Above: Another effort in November 2020. (Below is from Oct. 2016)
NGC 1491
Located on the edge of a vast cloud of natural gas, about 10,700 light-years away in the constellation Perseus, NGC 1491 is also an H II region (a large, low-density cloud of partially ionized gas in which star formation has recently taken place). Its central star (BD +50 886), is a young blue star with an 11.22 magnitude whose stellar winds are blowing a bubble in the surrounding gas.
Note: The 2020 version at the top is 25 Hours of exposure time: 10 hours Ha + 9 hours SII + 6 hours OIII with FSQ 130ED scope.
Imaging telescopes or lenses: Takahashi FSQ 106ED
Imaging cameras: QSI 6120i
Mounts: Takahashi EM 400 Temma 2
Guiding telescopes or lenses: Takahashi FS 60 CB
Guiding cameras: QHY CCD QHY 5 II
Focal extender: Takahashi QE 1.6x
Software: PHD 2, Pleiades Astrophoto PixInsight , Sequence Generator Pro SGP
Filters: Astrodon Ha 3nm, Astrodon OIII 3nm, Astrodon SII 3nm,
Accessories: Robofocus Focuser, ATIK EFW2
Original Resolution: 1562 x 976
Dates: 28th Oct - 30th Oct '16
Frames:
Astrodon Ha 3nm: 21x1200" bin 2x2
Astrodon OIII 3nm: 21x1200" bin 2x2
Astrodon SII 3nm: 18x1200" bin 2x2
Integration: 20 Hours
Center (RA, Dec):(60.890, 51.319)
Center (RA, hms):04h 03m 33.488s
Center (Dec, dms):+51° 19' 09.932"
Size:39 x 24.4 arcmin
Radius:0.383 deg
Pixel scale:1.5 arcsec/pixel
Orientation:Up is 88.2 degrees E of N
Note: The 2020 version at the top is 25 Hours of exposure time: 10 hours Ha + 9 hours SII + 6 hours OIII with FSQ 130ED scope.
Imaging telescopes or lenses: Takahashi FSQ 106ED
Imaging cameras: QSI 6120i
Mounts: Takahashi EM 400 Temma 2
Guiding telescopes or lenses: Takahashi FS 60 CB
Guiding cameras: QHY CCD QHY 5 II
Focal extender: Takahashi QE 1.6x
Software: PHD 2, Pleiades Astrophoto PixInsight , Sequence Generator Pro SGP
Filters: Astrodon Ha 3nm, Astrodon OIII 3nm, Astrodon SII 3nm,
Accessories: Robofocus Focuser, ATIK EFW2
Original Resolution: 1562 x 976
Dates: 28th Oct - 30th Oct '16
Frames:
Astrodon Ha 3nm: 21x1200" bin 2x2
Astrodon OIII 3nm: 21x1200" bin 2x2
Astrodon SII 3nm: 18x1200" bin 2x2
Integration: 20 Hours
Center (RA, Dec):(60.890, 51.319)
Center (RA, hms):04h 03m 33.488s
Center (Dec, dms):+51° 19' 09.932"
Size:39 x 24.4 arcmin
Radius:0.383 deg
Pixel scale:1.5 arcsec/pixel
Orientation:Up is 88.2 degrees E of N
Sky Plot
