Comet 38P/Stephan-Oterma

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rwilkinson
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Comet 38P/Stephan-Oterma

Post by rwilkinson » Sun Nov 18, 2018 10:38 am

This comet is in Gemini at the moment: 9th magnitude but quite diffuse.
I first managed to detect it in the middle of last month, using my windowsill observatory:
38p_18oct.png
The comet (from my windowsill) on 18th October. 33x 90-sec with 200mm lens at f/6.3.
38p_18oct.png (314.21 KiB) Viewed 1194 times
It didn't rise above the trees until around 1am, so I had to stop up quite late to get this, and then needed my Invisible Comet-Stacker program to process the images.
Then a couple of weeks ago I got some data back from the OU's COAST telescope on Tenerife:
38p_5nov.png
The comet from Tenerife on 5th November. 2x 150-sec with C14 at f/10.
38p_5nov.png (172.63 KiB) Viewed 1194 times
And last night I had another go from my windowsill:
38p_17nov.png
The comet (from my windowsill) on 17th November. 29x 90-sec with 200mm lens at f/6.3.
38p_17nov.png (93.77 KiB) Viewed 1194 times
At least it's clear of the trees by 11pm now, but I still couldn't see the comet on my individual images, so it still counts as an "invisible" comet for now.
Hopefully next month I'll be able to catch it much better using my C8 down in the garden...

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rwilkinson
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Joined: Mon Oct 12, 2009 6:47 pm
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Re: Comet 38P/Stephan-Oterma

Post by rwilkinson » Thu Nov 22, 2018 9:02 am

Last night I managed to get an image of this comet from my garden.
I had to wait until after 11pm for it to clear the trees, and then the bright moonlight reduced the contrast, so I didn't get much of its coma.
38p_21nov.png
Comet 38P on 21-Nov. 15x 90-sec with Atik 16IC on 80mm f/6.
38p_21nov.png (174.74 KiB) Viewed 1154 times

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