Beta Serpentis

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search

Template:Short description

β Serpentis
Template:Location mark
Location of β Serpentis (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Serpens
Right ascension Template:RA[1]
Declination Template:DEC[1]
Apparent magnitude (V) +3.65[2] (3.68 + 9.7)[3]
Characteristics
Spectral type A2 V[4] or A2 IV[5] + K3 V[3]
U−B Template:Engvar +0.09[2]
B−V Template:Engvar +0.073[4]
Astrometry
Radial velocity (Rv)Script error: No such module "val".[6] km/s
Proper motion (μ) RA: +65.38[1] mas/yr
Dec.: −38.61[1] mas/yr
Parallax (π)21.03±0.26 mas[1]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)+0.30/+6.59[7]
Details[8]
MassScript error: No such module "val". Template:Solar mass
Radius4.195 (equatorial)
3.07 (polar) Template:Solar radius
LuminosityScript error: No such module "val". Template:Solar luminosity
Surface gravity (log g)3.27[9] cgs
Temperature6,967 (equatorial)
9,359 (polar) K
Rotational velocity (v sin i)Script error: No such module "val". km/s
AgeScript error: No such module "val". Myr
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
Template:Odlist[10]
Database references
SIMBADdata

Script error: No such module "Check for unknown parameters".

Beta Serpentis, Latinized from β Serpentis, also named Zhou,[11] is a binary star[3] system in the constellation Serpens, in its head (Serpens Caput). It is visible to the naked eye with a combined apparent visual magnitude of +3.65.[2] Based upon an annual parallax shift of 21.03 mas as seen from Earth,[1] it is located around 155 light years from the Sun. The system is a member of the Ursa Major Moving Group.[7]

Components

The visual magnitude +3.68 primary, component A, is either an ordinary A-type main-sequence star or somewhat evolved subgiant with a stellar classification of A2 V[4] or A2 IV,[5] respectively. The star is about 610 million years old with 1.8 the mass of the Sun. It is spinning rapidly with a projected rotational velocity of 216.6 km/s, which causes it to have an oblate shape, as well as hotter temperatures in the poles due to gravity darkening. The equatorial radius measures Template:Solar radius and has an effective temperature of 6,967 K, while the polar radius measures Template:Solar radius and has an effective temperature of 9,359 K.[8]

The secondary component, visual magnitude 9.7 B, lies at an angular separation of 30.6 arc seconds. It is a main-sequence star with a class of K3 V.[3]

There is a magnitude +10.98 visual companion, designated component C, located 202 arcseconds away.[12]

Nomenclature

It was a member of the indigenous Arabic asterism al-Nasaq al-Sha'āmī, "the Northern Line" of al-Nasaqān "the Two Lines",[13] along with β Her (Kornephoros), γ Her (Hejian) and γ Ser (Zheng).[14]

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 was the title for three stars: β Ser as Nasak Shamiya I, γ Ser as Nasak Shamiya II, γ Her as Nasak Shamiya III (excluding β Her).[15]

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 β Serpentis, β Herculis, γ Herculis, κ Herculis, γ Serpentis, δ Serpentis, α Serpentis, ε Serpentis, δ Ophiuchi, ε Ophiuchi and ζ Ophiuchi.[16] Consequently, the Chinese name for β Serpentis itself is Script error: No such module "Lang". (Script error: No such module "Lang"., Template:Langx), representing Zhou (周, the dynasty in China),[17][18] together with η Capricorni and 21 Capricorni in Twelve States (asterism).[19]

In R. H. Allen's 1899 book Star Names, this Chinese name was transliterated as Chow,[20] and this spelling has been used into the 21st century,[8] but the pinyin transliteration is Zhou.[21] The IAU Working Group on Star Names approved the name Zhou for this star on 5 December 2024 and it is now so entered in the IAU Catalog of Star Names.[11]

References

<templatestyles src="Reflist/styles.css" />

  1. ↑ a b c d e f Script error: No such module "citation/CS1".
  2. ↑ a b c Script error: No such module "citation/CS1".
  3. ↑ a b c d Script error: No such module "citation/CS1".
  4. ↑ a b c Script error: No such module "citation/CS1".
  5. ↑ a b Script error: No such module "citation/CS1".
  6. ↑ Script error: No such module "citation/CS1".
  7. ↑ a b Script error: No such module "citation/CS1".
  8. ↑ a b c Script error: No such module "citation/CS1".
  9. ↑ Script error: No such module "citation/CS1".
  10. ↑ Template:Cite simbad
  11. ↑ a b Script error: No such module "citation/CS1".
  12. ↑ Script error: No such module "citation/CS1".
  13. ↑ Script error: No such module "citation/CS1".
  14. ↑ Script error: No such module "citation/CS1".
  15. ↑ Script error: No such module "citation/CS1".
  16. ↑ 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.
  17. ↑ 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".
  18. ↑ 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.
  19. ↑ Script error: No such module "citation/CS1".
  20. ↑ Script error: No such module "citation/CS1".
  21. ↑ Script error: No such module "citation/CS1".

Script error: No such module "Check for unknown parameters".

Template:Stars of Serpens

Retrieved from "http://debianws.lexgopc.com/wiki143/index.php?title=Beta_Serpentis&oldid=2074591"