Hemisphere:  Southern  ·  Contains:  Flame Nebula  ·  IC 431  ·  IC 432  ·  IC 434  ·  NGC 2023  ·  NGC 2024  ·  Orion B  ·  Part of the constellation Orion (Ori)  ·  The star Alnilam (εOri)  ·  The star Alnitak (ζOri)  ·  The star σOri
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Horsehead Nebula and more, 


            Alf Jacob Nilsen
Horsehead Nebula and more
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Technical card

Imaging telescopes or lenses: Celestron RASA8

Imaging cameras: ZWO ASI ASI2600c

Mounts: iOptron GEM45EC

Guiding telescopes or lenses: ZWO 30mm f/4 Mini Guide Scope

Guiding cameras: ZWO ASI120Mini

Filters: Lumicon Deep Sky Filter

Dates:Jan. 3, 2021Jan. 5, 2021

Lumicon Deep Sky Filter: 106x120" (gain: 100.00) -18C bin 1x1
Lumicon Deep Sky Filter: 63x60" (gain: 100.00) -18C bin 1x1

Integration: 4.6 hours

Flats: ~23

Avg. Moon age: 20.14 days

Avg. Moon phase: 70.23%

Basic astrometry details

Astrometry.net job: 4136158

RA center: 5h 40' 56"

DEC center: -2° 33' 0"

Pixel scale: 8.073 arcsec/pixel

Orientation: 2.316 degrees

Field radius: 2.849 degrees

Resolution: 2000x1568

Locations: Osmundstø Observatorium (private backyard observatory), Hidrasund, Vest Agder, Norway

Data source: Backyard


When I was a teenager (a long time ago:)) and got my first telescope, I wanted to take a colourful photo of the nebulas in orion, especially of the Horsehead nebula. This week end I achieved the goal with the RASA 8 astrograph. Fore once the sky was clear for two nights and Orion showed up in the east late night. Orion is abouth the southernmost I can reach from my backyard observatory. Enjoy...



Alf Jacob Nilsen
License: None (All rights reserved)

Sky plot

Sky plot


Horsehead Nebula and more, 


            Alf Jacob Nilsen