玄戈星

Also known as Xuange, 19 Boötis, HD 125162

star in the constellation Boötes

Astronomical data · SIMBAD

Object type: dS*
Spectral type: A0Va_lB
Distance: 100 light-years
Redshift: z = -0.000005537148650258672
Coordinates: RA 214.0959° · Dec 46.0883°

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via SIMBAD · CDS Strasbourg

Wikidata facts

Distance from Earth: 30.6857
Diameter: 2390000
Radius: 1.7
Mass: 2
Image: Boötes constellation map.svg

Show 16 more facts

spectral class: A0
catalog code: UBV M 20097
stellar rotational velocity: 115
apparent magnitude: 4.169045
parallax: 32.94
effective temperature: 8400
radial velocity: -1.66
metallicity: -2.05
surface gravity: 10000
absolute magnitude: 1.78
color index: 0.08
luminosity: 14.758
right ascension component of proper motion: -187.698
declination component of proper motion: 159.309
right ascension: 214.0959100349329
declination: 46.08830429435917

Sources (8)

via Wikidata · CC0

Article · 中文

牧夫座λ (λ Boo / λ Boötis)，中文名稱為元戈或玄戈，是在牧夫座的一顆恆星。牧夫座λ是一顆白色的A型主序矮星，視星等 +4.18，與地球的距離大約是97.1光年。牧夫座λ是一種已知但罕見、被稱為牧夫座λ型星的原型，這些恆星都是光譜呈現金屬豐度異常低的矮星。他的直徑經過直接測量是太陽的1.7倍。

Abstract from DBpedia / Wikipedia · CC BY-SA