Comet C/2023 A3 (Tsuchinshan -Atlas)

Photos by Th.Boeckel

 

Discovery and appearence dates

On January 2023, the brightest comet since Neowise C/2020 F3 was discovered by the Chinese observatory which is situated in the Tsuchishan Mountains (Purple Mountains). Initially, the comet was classified as an asteroid with ~*mag 23, In April 2023 the comet could also belated confirmed by the PanSTARRS observatory in Hawai'i as part of the ATLAS (Asteroid Terrestical-impact Last Alert System) program.

When I received the report of the comet I jokingly thought, 500 times to sleep and the show begins ;-). After 500 sleep units the comet reached the sun near orbit and could be observed with the naked eye from Earth. The comet reached the brightness of (-3) - (-4) *mag during the solar passage from October 8th to 10th and was lined up in the top three brightest comets of the last 100 years. Allegedly day images before sunset were taken from the comet but I haven't seen any convincing results until now. Tsuchi was positioned in the perihelion (closest point to the sun) on October 3rd. The closest distance to Earth was at October 12th with 0.47 AU, which corresponds to 71 million kilometers.

Observations: Several attempts in South Germany to see the comet during its approach on September 26/27/28/September failed miserably because I was confronted with low-lying cloud banks that appeared suddenly during the observations. During the further observations from the 12th October onwards mostly suboptimal weather conditions like  fog banks, haze and the waxing moon / full moon disturbed intensively.


First sighting: October 13, 2024

Amiata volcano and the comet

Escaping from the bad weather in Germany and mostly Northern Europe the first sucessful sighting occurred on the 13th in Tuscany near the Monte Amiata volcano 25 km north of Orvieto (Italy). I also have to addmit that finding this location was purely coincidental as I had to escape again from a cloud barrier situated south of Siena. And it is not easy to get a free sight in the forests regions of Tuscany. By energetic driving and searching I reached this brilliant place in the last minutes!! However, this 'last minute' sighting was extremely impressive and you have to see this celestial event by yourself to admire a 1.3 *mag bright light pillar near the horizon.

Comet C/2023 A3  ( Tsuchinshan - Atlas ) by Boeckel   Comet C/2023 A3  ( Tsuchinshan - Atlas ) by Boeckel

19.15: First sight of Tsuchinshan-Atlas in the early dusk. In the foreground the volcano Amiata :-).

Comet C/2023 A3  ( Tsuchinshan - Atlas ) by Boeckel   Comet C/2023 A3  ( Tsuchinshan - Atlas ) by Boeckel

Canon 70mm, f2.8, 4sec, ISO 1600, Sony a7III,

19:30 (CEST): The comet presented its poweful shiny appearence beside the volcano shilouette. ~1.3 (mag)*.

Comet C/2023 A3  ( Tsuchinshan - Atlas ) by Boeckel

Sony 35 mm, f4, 8sec, ISO 1600, Sony a63,

Comet C/2023 A3  ( Tsuchinshan - Atlas ) by Boeckel   Comet C/2023 A3  ( Tsuchinshan - Atlas ) by Boeckel

Canon 70mm, f2.8, 6sec, ISO 1600, Sony a7III,

19.45:What an an amazing celestrial performance and in addition it is really seldom to see a comet in the dusk with naked eyes.

Comet C/2023 A3  ( Tsuchinshan - Atlas ) by Boeckel   Comet C/2023 A3  ( Tsuchinshan - Atlas ) by Boeckel

The comet taken with a 200mm telelens.


October 15, 2024

 Lago Campotosto near L'Aquila, Italy

Comet C/2023 A3 ( Tsuchinshan - Atlas ) by Boeckel    Comet C/2023 A3 ( Tsuchinshan - Atlas ) by Boeckel

Despite the 3/4 moon you can see the comet easily with naked eyes ~2.0 (mag)*

Comet C/2023 A3  ( Tsuchinshan - Atlas ) by Boeckel

If you look at the coma you can see weak the weak Anti-Tail in front of the comet

Komet C/2023 A3 ( Tsuchinshan - Atlas ) by Böckel

Waiting for the sunset...


October 17, 2024

 Trostberg, South Bavaria

Comet C/2023 A3  ( Tsuchinshan - Atlas ) by Boeckel    Comet C/2023 A3  ( Tsuchinshan - Atlas ) by Boeckel

Despite the full moon you can still see the comet easily with naked eyes.~2.6 (mag)*

The top photo shows the comet with slight anti-tail.

Comet C/2023 A3  ( Tsuchinshan - Atlas ) by Boeckel


October 21, 2024

 Maisach, South Bavaria

The comet becomes now a nice telescope object ~ 4.0 (mag)*

Comet C/2023 A3  ( Tsuchinshan - Atlas ) by Boeckel   Comet C/2023 A3  ( Tsuchinshan - Atlas ) by Boeckel   Comet C/2023 A3  ( Tsuchinshan - Atlas ) by Boeckel

Left: Newton 900mm; f4,5; 12sec; Iso 3200; 1,5 x crop          Middle, right; 41mm; f 3.2 ; 11,3 sec; Canon 5d


October 28, 2024

 Grafrath, South Bavaria ~5,4 (mag)*

Comet C/2023 A3  ( Tsuchinshan - Atlas ) by Boeckel   Comet C/2023 A3  ( Tsuchinshan - Atlas ) by Boeckel

Canon 28mm,f 2.8 ; 16sec; Iso1600, Sony a73

Comet C/2023 A3  ( Tsuchinshan - Atlas ) by Boeckel   Comet C/2023 A3  ( Tsuchinshan - Atlas ) by Boeckel

Nikon 300m, f 2.8 ; 20 sec; Iso1600 crop1,5 Sony a73


Last Update November 01, 2024

 Germerswang, South Bavaria 5,7 (mag)*

Comet C/2023 A3  ( Tsuchinshan - Atlas ) by Boeckel

Newton 900mm; f4,5; 12sec; Iso 3200; 1,5 x crop

Servus and Ciao :-)


*mag  = > light magnitude: Up to mag +3 or +4 stars are visible nearby cities with the naked eye, in very dark areas the seeing limit can reach up to mag +6.

The more higher numerical value is given, the more weaker are the objects. E.g. - 4,7 mag, Venus glittering; - 1,0 Sirius, brightest star; + 3,5 M31 Andromeda, pale shiny oval)


All comet observations from 2001 up to now ..


   

  

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©2024, Thorsten Boeckel, last modification 22.Oct.2024

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