Observation by Martin Lewis: Mars in IR with 642nm filter versus in f...

Uploaded by

Martin Lewis

Observer

Martin Lewis

Observed

2019 Apr 10 - 18:32

Uploaded

2019 Apr 11 - 21:02

Objects

Mars

Equipment

444mm Dobsonian
ASI290MM
642nm filter IR

Location

St Albans

Target name

Mars

Title

Mars in IR with 642nm filter versus in focus Aldeberan

About this image

Here is a comparison at the same image scale of Mars and nearby Aldebaran with my 444mm scope using an Astronomiks 642nm filter for both. Interesting to compare the size of the details on the surface with the size of the Airy disc of the star.

Mars was 4.5" across and Airy disc (dia of first dark ring) should be about 0.8" and Dawes limit about 0.33".

Martin

Files associated with this observation

Mars v Aldeberan on_2019-04-10_642nm.png (591.4 kB)

Like this image

Chris Dole, Martina McGovern, David Basey, Miguel Araújo, Jeremy Shears, Andy Wilson, Grant Privett, Graham Winstanley, Peter Carson, Ron Johnson, Andrew Dumbleton

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