Improved lunar eclipse ephemerides

Details Improved lunar eclipse ephemerides Improved lunar eclipse ephemerides

Dec 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jbaa..100..293s&link_type=abstract

Journal of the British Astronomical Association, vol.100, no.6, p.293-305

Astronomy and Astrophysics

Astronomy

1

Scientific paper

New values for two astronomical constants related to eclipses of the Moon for the enlargement of the umbra and the oblateness of the umbra are derived from the analysis of more than 7,000 observations of eighteen lunar eclipses during 1972 to 1989. A suite of micro-computer programs developed for this study has produced data from crater timings, which, when analysed, define the geometric characteristics of the umbra and the relationship with the oblateness of the Earth's atmosphere. These values form part of improved lunar eclipse ephemerides, from which revised primary contact times and lunar eclipse circumstances are predicted. These predictions are compared with observations of the four lunar eclipses of 1988 and 1989.

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