Abell 31 or SH2-290
More recent images HERE
Abell 31 or SH2-290 is an ancient planetary nebula in the constellation of Cancer. It is estimated to be about 2,000 light years away. Although it is one of the largest planetary nebulae in the sky, it is not very bright and in fact I have found it an extremely hard object to image. Its shape is caused by interaction with the interstellar medium, as it is moving through space at high speed. The PN was discovered in 1955 by George Abell on the POSS plates.
Imaging telescopes or lenses: Takahashi FSQ106ED
Imaging cameras: QSI 6120i
Mounts: Takahashi EM 400 Temma 2M
Guiding telescopes or lenses: QHY Mini Guide Scope
Guiding cameras: QHY CCD QHY 5 L II
Software: PHD 2, Pleiades Astrophoto PixInsight , Sequence Generator Pro SGP
Filters: Astrodon 3nm Ha, Astrodon 3nm OIII
Accessories: Robofocus Focuser, ATIK EFW2
Original Resolution: 1656 x 1145
Dates: 15th, 16th, 18th, Mar. '17 plus data from 2016
Frames:
Astrodon 3nm Ha 40 x 1200"
Astrodon 3nm OIII 37 x 1200"
Integration: 25 Hours 40 Min
Center (RA, Dec):(133.553, 8.898)
Center (RA, hms):08h 54m 12.795s
Center (Dec, dms):+08° 53' 54.106"
Size:33.3 x 23 arcmin
Radius:0.337 deg
Pixel scale:1.21 arcsec/pixel
Orientation:Up is 83.8 degrees E of N
Imaging telescopes or lenses: Takahashi FSQ106ED
Imaging cameras: QSI 6120i
Mounts: Takahashi EM 400 Temma 2M
Guiding telescopes or lenses: QHY Mini Guide Scope
Guiding cameras: QHY CCD QHY 5 L II
Software: PHD 2, Pleiades Astrophoto PixInsight , Sequence Generator Pro SGP
Filters: Astrodon 3nm Ha, Astrodon 3nm OIII
Accessories: Robofocus Focuser, ATIK EFW2
Original Resolution: 1656 x 1145
Dates: 15th, 16th, 18th, Mar. '17 plus data from 2016
Frames:
Astrodon 3nm Ha 40 x 1200"
Astrodon 3nm OIII 37 x 1200"
Integration: 25 Hours 40 Min
Center (RA, Dec):(133.553, 8.898)
Center (RA, hms):08h 54m 12.795s
Center (Dec, dms):+08° 53' 54.106"
Size:33.3 x 23 arcmin
Radius:0.337 deg
Pixel scale:1.21 arcsec/pixel
Orientation:Up is 83.8 degrees E of N
Sky Plot
Ha & OIII
