|
gptkbp:instanceOf
|
gptkb:galaxy
|
|
gptkbp:alsoKnownAs
|
gptkb:NGC_6946
gptkb:Caldwell_12
|
|
gptkbp:apparentMagnitude
|
9.6
|
|
gptkbp:apparentSize
|
11.5′ × 9.8′
|
|
gptkbp:catalogue
|
gptkb:Caldwell_catalogue
gptkb:New_General_Catalogue
|
|
gptkbp:constellation
|
gptkb:Cygnus
gptkb:Cepheus
|
|
gptkbp:declination
|
+60° 09′ 14″
|
|
gptkbp:diameter
|
40,000 light-years
|
|
gptkbp:discoveredBy
|
gptkb:William_Herschel
|
|
gptkbp:discoveredIn
|
September 9, 1798
|
|
gptkbp:distanceFromEarth
|
22 million light-years
|
|
gptkbp:galaxyType
|
intermediate spiral galaxy
|
|
gptkbp:groupCluster
|
NGC 6946 group
|
|
gptkbp:hasBar
|
weak bar
|
|
gptkbp:hasUnit
|
light-year
|
|
gptkbp:hasViewOf
|
gptkb:Northern_Hemisphere
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Fireworks Galaxy
|
|
gptkbp:HubbleType
|
SAB(rs)cd
|
|
gptkbp:inclination
|
38°
|
|
gptkbp:locatedIn
|
gptkb:Local_Supercluster
|
|
gptkbp:locatedNear
|
gptkb:Milky_Way
|
|
gptkbp:luminosity
|
low
|
|
gptkbp:mass
|
~3 × 10^10 solar masses
|
|
gptkbp:notableFeature
|
active star formation
rich in gas and dust
numerous H II regions
|
|
gptkbp:notableFor
|
high rate of supernovae
|
|
gptkbp:notableSupernovae
|
gptkb:SN_1917A
gptkb:SN_1939C
gptkb:SN_1948B
gptkb:SN_1968D
gptkb:SN_1969P
gptkb:SN_1980K
gptkb:SN_2002hh
gptkb:SN_2004et
gptkb:SN_2008S
gptkb:SN_2017eaw
|
|
gptkbp:numberOfObservedSupernovae
|
10
|
|
gptkbp:partOf
|
gptkb:Virgo_Supercluster
|
|
gptkbp:radialVelocity
|
40 km/s
|
|
gptkbp:redshift
|
0.000133
|
|
gptkbp:rightAscension
|
20h 34m 52.3s
|
|
gptkbp:signature
|
gptkb:Hubble_Space_Telescope
|
|
gptkbp:starFormationRate
|
high
|
|
gptkbp:bfsParent
|
gptkb:NGC_6946
|
|
gptkbp:bfsLayer
|
7
|