Tag: H II nebula

NGC 6888 Crescent Nebula

Crescent Nebula, also known as NGC 6888, is a HII region, hot ionized hydrogen gas cloud. The nebula got the shape by high speed stellar wind of Wolf-Rayet star, which is colliding with slow moving mass, ejected by this star during transformation into a red giant. The nebula is approximately 5000 light-years away from us and it can be located in constellation Cygnus.

The picture is the last one from 6.9.2018. In the evening I captured Omega nebula, M80. As a last deep space object I pointed on Crescent Nebula, started auto guiding and went to sleep. Therefore the picture is a stack of 64 pictures; each has 3 minutes of exposure time, thus total integration time 192 minutes.

Technical details:

TelescopeNewton 150/600 mm
Aperture150 mm
Focal length660 mm
MountiOptron CEM25P
AutoguidingQHYCCD miniGuideScope 130 mm f/4.3, ZWO 174 MM
CameraZWO 071 Pro @-10C
CorrectorExplore Scientific HR coma corrector
FiltersAstronomik L-1 - UV IR Block Filter
Exposure64x180s, Gain 134, bin 1x1,

NGC7380 Wizard nebula

Wizard nebula is an open cluster associated with nebulosity.  Visually, it has apparent size of the full Moon, but since it’s very far from the Earth (7200 light years), its real diameter is about 100 light years.

So, where is the wizard located? It took me a while to find him, but if you turn your head 90° counter-clockwise, you see two darker hands. It looks like he is trying to grab something. Then above the hands you see the wizard’s conical hat.

First picture is a composition of 3 narrow band pictures (Ha, OIII and SII) and composed in Hubble Space Telescope palette. Second one is more-or less visible spectrum.

ngc7380-wizard-2016-10-06-30c-600s-32x-haoiiisii-fl1000-dbe-proc ngc7380-wizard-2016-10-06-30c-600s-32x-haoiiisii-fl1000-dbe-rgbeq