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Comet C/2018 W2 (Africano) GIF sep 1

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#1 jeanc

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Posted 01 September 2019 - 03:27 AM

Hello

 

Last night i observed C/2018 W2 Africano with my 16"/3.2, The comet is moving faster from day to day. An animation from the 1st of September with 20x3 minutes

Best Regards Michael Jäger

 

https://spaceweather..._1567326164.gif

 

 

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#2 goodricke1

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Posted 01 September 2019 - 05:55 AM

I've really enjoyed your fantastic comet images over the years Michael. Great to see you posting here.

 

Frank.



#3 Aquarellia

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Posted 01 September 2019 - 09:33 AM

Well done !!!

Your gif animation is fantastic.

I follow this comet from week to week since more than one month now.

Michel 



#4 jeanc

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Posted 01 September 2019 - 01:48 PM

Thank you Frank and Michael - now i had finished my LRGB image L-6x3 min RGB 3/3/3 min

Michael

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#5 Tyson M

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Posted 02 September 2019 - 12:51 PM

Excellent work! 



#6 AstroBobo

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Posted 03 September 2019 - 12:59 PM

Wow, great animation!



#7 Lada

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Posted 03 September 2019 - 03:23 PM

Animation of C/2018 W2 (Africano) from 30.8.2019 from Czech republic / Dolní Bousov (backyard), total time = 3h / 240s exposure, N200/1000, Atik 320E mono, bin 2x2:

 

30-08-2019_c-2018-w2-africano_.gif

http://astro.ladisla...2-africano_.gif


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#8 Dave Mitsky

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Posted 04 September 2019 - 01:40 PM

I love the near collision with the asteroid (?) in your image, Lada.


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#9 Rich (RLTYS)

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Posted 04 September 2019 - 06:29 PM

That animation is so cool.bow.gif waytogo.gif



#10 einarin

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Posted 09 September 2019 - 06:57 AM

Missed this.

Really cool animation.

I believe those are hot pixels.



#11 LifeRedeemed

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Posted 09 September 2019 - 08:55 PM

They are hot pixels or reflections. There are a number moving right to left. 



#12 colorspace

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Posted 10 September 2019 - 10:24 AM

I saw the same "lights" moving from right to left, at various brightness levels. Aside from hot pixels on the sensor, I thought that they might also be satellites. But each one seems to move in a perfectly parallel track... which satellites would certainly not follow and even reflections would probably curve.



#13 Dave Mitsky

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Posted 10 September 2019 - 12:19 PM

Satellites, other than geosynchronous and geostationary satellites,  move very quickly across the sky so they can be ruled out in this case.  I didn't notice the other moving points when I first posted here.



#14 Anhydrite

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Posted 14 September 2019 - 10:45 AM

But each one seems to move in a perfectly parallel track... which satellites would certainly not follow 

Actually, some do.

https://flic.kr/p/LyySBk



#15 aa6ww

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Posted 23 September 2019 - 02:57 PM

I had a chance to observe comet C/2018 W2 (Africano) under fairly dark skies this weekend with my C11. I didn't see any color but there was definitely a nice diffused coma making it easy to spot not far from Andromeda.

I also had a look at C/2017 T2 (PANSTARRS.) Both were my goals to observe Saturday night and my reason for being out there.

I'll be trying them both out in my back yard now that the moon is out later now.

...Ralph

Edited by aa6ww, 23 September 2019 - 04:56 PM.

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#16 Bill Barlow

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Posted 24 September 2019 - 11:18 AM

I observed it last night with my 8” Meade SCT and it was small but bright enough to see a faint brighter core.  Might have been a hint of a tail since it wasn’t round but oval and flared.

 

Bill


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#17 ssmith

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Posted 24 September 2019 - 11:24 AM

Here is a video from the evening of the 22nd constructed from 36 still frames.

 

 

Africano video C9 9-22-19


Edited by ssmith, 24 September 2019 - 11:31 AM.

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#18 Zorbathegeek

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Posted 24 September 2019 - 10:31 PM

Thanks to the comet's bright nucleus I was able to observe Africano at 1am this morning through my 6" Dobsonian from my urban back yard. It was at 25 degrees altitude approaching HIP 1480 and 1495. I wasn't able to detect any of the coma due to urban light pollution and the comet was merely stellar-like. Still, It's nice to be able to see a comet in any form from the back deck. Weather permitting, I'm going to drive out to a Bortle 3 area over the next couple of nights/mornings and observe the coma. The COBS averages of the past four nights have this comet at 8.9 magnitude. If you take the average over the past three nights it's 8.8.



#19 colorspace

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Posted 24 September 2019 - 11:10 PM

Actually, some do.

https://flic.kr/p/LyySBk

 

 

I saw the same "lights" moving from right to left, at various brightness levels. Aside from hot pixels on the sensor, I thought that they might also be satellites. But each one seems to move in a perfectly parallel track... which satellites would certainly not follow and even reflections would probably curve.

 

Anhydrite,

 

Point taken, but what I was seeing when zoomed into the amazing animated GIF posted by Lada, showed many, many points moving in perfect parallel tracks. I collapsed the animated GIF in photoshop and expanded the image to illustrate what I was seeing below. Not all of the moving points can be seen as lines, but the brightest ones should clearly be visible.

 

Makes me think hot or warm pixels. 

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  • 30-08-2019_c-2018-w2-africano-flat.jpg


#20 Tapio

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Posted 25 September 2019 - 03:57 AM

Looks more like hot pixels (stacked).



#21 Lada

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Posted 25 September 2019 - 09:10 AM

Dear colleagues those are really hot pixels visible within the animated GIF. Due to slight drifting of the field I had to use the revert-drift function in Virtual Dub called "Window cropper". Then I was able to stabilise somehow the field (i.e. to remove the drift) but the sideeffect are then moving hotpixels against stabilised star filed. I hope I managed to clarify the doubts smile.gif

 

And I am glad you like this timelapse video, thank you.


Edited by Lada, 25 September 2019 - 09:11 AM.


#22 Anhydrite

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Posted 25 September 2019 - 06:30 PM

Yes I agree the dots moving in the gif are just hot pixels.  I never really had any doubt they were anything else.

 

My post was just to point out that some satellites do travel in parallel lines as a correction to this comment.

"But each one seems to move in a perfectly parallel track... which satellites would certainly not follow"

 

The NOSS doubles and triplets have been doing that for over 35 years.  The Chinese satellites have been doing it since 2010.

 

I did enjoy the comet timelapse also.  Thanks for sharing.




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