James,

This would be a worthwhile thing to do but a lot of the returns had poor
geometry and the comet would be very faint. Sam Deen has done a search
as reported here:

https://groups.io/g/comets-ml/message/32374

Possibly the most interesting return would have been the 1964 February
perihelion when the geometry was good and the comet could have reached
mag 14.

Elements for each perihelion are given in CBET 5425:

http://www.cbat.eps.harvard.edu/iau/cbet/005400/CBET005425.txt

These can be used to generate an ephemeris for that perihelion passage.

Nick

On 05/08/2024 15:06, James Dawson wrote:
> Nick,
>
> This is a great article, really clever detective work by all involved.
>
> You say no images have been identified for D/1894 F1 (Denning) but I wonder if it has been incidentally captured on any of the sky surveys undertaken since that time on one or more of its returns. It would be a good project for someone to search the various online plate catalogues for the various returns if you have the coordinates for these. I looked through Isaac Roberts' books and he has plenty of photographs from spring 1894 but the fields of view were too narrow to include any of the likely coordinates of the comet during that year.
>
> Regards
>
> James Dawson
>
>
>
>> On 31/07/2024 12:24 BST Nick James <ndj@nickdjames.com> wrote:
>>
>>
>> Hi everyone,
>>
>> I've put a news note on D/1894 F1 (Denning) on the BAA website here:
>>
>> https://britastro.org/section_news_item/dennings-lost-comet-has-been-found
>>
>> Please let me know if you spot any errors!
>>
>> Nick.
>>
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