M20, M13, NGC 7822 Comet C/2025 A6 (Lemmon)

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M20 (Trifid nebula): Captured at Fairwood on the night of the 21st September 2025 during a members observing and imaging evening with an Altair 60EDF doublet refractor fitted with a 0.8 x FR using an ASI 533MM Pro camera - 50 minutes of 5 minute subs of SHO data with wide field and cropped edits done in Pixinsight.

M13 (Great Hercules Globular Cluster): 30 mins of 5 minute subs of RGB data taken at Fairwood on the night of the 21st September 2025 during a members observing and imaging evening with an Altair 60EDF doublet refractor fitted with a 0.8 x FR using an ASI 533MM Pro camera. Data integrated in DSS and further processed in Pixinsight and Adobe Lightroom/Photoshop.

NGC 7822 (Question Mark nebula): Taken over the two nights of the 21st/22md September 2025 with an ASI 533MM pro camera and EFW using both RGB and SHO filters. The RGB data comprises just one hour and the starless SHO image a further 7.5 hours. 

Comet C/2025 A6 (Lemmon): First images I have managed of this comet that was discovered back in January 2025 on a 1,350 year inbound trajectory towards the Sun. The comet appears to have been in outburst recently as it makes its way towards the Sun and was reported as brightening from magnitude 15 to magnitude 7 in recent days. On the morning of the 22nd September at around 05:15 I took 4 x 1 minute subs of RGB data with my ASI 533MM Pro camera and Altair 60EDF doublet refractor fitted with a 0.8 x FR totalling 12 minutes and at the same time on the 23rd September 3 x 2 minute subs totalling 18 minutes using the same equipment. Data were stacked in DSS and processed in Pixinsight using similar techniques for each days data and compiled as colour images to show the green nucleus and faint tail. To compare the comets change in brightness I compiled all mono data as one in DSS and again processed each day's data in a similar way for a side by side view. The comet appears to have dimmed slightly on the 23rd, however this may be the result of the different exposures used and changing sky conditions, so further monitoring is needed. It will be interesting to see how bright the comet gets when it makes its closest approach on October 21st this year.

Chris Bowden