Category: Comet

Another fantastic image of Comet 12P/Pons-Brooks captured on the 27th March 2024 by Jim Burchell using his Seestar S50 smart scope.  The image consists of 24 x 10 second images stacked.

For more information about the comet 12P Pons-Brooks check out https://ras.ac.uk/news-and-press/news/12ppons-brooks-how-and-when-see-devil-comet

Two fantastic images of Comet 12P/Pons-Brooks taken on the 15th & 18th March 2024 by member Jim Burchell. The images were taken using a Seestar S50 smartscope.  On both nights Jim had a very small amount of time to capture the comet due to clouds rolling in. The image taken on the 15th is a stack of 6x10 second images and the image on the 18th is a stack of 18x10 second images. 

Comet 12P/Pons Brooks on 15th March 2024

Comet P12/Pons Brooks on 18th March 2024

For more information about the comet and how to locate it check out https://www.skyatnightmagazine.com/advice/comet-12p-pons-brooks

Superb image of Comet Lemmon C/2023 H2 taken by member Richard Bohner on the 11th Nov 2023 from Arizona, USA. Richard used the following to acquire his image - Canon 5D Mk IV on a Celestron 8” SCT. Magnification about 100X. 60 seconds exp. At ISO 10K.

The comet was discovered on April 23, 2023 with a robotic 1.5m reflector telescope of the Mount Lemmon Survey, hence the name Comet Lemmon (C/2023 H2). That program is part of the Catalina Sky Survey based at Stewart Observatory's Catalina Station near Tucson, Arizona, which combs the sky each night in search of new comets and asteroids. The comet is just one of an incredible 50,000 asteroids and comets discovered by the Mount Lemmon Survey, making it one of the most prolific minor planet-discovering surveys currently operating.

During mid-November the comet was moving across the western sky from the constellation Hercules through Aquila just below the Summer Triangle asterism.

C/2023 P1 (Nishimura) is a long-period comet discovered by Hideo Nishimura on 12 August 2023 and member Martin Crow imaged it on the 20th August 2023.  At the time of its discovery, the comet was in the constellation of Gemini and shining at magnitude +10.4.

Image details: 5x60sec exposures. 235mm diameter SCT @ f5.4, SX694 mono CCD.

A rather splendid image of Comet C/2023 E1 (ATLAS) taken by CMHASD trustee and secretary Dr. Mike Rushton on the 12/13th July 2023 in Ursa Minor. 

Mike wrote ''This is C/2023 E1 (ATLAS) last night.  Approx Mag 14.5 with a greenish coma. The bright star in the image is Mag 7 and the limiting Mag 17.5.  Perihelion was 1/7/23 and closest to earth will be on 18/8/23. This was a 20 min exposure with my eVscope.'' Imaging started just before midnight on 12/7/23 (23:57 BST).

Comet C/2023 E1 (ATLAS) was spotted on the 1st March 2023 by the NASA funded Asteroid Terrestrial-impact Last Alert System (ATLAS). At the time, the comet was a +19th magnitude object moving through the constellation of Virgo.  

On July 1 this Comet ATLAS reached perihelion, its closest approach to the Sun.

To date the comet has now moved into Draco and will move into Cepheus towards its closest approach to Earth mid-August.  On August 18 this visitor to the inner Solar System will only be 3 light-minutes or so from our planet.

Based on its inclination to the ecliptic plane (38 degree) and orbital period of about 85 years C/2023 E1 (ATLAS) is considered a Halley-type comet.  Though the comet currently has a 'C' designation for a long period comet versus periodic comet; that will probably change as 85 years is much less than the 200 year orbital period cut off defining the 2 categories of comet.

Below is the report from SETI/UNISTELLAR Mike received back after submitting his imaging data.

Mike said ''I have had the photometry back and it was brighter than I thought at Mag 12.8. See the report from seti below. The little image in that report is stacked on the moving comet. The original image I sent was stacked on the stars.''

For more information: https://www.space.com/comet-c2023-e1-atlas-little-dipper-how-to-see