallicity [Fe/H]+0.15[8] dex
Rotational velocity (v sin i)< 1.5[9] km/s
Other designations
η Pav, CPD−64°3662, FK5 661, GC 254020, HD 160635, HIP 86929, HR 6582, SAO 245369[10]
Database references
SIMBADdata

Eta Pavonis, a name latinized from η Pavonis, is a single[11] star in the southern constellation of Pavo, positioned near the western constellation border next to Ara. It has an orange hue and is visible to the naked eye with an apparent visual magnitude of 3.61.[2] Based on parallax, this object is located at a distance of approximately 350 light-years (108 pc) from the Sun.[1] It has an absolute magnitude of −1.56,[2] and is drifting closer with a radial velocity of −7.6 km/s.[5]

This is an evolved bright giant star with a stellar classification K2II,[3] between the classifications of giant and supergiant. Having exhausted the supply of hydrogen at its core, it has expanded to around 33.5 times the radius of the Sun.[7] The star is radiating 469[7] times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,642 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 XHIP was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Houk1975 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Mallama2014 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference charbonnel2020 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 luck was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference deMedeiros2014 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).

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