Corona up to 6 solar radii
80 images were taken during 5 m 41 s long totality by means of a Canon EOS 5D digital
camera equipped with my old well-tried Russian Maksutov-Cassegrain 6.3/500 mm. Unfortunately
the absolutely clear weather several minutes before the totality was interrupted by a small cumulus
cloud and a part of the total eclipse was lost. After careful inspection of all eclipse images, 38
images which were not influenced by clouds were chosen. These images were calibrated by means of
about 300 dark frames and about 100 flat-field images. The resulting image is finally over my
expectation and the influence of clouds nearly negligible. The position of the Moon represents the
situation 136 seconds after the second contact i. e. 03:30:55 UT (15:30:55 local time). The
display of the solar corona, lunar surface and stars in the resulting image are highly beyond the
ability of human vision during the eclipse. The weakest stars visible in the image are of about
magnitude 10. The stars are a little bit blurred by the motion of the Sun during the very long eclipse.
Click on the image or on the following reference to display the
higher resolution image version (3.8 MB, PNG format).
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| Image | Tse2009e_500mm_mid.jpg |
| Date | 22. 07. 2009 |
| Time | 2nd contact 03:28:39 UT, 3rd contact 03:34:20 UT
Total eclipse duration 5 m 41 s |
| Place | Enewetak Atoll, Marshall Islands |
| Coordinate | 11° 21.546' N, 162° 20.827' E, 3 m altitude |
| Conditions | Partially clear, partially small cumulus cloud,
altitude of the Sun above the horizon 56-57° |
| Optics | Maksutov-Cassegrain 3M-6A, 6.3/500 mm |
| Camera | Canon EOS 5D digital camera (ISO 100) |
| Exposure | 1/250 s - 8 s |
| Processing | Composition of 38 eclipse images. 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 3.7° clockwise to achieve standard orientation i. e. North up. |
| Copyright | © 2009 Miloslav Druckmüller, Peter Aniol, Vojtech Rušin, Ľubomír Klocok, Karel Martišek, Martin Dietzel |
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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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