Observations of the transit of Mercury on May 7th, 2003

by Phil Harman
from Connah's Quay, North Wales
using a Tal-1 4.5" Newtonian reflector
with 25mm eyepiece projection
photographed using an Olympus C3000Z


team and equipment

members of my observing team preparing for the event with some background reading



equipment and clouds

at around 0800UT, a partial break in the cloud cover



no clouds at 0822UT

at 0822UT, mercury (top left) and serveral sun spots (1 left of centre, and 3+ at bottom) visible without clouds!



no clouds at 0822UT (detail)

at 0822UT, detail of above image showing mercury (left of centre) and eliptical sun spot (bottom right)


"The heavens declare the glory of God,
the skies proclaim the work of his hands!"
Psalm 19:1

Additional Notes

The above images were processed from 2048x1536 originals using Adobe Photoshop 7 (for brightness and contrast alone). The final image was taken at f11, 1/80, "ISO 100" with a 14mm focal length. Actually, I had quite a lot of difficulty taking the photographs of the projected image. This was because the camera doesn't do close focus or helpful exposures in program mode. I took a number of shots and then went to check them on my PC. Sadly, all were poorly exposed and badly out of focus. So I switched to manual exposure and focus. However, it is very hard to focus this camera accurately on this kind of image! To make matters worse, the Tal-1 has a manually driven German equatorial mount,and the camera was mounted on a tripod. Every time I moved the Tal-1 to track the Sun I had to refocus the camera. The final challenge was the weather. There were only a few minutes when an image could be projected without high cloud spoiling the image.

Special thanks to John King for phoning me to tell me the transit was in progress (I had completely forgotten). John, you are a great uncle! :)

Copyright © 2003, Phil Harman
This page last updated May 11, 2003
Part of the harpeople.net website