Corona up to 15 solar radii

This wide-angle image is a composition of two sets of images taken from two different places near Longyearbyen. The first set was acquired by means of Nikon D800E camera equipped with Nikon 2/200 mm lens. The second set was acquired by means of Nikon D810 camera and TS Apochromatic 7/800 mm lens. It is possible to identify at least 190 stars in the image, the faintest one is of mag. 9.8. The quality of the image is surprising if you take into consideration that the solar center was only 11.3° above the horizon and the image bottom only about 8 deg. You may compare this eclipse image with SOHO LASCO C2 and C3. The full resolution image may be found here.
Click on the image or on the following reference to display the higher resolution image version (1.5 MB, PNG format).

Date20. 03. 2015
Time(1) 2nd contact 10:10:47 UT, 3rd contact 10:13:14 UT
(2) 2nd contact 10:10:40 UT, 3rd contact 10:13:08 UT
Place(1) Svalbard, UNIS observatory near Longyearbyen
(2) Svalbard, Longyearbyen airport
Coordinate(1) N 78° 12' 09.1'',   E 15° 49' 44.5'',  Alt. 15 m
(2) N 78° 14' 48.6'',   E 15° 29' 21.3'',  Alt. 15 m
ConditionsClear sky
Optics(1) Nikon 2/200 mm
(2) TS Photo Line Apochromatic Triplet D=115 mm, f = 800 mm with 2.5 inch flattener
Camera(1) Nikon D800E
(2) Nikon D810
Exposure(1) 1/4000 s - 2 s
(2) 1/1600 s - 4 s
ProcessingComposition of 48 eclipse images - (1) 19 images and (2) 29 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, LDIC 5.0, Corona 4.1, Sofo ACC 6.1
Copyright© 2015 Miloslav Druckmüller, Shadia Habbal, Peter Aniol, Pavel Štarha

Miloslav Druckmüller
Institute of Mathematics, Faculty of Mechanical Engineering
Brno University of Technology, Czech Republic
Page last update: 27.11.2019