Theta Pavonis

θ Pavonis
Location of θ Pavonis (circled)
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]
Distance213 ± 1 ly
(65.3 ± 0.3 pc)
Absolute magnitude (MV)1.56[2]
Details
Mass1.56[5] M☉
Radius2.51+0.09
−0.13[1] R☉
Luminosity17.4±0.1[1] L☉
Surface gravity (log g)3.94±0.14[5] cgs
Temperature7,453+199
−136[1] K
Metallicity [Fe/H]+0.01[6] dex
Rotational velocity (v sin i)245[7] km/s
Age425[5] Myr
Other designations
θ Oct, CPD−65°3754, GC 25706, HD 173168, HIP 92294, HR 7036, SAO 254374[8]
Database references
SIMBADdata

θ Pavonis, Latinized as Theta Pavonis, is a single[9] star in the southern constellation of Pavo. 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]

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]

  1. ^ a b c d e f g h i j k l Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference houk1979 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  5. ^ a b c d e Cite error: The named reference David2015 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Netopil2017 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Glebocki2005 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Simon1993 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Piters1998 was invoked but never defined (see the help page).