Hemisphere:  Southern  ·  Constellation: Orion (Ori)  ·  Contains:  Part of the constellation Orion (Ori)  ·  The star 31Ori  ·  The star 42Ori  ·  The star θ1Ori  ·  The star θ2Ori
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Region around M42 and the Horse Head, 


            Wei-Hao Wang
Region around M42 and the Horse Head
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Region around M42 and the Horse Head

Technical card

Imaging telescopes or lenses: Takahashi TOA 150

Imaging cameras: Pentax 645z Mod

Mounts: Takahashi EM-400 Temma2

Guiding telescopes or lenses: SharpStar 50 ED

Guiding cameras: Fishcamp Starfish

Focal reducers: Takahashi TOA 67 Flattener

Software: PixInsight  ·  RegiStar  ·  Photoshop CC

Dates:Oct. 23, 2017

Frames: 110x480" ISO800

Integration: 14.7 hours

Avg. Moon age: 3.44 days

Avg. Moon phase: 12.77%

Bortle Dark-Sky Scale: 2.00

Basic astrometry details

Astrometry.net job: 3258128

RA center: 5h 37' 45"

DEC center: -3° 50' 49"

Pixel scale: 2.656 arcsec/pixel

Orientation: 359.879 degrees

Field radius: 3.838 degrees

Resolution: 5880x8580

Locations: Mt. Shiao-Shuei (Taiwan), Taichung, Taiwan; Mt. Ho-Huan (Taiwan), Taichung, Taiwan

Data source: Traveller


The 2016/2017 version of exercise for this area of sky.

This is an eight-frame mosaic, plus two additional frames near the center to enhance S/N. This was taken over eight nights between Nov 2016 and Oct 2017.

Ideally, the total exposure should be doubled to reach satisfactory S/N, but it may take another two or three years to achieve this. Will definitely come back to this area in the future.

See it on Gigapan: http://www.gigapan.com/embeds/M6jOuirbv0k/


Sky plot

Sky plot


Region around M42 and the Horse Head, 


            Wei-Hao Wang

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Deep Sky Mosaics
Images of Taiwan