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gptkbp:instanceOf
|
red hypergiant star
|
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gptkbp:apparentMagnitude
|
16.6
|
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gptkbp:catalogueNumber
|
gptkb:BD+37_3871
2MASS J20254476+3807142
G075.7642+00.3437
IRAS 20234+3757
IRC+40448
|
|
gptkbp:declination
|
+38° 07′ 14″
|
|
gptkbp:diameter
|
~1,640 solar radii
|
|
gptkbp:discoveredBy
|
Neugebauer, Martz, Leighton
|
|
gptkbp:discoveredIn
|
1965
|
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gptkbp:distanceFromEarth
|
~5,250 light-years
|
|
gptkbp:evolutionaryStage
|
late stage stellar evolution
|
|
gptkbp:expectedFate
|
supernova
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
NML Cygni
|
|
gptkbp:locatedIn
|
gptkb:Cygnus_constellation
|
|
gptkbp:luminosity
|
~300,000 times Sun
|
|
gptkbp:mass
|
~40 solar masses
|
|
gptkbp:metallicity
|
near solar
|
|
gptkbp:notableFor
|
one of the largest known stars
extreme mass loss rate
surrounded by thick circumstellar envelope
|
|
gptkbp:otherName
|
V1489 Cygni
|
|
gptkbp:parallax
|
0.12 mas
0.62 mas
|
|
gptkbp:properMotionRA
|
-4.59 mas/yr
-1.55 mas/yr
|
|
gptkbp:radialVelocity
|
-1.0 km/s
|
|
gptkbp:rightAscension
|
20h 25m 44.8s
|
|
gptkbp:spectralType
|
gptkb:M6
|
|
gptkbp:temperature
|
~3,400 K
|
|
gptkbp:variableStar
|
semiregular variable
V1489 Cygni
|
|
gptkbp:bfsParent
|
gptkb:NML
|
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gptkbp:bfsLayer
|
7
|