From: "k.logg" <k.logg@yahoo.com>

Date: July 31, 2006 9:50:23 AM MDT

To: Astro_IIDC@yahoogroups.com

Subject: Transit of Io 16 June 2006

Hi all

This is my first ever image. It was only meant to be an exercise in

familiarising myself with Astro IIDC. It was pure luck that I captured

the transit of Io on the 16 June.

http://groups.yahoo.com/group/Astro_IIDC/files/Planetary/Transit of Io

16 June 2006.jpg 

As I'm new to this I don't know how to quantify the seeing,

transparency. It was clear but not very dark this close to the

Solstice and the atmosphere was pretty turbulent, particular as

Jupiter was so low in the sky. Hence so few frames captured using a

Unibrain Fire-i colour webcam  at f10 on a friend's 8" LX200 (altaz)

Below are the logs from Astro IIDC, any comments will be gratefully

received, as I really have no idea what I'm doing.

Settings for Astro IIDC image capture were as follows;

Gamma:  1.64

Saturation: 36

Blue Gain: 115

Red Gain: 69

Brightness: 102

Black Point: 248

Exposure: 133.33 ms

Settings for Astro IIDC stacking and processing:

Stacking : 8 Bit Movie

CI Cutoff: 60 %

Aligned Using:Luma Channel

Gross Alignment: Planetary

Pixel Alignment: Horizontal and Vertical Separate

Pixel Alignment Block Size: 32 x 32 pixels

Pixel Matching Tolerance : High

Scale Frames by: 1 x

Frame Sharpening: Medium

HighQuality Bayer: Off

Auto Clip Area: On

Averaging Images

Sharpness Statistics: Min 0.759031 , Max 0.833257 ,

STD0.013007 , Mean 0.795522 , Median 0.795564 , Mode

0.793824, CutOff  Value 0.802748

Pixel Noise Percentage: 0.392157

Main Image Centroid   X:243.7, Y:205.8

Pixel Area One Centroid  X:270.7, Y:189.8

Pixel Area Two Centroid   X:234.7, Y:227.8

Stacked 198 out of 680 frames

Final processing using Photoshop.

Best wishes

Cal

PS Apologies to Alan Friedman as I've pretty much copied your method

of presenting the image.