The Dutch Observatory

Finally some good seeing conditions!!  I made 6 images over the span of 1/2 hour.  Than changed the barlow and used the Celestron Shorty plus with my 1 1/2″ extension tube and made two more images.  the increased size of the image required me to drop the exposure time from 1/77 sec to 1/19 sec and had to adjust the gain also.

The top thumbnail links to the animation showing Jupiter’s rotation for 1/2 hour and also shows the moon Ganymede orbitting behind Jupiter while it looks like it is appraoching the planet from the left.  Callisto is passing in front of the disk closing in on the preceding limb. (black dot)  Europa is moving accross the disk towards the CM in the Equitorial Zone.  Some of the images also had Io on the right of the planet, but I did crop that out, since not all images had this.

Following Tuesday evening we had some terrible storms.  However we did not get the worst.  Other areas of Atlanta were much worse of than we were.  In addition, my house is at a high elevation compared to many other areas, so we did not have any flooding at all.  Thursday night, the sky opened up again, but unlike the West side of the state, 60 miles East of Atlanta we had mediocre tranparency, but because I had “image fever” I did setup again and the result is not much better than the bad images of  Tuesday.  Here one of my images of Thurday evening.

We have had over two weeks of rain, clouds and other terrible weather. This as the first night where I could see some stars. The transparency was terrible but stability was OK, so I setup and probably made the worst image of this season. You can call it the “Image of Desperation”

The beginning of September was quite exciting for me.  The final version of the Jupiter Scar animation was made and contained data from July 19 until September 9th and contained images from the following individuals:  Anthony Wesley, Damian Peach, Donald Parker Joel Warren, Paulo Casquinha, Stephen Keene, Mike Salway, Michael Phillips, Trevor Barry, Christopher Go, Tomio Akutsu, Stefan Buda, Brian Combs, Fabio Carvalho, and Zac Pujic, while Hans Joerg Mettig provided the polar projection conversions.  Thanks again guys!!  Different versions of the animation made it on SpaceWeather.com (August 7, 2009), Sky and Telescope, and even on NASA’s APOD (September 8, 2009 Picture of the day).

Since NASA misstated their activities around the confirmation of the scar in the APOD, I decided to make a small movie of the events around the scar and included the animation to give a true timeline.  Here the short movie (3 1/2 minutes and 20 MB)

Another night with great comparative “great”  seeing.  (Can’t wait for it to really get good )  Anyway, this was also the first night with my new WO barlow.  I figured that this barlow gets me an f/15 instead of the f/13 with the other.  I also did some experimentation with capturing at different gamma levels as well as a little difference im my processing.  Here four images from tonight’s session.  These images show the GRS on the preceeding side of the planetary disk, while the remnants of the Impact scar start coming up on the rising F-limb.

Another night of good seeing in the forecast.  This time I captured I captured three images while the GRS is rising on the following limb.

Well, finally the streak of bad weather, cloud covers and rain stopped and we had a day of better than everage conditions, so I took the opportunity to image Jupiter again.  Here two images of four which I took showing Jupiter with Io half way between the rising limb and its shadow just on the planets surface, while the Bird’s Strike is ready to leave the disk on the preceding limb.

Last night the “Bird’s Strike” remnants were visible for me during the 3 hour window when I can see Jupiter from my home.  Here one of the images.  The dark spot really has expanded and I believe I can see the three seperate blobs.  (See larger inset)

I finished processing my RGB images of Jupiter with Calista, its shadow while Ganymede was tracking behind the planet.  Here two images.  The first one from before the shadow left the limb and the second after the shadow disappeared, but before Ganymede disappeared in Jupiters shadow.  (See animation on the previous post)

Conditions were a lot better than we have had in a long time. Seeing was probably up to 6 and transparency up to 8. I made a total of 48 channel images between 3.46 and 4.46 UT of which a series of 6 was Red only.

I did image Jupiter and two of its moons. I made an animation using the red channels only of Calista passing over the disk while its shadow left the disk, while Ganymede was passing behind Jupiter and disappeared in Jupiter’s shadow.  I will be trying to use the RGB images to make a color version, but Ganymede moves pretty fast accross and I have problems lining up its color channels.