NGC 7023 - Iris Nebula in Cepheus

NGC 7023 - Iris Nebula in Cepheus
Object Type: 
A close-up image of NGC 7023 The Iris Nebula, stack of 18x900s bin1 for Luminance - 13x600s bin2 Red - 15x600s bin2 Blue - synthetic green, calibrated and stacked and processed in Pixinsight.

Image Calibration 

Center (RA, Dec): (315.488, 68.148)
Center (RA, hms): 21h 01m 57.190s
Center (Dec, dms): +68° 08' 52.188"
Size: 38.2 x 30.6  arcmin
Radius: 0.408 deg
Pixel scale: 0.873 arcsec/pixel
Orientation: Up is 0.136 degrees E of N


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. (wikipedia)