土星 ALPO-Japan Latest

Saturn Image 2025/05/09(UT)

Clyde Foster,Christopher Go,Andy Casely,Rudolf A.Hillebrecht
C.Foster,Christopher Go,A.Casely,R.A.Hillebrecht

Clyde Foster
By increasing the gain,the rings were visible in the live,onscreen,view with the R610LP filter.
They are also starting to appear in the CH4 with relatively “normal” processing,although the data was rather poor.
Also evident in the RGB enhanced view.



[Clyde Foster : Khomas,Namibia]

Christopher Go
Saturn is now around 30deg and seeing is much better now.  I'm finally able to capture a proper RGB image of Saturn. The rings are now starting to show up in methane band. No interesting feature is resolved on these images.

[Christopher Go : Cebu Philippines]

Andy Casely
Here's the full set from good conditions on the 9th. Interesting observations across RGB and IR. In the IR, using slightly longer exposures, the Cassini Division is clearly resolved now as definition (and light) improves. They are also faintly resolved in the 15ms 'normal' exposure image when that one is further stretched. In RGB, the rings are clearly visible in all filters, and the RGB image has red filter moons, separately brightened, but the rings are in the original RGB image, brightened with a careful non-masked stretch. The rings surface brightness in the raw linear images is now somewhere between Enceladus and Tethys in brightness (they are probably much brighter as I write!).
I've included the red filter with purely linear stretching to show how dark the rings still are, 3 days after equinox. What is also interesting is that the rings are significantly fainter in infrared (with respect to the planet) than in red, green or blue filters.
There might be a small storm in the northern hemisphere red filter, but it may be noise.
Interesting Saturn times!



[Andy Casely,Sydney,Australiaa]

Rudolf A. Hillebrecht
On the northern hemisphere Saturn is still not easy to image. Choose to catch it in daylight. Rings invisible because too faint.

[Rudolf A.Hillebrecht: Bad Gandersheim,Germany ]

ALPO-Japan Latest Saturn Section
2025/05/10
2025/05/08