Sh2-78 aka CTSS-3
CTSS-3 was originally cataloged by Stewart Sharpless as an HII region, and is listed as Sh2-78 in his catalog. In 1990, an Italian team used a technique comparing the Palomar Observatory Sky Survey plate used by Sharpless with a new infrared survey plate, also from Palomar, and determined that Sh2-78 is actually a planetary nebula - hence the alternative name CTSS-3 (Cappellaro Turatto Salvadori Sabbadin 3). It is a large, late stage planetary nebula located in Aquila.
CTSS-3 is reported to be at a distance of about 2200 light years and to have a diameter of about 12 arcmin. However, in this image it is evident that besides its intense ”boxy” inner structure it also has a weaker, previously unknown outer structure, extending at least 20 arcmin, giving it an elongated, three-dimensional or moving appearance.
CTSS-3 is reported to be at a distance of about 2200 light years and to have a diameter of about 12 arcmin. However, in this image it is evident that besides its intense ”boxy” inner structure it also has a weaker, previously unknown outer structure, extending at least 20 arcmin, giving it an elongated, three-dimensional or moving appearance.
TARGET
Nomenclature: Sh2-78, CTSS-3
Image Right Ascension: 19:03:10.10
Image Declination: +14:06:58.90
Size: 655 arc seconds
EQUIPMENT USED
Celestron EdgeHD C14
10Micron GM3000 HPS mount
ZWO ASI 6200MM Pro
Nomenclature: Sh2-78, CTSS-3
Image Right Ascension: 19:03:10.10
Image Declination: +14:06:58.90
Size: 655 arc seconds
EQUIPMENT USED
Celestron EdgeHD C14
10Micron GM3000 HPS mount
ZWO ASI 6200MM Pro
IMAGE CAPTURE
Ha 5nm: 570x120" bin 1x1
OIII 3nm: 480x120" bin 1x1
Total integration: 35 hours
Pixel scale: 1.086 arcsec/pixel
Field radius: 0.678 degrees
Capture location: Fregenal de la Sierra, Spain
Ha 5nm: 570x120" bin 1x1
OIII 3nm: 480x120" bin 1x1
Total integration: 35 hours
Pixel scale: 1.086 arcsec/pixel
Field radius: 0.678 degrees
Capture location: Fregenal de la Sierra, Spain
IMAGE PROCESSING
Pre-processing: Pixinsight
Post-processing: Pixinsight, Photoshop CS2
Pre-processing: Pixinsight
Post-processing: Pixinsight, Photoshop CS2