K3's Astronomy - Mercury
"When I consider your heavens, the work of your fingers, the moon and the stars which You have set in place, what is Man that You are mindful of him?" -- Psalm 8:3,4

Mercury Transit of Face of Sun (7.5.2003)

!!!New!!! Mercury exit sequence and animation.

During Mercury transit I captured 3.5GBytes data. It will take me some time to process all data.
Here are actual results:

Note about time measurement: An hour before observation I adjusted my clocks according to TV teletext time (rather high precision) with error less than 0.5 second. In the observing place I adjusted computer time according to my clocks. The time of AVI frames was calculated according to file's date-time (it shows only even seconds). Estimated precision is about ±1 second, maximum ±2seconds.


Click the image tosee picture with higher resolution (3.00"/pixel).
You can also look at high resolution image 1024x1024 pixels (2.00"/pixel)
here.
7.5.2003, 09:50:30 (07:50:30 UT)
Resolution: 6.00 arcsec/pixel
Camera: Nikon Coolpix 995, f=29.7mm
Telescope: 80mm F5 Refractor, 25mm eyepiece afocal
Filter: Baader AstroSolar™ foil sun filter
Result focal length: 475.2mm (~58X Zoom)
Result focal ratio: F5.94
Exposure: 4x 1/1000s (ISO100, auto white balance)
Camera control: The Force software
Processed by K3CCDTools, then in Corel PhotoPaint.

Click the image tosee picture with higher resolution (0.96"/pixel).
7.5.2003, 09:05:14 (07:05:14 UT)
Resolution: 1.92 arcsec/pixel
Camera: Vesta 675SC2 with Barlow 3X, IRB filter
Telescope: 80mm F5 Refractor
Filter: Baader AstroSolar™ foil sun filter
Result focal length: 1200mm
Result focal ratio: F15
Exposure: 22x 1/125s (auto white balance)
Processed by K3CCDTools, then in Corel PhotoPaint.

Mercury exit animation (40s interval between frames)

You can see higher resolution animation and browse through it frame by frame by using K3's Astro Video Player - click the relevant icon:


1.44"/pixel, 194kB

0.96"/pixel, 476kB

Be patient, please, while sequence is loaded.

Exit of Mercury, 7.5.2003, 12:24:26-12:31:46 (10:24:26-10:31:46)
Resolution: 0.96 arcsec/pixel
Camera: Vesta 675SC2 with Barlow 3X, IRB filter
Telescope: 80mm F5 Refractor
Filter: Baader AstroSolar™ foil sun filter
Result focal length: 1200mm
Result focal ratio: F15
Exposure: series of ~22x 1/125s (auto white balance)
Processed by K3CCDTools, then in Corel PhotoPaint.
Seeing: strong wind

The animation on the left side shows the exit stage of Mercury during 7 min and 20 sec. Unfortunately, the strong wind destroyed many frames in AVI (blurred because of rapid movement).
The frames for animation were created from 1.15GB AVI by stacking about 22 frames series. The whole AVI was divided to sections with length of 50 frames per section (i.e. 10s interval). From each section the best 20-25 frames were stacked. All frames were aligned manually in K3CCDTools (no available program was able to align them automatically, because of movement of Mercury). Stacking was done in X2 mode (for better result resolution).
Then K3CCDTools were used for extracting G-channel from frames (the new feature of K3CCDTools, not present in current public release). G-channel is significantly sharper than grayscale image (remember, I used cheap achromatic refractor).
Result frames were loaded again in K3CCDTools and aligned for animation. Then they were exported to AVI file (still in X2 mode with resolution 960x720 pixels).
AVI file was processed in VirtualDUB program (used bicubic resize filter + unsharp mask 3, 15, 0).
As VirtualDUB generates only 24-bit not compressed AVIs, the result AVI files were converted to grayscale by means of K3CCDTools.

The animation on the left side shows frames in interval of 40s (reduced size). The speed is about 100x faster than real speed.
Click the K3's Astro Video Player icons to see higher resolution animation with interval of 20s.

Exit sequence near T3 contact

Here is contact prediction table for my observation place (time is UT):

T1 T2 T3 T4
05:11:38 05:16:04 10:27:47 10:32:11

In the above sequence picture the T3 contact is visible at 10:27:46UT.

Here are some photos of our expedition. Most of them took my wife Susan. The photos were taken in time when camera was not attached to telescope :-)
In this place I would like to thank to my friend Lubos, who borrowed me his car (blue Seat).


[06:31] My friend Kamil and me are preparing our equipment

[06:32] Overall look to our observing post

[09:04] Focusing in open field was really hard task. The notebook screen was not visible on direct sun light.

[09:05] Detailed view of observing post

[09:12] My wife Susan also appreciated Sun "observation" with closed eyes ;-)

[09:12] Our equipment - Kamil's 8" F4 GS Optical Newtonian and my 80mm F5 refractor

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Last Update: 20.5.2003