Tau5 Serpentis

For other stars with this Bayer designation, see Tau Serpentis.
τ5 Serpentis
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Serpens
Right ascension 15h 36m 29.240s[1]
Declination +16° 07′ 08.70″[1]
Apparent magnitude (V) 5.93[2]
Characteristics
Spectral type F3V[3]
U−B color index +0.04[4]
B−V color index +0.354±0.004[2]
Astrometry
Radial velocity (Rv)−2.0±3.7[5] km/s
Proper motion (μ) RA: 72.175 mas/yr[1]
Dec.: −5.217 mas/yr[1]
Parallax (π)19.2694 ± 0.0392 mas[1]
Distance169.3 ± 0.3 ly
(51.9 ± 0.1 pc)
Absolute magnitude (MV)+2.35[2]
Details
Mass1.54[5] M☉
Luminosity10[2] L☉
Surface gravity (log g)3.96[5] cgs
Temperature6,903±80[5] K
Metallicity [Fe/H]−0.20[5] dex
Rotational velocity (v sin i)88±10[6] km/s
Age1.90[5] Gyr
Other designations
τ5 Ser, 18 Serpentis, BD+16° 2807, GC 20985, HD 139225, HIP 76424, HR 5804, SAO 101642, PPM 131544[3]
Database references
SIMBADdata

Tau5 Serpentis, Latinized from τ5 Serpentis, is a star in the constellation of Serpens. The Flamsteed designation for this star is 18 Serpentis.[3] It has an apparent visual magnitude of 5.93,[2] which is bright enough to be dimly visible to the naked eye. The star is located at a distance of 169 light years from the Sun based on parallax measurements.[1]

The stellar classification of this star is F3V,[3] matching an F-type main-sequence star. It has 1.54 times the mass of the Sun[5] and is radiating 10[2] times the Sun's luminosity from its photosphere at an effective temperature of 6,903 K.[5] The star has an estimated age of 1.9 billion years[5] and is spinning with a projected rotational velocity of about 88 km/s.[6] It is metal poor, which means the abundance of iron in the stellar atmosphere is lower than in the Sun.[5]

  1. ^ a b c d e Cite error: The named reference Gaia_EDR3 was invoked but never defined (see the help page).
  2. ^ a b c d e f Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b c d Cite error: The named reference sb0 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference bsc1 was invoked but never defined (see the help page).
  5. ^ a b c d e f g h i j Cite error: The named reference Casagrande_et_al_2011 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Glebocki_Gnacinski_2005 was invoked but never defined (see the help page).