Si 1-2
Si 1-2 is an enigmatic planetary nebula that has, to my knowledge, never been imaged before other than appearing on sky surveys.
It was discovered by Gisela Strigl in 1996.
It is relatively small at 60 arc seconds, and reasonably bright as this was captured by moonlight.
A Google search turns up no information about it,
Spectroscopy wasn't performed until 15/05/2016 by the OSIRIS instrument.
Osiris is the Optical System for Imaging and low-Intermediate-Resolution Integrated Spectroscopy at the world's largest single-aperture optical telescope (the Gran Telescopio Canarias - a 10.4 m reflecting telescope located at the Roque de los Muchachos Observatory on the island of La Palma, in the Canaries, Spain).
This confirmed that Si 1-2 is a true planetary nebula.
My thanks to Sakib Rasool for suggesting this target.
It was discovered by Gisela Strigl in 1996.
It is relatively small at 60 arc seconds, and reasonably bright as this was captured by moonlight.
A Google search turns up no information about it,
Spectroscopy wasn't performed until 15/05/2016 by the OSIRIS instrument.
Osiris is the Optical System for Imaging and low-Intermediate-Resolution Integrated Spectroscopy at the world's largest single-aperture optical telescope (the Gran Telescopio Canarias - a 10.4 m reflecting telescope located at the Roque de los Muchachos Observatory on the island of La Palma, in the Canaries, Spain).
This confirmed that Si 1-2 is a true planetary nebula.
My thanks to Sakib Rasool for suggesting this target.
TARGET
Nomenclature: Si 1-2
Right Ascension: 19:06:07.2
Declination: +27:12:58.50
Size: 60 arc seconds
Discovery: Gisela Strigl in 1996
EQUIPMENT USED
Twin APM TMB LZOS 152 refractors
10Micron GM2000 HPS mount
Twin QSI6120 CCD cameras
Astrodon filters
IMAGE CAPTURE
OIII 3nm: 53x900" bin 1x1
Ha 5nm: 53x900" bin 1x1
Red: 13x300 bin 1x1
Green: 14x300 bin 1x1
Blue: 12x300 bin 1x1
Total integration: 29 hours 45 minutes
Pixel scale: 0.530 arcsec/pixel
Field radius: 0.250 degrees
Capture dates: 28 July - 2 August 2023
Capture location: Fregenal de la Sierra, Spain
OIII 3nm: 53x900" bin 1x1
Ha 5nm: 53x900" bin 1x1
Red: 13x300 bin 1x1
Green: 14x300 bin 1x1
Blue: 12x300 bin 1x1
Total integration: 29 hours 45 minutes
Pixel scale: 0.530 arcsec/pixel
Field radius: 0.250 degrees
Capture dates: 28 July - 2 August 2023
Capture location: Fregenal de la Sierra, Spain
IMAGE PROCESSING
Pre-processing: CCDStack2
Post-processing: Photoshop CS2
Pre-processing: CCDStack2
Post-processing: Photoshop CS2
Ha image:
OIII image:
