Solar corona
This image is made from 21 images taken with two different cameras on color negative film.
Excellent observing conditions and the Sun not far from the zenith enabled to create an
image of very good quality. The faintest star visible
in the image is of magnitude 6.2.
Click on the image or on the following reference to display the
higher resolution image version (1.2 MB, PNG format).
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| Image | Tse1991wa_in04.jpg |
| Date | 11. 07. 1991 |
| Time | 2nd contact 18:47:52 UT, 3rd contact 18:54:23 UT
Total eclipse duration: 6 min 30 sec |
| Place | La Paz (university), Baja California, Mexico |
| Coordinate | 110.31° W, 24.14°N |
| Conditions | Excellent, clear sky, altitude of the Sun above the horizon: 82° |
| Optics | (1) 500 mm focal length
(2) 80mm Zeiss AS refractor with 2× converter, total FL=2400mm |
| Film | (1) Kodak Vericolor III Professional Type S, 24×36 mm film, (Kodak 5026 VPS)
(2) Kodak Vericolor III Professional Type S, 6×6 cm film, (Kodak VPS 6006) |
| Processing | Composition of 21 images, (1) 13 images 24×36 mm, (2) 8 images 6×6 cm. Images were aligned by means of phase correlation, composed by means of FilmCMP 2.0 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 |
| Scanner | Nikon Super Coolscan 4000 ED |
| Software | PhaseCorr 6.0, FilmCMP 2.0, Corona 4.1, Sofo ACC 6.1 |
| Note | The graph above the table shows the average values of the relative number of sunspots in which the red arrow indicates the time of 1991 eclipse. Graph was created according to data from Sunspot Index Data Center, Brussels. |
| Orientation | Image must be rotated 92.7° anti-clockwise to achieve standard orientation i. e. solar North up. |
| Copyright | ©1991 Peter Aniol, ©2010 Miloslav Druckmüller |
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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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