Observation by Martin Lewis: Ganymede and Io 11th October 2022

Uploaded by

Martin Lewis

Observer

Martin Lewis

Observed

2022 Oct 11 - 20:54

Uploaded

2022 Oct 14 - 18:17

Objects

Jupiter

Equipment

444mm Dobsonian
ASI482MC + L for Io
ASI224MC + L for Ganymede

Location

St Albans, UK

Target name

Ganymede and Io

Title

Ganymede and Io 11th October 2022

About this image

Ganymede & Io images compared with Winjupos simulations. LH images both taken in the good seeing on 11th October from St.Albans UK. Ganymede only 1.8" across & Io just 1.3" across

Martin

Files associated with this observation

Ganymede_Io_2022-10-11_L_MLe.png (168.7 kB)

Like this image

Mattia Piccoli, Jeremy Shears, Dean Norris, Dr Paul Leyland, Paul G. Abel, Mike Foulkes, Alexander Vandenbohede, Mike Greenhill-Hooper, Gerard Cauchi, Philip Masding, Manolo_Rodriguez, Ron Johnson, David Basey, Bill Leatherbarrow, Simon Kidd, Martina McGovern, Peter Mulligan, Chris Hooker, Philip Jennings

Comments

Dr Paul Leyland, 2022 Oct 15 - 09:16 UTC

Minor problem --- the image should be tagged "Jupiter", not Aspidiske.

Unless you wish to join my campaign for solar system satellites to be added to the tag list ...

Martin Lewis, 2022 Oct 15 - 14:26 UTC

Amended. Should default to something meaningless when you put an unacceptable value in rather than the first item on the true list.

Dr Paul Leyland, 2022 Oct 15 - 16:25 UTC

Should be a photo of the week, IMO.

Martin's telescope has an Airy disk of 0.3 arcseconds. He seems to have managed to deconvolve to a scale smaller than that. To see this, consider that Ganymede is only six disks across and Io 4.5 disks. The detail on Ganymede looks a bit better than 1/6 of its diameter to me.

Manolo_Rodriguez

Philip Masding, 2022 Oct 15 - 16:41 UTC

Incredible !

Dr Paul Leyland, 2022 Oct 15 - 19:15 UTC

Martin: in my view it should default to an error condition. Failing that, to no tag at all. Agree it should not default to a valid but incorrect value.

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