60 Serpentis

60 Serpentis
Observation data
Epoch J2000      Equinox J2000
Constellation Serpens
Right ascension 18h 29m 40.97948s[1]
Declination −01° 59′ 07.1058″[1]
Apparent magnitude (V) 5.38[2]
Characteristics
Spectral type K0 III[3]
B−V color index 0.961±0.004[2]
Astrometry
Radial velocity (Rv)+28.36±0.34[4] km/s
Proper motion (μ) RA: −85.35[1] mas/yr
Dec.: −34.31[1] mas/yr
Parallax (π)25.16 ± 0.31 mas[1]
Distance130 ± 2 ly
(39.7 ± 0.5 pc)
Absolute magnitude (MV)1.25±0.07[5]
Details
Mass1.81±0.49[5] M☉
Radius8[4] R☉
Luminosity35[4] L☉
Surface gravity (log g)2.92±0.11[5] cgs
Temperature5,059±92[5] K
Metallicity [Fe/H]−0.08[4] dex
Rotational velocity (v sin i)3.9[4] km/s
Age1.26+0.19
−0.16[5] Myr
Other designations
c Ser, 60 Ser, BD−02° 4641, FK5 1480, HD 170474, HIP 90642, HR 6935, SAO 142348[6]
Database references
SIMBADdata

60 Serpentis, also known as c Serpentis, is a single,[7] orange-hued star in Serpens Cauda, the eastern section of the constellation Serpens. It is faintly visible to the naked eye with an apparent visual magnitude of 5.38.[2] The distance to this star, as estimated from its annual parallax shift of 25.16±0.31 mas,[1] is approximately 130 light years. It is moving further from the Sun with a heliocentric radial velocity of +28 km/s,[4] having approached as close as 107 ly (32.7 pc) some 1.9 million years ago.[2]

This is an evolved K-type giant star with a stellar classification of K0 III,[3] having used up its core hydrogen and expanded. At the age of around 1.26 billion years, it currently belongs to the so-called "red clump", which indicates it is on the horizontal branch and is generating energy through helium fusion at its core.[8] The star has an estimated 1.8[5] times the mass of the Sun and 8[4] times the Sun's radius. It is radiating 35[4] times the Sun's luminosity from its enlarged photosphere at an effective temperature of about 5,059 K.[5]

  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 Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Houk1999 was invoked but never defined (see the help page).
  4. ^ a b c d e f g h Cite error: The named reference Massarotti2008 was invoked but never defined (see the help page).
  5. ^ a b c d e f g Cite error: The named reference Feuillet2016 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Alves2000 was invoked but never defined (see the help page).