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Contains:  IC 435, NGC 2024, NGC 2023, Horsehead nebula, IC 434, IC 432, IC 431, The star Alnitak (ζOri), The star σOri
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Horsehead Nebula region, 


            Shannon Calvert
Horsehead Nebula region

Horsehead Nebula region

Technical card

Imaging telescope or lens:Takahashi FSQ -106ED Takahashi FSQ -106N

Imaging camera:Canon 7D Mark II mod

Mount:Celestron CGEM II

Guiding telescope or lens:Astro-Tech 60mm Guide Scope

Guiding camera:ZWO ASI 120 MM-S


Resolution: 2400x1600

Dates:Dec. 7, 2018Dec. 8, 2018

60x120" ISO800
60x90" ISO800

Integration: 3.5 hours

Darks: ~13

Flats: ~14

Bias: ~80

Avg. Moon age: 0.65 days

Avg. Moon phase: 0.72%

Bortle Dark-Sky Scale: 7.00 job: 2416296

RA center: 85.141 degrees

DEC center: -2.360 degrees

Pixel scale: 2.988 arcsec/pixel

Orientation: 86.515 degrees

Field radius: 1.197 degrees

Locations: The Westport Observatory (WAS), Westport, CT, United States

Data source: Traveller


Last year I got the Horsehead from a dark-ish site, but only for 0.6 hours. This year I was able to throw much more time at it, but through Westport's light polluted sky. The wider field of a Takahashi refractor also helped.



Shannon Calvert
License: None (All rights reserved)

Sky plot

Sky plot


Horsehead Nebula region, 


            Shannon Calvert