astro.wikisort.org - Star11 Serpentis is a single[9] star in the constellation of Serpens, located 271 light years away from the Sun. It has the Bayer designation A1 Serpentis,[10] 11 Serpentis is the Flamsteed designation. This object is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of 5.497.[2] It is moving closer to the Earth with a heliocentric radial velocity of −16 km/s.[4]
Star in the constellation Serpens
This article is about A
1 Serpentis. For other stars with this
Bayer designation, see A Serpentis.
11 Serpentis
Observation data Epoch J2000 Equinox J2000 |
Constellation |
Serpens |
Right ascension |
15h 32m 57.93765s[1] |
Declination |
−01° 11′ 11.0412″[1] |
Apparent magnitude (V) |
5.497[2] |
Characteristics |
Evolutionary stage |
horizontal branch[2] |
Spectral type |
K0 III[3] |
B−V color index |
1.092[2] |
Astrometry |
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Radial velocity (Rv) | −16.1±2.8[4] km/s |
Proper motion (μ) | RA: −17.765[1] mas/yr Dec.: −42.217[1] mas/yr |
Parallax (π) | 12.0563 ± 0.1290 mas[1] |
Distance | 271 ± 3 ly (82.9 ± 0.9 pc) |
Absolute magnitude (MV) | 0.83[5] |
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Details |
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Mass | 1.27±0.35[6] M☉ |
Radius | 11[7] R☉ |
Luminosity | 50[7] L☉ |
Surface gravity (log g) | 2.48±0.11[6] cgs |
Temperature | 4,767±92[6] K |
Metallicity [Fe/H] | −0.13[7] dex |
Age | 2.75+0.88 −0.66[6] Gyr |
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Other designations |
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Database references |
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SIMBAD | data |
This is an aging giant star with a stellar classification of K0 III,[3] a star that has used up its core hydrogen and has expanded. It is a red clump giant on the horizontal branch, which indicates it is generating energy through the fusion of helium at its core.[2] 11 Serpentis is 2.75 billion years old with 1.3[6] times the mass of the Sun and has 11[7] times the Sun's radius. It is radiating 50[7] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,767 K.[6]
References
- Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- 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.
- Houk, N.; Swift, C. (1999), "Michigan catalogue of two-dimensional spectral types for the HD Stars", Michigan Spectral Survey, Ann Arbor, Michigan: Department of Astronomy, University of Michigan, 5, Bibcode:1999MSS...C05....0H
- de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics, 546: 14, arXiv:1208.3048, Bibcode:2012A&A...546A..61D, doi:10.1051/0004-6361/201219219, S2CID 59451347, A61.
- 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.
- 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.
- 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
- "11 Ser". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-03-21.
- Eggleton, P. P.; Tokovinin, A. A. (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
- Hoffleit, D. (July 1979), "Discordances in Star Designations", Bulletin d'Information du Centre de Données Stellaires, 17 (17): 38, Bibcode:1979BICDS..17...38H
Serpens constellation |
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Stars (list) | |
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Star clusters | |
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Molecular clouds | |
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Nebulae | |
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Galaxies | NGC |
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- 5910
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- 5951
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- 5954
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- 5956
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- 5957
- 5960
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- 5970
- 5972
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- 5977
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- 5991
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- 6003
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- 6012
- 6010
- 6014
- 6020
- 6017
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- 6021
- 6022
- 6023
- 6027
- 6027a
- 6027b
- 6027c
- 6027d
- 6027e
- 6029
- 6033
- 6037
- 6036
- 6051
- 6063
- 6065
- 6066
- 6070
- 6080
- 6100
- 6118
- 6172
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Other | |
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Galaxy clusters | |
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Other |
- GRB 970111
- GRB 050813
- GRB 060418
- GRB 060526
- SN 2004dk
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