Jupiter Sept 22nd in reasonable seeing

[Quark (Trevor)]

Hi all,

Imaged Jup last night in reasonable seeing, was variable early on but steadied by midnight.

It was quite windy and but for the protection of my dome I doubt I would have been able to keep Jupiter on my chip.

Have attached an RGB and 807nm IR image.
This was my 6th straight night of being able to capture Jupiter data and tonight is looking good also. I note that the jetstream predictions look like bringing my run to an abrupt end as it looks like it will swing back to the south iminently.

Thanks for looking.
Regards
Trevor

[lcd1080 (Peter)]

Originally Posted by Quark

It was quite windy and but for the protection of my dome I doubt I would have been able to keep Jupiter on my chip. Trevor

Hey Trevor, I was wondering if you ever have trouble keeping Jupiter on your chip because of the periodic error of your mount. The field of view on my chip becomes less than 4 arcminutes when I'm imaging at F/30. Jupiter itself is almost 1 arcminute so with my imperfectly driven alt-az mount Jupiter often drifts off my chip. At that moment I have to cut my AVI file short because Registax can't handle the abrupt change that would result if I tried to splice two disjointed AVI segments together.

Peter

[Quark (Trevor)]

Hi Peter, my drive is very good and requires minimal input from my drive corrector to keep Jup on the chip.

Windage on my tube, which is about 19" O.D. and close to 6 ft long is another matter. Without the protection offered by my dome there would be many nights where it would be impossible to keep Jup on the chip.

At the moment if I centre Jup on my 640x480 pixel frame I have a gap to the top and bottom of the frame of approx 32 pixels, not much to play with.