|
gptkbp:instanceOf
|
gptkb:star
|
|
gptkbp:alsoKnownAs
|
gptkb:61_Cygni
|
|
gptkbp:apparentMagnitude
|
5.20 (combined)
|
|
gptkbp:binarySeparation
|
about 84 AU
|
|
gptkbp:catalogueNumber
|
gptkb:Gliese_820
gptkb:HD_201091_(A)
gptkb:HD_201092_(B)
gptkb:61_Cygni
|
|
gptkbp:component
|
gptkb:Gliese_820_B
gptkb:Gliese_820_A
|
|
gptkbp:containsPlanet
|
no confirmed planets
|
|
gptkbp:declination
|
+38° 44′ 57″
|
|
gptkbp:diameter
|
0.595 R☉ (B)
0.665 R☉ (A)
|
|
gptkbp:discoveredBy
|
gptkb:James_Bradley
|
|
gptkbp:discoveredIn
|
1753
|
|
gptkbp:distanceFromEarth
|
11.4 light years
|
|
gptkbp:epoch
|
gptkb:J2000
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Gliese 820
|
|
gptkbp:locatedIn
|
gptkb:constellation_Cygnus
|
|
gptkbp:luminosity
|
0.085 L☉ (B)
0.15 L☉ (A)
|
|
gptkbp:mass
|
0.63 M☉ (B)
0.70 M☉ (A)
|
|
gptkbp:metallicity
|
[Fe/H] ≈ -0.2
|
|
gptkbp:nearestHigherNeighbor
|
gptkb:Ross_248
|
|
gptkbp:nearestNeighborDistance
|
3.3 light years (to Ross 248)
|
|
gptkbp:notableFor
|
high proper motion
|
|
gptkbp:orbitType
|
about 659 years
|
|
gptkbp:parallax
|
286.82 mas
|
|
gptkbp:properMotionRA
|
5.2 arcseconds/year
|
|
gptkbp:rightAscension
|
21h 06m 53.9s
|
|
gptkbp:spectralType
|
gptkb:K7V_(Gliese_820_B)
K5V (Gliese 820 A)
|
|
gptkbp:temperature
|
4000 K (B)
4450 K (A)
|
|
gptkbp:variableStar
|
gptkb:V420_Cygni
|
|
gptkbp:bfsParent
|
gptkb:61_Cygni
|
|
gptkbp:bfsLayer
|
7
|