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Contains:  Owl nebula, M 97, NGC 3587
Getting plate-solving status, please wait...
Exafilter Owl Nebula, 


            Edoardo Luca Radi...
Exafilter Owl Nebula

Exafilter Owl Nebula

Technical card

Resolution: 1460x1094

Dates:March 30, 2019

Baader Planetarium Baader B: 21x180" bin 1x1
Baader Planetarium Baader R: 21x180" bin 1x1
Baader Planetarium Baader g: 21x180" bin 1x1
Baader Planetarium Ha 7nm: 32x300" bin 1x1
Baader Planetarium Hb 8.5 nm: 30x300" bin 1x1
Baader Planetarium OIII 8.5nm: 31x300" bin 1x1

Integration: 10.9 hours

Avg. Moon age: 24.23 days

Avg. Moon phase: 28.57%

Mean SQM: 18.50 job: 2677012

RA center: 168.695 degrees

DEC center: 55.019 degrees

Pixel scale: 0.894 arcsec/pixel

Orientation: 196.132 degrees

Field radius: 0.226 degrees

Locations: Castenedolo, Castenedolo, Italy

Data source: Backyard


Imaging from highly light-polluted skies is always a challenge.
RGB imaging is nearly impossible, narrow band imaging cannot reproduce "true" colors of objects...

... or not?

With the right technique one can get narrowband data from selected objects (emission nebulae) and recover star colors from broad band RGB images.

This image comes from the composition of 6 filters: RGB for star colors, H alpha, OIII and H beta for the nebula.

Unfortunately, due to the high Light Pollution, it was impossible to get better data for the dimmer object, but i'm quite happy of the result under a 18.5 mag/arcsec SQM sky



Edoardo Luca Radi...
License: Attribution-NonCommercial-NoDerivs Creative Commons

Sky plot

Sky plot


Exafilter Owl Nebula, 


            Edoardo Luca Radi...

In these public groups

Imagers of Italy
Narrowband imaging