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Coathanger CR 399

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Posts Made By: Brian Risley

December 3, 2004 04:26 AM Forum: Telescope Making

Hurst motor repair or replacement

Posted By Brian Risley
Is this the Synchron motors now made by Hansen?
If so, I can provide some info on this.
Brian

December 14, 2004 03:17 PM Forum: After Dark

Geosynchronous Satellites

Posted By Brian Risley
In the mid 80's we were watching flashing satellites. These would appear each night and flash about every 3-6 seconds and would slowly fade out after about a minute. We put a scope on one one night and discovered that they were geosynchronous. We could watch the pulses for another few minutes in the scope and then it finally settled down to a steady light. Evidently some sort of solar reflection that was very narrow, as it would occur about 4 minutes earlier each night. I have never stumbled on one by accident like you did.
Brian

February 11, 2005 03:53 AM Forum: After Dark

Planetary/Lunar imaging starparty in Fla-Whos in?

Posted By Brian Risley
Mike,
I am in Cape Coral, so keep me posted if you are doing something.
I used to observe at Burn's Lake outside of Ochopee. Where were you considering going?

Brian

February 11, 2005 04:14 AM Forum: Celestron

Re: RFT Adapter

Posted By Brian Risley
That's the newer model. The older model used the standard diagonal with a special thread adapter from t thread to the diagonal thread. It had a t adapter that was about 1/2 the length of the normal t adapter and the standard f5 telecompressor. (I actually had someone make me the special T to diagonal thread adapter after I saw the unit in the early 80's. (I had extra t adapters, diagonals and a telecompressor, so it made sense to do it instead of buying a unit.
The vignetting was an issue with the telecompressors, especially with photography. It created a round image on the 35mm frame. Visually, unless using a real wide field eyepiece, it was no problem. (I used the Meade 20mm Erfle with mine all the time back in the 80s and liked it.)
Brian

February 22, 2005 04:51 AM Forum: Equipment Talk

The Terminagler cometh.

Posted By Brian Risley
That thing looks bigger than some of the small maks!

May 29, 2005 07:34 AM Forum: CCD Imaging and Processing/Solar System

Jupiter 5/28

Posted By Brian Risley
Here's another. Same setup except I added an extension tube after the barlow, which appears to have made it 3 or 4x vs 2x. Around 975/1200.

June 19, 2005 04:21 PM Forum: CCD Imaging and Processing/Solar System

Jupiter 6-18

Posted By Brian Risley
Another image a little later. Same setup, didn't get the frame counts.

June 19, 2005 08:14 PM Forum: CCD Imaging and Processing/Solar System

First Lunar images

Posted By Brian Risley
Here is another

June 20, 2005 01:20 AM Forum: CCD Imaging and Processing/Solar System

Jupiter, Io, Ganymede 06/18/05

Posted By Brian Risley
Nice shot. We both were imaging at about the same time. You have a little apeture and camera quality on me! wink

June 20, 2005 02:57 AM Forum: CCD Imaging and Processing/Solar System

Jupiter 6-18

Posted By Brian Risley
Ok, after seeing Wes's I had to look through mine again.
This image shows some of the detail that he got with his at about the same time. I am quite pleased that my c-8 got this much detail! Can't wait to try Mars!

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