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Too Many Aeroplanes

Posted: Thu Jan 03, 2019 5:09 pm
by DRatledge
When you think what a tiny part of the sky a telescope is aiming at then it is amazing how pilots manage to fly their aeroplanes through the field of view. This was 1st January and you would have thought they would have had a day off.

Re: Too Many Aeroplanes

Posted: Fri Feb 15, 2019 7:53 am
by rwilkinson
It's not just the navigation lights - last night there were loads of contrails painting stripes across the sky, and then taking ages to disperse.
They looked quite eye-catching in the moonlight, but were bad news for those trying to detect faint objects beyond Earth's atmosphere. :(

In particular, I was after my first glimpse of 12th magnitude comet 123P/West-Hartley on the northern edge of Leo.
With all the haze and moonlight I decided not to use my LPR filter, and with the bright sky background I had to limit my exposures to 30-sec.
But I could still just make out the comet on each frame, so had no problems stacking 100 of them to produce an image:
Comet 123P on 14-Feb. 100x 30s with Mx716 on C8 at f/3.3
123p_14feb.jpg (72.07 KiB) Viewed 1354 times