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Contains:  NGC 2024, Horsehead nebula, IC 434, NGC 1990, M 42, Great Nebula in Orion, NGC 1976, NGC 1981, Witch Head nebula, IC 2118, The star ηOri, The star ιOri, The star Cursa (βEri), The star Mintaka (δOri), The star Saiph (κOri), The star Alnitak (ζOri), The star Alnilam (εOri), The star Bellatrix (γOri), The star Betelgeuse (αOri), The star Rigel (βOri), Part of the constellation Orion (Ori), Part of the constellation Eridanus (Eri)
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Orion, and the dimming of Betelgeuse

Technical card

Resolution: 3588x4860

Dates:Jan. 10, 2020Jan. 23, 2020Jan. 30, 2020

59x60" ISO3200
20x240" ISO800
37x60" ISO800

Integration: 2.9 hours

Avg. Moon age: 15.90 days

Avg. Moon phase: 42.80%

Bortle Dark-Sky Scale: 2.00 job: 3235019

RA center: 5h 33' 32"

DEC center: -0° 38' 42"

Pixel scale: 16.794 arcsec/pixel

Orientation: 357.551 degrees

Field radius: 14.092

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

Data source: Traveller


This is (one of) the first light images for my new camera and lens. The purpose of the imaging was to better understand the camera system, so the imaging strategy (aperture, and lengths of subs, etc) was not really optimized for obtaining the highest-quality image. However, the final result isn't too bad.

The camera is unmodified. The lens was stopped down to F2.8 for 4-minute subs, and F3.2 for 1-minute subs.

As you know, Betelgeuse is dimming in the last few months. You can compare this image with my old one:
You will see that Betelgeuse was much brighter before.



Wei-Hao Wang
License: None (All rights reserved)


Sky plot

Sky plot


Orion, and the dimming of Betelgeuse, 


            Wei-Hao Wang