My 1st serious Jupiter for the 2008 season!

[Dennis]

Hello,

Well, after a somewhat slow start, here is my 1st serious Jupiter for the 2008 season! The jet stream map looked full of promise although the surface winds were quite strong, knocking Jupiter off the DBK chip on 2 out of every 3 AVI’s, so it was more like a war of attrition than a relaxed imaging session.

I decided to go for broke and cracked open the seals on the C9.25 and TeleVue x4 PowerMate and almost got away with it. The final image is a little soft as the pesky surface wind gusts took the edge of what looked like some quite steady jet stream conditions.

This is from probably the best AVI of the session. Brisbane, 22nd Sept 2008, 19:23pm AEST (GMT+10).

Celestron C9.25 F10 SCT.
TeleVue x4 PowerMate (2”).
DBK21AF04.AS CCD camera.
Gain=850
Exposure=1/15 sec.
Frame rate=15fps
Gamma=10 (hard left slider)

Cheers

Dennis

[iceman]

Some reasonable detail there, Dennis. I can't believe that's your first serious Jupiter! A late bloomer, huh?

It sure has been a poor season up there. I remember fondly your work in 2006 *sigh*

[peter_4059]

Dennis,

Despite the conditions, it still has a lot of detail. Why did you use the low frame rate with the DBK?

Peter

[Dennis]

Thanks Mike,

Yeah, earlier attempts came to naught with the poor season up in SE Qld, although Matt’s persistence has produced some good results, dwelling in his magical seeing cell over Wynnum!:whistle:;)




Thanks Peter,

I’d had the DMK31 plugged in earlier (for some testing) and after hot swapping the DBK21, I overlooked changing some of the settings. A bit rusty at the moment!:whistle:

Cheers

Dennis

[Lester]

Nice image Dennis. I am interested to see what the new DBK type cameras can perform like on Jupiter.

[cookie8]

Nice capture Dennis. Lots of detail and pleasing colour.:thumbsup: I hate poor seeing:mad2:

[Dennis]

Thanks Lester and Vincent.

In terms of perceived image quality on the Notebook display at the time of capture, the most obvious difference between my Mono DMK21 and Colour DBK21 is the noticeable increase in noise of the DBK, as the Gain needs to be pumped up to 950 in order to bring the histogram up towards the 230 mark. With the DMK I can hover around the 800 to 850 mark and the image doesn’t look noisy at all.

You also need to display the live RGB Histogram at capture, to make sure you are not clipping in the Blue Channel, which seems to saturate first when I record Jupiter.

Cheers

Dennis

[matt]

Nice one Dennis. Better late than never, heh?

Yep. It has been a fairly horrible season up here. Fingers crossed for better in the near future:)

That's a good result given the conditions which I also braved last night:screwy: Like you, I was suckered in by a promising jetstream map.

Your image is quite similar to what I've just posted.

[Dennis]

Thanks Matt – I’ll browse the Forum for yours; I think the bay side area was forecast to have stronger gusts, so did you get blown around a little?

Cheers

Dennis

[RB]

Very nice Dennis.
I'm so rusty at planetary work I may as well be scrapped. :lol:

Great to see you got your 1st Joop for 2008, like Mike said I remember your 2006 work too with fond memories.

[AlexN]

Great looking jupiter Dennis, I just read Matt's thread about the wind, and as I mentioned in that thread, up in the northern suburbs the wind was really a soft breeze.. just enough to keep the dew at bay.