Jupiter, Ganymede, Io-Canberra - 1145UT

[matt]

Seeing was pretty ordinary last night. At best a 4 out of 10:sadeyes:

On the laptop screen the detail was getting a hammering from the JS.

The usual - 9.25, 3x barlow, ToUcam Pro II.

Cheers

[davidpretorius]

nice work on the moonage matt, not sure if anyone got the shadow though

top stuff

[matt]

Thanks, Dave.

I really thought about staying out there to capture the shadow/s but it was so cold and the seeing so bad...I just jumped at the chance of some shut eye.

Wussed it!:lol:

[iceman]

Still a very nice image for the conditions. The colours are great, scale is nice.

Well worth capturing and posting, not everyday you get double-moonage.

[gbeal]

I'd be happy with that Matt. This year I have had about 4 - 5 cracks at Jupiter, and none have even come close the "smoothness" you have here. Such is life in this island paradise.

[bird]

Hi Matt, nice image there. btw there was no jetstream last night, the seeing was very still and good out this way.

How are you cooling your scope? I imagine it must be a bit tricky to get a SCT to ambient at this time of year.

regards, Bird

[matt]

Hi Anthony.

What a difference 50Ks can make, eh?

We've discussed and marveled at that on numerous occasions, haven't we mate;)

Sure looked like JS on the lappy. Musta been some other localised effect:shrug:

As far as cooling goes, I'm just working with the standard Lymax cooler and leaving the scope outside for a few hours before imaging to let it stabilise.

But yes, it's always a challenge during winter to 'chase' ambient and I will struggle without active cooling.

Would certainly have contributed to the loss of detail.

Ah well. It's all good fun anyway.

Cheers

[Dennis]

Hey Matt

That is an excellent image. Smooth appearance, gorgeous colours and rich in detail. Are you sure it was 3 to 4/10? I'd be stoked to produce such a fine image at 5 to 6/10.

I know it’s all relative and somewhat subjective, but 3 to 4/10 on my scale would result in just blurry bands – like this miserable effort from the previous double transit that compelled me to change to prime focus.

Cheers

Dennis

[matt]

Hmmm.

You might be right, Dennis.

It may have been a 5-6/10.

I think Bird has hit the nail on the head.

I was imaging between 9 and 10pm. So being an SCT, with no active cooling, I would have still been wrestling with mirror temp and air inside the tube.

Will definitely be a challenge to image this time of year in Canberra with an SCT.