Inner corona

This image shows typical corona for solar maximum which is very different from corona during 2008, 2009 and 2010 eclipses. The Sun was only 13° above the horizon and observing conditions were not absolutely perfect. That is why I was afraid that to achieve the quality of eclipse images typical for several previous eclipses is impossible. The result was a pleasurable surprise for me. The only clearly visible difference in quality from previous eclipse images is the worse visibility of the lunar surface which is, of course, highly unimportant. The contrast of lunar surface was significantly lowered by thin high clouds. The influence on display of inner corona was negligible. The full resolution image you may download here.

Click on the image or on the following reference to display the higher resolution image version (1.9 MB, PNG format).

Date13. 11. 2012, (14. 11. 2012 local time)
Time2nd contact 20:37:39 UT, 3rd contact 20:39:39 UT
Total eclipse duration 2 m 0 s
PlacePalmer River Road House, Queensland, Australia
CoordinateS 16° 7' 39'',   E 144° 46' 26'',  Alt. 441 m
Conditionsvery faint high clouds
OpticsTakahashi TSA 102, 816mm, F8, Field flattener TOA-35
CameraCanon EOS 5D (ISO 100) - computer control Solar Eclipse Maestro
Exposure1/1000 s - 8 s
ProcessingComposition of 41 eclipse images. Eclipse images were calibrated by means of dark frames and flat-fields (totally 1621 images), 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 6.0, Corona 4.1, Sofo ACC 6.1
NoteThe graph above the table shows the average values of the relative number of sunspots in which the red line indicates the time of 2012 eclipse. The data from the World Data Center for the sunspot index, (Solar Influences Data Analysis Center, the Royal Observatory of Belgium) were used.
OrientationImage must be rotated 23.75° clockwise to achieve standard orientation i. e. solar North up.
Copyright© 2012 Constantinos Emmanouilidis, Miloslav Druckmüller

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