Observation by Chris Hooker: Mercury in IR, 20th July 2021

Uploaded by

Chris Hooker

Observer

Chris Hooker

Observed

2021 Jul 20 - 06:40

Uploaded

2021 Jul 21 - 18:48

Objects

Mercury

Equipment

254 mm Newtonian
5x IR Barlow lens
610 nm long-pass and 850 nm short-pass filters
ZWO ASI174MM mono camera

Exposure

0.3 msec @ F/31

Location

Didcot, Oxfordshire

Target name

Mercury

Title

Mercury in IR, 20th July 2021

About this image

An early session to capture Mercury in good seeing, curtailed by cloud (and the need to leave for work!). For this image I used a wider spectral region (between 610 nm and 850 nm) than for the previous sessions, in order to have more signal and use shorter exposures (300 microseconds instead of 500). Only eight video sequences were recorded before the cloud intervened; with more data I believe the image quality would be better. However, this data was good enough to process and stack entirely in software, without the need for manual frame selection.

Files associated with this observation

Mercury 20 July 2021.png (224.6 kB)

Like this image

Martin Lewis, Chris Dole, David Basey, Manolo_Rodriguez, Graham Winstanley, Steve Knight

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