Webcam pictures of Mars - 29 July 2003

Mars learning curve Index


Astro Snap tips, vibrations and balancing

I got a nice detailed explanation from the author of Astro Snap to help me to get autoguiding working. This Yahoo group has many discussions and tips on using Astro Snap - I recommend it.

I balanced my telescope very well tonight. Unfortunately there is such a thing as a too well balanced telescope. The balanced telescope caused the telescope to ocillate and the image to vibrate slightly. I only learned about the cause of this strange new vibration this morning so I will implement the fix tomorrow - forcing the telescopes' motors to lift up a slightly front-end heavy tube (OTA).

Here are some excellent tips about the Elimination of Vibrations that I am going to test tonight as well.

I changed my telescope's backlash setting and it works great - slewing in declination is now as instantaneous as slewing in R.A.

Here are some tips for people new to Astro Snap

I left my telescope in sleep mode during the night - with the telescope pointing at the horizon. I started to take pictures at 5:00 in the morning. When I tucked the telescope in for its sleep during the day, I noticed its corrector lens was covered with a LAYER of dust. I did not expect this since I specifically left the telescope horizontal. Guess I was wrong - next time I will cover up the corrector lens as well.

This dust might be the cause of the sub-standard images I have on this webpage today. I discovered it only after I captured all the bitmap frames.


pictures of Mars

Like yesterday, these pictures of Mars look better reduced 50 percent in size.

pictures of Mars

This information is for the picture of Mars on the right.

Date: 28 July 2003 Telescope: 10 inch SCT Bitmaps captured at streaming speed in Astro-Snap: - around 4 fps
Time: 4:35 UT Camera: Logitech Quickcam Pro 4000 Processing: 100 frames stacked out of 1200 (300 seconds)
Observatory: Hartbeespoort Magnification: 3x Tele Vue Barlow Software: Astro Snap, K3 CCD Tools and Photoshop

Mars Apparent Diameter: 22.0 " Illuminated Fraction: 0.956 Distance from Earth: 0.4250 ua Central meridian: 292.44

Disappointing results for this morning.


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