Gamma Serpentis

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Gamma Serpentis
Observation data
Epoch J2000      Equinox J2000
Constellation Serpens
Right ascension 15h 56m 27.18266s[1]
Declination +15° 39′ 41.8096″[1]
Apparent magnitude (V) 3.85[2]
Characteristics
Spectral type F6 V[2]
U−B color index −0.03[3]
B−V color index +0.48[2]
Variable type Suspected[4]
Distance
36.42 ± 0.07 ly
(11.17 ± 0.02 pc)
Absolute magnitude (MV)3.60[5]
Details
Gyr
LHS 408, SAO 101826[9]
Database references
SIMBADdata

Gamma Serpentis (γ Serpentis, γ Ser) is a

light years from Earth.[1]

Properties

Gamma Serpentis is an ordinary

projected rotational velocity is 10.2[8] km/s, providing a lower limit to the azimuthal rotational velocity along the equator. It is younger than the Sun with an estimated age of 3.5 billion years.[6] The effective temperature of the star's outer atmosphere is 6,300 K,[7] giving it the yellow-white-hued glow of an F-type star.[10]

Occasionally Gamma Serpentis is listed as having two 10th magnitude companions, but it appears that these stars are just

optical neighbours
.

Etymology

It was a member of indigenous Arabic asterism al-Nasaq al-Sha'āmī, "the Northern Line" of al-Nasaqān "the Two Lines",[11] along with β Her (Kornephoros), γ Her (Hejian, Ho Keen) and β Ser (Chow).[12]

According to the catalogue of stars in the Technical Memorandum 33-507 - A Reduced Star Catalog Containing 537 Named Stars, al-Nasaq al-Sha'āmī or Nasak Shamiya were the title for three stars:

Arabic عين الحية ‘Ayn al-Ḥayyah "the Serpent
's Eye".

In

20 Capricorni (according to Ian Ridpath version[18]) in Twelve States
(asterism).

References

  1. ^
    S2CID 244398875
    . Gaia DR3 record for this source at VizieR.
  2. ^
    Bibcode:1990A&AS...85.1015M
  3. Bibcode:1986EgUBV........0M
    .
  4. ^
    doi:10.1086/521575
    .
  5. S2CID 118577511
    .
  6. ^
    ISSN 0004-6361
  7. ^
    ISSN 0004-6361 Gamma Serpentis' database entry at VizieR
    .
  8. ^
    S2CID 118495267
  9. ^ "* gam Ser". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2007-01-23.
  10. Commonwealth Scientific and Industrial Research Organisation, December 21, 2004, archived from the original
    on 2012-03-18, retrieved 2012-01-16.
  11. ISBN 1-931559-44-9
  12. ISBN 0-486-21079-0
    , retrieved 2010-12-12
  13. ^ Jack W. Rhoads - Technical Memorandum 33-507-A Reduced Star Catalog Containing 537 Named Stars, Jet Propulsion Laboratory, California Institute of Technology; November 15, 1971
  14. ISBN 978-986-7332-25-7
    .
  15. ^ Star Names - R.H.Allen p.376
  16. ^ (in Chinese) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 6 月 24 日 Archived 2011-05-22 at the Wayback Machine
  17. ^ (in Chinese) English-Chinese Glossary of Chinese Star Regions, Asterisms and Star Name Archived August 10, 2010, at the Wayback Machine, Hong Kong Space Museum. Accessed on line November 23, 2010.
  18. ^ Ian Ridpath's Startales - Capricornus the Sea Goat
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