PaEl 1
An extremely faint but intriguing nebula of mystery that was co-discovered by Dana Patchick and David Elmore in January 2022. It is located in Cancer and has a size of 8 arcminutes. One theory is that it is a planetary nebula. An alternative theory is that it is a nova shell around the cataclysmic binary SY Cancri.
UPDATE: This has now been confirmed as a bow-shock shell around the cataclysmic binary SY Cancri. This conclusion was published in the following paper: arxiv.org/abs/2409.06835
UPDATE: This has now been confirmed as a bow-shock shell around the cataclysmic binary SY Cancri. This conclusion was published in the following paper: arxiv.org/abs/2409.06835
TARGET
Nomenclature: PaEl 1
Right Ascension: 09:01:03.32
Declination: +17:53:56.0
EQUIPMENT USED
Twin APM TMB LZOS 152 refractors
Celestron EdgeHD 14"
10Micron GM2000 HPS mount
ASA DDM85 mount
Twin QHYCCD QHY268 MM Pro cameras, QHY600 Pro M camera
Nomenclature: PaEl 1
Right Ascension: 09:01:03.32
Declination: +17:53:56.0
EQUIPMENT USED
Twin APM TMB LZOS 152 refractors
Celestron EdgeHD 14"
10Micron GM2000 HPS mount
ASA DDM85 mount
Twin QHYCCD QHY268 MM Pro cameras, QHY600 Pro M camera
IMAGE CAPTURE
Ha 5nm: 168x300" bin 1x1
OIII 3nm: 195x300" bin 1x1
Red: 17x300" bin 1x1
Green: 18x300" bin 1x1
Blue: 18x300" bin 1x1
Total integration: 34 hours 40 minutes
Pixel scale: 0.647 arcsec/pixel
Field radius: 1.035 degrees
Capture dates: 12 March - 11 April 2024
Capture location: Fregenal de la Sierra, Spain
Ha 5nm: 168x300" bin 1x1
OIII 3nm: 195x300" bin 1x1
Red: 17x300" bin 1x1
Green: 18x300" bin 1x1
Blue: 18x300" bin 1x1
Total integration: 34 hours 40 minutes
Pixel scale: 0.647 arcsec/pixel
Field radius: 1.035 degrees
Capture dates: 12 March - 11 April 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