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Nu Serpentis

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Nu Serpentis
Location of ν Serpentis (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Serpens
Right ascension 17h 20m 49.66149s[1]
Declination −12° 50′ 48.7533″[1]
Apparent magnitude (V) 4.32[2]
Characteristics
Spectral type A2V[3]
U−B color index 0.04[4]
B−V color index 0.03[4]
Astrometry
Radial velocity (Rv) 4.80[5] km/s
Proper motion (μ) RA:  43.40[1] mas/yr
Dec.:  2.61[1] mas/yr
Parallax (π)16.05 ± 0.26 mas[1]
Distance203 ± 3 ly
(62 ± 1 pc)
Absolute magnitude (MV)0.35[2]
Details
Mass2.64[6] M☉
Radius3.0[7] R☉
Luminosity76[6] L☉
Surface gravity (log g)3.95[8] cgs
Temperature9,120[6] K
Metallicity [Fe/H]0.00[9] dex
Rotational velocity (v sin i)123[6] km/s
Age350[10] Myr
Other designations
ν Ser, 53 Serpentis, BD−12°4722, FK5 3376, GC 23424, HD 156928, HIP 84880, HR 6446, SAO 160479, ADS 10481, CCDM J17208-1251A, WDS J17208-1251A, GSC 05653-01431[11]
Database references
SIMBADdata

ν Serpentis, Latinized as Nu Serpentis, is a solitary[10] star in the Serpens Cauda section of the equatorial constellation of Serpens. It is a white-hued star that is faintly visible to the naked eye with an apparent visual magnitude of 4.32.[2] Based upon an annual parallax shift of 16.05 mas as seen from the Sun,[1] it is about 203 light years from the Sun. The star is drifting further away with a radial velocity of 5 km/s.[5]

This is an A-type main-sequence star with a stellar classification of A2V,[3] and is generating energy through hydrogen fusion at its core. It is 350[10] million years old with a high rate of spin, showing a projected rotational velocity of 123 km/s.[6] The star has 2.64[6] times the mass of the Sun and 3.0[7] times the Sun's radius. It is radiating 76 times the Sun's luminosity from its photosphere at an effective temperature of 9,120 K.[6] Nu Serpentis has an optical companion, a magnitude 9.4 star at an angular separation of 46 arcseconds.[12]

References

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  1. ^ 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. Vizier catalog entry
  2. ^ a b c 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. Vizier catalog entry
  3. ^ a b Abt, Helmut A.; Morrell, Nidia I. (1995). "The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars". Astrophysical Journal Supplement. 99: 135. Bibcode:1995ApJS...99..135A. doi:10.1086/192182.
  4. ^ a b Mallama, A. (2014). "Sloan Magnitudes for the Brightest Stars". The Journal of the American Association of Variable Star Observers. 42 (2): 443. Bibcode:2014JAVSO..42..443M.Vizier catalog entry
  5. ^ a b Wilson, R. E. (1953). "General Catalogue of Stellar Radial Velocities". Carnegie Institute Washington D.C. Publication. Carnegie Institution for Science. Bibcode:1953GCRV..C......0W. ISBN 9780598216885. LCCN 54001336.
  6. ^ a b c d e f g Zorec, J.; Royer, F. (2012). "Rotational velocities of A-type stars". Astronomy & Astrophysics. 537: A120. arXiv:1201.2052. Bibcode:2012A&A...537A.120Z. doi:10.1051/0004-6361/201117691. S2CID 55586789. Vizier catalog entry
  7. ^ a b Allende Prieto, C.; Lambert, D. L. (1999). "Fundamental parameters of nearby stars from the comparison with evolutionary calculations: Masses, radii and effective temperatures". Astronomy and Astrophysics. 352: 555–562. arXiv:astro-ph/9911002. Bibcode:1999A&A...352..555A. Vizier catalog entry
  8. ^ David, Trevor J.; Hillenbrand, Lynne A. (2015). "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets". The Astrophysical Journal. 804 (2): 146. arXiv:1501.03154. Bibcode:2015ApJ...804..146D. doi:10.1088/0004-637X/804/2/146. S2CID 33401607. Vizier catalog entry
  9. ^ Gontcharov, G. A. (2012). "Dependence of kinematics on the age of stars in the solar neighborhood". Astronomy Letters. 38 (12): 771–782. arXiv:1606.08814. Bibcode:2012AstL...38..771G. doi:10.1134/S1063773712120031. S2CID 118345778. Vizier catalog entry
  10. ^ a b c De Rosa, R. J.; et al. (2013). "The VAST Survey - III. The multiplicity of A-type stars within 75 pc". Monthly Notices of the Royal Astronomical Society. 437 (2): 1216. arXiv:1311.7141. Bibcode:2014MNRAS.437.1216D. doi:10.1093/mnras/stt1932. S2CID 88503488.
  11. ^ "nu Ser". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-10-04.
  12. ^ Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal. 122 (6): 3466. Bibcode:2001AJ....122.3466M. doi:10.1086/323920. Vizier catalog entry
[edit]
  • Kaler, James B. (July 19, 2013), "Nu Serpentis", Stars, University of Illinois, retrieved 2017-03-31.
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