Bolton Astronomical Society

Comet C/2015 V2 Johnson
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Author:  rwilkinson [ Fri May 05, 2017 7:19 am ]
Post subject:  Re: Comet C/2015 V2 Johnson

Last night I went out to try my "vintage" 20 year-old CCD camera (a StarlightXpress MX516) with a little focal-reducer which I'd got recently from the Astroboot.
With the bright moonlight I hadn't planned to do any serious imaging, but the sky was clearer than I'd expected, so I decided to have a look for Comet Johnson. But as I'd not rigged up my BlueTooth interface, I had to manually enter its RA & Dec co-ordinates into my Celestron hand-control (under the User objects menu).
File comment: Comet Johnson on 4-May. 32x 60-sec with MX516 on 70ED at f/3.3
c2015v2_4may.png [ 67.89 KiB | Viewed 1209 times ]

Author:  rwilkinson [ Sat May 06, 2017 8:52 am ]
Post subject:  Re: Comet C/2015 V2 Johnson

Another experiment: this time using my Atik 16IC one-shot colour camera on the back of my 70ED refractor:
File comment: Comet Johnson on 5-May. 40x 60-sec with 16IC on 70ED at f/6
johnson_5may.png [ 172.68 KiB | Viewed 1200 times ]
I expect that the comet's tail is much longer than this, but the bright Moonlight made the fainter part impossible to detect.

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