|
gptkbp:instanceOf
|
gptkb:galaxy
|
|
gptkbp:alsoKnownAs
|
gptkb:Messier_101
gptkb:M101
|
|
gptkbp:apparentMagnitude
|
7.86
|
|
gptkbp:apparentSize
|
28.8′ × 26.9′
|
|
gptkbp:catalogue
|
gptkb:Messier_Catalogue
gptkb:NGC_Catalogue
|
|
gptkbp:constellation
|
gptkb:Ursa_Major
|
|
gptkbp:declination
|
+54° 20′ 57″
|
|
gptkbp:diameter
|
170,000 light-years
|
|
gptkbp:discoveredBy
|
gptkb:Pierre_Méchain
|
|
gptkbp:discoveredIn
|
March 27, 1781
|
|
gptkbp:distanceFromEarth
|
21 million light-years
|
|
gptkbp:galaxyType
|
face-on spiral galaxy
|
|
gptkbp:groupCluster
|
gptkb:M101_Group
|
|
gptkbp:hasSupernova
|
gptkb:SN_1909A
gptkb:SN_1951H
gptkb:SN_1970G
gptkb:SN_2011fe
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
NGC 5457
|
|
gptkbp:locatedIn
|
gptkb:Local_Supercluster
|
|
gptkbp:luminosity
|
low
|
|
gptkbp:metallicity
|
low
|
|
gptkbp:morphologicalType
|
SAB(rs)cd
|
|
gptkbp:notableFeature
|
large H II regions
prominent spiral arms
|
|
gptkbp:notableFor
|
grand design spiral structure
large number of H II regions
studies of star formation
|
|
gptkbp:notablePlace
|
gptkb:NGC_5455
gptkb:NGC_5458
gptkb:NGC_5461
gptkb:NGC_5462
gptkb:NGC_5471
|
|
gptkbp:redshift
|
0.000804
|
|
gptkbp:rightAscension
|
14h 03m 12.6s
|
|
gptkbp:satelliteGalaxies
|
gptkb:NGC_5204
gptkb:NGC_5474
gptkb:NGC_5477
gptkb:NGC_5585
gptkb:UGC_8837
gptkb:UGC_9405
|
|
gptkbp:starFormationRate
|
high
|
|
gptkbp:bfsParent
|
gptkb:Messier_101
gptkb:M101
gptkb:Pinwheel_Galaxy
|
|
gptkbp:bfsLayer
|
7
|