By Christopher Go

JUNE - JULY 2009

July 11, 2009

Condition wasn't great this morning.  Seeing was just average but transparency was poor.  It was mostly cloudy and I had to image though thin clouds.

The GRS is setting on this image.  The SEB is fading.  Not the STrD forming close to the GRS.  Note also the dark cyclonic feature following the GRS.  The STB seems to be reviving with an interesting elongated oval at the CM.

The NEB is quiet here with no outbreaks.  But the NEBn has a lot of large white ovals!  There are also reddish material around these ovals.   Note the striking dark feature on the NTBn.


July 7, 2009

Seeing was average this morning. It was very bad when I started imaging but it improved with time.  Transparency was not good as I had to image through thin clouds.

The red ring of Oval BA is beginning to get prominent again.  Note the white oval following BA.  The SEB looks very quiet.

The NEB  is very chaotic.  A lot of dark features extending for the EZn to the mid-NEB. There outbreak is very complex.

The dark red spots on the NNTB are still prominent. Io is the moon in the image.


July 2, 2009

Condition was good this morning.  Although it deteriorated towards the end of the imaging session.

Oval BA is rising in this image.  The SEB is fading.  The EZ is very complex especially at it's northern edge.  The NEB has a lot of activity.  It seems like the EZ is pushing into the NEB.  Note the rising outbreak on the NEB.  Note the dark red oval  at the NNTB.

July 1, 2009

Seeing was very good this morning.   But transparency was very poor!  My histogram reading was only 40% at 1/15s exposure time and 100% gain!  But because of the good seeing, the images still came out well.

The GRS is at the CM.  It is still very pale.  Note what seems to be a South Tropical Disturbance (STrD) forming following the GRS.    Note a bright white oval preciding the disturbance.  Note also a dark cyclonic oval between the  GRS and the STrD!  The SEB in this region is fading.

The EZ looks complex.  Note the  dark features on the EZn/NEBs region.  Note the dark feature on the NEB especially the protrusions into the NTrZ which was the outbreak region before.   This area is very complex! The white oval on the NEBn are beginning to get prominent.

The region at the NTBn is very complex. 


June 30, 2009

Transparency was  again very poor this morning but better than 2 days ago.

Oval BA can be seen at the CM.    It is very pale!  The SEB looks very red at this region.  The NEB outbreak is rising on the right.  Note the dark red spots on the NNTZ.


June 28, 2009

Transparency was very poor this morning!

The NEB is very busy with a lot of outbreak activity.  The SEB is quiet.


June 27, 2009

I woke up early this morning at around 2:30am but the sky was overcast and raining!  I went back to sleep.  Woke up again just after 4am to see the sky partially cloudy.

Finally a good image of Oval BA.  Although Oval BA is very pale now, the red ring is still distinct.    A white oval has been following BA for some months now.  Will they merge?

The SEB is very dark at this area but it is also quiet.  Europa is transiting the EZ.

The NEB looks quiet at this region but activity is rising on the right.

Note the dark red spots on the NNTZ.

June 21, 2009

The sky was clear this morning!  Seeing was excellent and transparency almost perfect!

The NEB is in full  upheaval!   Outbreaks are all over.  Note the dark oval at the NTrZ. This is reminds us of the  SEB upheaval in 2007.  When the outbreak interacted with the STrD, ovals were formed.  The same thing seems to have happened here when the outbreak interacted with a red oval at the NEBn.

Io is distinct at the EZ.  It is following it's shadow.  The poles of Io are dark.

The SEB is quiet and is very  pale.  The GRS is also pale!

The Disturbance like feature at the NTBn is still prominent.  Below is an animation of my images this morning.

June 19, 2009

I was mostly cloudy this morning.  But transparency improved a little when I was imaging.  Seeing was good.

The GRS is very pale and the SEB has practically shut down.  Fading should begin soon.

The Northern hemisphere is practically undergoing a mini "upheaval"!  The NEB is chaotic.  There are a lot of outbreak activity.    In the NEBn, the outbreak is interacting with a small red oval.  This interaction is causing red material from the NEB to spill into the NTrZ!    Note the dark round feature at the NTrZ which is a remnant of the spill over material.  There is also a white oval just to the west of this dark object. Another one is detaching being carried away by the turbulent NTrZ winds!

At the NTBn, there is an interesting feature that reminds me of the SED two years ago.   But this feature is red instead of white and there is are two of these at the NEBn!

Callisto's  shadow is at the EZ.

June 17, 2009

I woke up around 1:45am local time to catch the GRS.  Jupiter was just over 50 deg above the horizon.  The sky was mostly cloudy with a lot of thin clouds.  I had to image Jupiter through thin clouds so transparency was low.  Seeing was only 7/10.  Monsoon season is finally here.

The SEB has shut down.  There are no more outbreak spots going on.  The "wake" of the GRS is gone!  Will this herald the fading of the SEB?  The GRS is very pale.

As the SEB shuts down, the action is in the NEB.  There is a lot of outbreaks on the NEB and the southern edge of the NEB has a lot of interaction with the  EZ.  At the northern edge of the NEB to the NTrZ is a huge red spot!  This spot is an existing anti-cyclonic spot that can be seen on my April 15 image.  This spot interacted  with the NEB outbreaks (May 28 image) and it has  turned into a HUGE red feature.  Interestingly, methane band images of this object show that this is dark in methane band.  There is also a white outbreak on the southern edge of this feature.  Note the long  dark red bar on the NEB.

The northern edge of the NTB is also very busy.    Note the reddish features at this area. 



June 16, 2009

Condition wasn't good this morning as it was mostly cloudy.  I had a brief "break" with the clouds but transparency was still very bad.

There is a huge red oval on the NTrZ below the GRS.  This is very interesting as there may finally be a counterpart of the GRS on the northern hemisphere!!!  Will this spot last? Is this the White Oval Z before that has turned red? The NEB is really very busy this year.  Note the dark feature on the STrZ!

The GRS is very pale!    It is really a contrast now to see the pale GRS and the very red spot on the NTrZ. 

Note also the NNTZ red oval north of the new NTrZ red oval!!

Note Ganymede on the left.


June 8, 2009

Condition was variable this morning.   There were times of good seeing and sometimes seeing was bad.

Oval BA can be seen in these  images.   The orange ring can be seen but it's very  faint now.

The SEB is very dark and has almost the same color as the NEB.  The EZ is very busy.  Note the dark festoons that seem be mixed up with the NEB outbreak.  Note the bright white spot in the middle of  this outbreak.

June 1, 2009

Condition was surprisingly perfect this morning.   Seeing was very stable with  perfect  transparency.  The detail on these images are very good!

Oval BA is prominent in the first image.  Note the distinctive red ring is still visible though it is rather faint.  Note also the small white oval following Oval BA. 

The SEB looks normal.  Note the tiny red spot on the SEB.  The EZ looks very turbulent.  It is also interesting to note that if you look at the northern edge of the SEB, it seems that EZ bluish streaks are connected to the dark streaks of the SEBn!

The NEB is very busy  with complex outbreaks and rifts.   Note the small  red oval rising on the NEBn.

At the NNTB, there is an interesting red oval. 


Copyright 2009 Christopher Go (chris@cstoneind.com)