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Posts Made By: Sol Robbins

February 10, 2004 03:27 AM Forum: Solar System Observing

Sketch of comet 2002T7 - 2/7/04

Posted By Sol Robbins

Hi Tim,

A very nice sketch. I wonder if you originally draw black on white rather than white on black. If you originally do it black on white and then use scanner features to produce a white on black image, try adjusting a feature knowm as gamma.

Some scanner do have the gamma feature and are usually have its setting defualted at 1.00. If you reduce this number to say, 0.85, the middle to dark tones become a bit more saturated. On my planet sketches, I have the gamma set at 0.67.

Again, a really nice sketch and hope that helps, Sol Robbins

February 21, 2004 10:34 PM Forum: Solar System Observing

Jupiter Sketch Feb 20, 2004

Posted By Sol Robbins

Hi & thanks to all.

Basically, Jupiter always has differences going on week to week, as well as apparition to apparition.

I have only been sketching planets at the eyepiece for just a little over a year. I have yet to sketch DSOs since I believe that any illumination will cause a big loss of dark adaptation.

This year, it seems that most of Jupiter's moon transits are placed near or just inside the NEB. I think it would be easier to trace a transit here since the NEB is dark. Last apparition most transits took place in a light colored zone, which makes it a lot harder to observe.

Carlos, hope you get the time and good sky conditions soon.

Thanks again, Sol Robbins


February 28, 2004 08:10 AM Forum: Solar System Observing

First Jupiter Sketch;Help with scan

Posted By Sol Robbins

Hi Thomas,

Thanks. I resized your image. Keep up the good work!

Sol Robbins

February 28, 2004 05:18 PM Forum: Solar System Observing

Jupiter Sketch,grs

Posted By Sol Robbins

Hi Thomas,

You're really starting to pick up on details, especially with the magnifications you're using. Please keep in mind that the sketches may be more about seeing through your scope rather than "art".

I've attached my homemade template for Jupiter for you to print out. It has some stuff lightly shaded in to help get you past the initial belt distribution.

Best, Sol Robbins


March 4, 2004 11:35 AM Forum: Solar System Observing

Jupiter Observation (March 3, 2004)

Posted By Sol Robbins

Hi Carlos,

Great sketch and observation, especially the projection on the NEBn and its connected segment, (NTB?).

Sol Robbins

March 12, 2004 12:07 AM Forum: Solar System Observing

Observing with an ETX, ED80 and 8" SCT (LONG!!)

Posted By Sol Robbins

Hi Anthony,

Thanks for writing up your viewing comparisons using these different scope.

As far as your response to your wife goes, I kind of understand but I only carry out 2 scopes. A 6" refractor on a GEM and a 10" Dob. wink

Sol Robbins

March 17, 2004 01:02 AM Forum: Solar System Observing

jupiter - the movie

Posted By Sol Robbins

WOW!

Sol Robbins

March 29, 2004 01:39 AM Forum: Solar System Observing

Triple transit sequence

Posted By Sol Robbins

Hi Paul,

My seeing was horrible as well. Still, as your images show it was a nice event to witness.

Best, Sol Robbins


March 29, 2004 11:35 AM Forum: Solar System Observing

Jupiter Observation (March 28, 2004)

Posted By Sol Robbins

Hi Carlos,

Great sketch and observing notes.

Sol Robbins

April 20, 2004 05:24 PM Forum: Solar System Observing

Jupiter Observation (April 20, 2004)

Posted By Sol Robbins

Great drawing Carlos. I see you rendered the gright bad0like feature in the NPR. Very interesting NEBn as well.

Thanks for uploading this one, Sol Robbins