Jupiter Sept 17th

[Quark (Trevor)]

Hi All,

Imaged Jupiter in reasonable seeing, other than for a bit of hi alt Cirrus.

Have attached 5 RGB's & 3 807nm IR images.

Thanks for looking
Regards
Trevor

[asimov (John)]

Thanks for the views mate. It's been clouded out since my last capture here - Might need a respray if I keep polishing the car...Lol.

[Quark (Trevor)]

Originally Posted by asimov

Thanks for the views mate. It's been clouded out since my last capture here - Might need a respray if I keep polishing the car...Lol.

Reckon you must have the shiniest car in Queensland John.
Just finished processing last nights data, tonight is looking good as does the next 4 or 5 nights.

Time to wander back down to my observatory now.

Cheers
Trevor

[John Hothersall]

Some very nice images and great IR detail, just wish I could get out but cloudy for a week in Bris.

John.

[lcd1080 (Peter)]

Very impressive Trevor; it looks like Red Jr. has "decoupled" from the GRS.

What do the designations CM I 154.1 CM II 162.1 mean? Often I see planetary photographers use a third designation called "CM III". What additional meaning does that convey?

Thanks,
Peter

[Lester]

Very nice images again Trevor, all the best for the next days of good seeing. Only cloud down my way for ages.

[Paul Haese]

Nice Trevor, we have been clouded out while you just have that extra distance from the coast to escape the cloud. I am hoping for some clear sky tonight or tomorrow night. Jet stream predictions looks good while this high pressure is slowly moving towards us. Just need the southerly air stream to dry up a bit and the cloud to disperse and we are in I think.

[Quark (Trevor)]

Originally Posted by John Hothersall

Some very nice images and great IR detail, just wish I could get out but cloudy for a week in Bris.

John.

Thanks John, with my aperture the 807nm IR works quite nicely and doesnt seem to be effected so much by the light hi alt Cirrus that has certainly taken the edge off of my RGB images, hope it clears up for you iminently.

Originally Posted by lcd1080

Very impressive Trevor; it looks like Red Jr. has "decoupled" from the GRS.

What do the designations CM I 154.1 CM II 162.1 mean? Often I see planetary photographers use a third designation called "CM III". What additional meaning does that convey?

Thanks,
Peter

Thanks Peter, the coordinate systems for Jup & Saturn have to allow for the differential rotation that is experienced by Gas Giants. This differential rotation effects Longitude, thus we have two systems for Longitude, CMI & CMII.

CMI coordinates are for the Equatorial region, +10 to -10 degrees Lat.
CMII coordinates are for all other latitudes not covered by CMI.
CMIII coordinates relate to the internal rate of rotation. EG: such as with the radio sources that emanate from lightning deeper within the atmosphere.

The data that I supply to the Cassini RPWS team is always specified in CMIII. Even though the white spots that I image (which are the tops of the clouds associated with these electrical storms) are at the surface, they are directly related to lightning deep within the atmosphere which is detected by the Cassini RPWS instrument in the form of radio data.

Hope this helps.

Originally Posted by Lester

Very nice images again Trevor, all the best for the next days of good seeing. Only cloud down my way for ages.

Thanks Lester, hope the cloud clears for you while Jup's aparent dia remains around 50 arc sec's.

Originally Posted by Paul Haese

Nice Trevor, we have been clouded out while you just have that extra distance from the coast to escape the cloud. I am hoping for some clear sky tonight or tomorrow night. Jet stream predictions looks good while this high pressure is slowly moving towards us. Just need the southerly air stream to dry up a bit and the cloud to disperse and we are in I think.

Thanks Paul, the jet charts look really good right throught to the end of the week but as you have mentioned earlier, we need the cloud to clear to take advantage of it.

For this particular session the seeing looked like it would be good but each time the live feed started to deliver really nice crisp detail the cloud got thicker and killed the signal. All of my RGB's suffered to some extent but my 807nm IR filter seems much less effected.

Hope it clears up for you through the week, it would be a shame to have the best jet outlook for the year and coinciding with opposition, ruined by cloud.

[Hypnotist (Bartholomew)]

Hey Trevor,

Great images of Jupiter! Do you think I could do the same thing with my new Celestron CGE 1400 Pro EdgeHD?

Clear skies and thanks

Bart

[lcd1080 (Peter)]

Thanks Trevor, that helps a lot; previoulsy I googled CMI, CMII, and Jupiter and although I saw some references to them I didn't come up with a good description like yours.

Peter

Originally Posted by Quark

Thanks Peter, the coordinate systems for Jup & Saturn have to allow for the differential rotation that is experienced by Gas Giants. This differential rotation effects Longitude, thus we have two systems for Longitude, CMI & CMII.

CMI coordinates are for the Equatorial region, +10 to -10 degrees Lat.
CMII coordinates are for all other latitudes not covered by CMI.
CMIII coordinates relate to the internal rate of rotation. EG: such as with the radio sources that emanate from lightning deeper within the atmosphere.

The data that I supply to the Cassini RPWS team is always specified in CMIII. Even though the white spots that I image (which are the tops of the clouds associated with these electrical storms) are at the surface, they are directly related to lightning deep within the atmosphere which is detected by the Cassini RPWS instrument in the form of radio data.

Hope this helps.

[Quark (Trevor)]

Originally Posted by Hypnotist

Hey Trevor,

Great images of Jupiter! Do you think I could do the same thing with my new Celestron CGE 1400 Pro EdgeHD?

Clear skies and thanks

Bart

Thanks Bart, I am sure your setup would be capable of taking super images of the planets. There are many people around the world doing great stuff with scopes like yours.

The images I have posted in this thread are not very good, the seeing has generally been pretty ordinary this apparition for most in Australia.

Seeing is the determining factor with planetary imaging. In good seeing it is possible to make excellent images.