Corona from Oregon
This image is a composition of 161 eclipse images acquired with two identical 800 mm
lenses and two Nikon D810 cameras. The observing conditions were rather unique because of an
absolutely perfect seeing. This enabled to create an image of extraordinary sharpness which is
limited only by the movement of coronal features during the total solar eclipse. Another result of
perfect seeing and precise sub-pixel image alignment is the visibility of faint stars below the 13th
magnitude, some of them very near the Sun. It was possible to visualize not only the solar corona but
even the lunar surface surprisingly well. The Moon corresponds to its position 61
seconds after the second contact. The full resolution image may be found
here.
Click on the image or on the following reference to display the
higher resolution image version (2.7 MB, PNG format).
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Image | Tse_2017_mi800.png |
Date | 21. 08. 2017 |
Time | 2nd contact 17:21:11 UT, 3rd contact 17:23:14 UT |
Place | near Mitchell, Oregon, USA |
Coordinate | N 44° 31.539', W 119° 54.459', Alt. 1100 m |
Conditions | Clear sky but some smoke from forest fires, solar altitude 43° above horizon |
Optics | 2× TS Photo Line Apochromatic Triplet D=115 mm, f = 800 mm with 2.5 inch flattener |
Camera | 2×Nikon D810 |
Exposure | 1/1000 s - 1/4 s (camera 1), 1/4 s - 4 s (camera 2) |
Processing | Composition of 161 eclipse images taken with two cameras. Eclipse images were calibrated by means of dark frames and flat-fields, aligned by means of phase correlation, composed by means of LDIC 6.0 software, processed using Corona 5.0 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 7.0, LDIC 6.0, Corona 5.0, Sofo ACC 6.1 |
Orientation | Image must be rotated 18.02° anti-clockwise to achieve standard orientation i.e. solar North up. |
Copyright | © 2017 Miloslav Druckmüller, Peter Aniol, Shadia Habbal |
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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: 26.11.2019
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