[BAA Comets] Data for next week (2012 S1)

[Graham Relf]

On 26/11/2013 14:14, Roger Dymock wrote:
> Hi Graham,
>
> At http://britastro.org/computing/applets_ecliptic.html it would appear that I have the option of
> one comet or all of them which makes the chart a little crowded. Would it be possible to include a
> magnitude filter so that only those comets which are within the range of the observer's equipment
> are shown? For example I might want to choose brighter than mag 10 if observing visually or perhaps
> 14 if using a CCD camera.
>
> Regards
>
> Roger Dymock
> Email: roger.dymock at ntlworld.com
> Tel: 023 92647986
> Skype: rogerdymock67 or
> Skype: rjvdymock
> MPC Observatory Code: 940
> Project Alcock http://www.britastro.org/projectalcock/
>
>
> -----Original Message-----
> From: comets-disc-bounces at britastro.org [mailto:comets-disc-bounces at britastro.org] On Behalf Of
> Graham Relf
> Sent: 25 November 2013 15:29
> To: BAA Comets discussion list
> Subject: Re: [BAA Comets] Data for next week (2012 S1)
>
> On 25/11/2013 14:21, Shanklin, Jonathan D. wrote:
>> Hi Graham,
>>
>> I had a quick look, and seems fine.  I'm preparing a talk for tomorrow about comets, and looked at
> the latest chart for 2013 R1.  Unfortunately the stars shown are 10 - 11 mag, when the comet is 5 -
> 6 mag.  The what's observable page also insisted on downloading the latest java, which was a bit
> annoying as I've already  got java running.  It then locked up firefox which was even more annoying.
> The page shows 273P/Pons-Gambart (not visible) but not 2013 R1 (brightest visible comet), and it
> isn't on the list of objects to add either.
>> Regards, Jonathan Shanklin
>>
>> Director Comet Section, British Astronomical Association
>> http://www.ast.cam.ac.uk/~jds
>>
>>
>>
>>
>>
>>
>>
>>
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> Jonathan,
>
> Yes, I have rather left the old What's Observable page behind because it
> causes so many problems now that Java has been made so awkward. Despite
> the fact that we have not finished testing it and there are some known
> glitches, you'll be better off with the new version at
> http://britastro.org/computing/applets_ecliptic.html which does show all
> the latest comets.
>
> I should really switch the links so the new page is the first one people
> get to. Sorry to have caused you bother.
>
> Regards,
> Graham
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Roger,

You have a point, and a useful suggestion. Estimated comet magnitudes 
are of course dubious though! And we may not have data for estimating 
all of them. I'll see what we can do.

Regards,
Graham