Corona up to 5 solar radii
This image was made from data obtained by means of two different optical systems. The first one was
my old but excellent Russian Maksutov-Cassegrain 3M-6A, 6.3/500 mm. The second one was new GSO
Ritchey-Chrétien with 203 mm diameter and 1624 mm focal length. Both equipped with computer
controlled (Linux Fedora Multican program made by Jindřich Nový) Canon EOS 5D cameras. The equipment
was placed on a massive ultra-precise Astelco NTM 500 mount. During the totality 64 (3M-6A) and 89
(GSO) images were taken with both cameras. Because the sky was not absolutely clear during the whole
totality it was necessary to remove all images significantly influenced by clouds. It was especially
complicated task for wide angle 500mm focal length optics. Finally 23 (3M-6A) and 61 (GSO) images
were chosen. These images were calibrated by means of over 1000 dark frames and flat-field images.
The position of the Moon represents the situation 157 seconds after the second contact. It is
possible do identify over 130 stars down to magnitude 11 in this wide angle image.
Click on the image or on the following reference to display the
higher resolution image version (2.2 MB, PNG format).
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| Image | Tse2010t_500mm_1.png |
| Date | 11. 07. 2010 |
| Time | 2nd contact 18:45:36 UT, 3rd contact 18:50:05 UT
Total eclipse duration 4 m 29 s |
| Place | Tatakoto Atoll, French Polynesia |
| Coordinate | S 17° 20' 39.3'', W 138° 27' 3.1'', Alt. 6 m |
| Conditions | Partially clear, partially thin clouds |
| Optics | (1) Maksutov-Cassegrain 3M-6A, 6.3/500 mm
(2) GSO RC 8'', Ritchey-Chrétien f/8, 203 mm/1624 mm |
| Camera | (1,2) Canon EOS 5D digital camera (ISO 100) |
| Exposure | (1) 1/250 s - 8 s
(2) 1/500 s - 2 s |
| Processing | Composition of 84 eclipse images (23 (1), 61 (2)). Eclipse images calibrated by means of dark frames and flat-fields, aligned by means of phase correlation, composed by means of LDIC 5.0 software, processed using Corona 4.1 in order to visualize coronal structures. Final processing was done using ACC 6.1 software.
Image processing by Miloslav Druckmüller |
| Software | Astro D3F 2.0, PhaseCorr 6.0, MPA 1.0, LDIC 5.0, Corona 4.1, Sofo ACC 6.1 |
| Orientation | Image must be rotated 6.25° anti-clockwise to achieve standard orientation i.e. solar north up. |
| Copyright | © 2010 Miloslav Druckmüller, Martin Dietzel, Shadia Habbal, Vojtech Rušin |
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Miloslav Druckmüller
Institute of Mathematics, Faculty of Mechanical Engineering
Brno University of Technology, Czech Republic
druckmuller@fme.vutbr.cz
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Page last update: 27.11.2019
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