553 replies to this topic

[emh52]

A month later still nice !  even with the full Moon

 

https://flic.kr/p/2quBZwn

 

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[markalot63]

I was only able to grab 15 minutes during 17 minutes of clear skies.   Unfortunately I had a narrowband filter in (HA, OII) so colors are a bit wonky.

 

[Tapio]

It's still nice mag 8 comet with 1 degree tail.

Imaged it last night, 18x1m RGB with Esprit 100.

 

 

[Jon Isaacs]

Purely visual.. 

 

Currently I am our place in San Diego, light pollution central..  Magnitude 18.2 overhead, 17.9mpsas in the region of the comet.  

 

Saturday night I would unable to detect the comet in my 4 inch refractor.. Last night, it was a small fuzzy spot with the hint of a tail in the 12. inch... 

 

I never got to see it at it's brightest from dark skies.. I was stuck at home.  A nice binocular object even from light polluted skies.

 

Jon

 

P.S.  Nice photos

[emh52]

It appears that 2023 A3 has had an outburst. Most of the tail is gone in this RASA image (iTelescope T68) and there is a green dicarbon emission almost completely surrounding the nucleus

dicarbon has a short life only 2-3 h so the dicarbon must be very recent. The comet had a more substantial tail just yesterday.

 

https://flic.kr/p/2qv54gp

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[Tapio]

Interesting (if there was an outburst so far away from sun).
Must have a go tonight.

[Sky King]

It appears that 2023 A3 has had an outburst. Most of the tail is gone in this RASA image (iTelescope T68) and there is a green dicarbon emission almost completely surrounding the nucleus

dicarbon has a short life only 2-3 h so the dicarbon must be very recent. The comet had a more substantial tail just yesterday.

 

From 4-17-24 and 4-18-24, still has the tail but the green is showing. These are raw single files, changed from fits to jpg.  

 

4-17-24:

 

Edited by Sky King, 19 November 2024 - 11:07 AM.

[Sky King]

And one from 4-18-24. which was last night:

 

 

 

[Tapio]

It appears that 2023 A3 has had an outburst. Most of the tail is gone in this RASA image (iTelescope T68) and there is a green dicarbon emission almost completely surrounding the nucleus

dicarbon has a short life only 2-3 h so the dicarbon must be very recent. The comet had a more substantial tail just yesterday.

 

I'm not sure if there actually was an outburst.

Haven't seen other images that would confirm it.

Maybe it was just a short exposure thing?

 

Anyway I imaged the comet again last night and it looked the same as I imaged it the 17th.

A tail of about 1,5 degrees at least.

 

Here's RGB image.

 

And longer L (5x2m).

Edited by Tapio, 20 November 2024 - 05:44 AM.

[markalot63]

A little over an hour last night.  Did a little processing with what data I had.  Looks the same to me, I just wish I had more time to bring the red out in the background.  Overprocessed, so don't look too close.   

 

Edited by markalot63, 20 November 2024 - 09:51 AM.

[emh52]

I'm not sure if there actually was an outburst.

Haven't seen other images that would confirm it.

Maybe it was just a short exposure thing?

 

Anyway I imaged the comet again last night and it looked the same as I imaged it the 17th.

A tail of about 1,5 degrees at least.

 

Here's RGB image.

 

And longer L (5x2m).

yes my outburst image  is a bad image wrong file / stack , your image is correct and nice !-  this corrected image is a side  by side stack of nov 18-20 that by processing all together yields tail cutoff- but the central body can be better compared day to day. From our Earth perspective the comet is moving across the sky slowly 

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Edited by emh52, 21 November 2024 - 09:53 AM.

[Cosmo Geezer]

From the Mollie Brown Observatory 11/20/24 . . . Comet C/2023 A3. Distance from Earth 153,476,820 miles. Distance from Sun 120,522,399 miles. Its tail is gradually disappearing as it approaches the orbit of Mars due to the weakened effect of solar radiation. Calculated average velocity 82,800 mph. (Data according to Stellarium)

 

Apertura 72mm refractor / Orion G10 camera / EQ6R mount

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[emflocater]

Great pics especially knowing that the comet is around magnitude 8.7. Glad I was able to view and photograph the comet in mid to late October 2024!

 

Cheers

Don

 

Click pic for larger better pic.

 

Edited by emflocater, 23 November 2024 - 02:21 PM.

[Sky King]

From last night, Comet C/2023 A3 hurtles along in the same frame as Alya, the double star in Serpens.  50 images at 30 seconds each.

 

8 EdgeHD, .7 reducer, ASI533MC Pro, UV/IR filter. 

 

 

 

 

 

 

 

 

Edited by Sky King, 23 November 2024 - 04:41 PM.

[Erik Bakker]

Wonderful image of the comet and that beautiful double star, it give a great impression and “feel” how the comet looks visually nowadays at low magnifications. 

 

A few days ago skies cleared for the first time in 3 weeks and I had another look at the comet. Boy had it shrunk and dimmed a lot! I could see the comet with difficulty next to a star drawing attention away from the comet’s presence. 2 days later you caught it in your image with a beautiful double to boot, unfortunately my skies had already turned cloudy again, so I missed that opportunity. But your image is a great souvenir of this close encounter, thanks! 

[emh52]

A "cloudy night" tonight- so catch up on last night , this 370 sec integration of photos captured with a Vixen VSD astrograph and a Nikon Z8 camera

That double star as mentioned above is a nice feature.

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[markalot63]

I was only able to get 8 decent frames before clouds moved in, and had to throw away 3 of these due to tracking errors.

 

First light of an Askar 71F at 490mm focal length, 5 - 60 second subs.

 

[markalot63]

Another night that got cloudy as soon as I started imaging.  New scope curse for sure.  Any background fuzz is not real as I had to remove a lot of the star haze due to clouds.  Did not touch any area near or in the tail of the comet.  Friday night is supposed to be properly clear AND get down to 18F  Brrrrrr.  

 

[emh52]

At the edge of a star-rich section of the Milk Way on November 27 2024    

 

The comet is still looking nice

 

https://flic.kr/p/2qwMYj7

 

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[Dave Mitsky]

This is the first Seestar S50 image of the comet that I've captured for some time.  The conditions at my red zone home were far from ideal earlier tonight, and this was the best that I could manage.

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[markalot63]

The clouds cooperated, cloudy before sunset and after this went behind the trees.  Amazing luck.  I can get 50 minutes with the scope jammed in the front corner of the garage.   

 

[Sky King]

12-1-24     C2023 A3 Tsuchinshan ATLAS including NGC 6756    33 useable images at 30 second each 

 

8 EdgeHD, Celestron .7 reducer, UV/IR Filter, ASI533MC Pro, Siril and Affinity Photo. 

 

Just in time to catch Comet C/2023 A3 as it hurtles along in the same frame as NGC 6756.

 

 

 

 

 

 

 

[Cosmo Geezer]

From the Mollie Brown Observatory 12/01/24 . . . Comet C/2023 A3. Distance from Earth 184,708,179 miles. Distance from Sun 138,460,143 miles. Calculated average velocity 77,220 mph. The comet is positioned in front of a dusty lane and a multitude of stars in the Milky Way. The tail is definitely fading as it travels farther away from the Sun. (Data according to Stellarium)

Apertura 72mm refractor / Orion G10 camera / EQ6R mount

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[kannassee]

Tsuchinshan ATLAS about a week ago.....

 

Well there is no doubt that this has been the most widely photographed comet in the history of mankind!!!....

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Edited by kannassee, 06 December 2024 - 01:47 PM.

[markalot63]

Another early mostly cloudless evening.  FRA300 this time (300mm focal length, 2600MC Duo camera). The moon did not help.

 

Edited by markalot63, 07 December 2024 - 10:01 PM.