NGC 281 is an H II region in the constellation of Cassiopeia and part of the Perseus Spiral Arm. It includes the open cluster IC 1590, the multiple star HD 5005, and several Bok globules. Colloquially, NGC 281 is also known as the Pacman Nebula for its resemblance to the video game character.
The nebula was discovered in August 1883 by E. E. Barnard, who described it as "a large faint nebula, very diffuse." The multiple star HD 5005, also called β 1, was discovered by S. W. Burnham. It consists of an 8th-magnitude primary with four companions at distances between 1.4 and 15.7 seconds of arc. There has been no appreciable change in this quintuple system since the first measurements were made in 1875. [Wiki]
Here the SHO rendition using SII, Ha and OIII filters and the Tone Mapping processing.
Ha image provided by Davide Coverta |
|
|
| Optic |
SW Quattro 8S 200mm f/4 with Baader MPCC Mark III corrector |
| Camera |
Atik 383L+ |
| Filters |
Baader 8,5nm OIII |
| Mount |
NEQ6 with EQASCOM
|
Guide
|
SW 70/500 with AlCCD5
|
Frame center
|
RA 00:52:59 DEC 56:37:11 J2000
|
Date
|
Ha 28th September 2014, OIII 4th October 2016
|
Site
|
Backyard, Busto G. Milan, Italy
|
| Exposures
|
Ha 20x900s bin 1x1 @-20°C
OIII 30x600s bin 1x1 @-10°C
Synthetic Green
Integration time - 10h
|
|
|
|
