SELENODETIC MEASUREMENTS FROM THE ANNULAR ECLIPSE OF 23 NOVEMBER 1965.
Final scientific rept., 1 May-30 Nov 66,
LOCKHEED-CALIFORNIA CO BURBANK
Pagination or Media Count:
The 23 November 1965 Annular Solar Eclipse was observed by a Lockheed-USAF Expedition from a site near Chiengmai in Northern Thailand. Solar images approximately 6.5 inches in diameter were formed by a 12 inch aperture, f-57 concave mirror fed by a coelostat. Twenty photographs nearest the central phase of the eclipse were measured to determine the profile of the moon as presented against the circular solar disk. The data derived from these observations, after compensation for the various errors that could influence the results, compare reasonably well with Watts Atlas of the Marginal Zone of the Moon as to local irregularities. For the general shape, however, a discrepancy occurs. Watts finds a spherical datum satisfactory. The results of this eclipse confirm the results of the 1962 eclipse at essentially the same libration and indicate the existence of a general equatorial bulge. The two eclipses agree that the equatorial radius is of the order of 5km. greater than the polar radius. Author
- Celestial Mechanics