Observation by Chris Hooker: Mercury, 10th July 2022

Uploaded by

Chris Hooker

Observer

Chris Hooker

Observed

2022 Jul 10 - 06:05

Uploaded

2022 Jul 11 - 09:42

Objects

Mercury

Equipment

254 mm F/6.3 Newtonian
%x IR Barlow
Baader 685 nm long-pass and Thorlabs 850 nm short-pass filters
ZWO ASI174 mono camera

Exposure

0.33 ms @ F/32

Location

Didcot, Oxfordshire

Target name

Mercury

Title

Mercury, 10th July 2022

About this image

At the time of this observation Mercury was at 94.5% illumination and just under 8 degrees from the Sun. The observation was made in the morning before the Sun rose over a nearby roof and sunlight hit the telescope primary mirror. The seeing was average at Ant III. The verification images are sharpened stacks from the odd- and even-numbered videos, whereas the main image was made using manually-selected frames from the best data following pre-selection in PIPP and Registax. Normal and blurred WinJupos images are shown for comparison.

Files associated with this observation

Mercury 10 Jul 22.png (66.4 kB)

Like this image

Steve Knight, Philip Masding

Comments

Steve Knight, 2022 Jul 11 - 11:38 UTC

Astonishing image. I make 5.25 arc sec the apparent size of a penny at 800m distance!

Chris Hooker

Chris Hooker, 2022 Jul 11 - 11:49 UTC

Thanks, Steve.

To be exact it's 785.8 metres, but Mercury's angular size is probably not that accurate anyway!

Chris

Steve Knight, 2022 Jul 11 - 14:14 UTC

Well I made it 797.56m on my helical slide rule. Maybe I used size of a dime instead of a penny? I used 20.3mm. I posted it (with full credit) on UK Astronomy Facebook group (>20k members). Told them to join BAA (then like it) :) Steve

Chris Hooker

Martin Lewis, 2022 Jul 12 - 10:43 UTC

Great image Chris - hoped you would get an image in to show me what it was like.

No Sunday morning lie in for you then!

Best

Martin

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