Observations of a probable change in the solar radius between 1715 and 1979

Details Observations of a probable change in the solar radius between 1715 and 1979 Observations of a probable change in the solar radius between 1715 and 1979

Dec 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980sci...210.1243d&link_type=abstract

Science, vol. 210, Dec. 12, 1980, p. 1243-1245.

Astronomy and Astrophysics

Astronomy

21

Astrometry, Solar Diameter, Solar Eclipses, Accuracy, Ephemeris Time

Scientific paper

A decrease in the solar radius is determined using the technique of Dunham and Dunham (1973), in which timed observations are made just inside the path edges. When the method is applied to the solar eclipses of 1715, 1976, and 1979, the solar radius for 1715 is 0.34 + or - 0.2 arc second larger than the recent values, with no significant change between 1976 and 1979. The duration of totality is examined as a function of distance from the edges of the path. Corrections to the radius of the sun derived from observations of the 1976 and 1979 eclipses by the International Occultation Timing Association are also presented.

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