Imaging telescopes or lenses: Meade LX200 12" f/10
Imaging cameras: Atik 383L+ mono
Mounts: iOptron CEM 120
Guiding telescopes or lenses: Meade LX200 12" f/10
Guiding cameras: Lodestar
Focal reducers: Starizona SCT Corrector f/7.5
Software: PixInsight · Sequence Generator Pro · PHD guiding · Dithering
Filters: Astronomik B 1.25" Type IIc · Astronomik G 1.25" Type IIc · Astronomik R 1.25" Type IIc · Astronomik Ha 12nm 1.25"
Accessory: Hutech Mitsuboshi OAG5 Guider · Atik EFW2 Filter Wheel · Starizona MicroTouch Autofocuser
Dates:Aug. 14, 2019 , Aug. 15, 2019 , Aug. 16, 2019
Frames:
Astronomik B 1.25" Type IIc: 19x300" -10C bin 1x1
Astronomik G 1.25" Type IIc: 19x300" -10C bin 1x1
Astronomik Ha 12nm 1.25": 43x1200" -10C bin 1x1
Astronomik R 1.25" Type IIc: 20x300" -10C bin 1x1
Integration: 19.2 hours
Darks: ~30
Flats: ~30
Bias: ~100
Avg. Moon age: 14.75 days
Avg. Moon phase: 99.39%
Astrometry.net job: 2865897
RA center: 19h 14' 36"
DEC center: -2° 42' 32"
Pixel scale: 0.511 arcsec/pixel
Orientation: 358.894 degrees
Field radius: 0.235 degrees
Resolution: 2619x2024
Locations: Lighthouse Observatory, Burleson, Texas, United States
Data source: Backyard
This is NGC 6772, a planetary nebula n the constellation of Aquila. (Source: JIM SOLOMON)
NGC 6772 is a small planetary nebula in Aquila. Like other planetary nebula, it represents the remnant of a dying star that is blowing off its outer layers. It is dim (magnitude 12.7) and small (70 x 56"), requiring dark skies, a large aperture to collect scarce photons, steady skies, and precise tracking. (Source: STARDOCTOR)
NGC 6772 is a planetary nebula in the direction of the constellation Aquila . The object was discovered by astronomer William Herschel in 1784 using an 18.6-inch aperture reflector telescope . Due to its moderate apparent magnitude (+12.7), it is visible only with amateur telescopes or higher equipment. (Source: PORTUGUESE WIKIPEDIA)
Mark's note: Not a lot has been written about this object. The above is all I could located on the web.
CAPTURE Information:
The image was captured with the iOptron CEM120 mount , the venerable Meade 12"LX200 SCT, and my Atik 383L+ m CCD at F7.16 (2182mm FL). Image subs were taken through Astronomik's narrowband filter Ha, along with broadband filters R, G and B. Subs were done at 1x1 bin, -10C, at 10 minutes for Ha, and 5 minutes for R, G and B.
IMAGE information -- 2019:
Ha: 43 subs (7.17) on Aug 14th, 15th and 16th.
Red: 20 subs (1.67hr) on Aug 14th and 15th.
Green: 19 subs (1.58hr) on Aug 15th.
Blue: 19 subs (1.58hr) on Aug 15th.
Processing was done with PixInsight, following (for the most part) kayronjm's tutorial of Feb. 24th. Only L was used to develop the Luminance image. R, G and B were collected for the color mix. Narrow band Ha images were combined with the RED subs to make the final red color.
North is to the right (I think), and this is a slight crop due to the misalignment accumulation from so many different filters and times.
COMMENTS:
I am not very pleased with the outcome. I used the technique presented on Harry's Astroshed site for adding the Halpha images to the red images. No knock on Harry; his technique works well and I've used it to success on previous objects. The (my) problem is that the image is dominantly Ha and extremely lightly RG and B. So they contribute very little.
Nevertheless, I was able to show the faint nebula surrounding the bright orangish red ring.
Also, there is a noticeable blue gradient on the upper right hand corner, which I thought I had removed during processing.
Comments