Iiro's DeepSky Sketches

Name: NGC 7023Other name: OCL 235
RA: 21h 0.5m DEC: +68° 10'
Constellation: CEP
Type: Cluster + nebulosity
Magnitude: 7.1
Size: 5.0'
Classification: E+*
Description: *7 in eF,eL,neby
Notes: H IV 74,Complex structure w Br and dark filaments
Observer: Iiro Sairanen
Location: Miettilä, Rautjärvi, Finland
Date: 3/4.9.2013 23:45
Instrument: Newton 300/1500 mm
Magnification: 71xFilter: -
Field: 57'Seeing: 2
Background sky: 3NE lim mag: 6.6
Visuality: IIHeight: 82°
Weather: +5°C
Description: NGC 7023 itself is a quite bright nebula, but despite of that it's one of the most difficult nebula to observe. The central area is very bright and clearly visible with the direct vision. Instead the surrounding area is quite special because the averted vision shows a lot of faint details. The stars seem to be missing around the nebula. This makes an impression that there are a lot of faint nebulae, but on the other hand it does not appear at all. UHC filter helps a bit with some brighter parts, but the best view is without filters. O-III does not work with this object.
Updated: 5.9.2013 21:00