Tag: Emission nebula

NGC6357 Lobster Nebula

Lobster Nebula is a HII region (giant cloud of excited hydrogen gas) located in constellation Scorpius. The nebula rises only 8° above the horizon in Central Europe, which means, it is submerged in light pollution caused by nearby towns, villages or cities. The situation is completely different on Canary Islands, where the nebula rises 27° above the horizon. Therefore, this nebula was my primary target of my expedition to Fuerteventura. Unfortunately, the weather didn’t cooperated and strong winds caused bad seeing and didn’t allow me to capture more frames. So, next time it will be better.

Technical details:

TelescopeNewton 150/600 mm
Aperture150 mm
Focal length570 mm
MountRainbow Astro RST 135
AutoguidingZWO 174MM, Guidescope 30 mm
CameraZWO 071 Pro @-0°C
CorrectorTS MaxField
Exposure40x180s, Gain 94, bin 1x1,

NGC2264 Cone nebula

Cone nebula is a giant cloud of ionized hydrogen gas, which includes the Christmas Tree Cluster. It’s located between two bright winter stars Betelgeuse (constellation Orion) and Procyon (Canis Minor) and it’s 2700 light-years far from the Solar System. There is a famous picture from Hubble Space telescope of the tip of the cone – star forming complex.

Bi-color picture didn’t look as I expected, therefore I decided to publish only mono version of hydrogen alpha channel.

NGC6820 Nebula

NGC6820 Nebula doesn’t have a name, so let’s call it Hidden octopus nebula (because only one tentacle is visible). Hidden octopus nebula is a giant cloud (50 light years in diameter) of ionized hydrogen alpha gas, where new stars are born. The tentacle forms similar structure just like in more famous M16 Eagle nebula. It’s located in constellation Vulpecula (Little fox) not far from M27 Dumbbell nebula and it’s 6000 light year from Earth.

The picture was processed in bi-color technique. This means: two narrow band pictures, one H alpha and OIII. H alpha inserted into the red channel, OIII into the green and blue one.


NGC 6888 – Crescent Nebula

In an emission nebula located in constellation Cygnus (swan), 5000 light years from Earth. The nebula has 25 light years (!) in diameter. This constellation, as well as the nebula is lying on the plane of our home galaxy Milky Way. Therefore there are so many stars visible.

The picture was processed by bi-color technique – this means that the picture is assembled from two narrow band images: hydrogen alpha (Ha) and ionized oxygen (OIII). Ha was inserted into red channel and OIII into green and blue.