Absolute photometry of the corona during the solar eclipse of 1980 February 16

Details Absolute photometry of the corona during the solar eclipse of 1980 February 16 Absolute photometry of the corona during the solar eclipse of 1980 February 16

Sep 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983baicz..34..265r&link_type=abstract

Astronomical Institutes of Czechoslovakia, Bulletin (ISSN 0004-6248), vol. 34, no. 5, 1983, p. 265-276. Research sponsored by th

Astronomy and Astrophysics

Astronomy

9

Astronomical Photometry, Solar Corona, Solar Eclipses, Isophotes, Tables (Data)

Scientific paper

Results of the absolute photometry of the white light corona (1.03 ≤ R_sun; ≤ 6.00) during the solar eclipse of February 16, 1980 are given. These results indicate a maximum-type corona although a deficit in absolute brightness was observed in the neighbourhood of the south pole. At a height of 1.1 R_sun; the ratio IN/IS amounts to 4.39; it decreases rapidly with height and no difference is observed in the neighbourhood of 4 R_sun;. As the eclipse coincided almost exactly with the maximum of sunspot activity No. 21, the ellipticity of the isophotes is small. The Ludendorff index of the corona's shape turns out to be a + b = 0.027, and at phase φ = 0.34 is one of the smallest in the history of eclipses.

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