Star in the constellation Serpens
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 |
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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] |
Distance | 130 ± 2 ly (39.7 ± 0.5 pc) |
Absolute magnitude (MV) | 1.25±0.07[5] |
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Details |
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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 |
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Other designations |
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Database references |
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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.[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]
References
- ^ a b c d e f 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.
- ^ a b c d 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.
- ^ a b Houk, N.; Swift, C. (1999), "Michigan catalogue of two-dimensional spectral types for the HD Stars", Michigan Spectral Survey, 5, Bibcode:1999MSS...C05....0H.
- ^ a b c d e f g h 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.
- ^ a b c d e f g 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.
- ^ "60 Ser". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-03-19.
- ^ 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.
- ^ 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.
Constellation of Serpens
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Stars | Bayer | |
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Flamsteed | |
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Variable | - R
- W
- X
- RT
- UZ
- VV
- VY
- WX
- AA
- AN
- AO
- AP
- AR
- AU
- BQ
- CT
- CV
- CW
- EG
- FH
- FI
- FK
- FL
- FQ
- FR
- LV
- LW
- LX
- MR
- MS
- MT
- MV
- MY
- NN
- NO
- NQ
- NW
- OO
- OU
- PS
- QV
- QX
- QY
- V382
- V411
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HR | - 5665
- 5690
- 5692
- 5706
- 5711
- 5740
- 5745
- 5783
- 5796
- 5831
- 5850
- 5859
- 5861
- 5874
- 5909
- 5913
- 5931
- 5992
- 6005
- 6011
- 6014
- 6016
- 6449
- 6496
- 6544
- 6562
- 6568
- 6600
- 6620
- 6666
- 6681
- 6755
- 6756
- 6757
- 6785
- 6830
- 6840
- 6843
- 6858
- 6890
- 6898
- 6928
- 6993 (e)
- 6999
- 7008
- 7048
- 7076
- 7144
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