Abell 28
Abell 28 is a 13.5 magnitude planetary nebula in the constellation Ursa Major with very low surface brightness. It has a diameter of about 5.5 arc minutes. The blue central star is slightly offset to the lower right, and there is a shock wave visible on the south east rim. Additionally the surface brightness is lowest in the upper left and brightest in the lower right. All of this suggests that the central star is rapidly moving to the lower right causing the shock wave as the nebula interacts with the interstellar medium.
TARGET
Nomenclature: Abell 28
Right Ascension: 08:41:35.57
Declination: +58:13:48.4
Size: 5 arc minutes
EQUIPMENT USED
Twin APM TMB LZOS 152 refractors, Celestron EdgeHD 14"
10Micron GM2000 HPS, ASA DDM 85 mounts
Twin QHYCCD QHY268 MM Pro and QHYCCD QHY600 MM Pro cameras
Nomenclature: Abell 28
Right Ascension: 08:41:35.57
Declination: +58:13:48.4
Size: 5 arc minutes
EQUIPMENT USED
Twin APM TMB LZOS 152 refractors, Celestron EdgeHD 14"
10Micron GM2000 HPS, ASA DDM 85 mounts
Twin QHYCCD QHY268 MM Pro and QHYCCD QHY600 MM Pro cameras
IMAGE CAPTURE
Ha 5nm: 441x300" bin 1x1, 97x120" bin 1x1
OIII 3nm: 26x300" bin 1x1, 75x120" bin 1x1
Red: 50x120" bin 1x1
Green: 50x120" bin 1x1
Blue: 50x120" bin 1x1
Total integration: 49 hours 39 minutes
Pixel scale: 0.647 arcsec/pixel
Field radius: 0.590 degrees
Capture dates: 26 January - 7 February 2024
Capture location: Fregenal de la Sierra, Spain
Ha 5nm: 441x300" bin 1x1, 97x120" bin 1x1
OIII 3nm: 26x300" bin 1x1, 75x120" bin 1x1
Red: 50x120" bin 1x1
Green: 50x120" bin 1x1
Blue: 50x120" bin 1x1
Total integration: 49 hours 39 minutes
Pixel scale: 0.647 arcsec/pixel
Field radius: 0.590 degrees
Capture dates: 26 January - 7 February 2024
Capture location: Fregenal de la Sierra, Spain
IMAGE PROCESSING
Pre-processing: Pixinsight, CCDStack2
Post-processing: Pixinsight, Photoshop CS2
Pre-processing: Pixinsight, CCDStack2
Post-processing: Pixinsight, Photoshop CS2