Gamma Serpentis
Template:Location mark Location of γ Serpentis (circled) | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Serpens |
| Right ascension | Template:RA[1] |
| Declination | Template:DEC[1] |
| Apparent magnitude (V) | 3.85[2] |
| Characteristics | |
| Spectral type | F6 V[2] |
| U−B Template:Engvar | −0.03[3] |
| B−V Template:Engvar | +0.48[2] |
| Variable type | Suspected[4] |
| Astrometry | |
| Radial velocity (Rv) | Script error: No such module "val".[1] km/s |
| Proper motion (μ) | RA: +311.183 mas/yr[1] Dec.: Script error: No such module "val". mas/yr[1] |
| Parallax (π) | 89.5647±0.1835 mas[1] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Absolute magnitude (MV) | 3.60[5] |
| Details | |
| Mass | Script error: No such module "val".[6] Template:Solar mass |
| Radius | Script error: No such module "val".[7] Template:Solar radius |
| Luminosity | Script error: No such module "val".[7] Template:Solar luminosity |
| Surface gravity (log g) | Script error: No such module "val".[7] cgs |
| Temperature | Script error: No such module "val".[7] K |
| Metallicity [Fe/H] | Script error: No such module "val".[7] dex |
| Rotational velocity (v sin i) | 10.2[8] km/s |
| Age | Script error: No such module "val".[6] Gyr |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| Template:Odlist[9] | |
| Database references | |
| SIMBAD | data |
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Gamma Serpentis (γ Serpentis, γ Ser) is a star in the equatorial constellation Serpens, in the part of the constellation that represents the serpent's head (Serpens Caput). It has an apparent visual magnitude +3.85,[2] which means it is visible to the naked eye. Based upon parallax measurements by the Gaia spacecraft, this star is approximately 36.4 light years from Earth.[1]
Properties
Gamma Serpentis is an ordinary F-type main sequence star with a stellar classification of F6 V, currently fusing atoms of hydrogen into helium at its core.[2] It is 46% larger and 21% more massive than the Sun, with three times the solar luminosity.[7][6] Based upon its mass, it may have a convection zone in its core region.[4] The 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) and β Ser (Zhou).[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: β Ser as Nasak Shamiya I, γ Ser as Nasak Shamiya II, γ Her as Nasak Shamiya III (exclude β Her).[13] The star was later given the proper name Ainalhai, from the Arabic عين الحية ‘Ayn al-Ḥayyah "the Serpent's Eye".Script error: No such module "Unsubst".
In Chinese, Script error: No such module "Lang". (Script error: No such module "Lang".), meaning Right Wall of Heavenly Market Enclosure, refers to an asterism which represents eleven old states in China and which marks the right borderline of the enclosure, consisting of γ Serpentis, β Herculis, γ Herculis, κ Herculis, β Serpentis, δ Serpentis, α Serpentis, ε Serpentis, δ Ophiuchi, ε Ophiuchi and ζ Ophiuchi.[14] Consequently, the Chinese name for γ Serpentis itself is Script error: No such module "Lang". (Script error: No such module "Lang"., Template:Langx), representing the state Zheng (鄭) (or Ching),[15][16][17] together with 20 Capricorni (according to Ian Ridpath version[18]) in Twelve States (asterism).
References
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- ↑ a b c d e f Template:Cite DR3
- ↑ a b c d e Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ a b Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ a b c d Script error: No such module "citation/CS1".
- ↑ a b c d e f g Script error: No such module "citation/CS1". Gamma Serpentis' database entry at VizieR.
- ↑ a b Script error: No such module "citation/CS1".
- ↑ Template:Cite simbad
- ↑ Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ 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
- ↑ Template:In lang 中國星座神話, written by 陳久金. Published by 台灣書房出版有限公司, 2005, Template:ISBN.
- ↑ Star Names - R.H.Allen p.376
- ↑ Template:In lang AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 6 月 24 日 Script error: No such module "webarchive".
- ↑ Template:In lang English-Chinese Glossary of Chinese Star Regions, Asterisms and Star Name Script error: No such module "webarchive"., Hong Kong Space Museum. Accessed on line November 23, 2010.
- ↑ Ian Ridpath's Startales - Capricornus the Sea Goat
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External links
- Gamma Serpentis by Professor Jim Kaler.