Hemisphere:  Northern  ·  Constellation: Vulpecula (Vul)  ·  Contains:  1 Del  ·  1 Sge  ·  1 Vul  ·  10 Del  ·  10 S Sge  ·  10 Vul  ·  11 Cyg  ·  11 Sge  ·  11 del Del  ·  12 Vul  ·  12 gam Sge  ·  12 gam01 Del  ·  12 gam02 Del  ·  12 phi Cyg  ·  13 Del  ·  13 Sge  ·  13 Vul  ·  14 Cyg  ·  14 Sge  ·  14 Vul  ·  15 Cyg  ·  15 Del  ·  15 Sge  ·  15 Vul  ·  16 Vul  ·  16 eta Sge  ·  17 Cyg  ·  17 Lyr  ·  17 Vul  ·  17 tet Sge  ·  And 393 more.
Getting plate-solving status, please wait...
Nikon D800 Astronomik Hydrogen Alpha Clip In Filter Milky Way Sharpless2 79 to 109, 



    
        

            jerryyyyy
Powered byPixInsight

Nikon D800 Astronomik Hydrogen Alpha Clip In Filter Milky Way Sharpless2 79 to 109

Getting plate-solving status, please wait...
Nikon D800 Astronomik Hydrogen Alpha Clip In Filter Milky Way Sharpless2 79 to 109, 



    
        

            jerryyyyy
Powered byPixInsight

Nikon D800 Astronomik Hydrogen Alpha Clip In Filter Milky Way Sharpless2 79 to 109

Imaging telescopes or lenses: Nikon NIKKOR 50mm f/1.4G

Imaging cameras: NIKON D800

Mounts: Astro-Physics Mach1AP GTO CP4

Guiding cameras: SBIG STT 8300M

Software: photoshop  ·  PixInsight  ·  Topaz Denoise AI

Filters: Astronomik Hydrogen Alpha 12nm

Accessory: Moonlite Nitecrawler 3.5  ·  Tolga Astro Alnitak Flat-Man Electroluminescent Flat Fielding Device


Dates:Dec. 9, 2020

Frames:Astronomik Hydrogen Alpha 12nm: 19x180" (57')

Integration: 57'

Avg. Moon age: 23.72 days

Avg. Moon phase: 33.61%


Astrometry.net job: 4076553

RA center: 20h 1' 25"

DEC center: +25° 27' 12"

Pixel scale: 39.410 arcsec/pixel

Orientation: 93.453 degrees

Field radius: 23.882 degrees


Resolution: 3689x2462

Locations: Stanford Faculty Observatory (Bortle 6 SQM 18.6), Stanford, California, United States

Data source: Own remote observatory

Remote source: Non-commercial independent facility

Description

This has been a difficult challenge for me.

I wanted to use this filter to get a very wide field of the Sharpless2 Objects and did get 30 in one shot. I planned to move down the Milky Way and get more, perhaps eventually linking together the images. Making big mosaics with large images like these is problematic due to field distortions.

The D800 is piggy backed to my Stellarvue/Mach 1 main system, and that does the guiding.

The lens is F1.4 but stepped down to reduce (but not eliminate) star distortion.

This was centered on Sh2 93 and 3600s images were taken and would up here:

https://www.astrobin.com/px5iy6/D/

The main problem with the D800 is getting good control files. This image is done with NO control files. Just stacked from one clear night. Despite the help from many Pixinsight experts good flats were impossible to obtain. I think this is because of asymmetrical sky-glow in the big image. I tried pseudoflats and they were not as good as just careful DBE and ABE in PI with noise reduction from Topaz.

The PixInsight saga is found here:

https://pixinsight.com/forum/index.php?threads/flats-problem-with-nikon-d800-and-astronomik-hydrogen-alpha-clip-in-filter.15647/

Comments