Kappa Serpentis

Kappa Serpentis
Observation data
Epoch J2000      Equinox J2000
Constellation Serpens
Right ascension 15h 48m 44.37720s[1]
Declination +18° 08′ 29.6337″[1]
Apparent magnitude (V) 4.09[2]
Characteristics
Spectral type M0.5III[3]
U−B color index +1.95[2]
B−V color index +1.62[2]
Astrometry
Radial velocity (Rv)−38.48[4] km/s
Proper motion (μ) RA: −52.407 mas/yr[1]
Dec.: −88.419 mas/yr[1]
Parallax (π)8.5231 ± 0.1657 mas[1]
Distance383 ± 7 ly
(117 ± 2 pc)
Absolute magnitude (MV)−1.25[5]
Details
Radius71.31+1.42
−1.48[6] R☉
Luminosity1,021±57[6] L☉
Temperature3,863±39[6] K
Other designations
Gudja, κ Ser, 35 Ser, NSV 7269, FK5 584, HD 141477, HIP 77450, HR 5879, SAO 101752[7]
Database references
SIMBADdata

Kappa Serpentis, Latinised from κ Serpentis, is a single,[8] red-hued star in the constellation Serpens, in its head (Serpens Caput). It has the proper name Gudja /ˈɡuːdʒə/[9] and the Flamsteed designation 35 Serpentis.[7] This star is visible to the naked eye with an apparent visual magnitude of +4.09.[2] It is located approximately 383 light years from the Sun, based on parallax,[1] and is drifting closer with a radial velocity of −38 km/s.[4]

This object is an aging red giant star with a stellar classification of M0.5III.[3] After exhausting the supply of hydrogen at its core, the star cooled and expanded off the main sequence, and now has around 71 times the Sun's radius. It is radiating nearly 1,000 times the luminosity of the Sun from its photosphere at an effective temperature of 3,863 K.[6] This is a suspected variable star.[10]

  1. ^ a b c d e Cite error: The named reference DR3 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Ducati2002 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Perkins1989 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Famaey2009 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  6. ^ a b c d Cite error: The named reference baines was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference IAU-CSN was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Samus2017 was invoked but never defined (see the help page).