60 Serpentis

Last updated
60 Serpentis
Observation data
Epoch J2000       Equinox J2000
Constellation Serpens [1]
Right ascension 18h 29m 40.97948s [2]
Declination −01° 59′ 07.1058″ [2]
Apparent magnitude  (V)5.38 [1]
Characteristics
Spectral type K0 III [3]
B−V color index 0.961±0.004 [1]
Astrometry
Radial velocity (Rv)+28.36±0.34 [4] km/s
Proper motion (μ)RA: −85.35 [2] mas/yr
Dec.: −34.31 [2] mas/yr
Parallax (π)25.16±0.31  mas [2]
Distance 130 ± 2  ly
(39.7 ± 0.5  pc)
Absolute magnitude  (MV)1.25±0.07 [5]
Details
Mass 1.81±0.49 [5]   M☉
Radius 8 [4]   R☉
Luminosity 35 [4]   L☉
Surface gravity (log g)2.92±0.11 [5]   cgs
Temperature 5,059±92 [5]   K
Metallicity [Fe/H]−0.08 [4]   dex
Rotational velocity (v sin i)3.9 [4]  km/s
Age 1.26+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
SIMBAD data

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. [1] The distance to this star, as estimated from its annual parallax shift of 25.16±0.31  mas , [2] 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. [1]

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]

References

  1. 1 2 3 4 5 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv: 1108.4971 , Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015, S2CID   119257644.
  2. 1 2 3 4 5 6 van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv: 0708.1752 , Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357, S2CID   18759600.
  3. 1 2 Houk, N.; Swift, C. (1999), "Michigan catalogue of two-dimensional spectral types for the HD Stars", Michigan Spectral Survey, 5, Bibcode:1999MSS...C05....0H.
  4. 1 2 3 4 5 6 7 8 Massarotti, Alessandro; et al. (January 2008), "Rotational and Radial Velocities for a Sample of 761 HIPPARCOS Giants and the Role of Binarity", The Astronomical Journal, 135 (1): 209–231, Bibcode:2008AJ....135..209M, doi: 10.1088/0004-6256/135/1/209 , S2CID   121883397.
  5. 1 2 3 4 5 6 7 Feuillet, Diane K.; et al. (2016), "Determining Ages of APOGEE Giants with Known Distances", The Astrophysical Journal, 817 (1): 40, arXiv: 1511.04088 , Bibcode:2016ApJ...817...40F, doi: 10.3847/0004-637X/817/1/40 , S2CID   118675933.
  6. ↑ "60 Ser". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2018-03-19.
  7. ↑ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society , 389 (2): 869–879, arXiv: 0806.2878 , Bibcode:2008MNRAS.389..869E, doi: 10.1111/j.1365-2966.2008.13596.x , S2CID   14878976.
  8. ↑ Alves, David R. (August 2000), "K-Band Calibration of the Red Clump Luminosity", The Astrophysical Journal, 539 (2): 732–741, arXiv: astro-ph/0003329 , Bibcode:2000ApJ...539..732A, doi:10.1086/309278, S2CID   16673121.
This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.