NGC1491 Nebula
NGC1491 Ha OIII SII Nebula
NGC1491 is an emission nebula in Perseus. It is about 10,000 light years away.
Crop
Fullsize
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NGC1491 20min Ha Subframe
NGC1491 20min Ha Subframes x 21 = 420 min combined image
NGC1491 20min OIII Subframe
NGC1491 20min OIII Subframes x 13 = 260 min combined image
NGC1491 20min SII Subframe
NGC1491 20min SII Subframes x 14 = 280 min combined image
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Scope Planewave 17in
Camera Apogee U16
Mount Paramount ME
Filters Astrodon Ha5nm OIII3nm
Exposures Ha 7hrs OIII 4hrs SII 4hrs 20min subs Total 15hrs
Location Sierra Nevada Mountains CA. Heavens Mirror Observatory SRO 2013