The Orion constellation – it’s one of the best known, easily recognised and most imaged constellations. Orion is unmistakable for:
- its belt of three stars (Mintaka, Alnilam and Alnitak),
- the sword containing the Great Orion Nebula (to right of belt)
- the wide pair of bright stars Rigel (top right), Saiph (lower right), and
- the wide pair of bright stars Bellatrix (in cloud at left) and red super-giant Belelgeuse (near the tree).
The small open cluster just above my neighbour’s tv antenna is Collinder 69.
The camera was tilted slightly, to squeeze the entire constellation into the frame, which is an estimated 39.6° x 27.0° and the clouds were illuminated by a bright, almost full Moon, just outside the frame.
Canon 60D on tripod, with 50mm fixed lens f/1.4, ISO 800, 1.3 second exposure.
And Another Thing…….
Warning: Soapbox alert:
I took the above from my front driveway, where I normally set up my telescope. It was a bonus shot, as I was taking images of the Moon to compare with my new enemy, the powerful LED light my local council recently installed on a taller pole to replace the metal-halide lamp on a shorter pole that was there before. I wanted to estimate how bright it is.
The following two images were taken with identical equipment and settings:
With my cataracts recently removed, I could very clearly see the distinguishing light and dark features of the Moon. I could stare directly at it to my heart’s content, without any discomfort whatsoever (as one would expect). There was no feeling of glariness to cause me to look away.
With the street light – it was far too uncomfortable to look at directly for more than a fraction of a second. Any more would have been potentially detrimental to my eyesight.
The full Moon was about magnitude -12. It’s hard to estimate these things but this street light is many times brighter than the Moon and I reckon the wretched thing – twenty-five metres away – is about magnitude -15 or more.
😎 😎 😎 😎 😎 😎 😎 😎 😎 😎 😎
When you need sun glasses to step outside your front door at night, then you know there’s an unnecessary waste of money and electrical energy, dissipating light everywhere that its not supposed to go.
Also in image: See my image with Astrometry.net annotated overlay.
Images © Roger Powell