Coronal rays

This highly enhanced image of the solar corona shows polar rays up to 7 solar radii. The enhancement of extremely faint structures in the images was possible thanks to precise work of Constantinos Emmanouilidis who sent us excellent data without any defects. He cleaned the camera sensors by himself so perfectly that there was no single defect caused by dust particles on the chip! The used optics was without any detectable reflections.
Click on the image or on the following reference to display the higher resolution image version (2.1 MB, PNG format).

Date01. 08. 2008
Time2nd contact 10:44:28 UT, 3rd contact 10:46:46 UT
Total eclipse duration 2 m 18 s
PlaceRussia, Novosibirsk, Akademgorodok, near hotel Zolotaya Dolina
CoordinateE83°05'44", N54°50'31", alt. 156 m
ConditionsExcellent - clear sky, altitude of the Sun above the horizon 30°
OpticsTakahashi FS60C with field flattener, focal length 373mm, f6.2
CameraCanon 350D modified with Baader filter (ISO 100)
Exposure1/30 s - 6 s
ProcessingComposition of 31 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 Hana Druckmüllerová and Miloslav Druckmüller
SoftwareAstro D3F 2.0, PhaseCorr 6.0, LDIC 5.0, Corona 4.1, Sofo ACC 6.1
OrientationImage must be rotated 38.2° clockwise to achieve standard orientation i. e. North up.
Copyright© 2008 Constantinos Emmanouilidis, Hana Druckmüllerová, Miloslav Druckmüller

Miloslav Druckmüller
Institute of Mathematics, Faculty of Mechanical Engineering
Brno University of Technology, Czech Republic
Page last update: 19.3.2009