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Two comets in the same field

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#1 Aquarellia

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Posted 07 September 2019 - 01:54 AM

Here are the two comets C/2018 N2 (ASASSN) and 260P (McNaught)

In America, in some hours you must have a shorter separation.

 

260P-2018N2_l.jpg

 

Clear sky to you all

Michel


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#2 Jef De Wit

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Posted 07 September 2019 - 02:08 AM

That's a great catch waytogo.gif 


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#3 Heidescoper

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Posted 07 September 2019 - 09:08 AM

hi all,

 

Michel:

 

You was faster ...

 

Here my sketch from last night :

 

 

 

 

placed in front of my house.

12" f /4 Dobson

 

7.9.2019, 1:15 UT , region SQL 20.9mag

 

The view show the two Schweifsterne (tailstars) , distance between them 25`, through the 12" Dobson V 133x :

 

 

 

 

 

CS

Christian

 

PS:

hope to the see them next night in 18`distance with my 21" Dobson...

 

 

 

 

 

 

 

Attached Thumbnails

  • 20190907x260Pxxx2018N2k.jpg

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#4 Aquarellia

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Posted 07 September 2019 - 09:18 AM

Well done Christian !

Nice sketch.

You did it more than one hour before mine.

I will try again tonight between two stars occultation by asteroids 

 

Michel



#5 Heidescoper

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Posted 07 September 2019 - 10:24 AM

hi all,

 

Michel:

 

Your sketch is again very fine

 

I wait up to our results by next night !

 

 

CS

Christian



#6 Waddensky

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Posted 07 September 2019 - 10:51 AM

Wonderful! That must have been a great sight. Thanks for sharing, Michel and Christian.



#7 flt158

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Posted 07 September 2019 - 12:43 PM

You must all be on Cloud 9!!

What a real privilege!

 

You will both remember this moment for the rest of your days. 

 

I thought I did well when I observed Comet Lovejoy and Almach (Gamma Andromedae) side by side. 

 

Congratulations to Michel and Christian.  

 

Aubrey. 


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#8 niteskystargazer

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Posted 08 September 2019 - 10:19 AM

Michel,

 

Very good catch waytogo.gif .

 

Very good sketch of Two Comets in the same field smile.gif .

 

CS,KLU,

 

thanx.gif ,

 

Tom


Edited by niteskystargazer, 08 September 2019 - 10:21 AM.


#9 Aquarellia

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Posted 08 September 2019 - 10:55 AM

Thank you Jef, Tom the likers and the Waddenzee.

Michel



#10 Aquarellia

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Posted 08 September 2019 - 10:59 AM

You must all be on Cloud 9!!

What a real privilege!

 

You will both remember this moment for the rest of your days. 

 

I thought I did well when I observed Comet Lovejoy and Almach (Gamma Andromedae) side by side. 

 

Congratulations to Michel and Christian.  

 

Aubrey. 

Thank you for your comment Aubrey

 

That's funny the french traduction of "Cloud 9" is "septième ciel" litteraly "7th sky".

 

Michel


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#11 cvnori

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Posted 08 September 2019 - 12:31 PM

I saw similar picture someone took but I am confused.

The location of both comets is almost identical (at least in the same FOV).  This means the tails of both comets should be in the same direction.  Why is there a big angular difference?  Is solar wind direction dependent upon the distance from the sun?

 

Update. Please search picture by T.Pryslavski that shows the tails in different directions.  I am removing his picture I posted earlier due to copyright issues.


Edited by cvnori, 08 September 2019 - 04:16 PM.


#12 Heidescoper

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Posted 08 September 2019 - 12:51 PM

hi all,

 

I had luck, but still at the end of night.

 

The distance between the comets was 22` .

 

8.9.2019, 3:10 UT, Region SQL 20.6mag, twilight beginning

12" Dobson V 133x  

 

 

 

I saw this night only 260P with a short tail.

 

CS

Christian

Attached Thumbnails

  • 20190908x260Pxxx2019N2CNn.jpg

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#13 cvnori

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Posted 08 September 2019 - 04:19 PM

The reason the two comets are having tails in two different directions is due to the fact that one of them is showing gas-ion tail that always points away from the sun.  The other one is showing dust tail that points in the direction of orbital path!  Very interesting pictures.  This is what I figured out after doing some Google search.

 

Or both of them are showing dust tails as they have different orbital paths.


Edited by cvnori, 08 September 2019 - 04:27 PM.


#14 Aquarellia

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Posted 09 September 2019 - 02:07 AM

The reason the two comets are having tails in two different directions is due to the fact that one of them is showing gas-ion tail that always points away from the sun.  The other one is showing dust tail that points in the direction of orbital path!  Very interesting pictures.  This is what I figured out after doing some Google search.

 

Or both of them are showing dust tails as they have different orbital paths.

Hi Ellington

 

I don't think that the ion tails are yet visibles.  But you are right it's a strange behavior. 

For me the reason is probably more simple.

 

The fact is that there is some perspective reason as 260P is 5 light minute from us while C/2018 N2 is 4 time more far : 21 light minute.

However if you look at an image from Jean, here's the link https://www.cloudyni...260-p-mcnaught/

and if you click on the weatheronline link provided, (wait for a while it's a heavy GIF), you will see that the movement of both comets is parallel, for me that means that the movement seen is us, the one of our earth, out of proper comet movement.  So maybe the non paralelism of the tails come from the perspective and the proper comet motion not detected on the GIF.

 

I'm not 100% sure but that can help the idea ?

 

Michel



#15 cvnori

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Posted 09 September 2019 - 07:23 AM

Hmmm.... Michel,
Thanks a lot for the link to the video.
To me both comets seem to be moving in different directions as projected on an infinite plane (2D) and relative motion of earth. The one on left is moving in 1:00 direction and the other on the right is moving in 10:30 direction. I agree that the proper comet motion is not detected in the gifs. I also agree that as the comets are not close to the perihelion and ionic tail is not possible. So based on these facts, it makes me believe that those are dust tails.
Thanks
Chandra

Edited by cvnori, 09 September 2019 - 03:22 PM.


#16 frank5817

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Posted 11 September 2019 - 08:04 PM

Michel and all,

 

Very fine sketching here. Don't see this too often.

 

Frank :)



#17 Uwe Pilz

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Posted 12 September 2019 - 12:49 PM

I saw some photgraphs from our German comet's observers. But sketches are rare. Thank you!


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#18 Warmvet

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Posted 15 September 2019 - 12:45 PM

Michel and Christian

 

Fine capture indeed! I often learn of objects I was not aware of right here. I will hopefully catch these 2 beauties even if not in the same fov. Wonderful!

 

Cindy 


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#19 Heidescoper

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Posted 16 September 2019 - 12:15 AM

hi all,

 

Cindy:

 

fine, good "hunting" !

If You observe under a clear dark sky with Your 12" optic  it should show the two comets with tails.

 

 

CS

Christian


Edited by Heidescoper, 16 September 2019 - 12:16 AM.

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#20 Aquarellia

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Posted 16 September 2019 - 04:08 AM

Michel and Christian

 

Fine capture indeed! I often learn of objects I was not aware of right here. I will hopefully catch these 2 beauties even if not in the same fov. Wonderful!

 

Cindy 

 

 

hi all,

 

Cindy:

 

fine, good "hunting" !

If You observe under a clear dark sky with Your 12" optic  it should show the two comets with tails.

 

 

CS

Christian

Indeed

Here the two last sketches I did about those two fine little comets:

 

260P-20190912_l.jpg C2018N2_20190912_l.jpg

 

By the way, the same night I tried to observe Africano but I did'nt succeed, why ??? Maybe because the comet was in line with some brillant stars ???

However I was able to observe C/2017 T2 (PanSTARRS) for the first time.

 

Clear sky

Michel


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#21 Zorbathegeek

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Posted 16 September 2019 - 05:01 PM

"By the way, the same night I tried to observe Africano but I did'nt succeed, why ??? Maybe because the comet was in line with some brillant stars ???

However I was able to observe C/2017 T2 (PanSTARRS) for the first time."

 

 

I don't know if it's because of the diffuse nature of c/2018 W2 but it does seem to be proving tricky for a lot of observers. Some people are reporting a relatively easy target with an 8" aperture and others are reporting a much more difficult target with considerably larger scopes. It'll be interesting to see some recent submissions to COBS, as there haven't been any since the 9th September.


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#22 pedrovillamiel

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Posted 20 September 2019 - 11:31 AM

Beautiful image of the two kites in "competition". I would have liked to see him, but I am satisfied with your drawings.
Thanks and best regards. Peter



#23 Aquarellia

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Posted 21 September 2019 - 02:23 AM

Indeed in COBS 8.0 and 12.2 the same night!

Thank you Peter

I wanted to sketch C/2018 W2 this morning again but the weather was not cooperative at all

 

Michel




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