NGC281 is a HII region, which reminds a head of the main character in very popular game from nineties. It is located in constellation Cassiopeia and it 9500 light-year far from us. This nebula was discovered long time ago by Edward Emerson Barnard and it is possible to observe this nebula by reasonable sized telescope under dark skies. Well, I wouldn’t see probably anything, because I live in light polluted area, therefore I had to use narrow band filters, which block the light pollution.
The picture is composed out of 66 narrow band exposures, which means slightly more than one hour per channel. First one is bi-color composition of hydrogen and oxygen, the others are in Hubble palette (hydrogen in green, oxygen in blue and sulfur in red).
|Telescope:||Newton 254/1000 mm|
|Focal length:||1000 mm|
|Autoguiding||TS 60 mm, ZWO 174 MM|
|Camera:||Moravian instruments G2 8300M @-30C|
|Corrector:||GPU coma corrector|
|Filters:||Baader narrow band|
|Exposure:8x||22xHa, 22xOIII, 22xSII 180 s, bin 1x1,|