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Can't see comets in Cartes du Ciel

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8 replies to this topic

#1 kite55surfer

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Posted 18 April 2021 - 10:29 PM

Hi all,

 

I am a newbie with CDC and can't find a way to display comets.

I go to: Setup/Solar System/Comet/Load MPC file, download (apply, ok) but it doesn't display any comet in the chart.

 

I am sure not doing it right, but how to do it then?

 

Thanks in advance.



#2 SteveInNZ

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Posted 18 April 2021 - 11:58 PM

Did you do Chart/Show Objects/Comets (or click the comet button) ?

 

Steve.



#3 kite55surfer

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Posted 19 April 2021 - 09:42 AM

Did you do Chart/Show Objects/Comets (or click the comet button) ?

 

Steve.

Yes I did.

Thanks Steve



#4 obrazell

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Posted 19 April 2021 - 11:52 AM

It may be that there are no comets bright enough to be shown. There are no bright comets around at the moment.



#5 obrazell

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Posted 19 April 2021 - 11:56 AM

you might also try setting it as display as symbol rather than proportional to tail length.



#6 kite55surfer

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Posted 19 April 2021 - 12:16 PM

you might also try setting it as display as symbol rather than proportional to tail length.

Thanks. I tried both



#7 kite55surfer

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Posted 19 April 2021 - 12:17 PM

It may be that there are no comets bright enough to be shown. There are no bright comets around at the moment.

That may be it. Thanks



#8 SteveInNZ

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Posted 19 April 2021 - 04:34 PM

Set the time to around 4am and search for C/2020 R4 (ATLAS). It's Mag 9.8 at the moment and shows up as a symbol for me.

If it finds it and shows the label, at least you know that the data is there and it's a display/symbol related issue.

I can find Halley at Mag 34.9. It shows a label (if it's above the horizon) but no symbol.

 

Also, in Setup/Solar System/Comet/General Settings are some display settings that you may have overlooked. Show comets on chart and show comets X magnitudes fainter than stars. If you've wound the stars back to just show bright ones, you may not meet that criteria to show comets.

I have the value set at 4 magnitudes fainter.

 

Steve.



#9 kite55surfer

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Posted 19 April 2021 - 05:24 PM

Set the time to around 4am and search for C/2020 R4 (ATLAS). It's Mag 9.8 at the moment and shows up as a symbol for me.

If it finds it and shows the label, at least you know that the data is there and it's a display/symbol related issue.

I can find Halley at Mag 34.9. It shows a label (if it's above the horizon) but no symbol.

 

Also, in Setup/Solar System/Comet/General Settings are some display settings that you may have overlooked. Show comets on chart and show comets X magnitudes fainter than stars. If you've wound the stars back to just show bright ones, you may not meet that criteria to show comets.

I have the value set at 4 magnitudes fainter.

 

Steve.

Yes I did find it. So it is working (I had it as 4 as well)

Thanks Steve!


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