Wide angle image of the solar corona

During the Australian total eclipse the Sun was approximately 13° above the horizon and the sky was not absolutely clear. That is why it was a big problem to create a wide angle image of the solar corona. Fortunately I obtained data from different observing places which were distant enough to decrease the influence of thin clouds but on the other hand not too far (max. 18 s difference of C2). The resulting image is a composition of 141 images taken from 3 observing places. The solar corona is visible up to 5 solar radii. The influence of faint clouds is only slightly visible.
Click on the image or on the following reference to display the higher resolution image version (2.2 MB, PNG format).

Date13. 11. 2012, (14. 11. 2012 local time)
Time(1) 2nd contact 20:37:57 UT, total eclipse duration 121 s
(2) 2nd contact 20:37:43 UT, total eclipse duration 122 s
(3) 2nd contact 20:37:39 UT, total eclipse duration 120 s
Place(1) Mulligan Highway, Queensland, Australia
(2) Maitland Downs, Queensland, Australia
(3) Palmer River Road House, Queensled, Australia
Coordinate(1) S 16° 24.668', E 144° 45.395', Alt. 404  m
(2) S 16° 14.521', E 144° 43.546', Alt. 518  m
(3) S 16° 07.650', E 144° 46.430', Alt. 441 m
Conditionsvery faint high clouds
Optics(1) Canon 70-200mm f/4 L IS USM, set to 200 mm f/4
(2) Tamron Adaptall 2.8/300mm, set to 5.6/300mm
(3) TSA 102, 816mm, F8, Field flattener TOA-35
Camera(1) Canon EOS 50D (ISO 100)
(2) Canon EOS 5D (ISO 200)
(3) Canon EOS 5D (ISO 100)
Exposure(1) 1/1250 s - 4 s, 71 images
(2) 1/2000 s - 1 s, 29 images
(3) 1/1000 s - 8 s, 41 images
ProcessingComposition of 141 eclipse images. Eclipse images were 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
SoftwareAstro D3F 2.0, PhaseCorr 6.0, MPA 1.0, LDIC 5.0, Corona 4.1, Sofo ACC 6.1
Note(1) Man-To Hui
(2) Robert Slobins
(3) Constantinos Emmanouilidis
OrientationImage must be rotated 30.2° clockwise to achieve standard orientation i. e. solar North up.
Copyright© 2012 Miloslav Druckmüller, Man-To Hui, Robert Slobins, Constantinos

Miloslav Druckmüller
Institute of Mathematics, Faculty of Mechanical Engineering
Brno University of Technology, Czech Republic
Page last update: 8.10.2013