Re: [guide-user] confusing actual comet data of 21P

Larry Sep 18, 2018

That is one way to solve the 2 comet with same name appearing but it also
eliminates the ability for Guide to include the location of Historic or old comets
that don't appear in the soft02cm.txt file.
So don't bother trying to find comet Halley etc.

The fix Bill posted is a much easier solution than any other.

Larry

On 2018-09-18 1:30 AM, 'Rolf Stadelmaier' rostm@... [guide-user] wrote:
> Hello Bill,
>
> with comet 21P I experienced another somewhat odd effect:
> When 21P is visible in Guide and when zooming in it may happen that the comet disappears at the lower screen border. Then 21P appears at a different position with an offset like the one I described in my earlier post. I found a solution to put this to an end by setting the first line in the file _Guide/asteroid/cometg.dat_ to zero. This because when I delete this file Guide claims: GUIDE needs the GUIDE CD-Rom to run.
> No problem so far. I only thaught to let you know.
>
> Kind regards,
> Rolf Stadelmaier
>
> From: mailto:guide-user@yahoogroups.com
> Sent: Saturday, September 08, 2018 9:22 PM
> To: guide-user@yahoogroups.com
> Subject: Re: [guide-user] confusing actual comet data of 21P
>
>
> Hi Rolf,
>
> I think I've got this figured out. Tom's comment about the file
> being full of HTML code was the key.
>
> A few years ago, MPC switched from plain old unencrypted HTTP traffic
> to "secure" (or at least much more secure) HTTPS traffic. Since then,
> if you asked for an unencrypted page, it would silently switch you over
> to the secure version. Now, it doesn't do that; it'll give you their
> main page instead. Which doesn't have any comet elements in it.
>
> To fix this, download
>
> https://www.projectpluto.com/add_mpc.hee
>
> It should replace an existing file in your Guide folder. _If you don't
> get a warning about replacing a file, you aren't putting it in the
> correct place_.
>
> I think what happened was that when the "correct" file was clobbered
> with meaningless HTML (rather than being updated), Guide fell back on
> the IMCCE data. That data is still useful for older comets, but hasn't
> been updated for a while now; Guide is quite reliant now on the MPC
> file for currently-visible comets.
>
> -- Bill
>
> On 2018-09-06 12:12, 'Rolf Stadelmaier' rostm@... [guide-user] wrote:
>> Hello all,
>>
>> in preparation for observing the comet 21P/Giacobini-Zinner the last night I
>> downloaded the actual MPC comet data in Guide9. When I slewed my telescope
>> to the apropriate coordinates I saw (my camera saw) no comet is present.
>> Further on in a 2-degree neighborhood I found no comet.
>> Later on when I compared backuped comet data from around mid august with
>> these actual data I found that the older trajactory and newer one are
>> parallel postponed to another by -0.54 h in RA and +6.33 ° in Dec - that's a
>> lot.
>> Has anyone else experienced this issue and/or knows what is going on?
>>
>> Best regards from a confused/frustrated observer,
>> Rolf Stadelmaier
>>
>>
>>
>>
>> ------------------------------------
>> Posted by: "Rolf Stadelmaier" <rostm@...>
>> ------------------------------------
>>
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>
>