Observation by Chris Hooker: Io sodium cloud, 24 Feb 2024

Uploaded by

Chris Hooker

Observer

Chris Hooker

Observed

2024 Feb 24 - 20:20

Uploaded

2024 Feb 24 - 23:24

Objects

Jupiter

Equipment

110 mm F/6 ED refractor
2.2x re-imaging focal reducer
Alluxa sodium D-line filter, Thorlabs 570 nm filter
ZWO ASI178MM camera

Exposure

90 sec sodium; 18 seconds off-band

Location

Didcot, Oxfordshire

Target name

Jupiter

Title

Io sodium cloud, 24 Feb 2024

About this image

The first chance for a month to image Io's sodium cloud. Io had just completed a transit and was emerging from the glare on the western side of Jupiter. Exposures of 90 seconds for sodium and 18 seconds with the 570 nm off-band filter gave similar brightness in the scattered glare around Jupiter, which made the subtraction of the off-band image easier. The visible sodium stream extends for around 10 Jovian radii, and shows some interesting structure with two brighter components that initially diverge then appear to rejoin. There is a suggestion of a faint streak to the north of the main feature. The Galilean moons are identified by their initial letters. North is up.

Files associated with this observation

Io sodium 24 Feb 24.png (512.6 kB)

Like this image

Steve Knight, Paul G. Abel, Jeremy Shears, Callum Potter, Graham Winstanley, Bill Leatherbarrow, Mike Foulkes, Philip Jennings

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