|
gptkbp:instanceOf
|
gptkb:star
gptkb:asteroid
|
|
gptkbp:age
|
1.2 billion years
|
|
gptkbp:apparentMagnitude
|
2.21
0.77
|
|
gptkbp:arabicName
|
النسر الطائر (al-nasr al-ṭāʼir)
|
|
gptkbp:BayerDesignation
|
gptkb:Alpha_Aquilae
|
|
gptkbp:catalogueNumber
|
gptkb:Gliese_768
gptkb:BD+08_4236
gptkb:HD_187642
gptkb:HIP_97649
gptkb:HR_7557
gptkb:SAO_125122
|
|
gptkbp:companionStars
|
none known
|
|
gptkbp:constellation
|
gptkb:Aquila
|
|
gptkbp:culturalSignificance
|
featured in Qixi Festival
featured in Tanabata festival
featured in Western folklore
|
|
gptkbp:declination
|
+08° 52′ 06″
|
|
gptkbp:diameter
|
1.63 solar radii
|
|
gptkbp:discoveredBy
|
ancient astronomers
|
|
gptkbp:distanceFromEarth
|
16.7 light years
|
|
gptkbp:eclipticLatitude
|
-16.2°
|
|
gptkbp:equatorialBulge
|
~20% larger than polar radius
|
|
gptkbp:flattenedShape
|
oblate spheroid
|
|
gptkbp:galacticLatitude
|
-8.91°
47.70°
|
|
gptkbp:hasChineseName
|
牛郎星 (Niú Láng Xīng)
|
|
gptkbp:hasExoplanet
|
no confirmed exoplanets
|
|
gptkbp:hasViewOf
|
gptkb:Northern_Hemisphere
|
|
gptkbp:heliumContent
|
normal
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Altair (star)
|
|
gptkbp:hydrogenFusion
|
gptkb:main_sequence
|
|
gptkbp:JapaneseName
|
彦星 (Hikoboshi)
|
|
gptkbp:luminosity
|
10.6 times Sun
|
|
gptkbp:mass
|
1.79 solar masses
|
|
gptkbp:metallicity
|
-0.2 [Fe/H]
|
|
gptkbp:nearestBrightStars
|
gptkb:Vega
gptkb:Deneb
|
|
gptkbp:notableFor
|
rapid rotation
|
|
gptkbp:parallax
|
194.95 mas
|
|
gptkbp:partOf
|
gptkb:Milky_Way
gptkb:Summer_Triangle
|
|
gptkbp:properMotionRA
|
385.46 mas/yr
536.82 mas/yr
|
|
gptkbp:rightAscension
|
19h 50m 47s
|
|
gptkbp:rotationPeriod
|
286 km/s
~9 hours
|
|
gptkbp:spectralType
|
gptkb:A7V
|
|
gptkbp:surfaceGravity
|
4.13 (log g)
|
|
gptkbp:temperature
|
7,700 K
|
|
gptkbp:variableStar
|
gptkb:Delta_Scuti_variable
|
|
gptkbp:英文名
|
Αετός (Aetós)
|
|
gptkbp:bfsParent
|
gptkb:Tanabata_Festival
|
|
gptkbp:bfsLayer
|
5
|