Sh2 290 Abell 31

Technical card

Imaging telescope or lens: Astro-Physics RH-305

Imaging camera: SBIG STX 16803

Mount: Astro-Physics 1600GTO

Accessory: Finger Lake Instruments Atlas Focuser

Resolution: 2253x2253

Dates: Jan. 25, 2018, Jan. 26, 2018, March 5, 2018, March 6, 2018

Frames: Astrodon Ha 3nm: 12x1200" Astrodon L, R, G, B: 36x300" Astrodon O-III 3nm: 24x1200"

Integration: 15.0 hours Avg.

RA center: 133.552 degrees

DEC center: 8.906 degrees

Pixel scale: 1.661 arcsec/pixel

Orientation: 181.295 degrees

Field radius: 0.735 degrees