|
gptkbp:instanceOf
|
gptkb:star
astronomer
|
|
gptkbp:age
|
1.2 billion years
|
|
gptkbp:alsoKnownAs
|
gptkb:Altair
|
|
gptkbp:apparentMagnitude
|
2.21
0.77
|
|
gptkbp:arabicName
|
النسر الطائر (al-nasr al-ṭāʼir)
|
|
gptkbp:BayerDesignation
|
gptkb:Alpha_Aquilae
|
|
gptkbp:catalogueNumber
|
gptkb:BD+08_4236
gptkb:FK5_763
gptkb:GJ_768
gptkb:HD_187642
gptkb:HIP_97649
gptkb:HR_7557
gptkb:LHS_3494
gptkb:PLX_4292
gptkb:SAO_125122
gptkb:GC_27466
gptkb:WDS_J19508+0852A
PPM 131677
|
|
gptkbp:colorIndexB-V
|
+0.08
+0.22
|
|
gptkbp:constellation
|
gptkb:Aquila
|
|
gptkbp:declination
|
+08° 52′ 06″
|
|
gptkbp:diameter
|
1.63 solar radii
|
|
gptkbp:discoveredBy
|
ancient astronomers
|
|
gptkbp:distanceFromEarth
|
16.7 light years
|
|
gptkbp:equatorialCoordinates
|
RA 19h 50m 47s, Dec +08° 52′ 06″
|
|
gptkbp:flatteningRatio
|
1.14
|
|
gptkbp:hasChineseName
|
河鼓二 (Hé Gǔ èr)
|
|
gptkbp:hasExoplanet
|
no
|
|
gptkbp:hasViewOf
|
gptkb:Northern_Hemisphere
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
α Aquilae
|
|
gptkbp:isRotationallyFlattened
|
yes
|
|
gptkbp:JapaneseName
|
彦星 (Hikoboshi)
|
|
gptkbp:luminosity
|
10.6 times solar luminosity
|
|
gptkbp:mass
|
1.79 solar masses
|
|
gptkbp:metallicity
|
−0.2 [Fe/H]
|
|
gptkbp:notableFor
|
one of the closest bright stars to Earth
forms Summer Triangle with Deneb and Vega
|
|
gptkbp:parallax
|
194.95 mas
|
|
gptkbp:partOf
|
gptkb:Summer_Triangle
|
|
gptkbp:properMotionRA
|
385.46 mas/yr
536.82 mas/yr
|
|
gptkbp:rightAscension
|
19h 50m 47s
|
|
gptkbp:rotationPeriod
|
286 km/s
|
|
gptkbp:spectralType
|
gptkb:A7V
|
|
gptkbp:temperature
|
7550 K
|
|
gptkbp:variableStar
|
gptkb:Delta_Scuti_variable
|
|
gptkbp:bfsParent
|
gptkb:Altair
gptkb:牛郎星
|
|
gptkbp:bfsLayer
|
6
|