Talk:C/2024 G3 (ATLAS)

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	This article was accepted from this draft on 11 November 2024 by reviewer Qcne (talk · contribs).

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Comet C/2024 G3 (ATLAS) and it apparent magnitude forecast

The latest version of the wiki page (after editing by @SpaceNerd13) has errors related to brightness prediction.

Forward Scattering with maximum phase angle 116° will not have much effect on peak mag. (<0.8m) 2. With extrapolation of current magnitude rate to perihelion (H0=5; 2.5n=17) we get the peak apparent magnitude -13m. Closer to perihelion there may not be any deceleration to n=~3.5. Also, i don't understand reason for remove my phrase " But this comet at the moment have 2.5n=17!" Proof of new/old status based on brightness dynamics without that phrase makes no sense. I'm writing here to avoid a "war of edits".

Txzba (talk) 18:11, 15 November 2024 (UTC)[reply]

I wouldn't consider the automatic solution of COBS to be worth of including in the article. It is known to have failed spectacularly before. COBS is only worth for its news pieces and observation logs. There seems to be some WP:OR in the article. C messier (talk) 18:26, 15 November 2024 (UTC)[reply]

I obtained most of the information through my own calculations. Now I understand that this is not approved here. Sorry. Txzba (talk) 18:34, 15 November 2024 (UTC)[reply]

I see..... well your phrase " but the comet at the moment have 2.5n=17!" kinda sounds like its for a news report or an essay. You can put those........ numbers and calculations back but just a tip dont make it sound like an essay or something. Im sorry for removing you parts. SpaceNerd13 (talk) 18:52, 15 November 2024 (UTC)[reply]

Third brightest comet in 20 years

That statement needs a reliable source that mentions it exactly as it, not going to COBS, finding two comets that were brighter and then assuming that this would be third brightest, because this is WP:OR. C/2011 W3 (Lovejoy) and C/2012 S1 (ISON) peaked at brighter than -2.1, maybe some SOHO sungrazers too. C messier (talk) 06:27, 17 November 2024 (UTC)[reply]

Gideon van Buitenen assumes deceleration to n=3.6, however, the comet does not necessarily behave this way. This is "old" comet (this is also mentioned here - https://www.cloudynights.com/topic/942975-alpo-comet-news-for-november-2024 "Usually, with such a small perihelion distance, we are concerned with the possibility of disintegration. While that is always a possibility, this comet appears to be dynamically old so it has likely made past close perihelia passages in the past."). By this reason it doesn't have obvious pattern, and it is very difficult to predict peak mag. Txzba (talk) 19:00, 17 November 2024 (UTC)[reply]

Gallery

@Bruno de Paula Garcia: Wikipedia galleries aren't supposed to be image repositories, that is the role of the Commons. It is a bright comet and as such easy to photograph. In Commons now there are dozens of images of the comet. I guess you agree that they can't be all included.

The images from ISS offer a unique perspective but having two versions of the same image isn't adding meaningfully to the article. A perihelion image of the comet from north hemisphere would be usefull but those chosen aren't the best available (comet appears to small). Also smartphone images may be special for their photographers but there are better images available in Commons. C messier (talk) 20:29, 22 January 2025 (UTC)[reply]

The image I posted has, in addition to the comet, Saturn and Venus together, providing a unique perspective. Look at the right side of the photo. Bruno de Paula Garcia (talk) 20:40, 22 January 2025 (UTC)[reply]

Venus and Saturn along the comet also appear at the image from Cerro Paranal that is right before it, with Venus shining over the telescope building and Saturn next to it. C messier (talk) 21:16, 22 January 2025 (UTC)[reply]