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The mass, gravity field, and ephemeris of Mercury
This paper represents a final report on the gravity analysis of radio Doppler and range data generated by the Deep Space Network (DSN) with Mariner 10 during two of its encounters with Mercury in… Expand
Rotational Period of the Planet Mercury
- G. Colombo
- 6 November 1965
IN a recent communication by S. J. Peale and T. Gold1 the rotational period of Mercury, determined from radar Doppler-spread measurements to be 59 ± 5 days2, has been explained in terms of a solar… Expand
Cassini's second and third laws.
- G. Colombo
In 1693 G. D. Cassini published the three following empirical laws on the Moon’s rotational motion: (1) The Moon rotates uniformly about its polar axis with a rotational period equal to the… Expand
Theory of motion of Saturn's coorbiting satellites
Abstract A simple analytic theory describing the 1:1 orbital resonance is presented and applied to Saturn's coorbiting pair, 1980S1 and 1980S3. These satellites are very small and can approach to… Expand
The Rotation of the Planet Mercury
Mercury rotational period as consequence of solar torques and equatorial asymmetry, based on radar data and model developing superharmonic resonance
Secular resonance, solar spin down, and the orbit of Mercury
Abstract A mechanism capable of accounting for the large mean eccentricity (0.175) and inclination (7°.2) of Mercury is discussed. Provided the gravitational field of the rapidly rotating primordial… Expand
On the formation of the outer satellite groups of Jupiter
Abstract This paper presents evidence suggesting that Jupiter's seven outer satellites, which exist in two distinct groups, were formed by a single collision of an asteroid and a larger satellite.
The geometric oblateness of Uranus
The paper considers photographs of Uranus obtained by the Stratoscope II balloon-borne telescope in 1970. These data have been redigitized and reanalyzed, and the geometric oblateness of Uranus was… Expand
The «Skyhook»: A shuttle-borne tool for low-orbital-altitude research
SommarioSatelliti collegati con cavo allo Shuttle in orbita contribuiscono in modo significativo alla versatilità del veicolo. Se lo Shuttle è in orbita a 200 km di altezza, l'uso di un cavetto lungo… Expand