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Posts Made By: Sol Robbins

April 17, 2004 04:57 AM Forum: Solar System Observing

JUPITER SKETCH 4.16.04

Posted By Sol Robbins
Hi Richard,

Really good seeing conditions as the evening, April 16.2004, progressed.

Of note was the very marbled appearance of the NEB.

Festoons were well defined with the one just preceding the CM being dark.

The sloping dark rift in the SEB also well define. Just south of the rift SEB appeared somewhat brightened.

The southern NPR had a large brightening in the following half that was quite a bit wider than the NNTez is usually. Its somewhat overemphasized in my sketch so you can see it better.

The STB sloped southward on the following side. The northern edge of the SPR was much darker than usual.

I think System 1 @ 43 and System 2 @ 298. That's a rough estimate.

Best, Sol Robbins

April 21, 2004 03:34 AM Forum: Solar System Observing

04.20.04--Jupiter Sketch

Posted By Sol Robbins
Hi,

I had excellent seeing conditions. The best in a long time plus I didn't have to wear a jacket. Nice to observe without being cold.

Even though Jupiter is shrinking I believe there's still alot of detail to be seen. I believe this sketch to be one of my best in rendering the GRS and SEB as as compared to how I saw it.

Of note is how large and fuzzy the festoons are. The NEBs was scalloped in appearance and the NEB was delicately marbled. Softer in appearance than I had rendered it.

The NNTEZ was well define and seen well only twice during this current apparition, (tonight and last April 16th). The NNTEB was also well defined tonight.

The SPR continues to show a darkened polar cap and a rather thick dark belt just south of the polar cap.

I'll be gone for a couple of weeks.

Best, Sol Robbins

May 10, 2004 04:00 AM Forum: Solar System Observing

Jupiter Sketch May 5, 2044

Posted By Sol Robbins
Hi,

I had good conditions tonight for Jupiter observing.

Of note was the rift preceding the GRS, and some light spots on the preceding half of the SEBn.

A bay was somewhat prominent on the NEBn near the CM, with marbling evident throughout the NEB.

Thanks, Sol Robbins

May 17, 2004 03:28 AM Forum: Solar System Observing

Jupiter 05.16.04

Posted By Sol Robbins
Hi,

I had roughly average to slightly better than average for observing Jupiter. The accompanying sketch doesn't really show anything unusual. I think that's Callisto which appeared rather dark against the NNTeB.

What was unusual is that I used the 4.4" ,(112 m.m.), aperture stop with my scope. In concert with my Chromacor II, the effective focal ratio is at f/10. I guess I just wanted to see what kind of detail I could pick up on at a smaller aperture.

Best, Sol Robbins

May 24, 2004 02:58 AM Forum: Solar System Observing

May 23, 2004 Jupiter Sketch

Posted By Sol Robbins
Hi,

The mosquitoes and I had solid 8P seeing conditions for Jupiter.

Of note was Io's shadow.

The SSTeZ gently sloped and closed up from the following toward preceding sides of the disk.

Just preceding the CM was a white spot in the SEB rift.

Festoons appeared chaotic with more subtle shadings throughout the EZ than I was able to render.

The NEB was very marbled and bay-like features were very noticeable. I say bay-like becuase they didn't appear to be bays in the classic sense.

There also was a plume coming out of the NNTeB into the NTeZ. This is the first time I've seen a feature like this at this location.

Best, Sol Robbins

November 4, 2004 10:39 AM Forum: Solar System Observing

Saturn Drawing 11.03.04

Posted By Sol Robbins
Hi,

Finally had good seeing for observing Saturn. The tilt of the rings is a bit different from the last apparition. I saw a little bit more detail than I was able to render as some high thin clouds rolled in during the last 5 minutes while sketching.

Anyway, I am always amazed at what my 6" scope is able to show when seeing is good.

Best, Sol Robbins

November 7, 2004 04:53 PM Forum: Solar System Observing

----Saturn Sketch 11.07.04-----

Posted By Sol Robbins
Hi,

Again I had relatively good seeing and transparency.

This time I used my 9.7" reflector.

I am a bit surpised at some similarities between the sketch and Christopher Go's great image.

I also looked to see if the northern edge of the disk was just visible beyond the A ring. This time I really can't say I saw it.

Best, Sol Robbins

November 14, 2004 09:45 AM Forum: Solar System Observing

11.14.04 Saturn

Posted By Sol Robbins
Hi,

Had best observing conditions so far for Saturn this morning.

Nothing unusual except B ring details.

Best, Sol Robbins

December 16, 2004 08:01 AM Forum: Solar System Observing

Saturn Sketch December 16, 2004

Posted By Sol Robbins
Hi,

Seeing took several hours to settle down. By 1 a.m. seeing was good enough to sketch by.

Nothing unusual about Saturn except the polar hood was nicely defined. The EZn seemed a bit darker than the EZs. SEBn had a mottled appearence as well.

Best, Sol Robbins


December 26, 2004 08:56 AM Forum: Solar System Observing

--Saturn Sketch 12.26.04--

Posted By Sol Robbins
Hi,

I had exceptional seeing conditions for this Saturn observation with my 6" refractor. A sharp image was maintained at 428x though 350x & 375x showed details and contrast better.

The SEBn was mottled.

The SPR was well defined. Minor belts were a bit easier to see. The EZn is still darker than the EZs and is split by a thin but darker dividing line.

The Enke Minima presented a somewhat split appearance that was symetrical at the ansae.

I hope everyone had a good holiday,
Sol Robbins


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