Deep space
Iris Nebula
Open cluster and nebula · C4 · NGC 7023
Open cluster and nebula in Cepheus
Photo: Hewholooks · CC BY-SA 3.0 · Wikimedia Commons
The Iris Nebula is a bright reflection nebula located about 1,300 light years from Earth in the constellation of Cepheus. The nebula is illuminated by a magnitude +7.4 star designated HD 200775. It is six light-years across. The nebula was discovered in 1794 by Sir William Herschel, an astronomer, where it was then added to the New General Catalogue (NGC).
Description from Wikipedia (CC BY-SA 4.0).
In your sky
Share your location to see where this is in your sky right now.
Key facts
Distance
~1,400 light-years
Apparent mag.
+7
Apparent size
10.0′ × 8.0′
Best seen with
Binoculars
Catalogue
C4 · NGC 7023
Did you know
- Listed as Caldwell 4 in the Caldwell catalogue, also known as NGC 7023.
- Found in the constellation Cepheus.
- Within reach of ordinary binoculars under dark skies.
