Bolton Astronomical Society

Comet 9P - what goes around...
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Author:  rwilkinson [ Tue Mar 29, 2016 7:32 am ]
Post subject:  Comet 9P - what goes around...

Back in 2005, I managed to get an image of faint comet 9P/Tempel, around the time that it was visited by the NASA Deep Impact probe (which blew a small hole in it, to investigate its composition).

Now, eleven years later we're encountering it again on its next orbit. It's only 13th magnitude at the moment, but well-placed in Leo, so I took the opportunity to look for it during last night''s clear spell, whilst trying out two different imaging systems:
File comment: Comet 9P on 28-Mar-2016. 4x 1-min with MX716 on 80ED at f/3.8
9p_80ed_28mar.png [ 247.43 KiB | Viewed 2953 times ]

File comment: Comet 9P on 28-Mar-2016. 5x 1-min with MX716 on C8 at f/4.3
9p_c8_28mar.png [ 200.47 KiB | Viewed 2953 times ]

This is the first time that I've seen a comet twice, on successive orbits.
Here's my picture from 2005 (when it was 10th magnitude):
File comment: Comet 9P in May 2005, using MX5C on C8 at f/3.3
9p_may2005.png [ 109.63 KiB | Viewed 2951 times ]

Author:  rwilkinson [ Fri Apr 01, 2016 8:33 am ]
Post subject:  Re: Comet 9P - what goes around...

I managed a much longer imaging run last night from Bury, with my 70mm refractor mounted on Carl's little NexStar AZ mount.
This comet is still only 13th magnitude, and moving very slowly across the sky (so the background stars have trailed very little over the course of an hour):
File comment: Comet Tempel on 31-Mar. 63x 30-sec with HX916 on 70ED at f/4.1
9p_31mar.png [ 170.02 KiB | Viewed 2904 times ]

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