Blue spots on Jupiter ?

Hello,

Saturday night, I took a picture of Jupiter, low turbulence but poor seeing.
The result is here http://images.ciel.free.fr/test/jupiter_10_04_04.jpg
You can clearly see blueish spots near one of the equatorial belt.
Is this color normal for Jupiter, or is there a problem with image
processing ?

The general color of the planet seems to fit with what I saw in the
eyepiece, so I think that the white balance is not so bad.

--
Norbert. (no X for the answer)
======================================
knowing the universe - stellar and galaxies evolution
http://nrumiano.free.fr
images of the sky http://images.ciel.free.fr
======================================

You can clearly see blueish spots near one of the equatorial belt.
Is this color normal for Jupiter, or is there a problem with image
processing ?

Hi:

Your image does seem skewed a little to the yellow-green, but blue festoons,
spots and other features are not unusual on Jupiter.

Peace,
Rod Mollise
Author of _Choosing and Using a Schmidt Cassegrain Telescope_
Like SCTs and MCTs?
Check-out sct-user, the mailing list for CAT fanciers!
Goto http://members.aol.com/RMOLLISE/index.html

Like this?

http://www.popastro.com/sections/planet/jup_disturb.htm


"Norbert" wrote in message
. ..
Hello,

Saturday night, I took a picture of Jupiter, low turbulence but poor
seeing.
The result is here http://images.ciel.free.fr/test/jupiter_10_04_04.jpg
You can clearly see blueish spots near one of the equatorial belt.
Is this color normal for Jupiter, or is there a problem with image
processing ?

The general color of the planet seems to fit with what I saw in the
eyepiece, so I think that the white balance is not so bad.

--
Norbert. (no X for the answer)
======================================
knowing the universe - stellar and galaxies evolution
http://nrumiano.free.fr
images of the sky http://images.ciel.free.fr
======================================

I've imaged such things before, through a variety of telescopes and image
processing techniques. They do appear in Voyager and Galileo images, so
it's not unheard of. One of the things about imaging the planets is that
you can get better resolution of features, and certainly better
black-and-white and color contrast, than you can with the eye.
--
Sincerely,
--- Dave

----------------------------------------------------------------------
A man is a god in ruins.
--- Duke Ellington
----------------------------------------------------------------------

"Norbert" wrote in message
. ..
Hello,

Saturday night, I took a picture of Jupiter, low turbulence but poor
seeing.
The result is here http://images.ciel.free.fr/test/jupiter_10_04_04.jpg
You can clearly see blueish spots near one of the equatorial belt.
Is this color normal for Jupiter, or is there a problem with image
processing ?

The general color of the planet seems to fit with what I saw in the
eyepiece, so I think that the white balance is not so bad.

--
Norbert. (no X for the answer)
======================================
knowing the universe - stellar and galaxies evolution
http://nrumiano.free.fr
images of the sky http://images.ciel.free.fr
======================================

David Nakamoto nous a écrit :

I've imaged such things before, through a variety of telescopes and
image processing techniques. They do appear in Voyager and Galileo
images, so it's not unheard of. One of the things about imaging the
planets is that you can get better resolution of features, and
certainly better black-and-white and color contrast, than you can
with the eye.

OK, thank you for your answers.
So my picture is not so bad, at least for the colors. For details, I'll have
to wait for a clearer night.

--
Norbert. (no X for the answer)
======================================
knowing the universe - stellar and galaxies evolution
http://nrumiano.free.fr
images of the sky http://images.ciel.free.fr
======================================

Hi
I also noticed last Saturday night that the
GRS has more color in the center of the storm
than what I remember. Maybe we are getting
some of the famous color back. I only noticed
this when the GRS was towards the edge. It
may have been a shadow of the cloud structure??
Dwight

Or probably limb darkening effects, making things look darker on the limbs,
even when the "phase" is full on a planet. I've seen this on CCD images
also.
--
Sincerely,
--- Dave

----------------------------------------------------------------------
A man is a god in ruins.
--- Duke Ellington
----------------------------------------------------------------------

"dwight elvey" wrote in message
om...
Hi
I also noticed last Saturday night that the
GRS has more color in the center of the storm
than what I remember. Maybe we are getting
some of the famous color back. I only noticed
this when the GRS was towards the edge. It
may have been a shadow of the cloud structure??
Dwight

(dwight elvey) wrote in message . com...
Hi
I also noticed last Saturday night that the
GRS has more color in the center of the storm
than what I remember. Maybe we are getting
some of the famous color back. I only noticed
this when the GRS was towards the edge. It
may have been a shadow of the cloud structure??
Dwight

In recent photos I have taken of Jupiter, I also see a deeper red
center in the GRS. The effect is like the pupil of an eye. The blue
spots have shown up also. I wonder if they are similar to the blue
hotspots like the one the Galileo probe fell through - clear spots
showing underlying hot cloud layers?
Clif

Clif wrote:
(dwight elvey) wrote in message . com...

Hi
I also noticed last Saturday night that the
GRS has more color in the center of the storm
than what I remember. Maybe we are getting
some of the famous color back. I only noticed
this when the GRS was towards the edge. It
may have been a shadow of the cloud structure??
Dwight


In recent photos I have taken of Jupiter, I also see a deeper red
center in the GRS. The effect is like the pupil of an eye. The blue


I've noticed this in my photos over the last month as well, and wondered
if it was something in my processing. Cool. - Chris

I recall seeing a darker swirl emanating from the center of the GRS at
AstroFest99 (observed w/an AP 10" Mak-Cass).


"Clif" wrote:
In recent photos I have taken of Jupiter, I also see a deeper red
center in the GRS. The effect is like the pupil of an eye. The blue
spots have shown up also. I wonder if they are similar to the blue
hotspots like the one the Galileo probe fell through - clear spots
showing underlying hot cloud layers?