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Iris nebula facts for kids

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Iris Nebula
Reflection nebula
Iris Nebula (NGC 7023 and LBN487)
Observation data: J2000.0 epoch
Right ascension 21h 01m 35.60s
Declination +68° 10′ 10.0"
Distance 1,300 ly
Apparent magnitude (V) 6.8
Apparent dimensions (V) 18' x 18'
Constellation Cepheus
Physical characteristics
Radius 3 ly
Designations NGC 7023 and LBN487, Caldwell 4
See also: Lists of nebulae

The Iris Nebula, also NGC 7023 and Caldwell 4, is a bright reflection nebula and Caldwell object in the constellation Cepheus. NGC 7023 is actually the cluster within the nebula, LBN 487, and the nebula is lit by a magnitude +7 star, SAO 19158. It shines at magnitude +6.8. It is located near the Mira-type variable star T Cephei, and near the bright magnitude +3.23 variable star Beta Cephei (Alphirk). It lies 1,300 light-years away and is six light-years across.

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