Caldwell 4

URI: https://gptkb.org/entity/Caldwell_4
GPTKB entity
Statements (21)
Predicate Object
gptkbp:instanceOf gptkb:open_cluster
gptkbp:alsoKnownAs gptkb:NGC_7023
gptkb:Iris_Nebula
gptkbp:angularSize 18′ × 18′
gptkbp:apparentMagnitude 6.8
gptkbp:catalogue gptkb:Caldwell_catalogue
gptkb:NGC_catalogue
gptkbp:contains gptkb:open_cluster
gptkb:planetary_nebula
gptkbp:declination +68° 10′ 10″
gptkbp:discoveredBy gptkb:William_Herschel
gptkbp:discoveredIn October 18, 1794
gptkbp:distanceFromEarth 1,300 light-years
gptkbp:hasViewOf gptkb:Northern_Hemisphere
https://www.w3.org/2000/01/rdf-schema#label Caldwell 4
gptkbp:locatedIn gptkb:constellation_Cepheus
gptkbp:nestType gptkb:planetary_nebula
gptkbp:notableActor gptkb:HD_200775
gptkbp:rightAscension 21h 01m 35.6s
gptkbp:bfsParent gptkb:NGC_7023
gptkbp:bfsLayer 7