39 Aquarii

39 Aquarii
Observation data
Epoch J2000      Equinox J2000
Constellation Aquarius
Right ascension 22h 12m 25.76398s[1]
Declination −14° 11′ 38.3009″[1]
Apparent magnitude (V) 6.03[2]
Characteristics
Spectral type F0 V[3]
U−B color index +0.00[4]
B−V color index +0.38[2]
Astrometry
Radial velocity (Rv)+15.2[5] km/s
Proper motion (μ) RA: +23.89[6] mas/yr
Dec.: -47.43[6] mas/yr
Parallax (π)22.5378 ± 0.1723 mas[1]
Distance145 ± 1 ly
(44.4 ± 0.3 pc)
Absolute magnitude (MV)2.92[7]
Details
Mass1.35[8] M☉
Radius1.79+0.04
−0.10[1] R☉
Luminosity6.109±0.054[1] L☉
Surface gravity (log g)3.99[3] cgs
Temperature6,806[3] K
Metallicity [Fe/H]–0.21[3] dex
Age1.8[7] Gyr
Other designations
39 Aqr, BD−14° 6229, HD 210705, HIP 109624, HR 8462, SAO 164923[4]
Database references
SIMBADdata

39 Aquarii is a star in the zodiac constellation of Aquarius. 39 Aquarii is its Flamsteed designation. It is a faint naked eye star with an apparent visual magnitude of 6.03.[2] Based upon an annual parallax shift of 23.78 measured with a 3% margin of error,[6] this star is at a distance of around 137 light-years (42 parsecs) from Earth. It is a double star with a magnitude 9.3 companion at an angular separation of 0.6 arcseconds along a position angle of 257°.[9]

The stellar classification of this star is F0 V;[3] hence it belongs to the category of F-type main sequence stars that generate energy through hydrogen fusion at the core. It is 1.8[7] billion years old with 1.35[8] times the mass of the Sun and 1.79[1] times the Sun's radius. The star is radiating 6.1[1] times the luminosity of the Sun from its photosphere at an effective temperature of 6,806 K.[3]

  1. ^ a b c d e f g Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference mnrassa27_11 was invoked but never defined (see the help page).
  3. ^ a b c d e f Cite error: The named reference mnras374_2_664 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference gcrv1953 was invoked but never defined (see the help page).
  6. ^ a b c Cite error: The named reference aaa474_2_653 was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference aaa418_989 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference David2015 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference aaa356_141 was invoked but never defined (see the help page).