StDr 81
StDr 81 is a candidate planetary nebula in the constellation Lyra found by Marcel Drechsler and Xaver Strottner in July 2020 by examining the MDW Survey H-alpha data. As it had never been imaged in other wavelengths I decided to take a deeper look at it. The morphology does not appear typical of a that of a planetary nebula. Furthermore there is no trace of OIII signal despite 11 hours of data capture. This suggests that StDr 81 is more likely to be ionised interstellar medium rather than a true planetary nebula.
TARGET
Nomenclature: StDr 81
Right Ascension: 18:20:13.82
Declination: +34:21:08.70
EQUIPMENT USED
Twin APM TMB LZOS 152 refractors
Celestron EdgeHD 14"
10Micron GM2000 HPS mount
ASA DDM85 mount
Twin QHYCCD QHY268 MM Pro cameras
QHYCCD QHY600 Pro M camera
Nomenclature: StDr 81
Right Ascension: 18:20:13.82
Declination: +34:21:08.70
EQUIPMENT USED
Twin APM TMB LZOS 152 refractors
Celestron EdgeHD 14"
10Micron GM2000 HPS mount
ASA DDM85 mount
Twin QHYCCD QHY268 MM Pro cameras
QHYCCD QHY600 Pro M camera
IMAGE CAPTURE
Ha 5nm: 105x300" bin 1x1
OIII 3nm: 92x300" bin 1x1, 103x120" bin 1x1
Red: 32x300" bin 1x1
Green: 30x300" bin 1x1
Blue: 29x300" bin 1x1
Total integration: 27 hours 26 minutes
Pixel scale: 0.648 arcsec/pixel
Field radius: 0.429 degrees
Capture dates: 2 April- 2 June 2024
Capture location: Fregenal de la Sierra
Ha 5nm: 105x300" bin 1x1
OIII 3nm: 92x300" bin 1x1, 103x120" bin 1x1
Red: 32x300" bin 1x1
Green: 30x300" bin 1x1
Blue: 29x300" bin 1x1
Total integration: 27 hours 26 minutes
Pixel scale: 0.648 arcsec/pixel
Field radius: 0.429 degrees
Capture dates: 2 April- 2 June 2024
Capture location: Fregenal de la Sierra
IMAGE PROCESSING
Pre-processing: Pixinsight, CCDStack2
Post-processing: Pixinsight, Photoshop CS2
Pre-processing: Pixinsight, CCDStack2
Post-processing: Pixinsight, Photoshop CS2