土星 ALPO-Japan Latest
Saturn Image 2015/08/08(UT)
Trevor Barry,Peter Edwards,Milika-Nicholas
Imaged Saturn Aug 8th targeting the +63 spot. In particular I was keen to test the accuracy of my ephemeris which predicted the spot to be at the CM at 9:00 UTC. I captured 3 sets of 685nm IR data with the 2nd set centred on 9:00 UTC. I measured the spot to be within 3 L3 degrees of the ephemeris prediction so clearly this ephemeris remains quite reliable based on a L3 drift of 11.4 deg/day.
Trevor Barry(406mm Newtonian)|
The seeing was quite ordinary but this feature is still easily seen.
My animation of that data is also attached here.
[Trevor Barry:Broken Hill:Australia]
Peter Edwards(C14 355mm SC)|
Here is an IR luminance + colour data image taken with the ASI224MC. At 20° altitude the colour data is horrible (no ADC)
with the seeing we have had over the past few weeks. The sensitivity of the 224MC camera into the IR allows me to make
a reasonable quality Lum image for combination with the colour data. It's a pain to have to remove the camera and replace
the filter but worth it for the improvement in the image. I have included the unprocessed stacked colour image for comparison.
Amazing what the software will pull out of the mush.
[Peter Edwars: West Sussex United Kingdom]
Milika-Nicholas (355mm SCT)|
Both images,but especially the North Polar Projection map,give a very good
view of the dark spot & associated rift/features - the left hand image in
the NPP image showing the latitude etc of the dark spot,as per WinJupos.
Keisaku Horii (305mm Newton)|
≪兵庫県姫路市 堀井恵策≫[Keisaku Horii : Himeji Hyougo Japan]