scholarly journals Photographic and photoelectric technique for mapping the marginal zone of the moon.

1950 ◽  
Vol 55 ◽  
pp. 81 ◽  
Author(s):  
C. B. Watts ◽  
A. N. Adams
Keyword(s):  
Marginal Zone ◽  
The Moon ◽  
Photoelectric Technique

A Study of the Figure of the Moon from Photographs of the Full Moon

1962 ◽  
Vol 14 ◽  
pp. 63-66
Author(s):  
H. I. Potter
Keyword(s):  
Marginal Zone ◽  
Full Moon ◽  
The Other ◽  
The Moon ◽  
Origin And Evolution ◽  
Other Hand ◽  
Exact Figure

A study of the general figure of the Moon is of great importance for the solution of many problems. First of all, in astrometric observations of the Moon the position of its centre is determined by reference to its limb; and thus in order to compare the observed coordinates of the Moon with ephemerides it is necessary to adopt a definite hypothesis about the form of the limb. On the other hand, when compiling maps of the marginal zone of the Moon it is necessary to refer the heights of individual points to the barycentric sphere, common for all sections of the limb and all phases of libration. And, thirdly, studies of the rotation of the Moon and of its physical librations are also connected with the measurement of points on the limb and require the knowledge of its general form. Finally, a knowledge of the exact figure of the Moon is highly important for the theory of the origin and evolution of our satellite.

The U.S. Naval Observatory Survey of the Marginal Zone of the Moon

1962 ◽  
Vol 14 ◽  
pp. 59-61 ◽  
Author(s):  
C. B. Watts
Keyword(s):  
Marginal Zone ◽  
Position Angle ◽  
The Moon ◽  
Photoelectric Device ◽  
Naval Observatory ◽  
The U.S

In a survey of the marginal zone now approaching completion at the U.S. Naval Observatory about 700 photographs of the Moon, made on 503 nights, have been utilized. These photographs, made at the Naval Observatory, the Yale-Columbia Southern Station at Johannesburg, and the Lowell Observatory, were measured by an automatic photoelectric device. The measures were recorded graphically in the form of profiles, which are on a scale of 41 mm per degree in position angle and 16 mm per second of arc in radius.

A digitised version of C. B. Watts' charts of the marginal zone of the moon

The Moon ◽  
1971 ◽  
Vol 2 (4) ◽  
pp. 463-467 ◽  
Author(s):  
L. V. Morrison ◽  
R. J. Martin
Keyword(s):  
Marginal Zone ◽  
The Moon

scholarly journals Problem of Using Lunar Positional Observations for Determination of Zero-Points of Fundamental Star Catalogues

1990 ◽  
Vol 141 ◽  
pp. 93-93
Author(s):  
V. A. Fomin
Keyword(s):  
Marginal Zone ◽  
Precise Determination ◽  
The Moon ◽  
Star Catalogue ◽  
Secular Variations ◽  
Image Position ◽  
The Right ◽  
Right Ascension ◽  
Zero Points

The long series of meridian observations of the Moon can be used for the precise determination of the equinox- and equator-corrections of a star catalogue. Systematic errors of different charts of the lunar marginal zone used for the reduction of the lunar limb observations have no influence on the determination of the secular variations of the zero-points of the fundamental coordinate system.From meridian observations of the lunar limb made during the interval 1923-1977 in Washington, Greenwich, Cape and Tokyo the following estimate is found for the correction to the right ascension system of the FK4 catalogue: which is in disagreement with the values used for the compilation of the FK5 catalogue.

The motion of a lunar orbiter

1966 ◽  
Vol 25 ◽  
pp. 373
Author(s):  
Y. Kozai
Keyword(s):  
Degrees Of Freedom ◽  
Dimensional Space ◽  
Artificial Satellite ◽  
Equations Of Motion ◽  
Triaxial Ellipsoid ◽  
The Moon ◽  
Secular Motion ◽  
The Earth ◽  
Close Satellite ◽  
The Mean

The motion of an artificial satellite around the Moon is much more complicated than that around the Earth, since the shape of the Moon is a triaxial ellipsoid and the effect of the Earth on the motion is very important even for a very close satellite.The differential equations of motion of the satellite are written in canonical form of three degrees of freedom with time depending Hamiltonian. By eliminating short-periodic terms depending on the mean longitude of the satellite and by assuming that the Earth is moving on the lunar equator, however, the equations are reduced to those of two degrees of freedom with an energy integral.Since the mean motion of the Earth around the Moon is more rapid than the secular motion of the argument of pericentre of the satellite by a factor of one order, the terms depending on the longitude of the Earth can be eliminated, and the degree of freedom is reduced to one.Then the motion can be discussed by drawing equi-energy curves in two-dimensional space. According to these figures satellites with high inclination have large possibilities of falling down to the lunar surface even if the initial eccentricities are very small.The principal properties of the motion are not changed even if plausible values ofJ3andJ4of the Moon are included.This paper has been published in Publ. astr. Soc.Japan15, 301, 1963.

Laboratory Simulation of Lunar Luminescence

1962 ◽  
Vol 14 ◽  
pp. 441-444 ◽  
Author(s):  
J. E. Geake ◽  
H. Lipson ◽  
M. D. Lumb
Keyword(s):  
Science And Technology ◽  
Laboratory Simulation ◽  
The Moon ◽  
Physics Department ◽  
Luminescent Spectrum

Work has recently begun in the Physics Department of the Manchester College of Science and Technology on an attempt to simulate lunar luminescence in the laboratory. This programme is running parallel with that of our colleagues in the Manchester University Astronomy Department, who are making observations of the luminescent spectrum of the Moon itself. Our instruments are as yet only partly completed, but we will describe briefly what they are to consist of, in the hope that we may benefit from the comments of others in the same field, and arrange to co-ordinate our work with theirs.

Formation of Lunar Craters and Bright Rays as a Result of Meteorite Impacts

1962 ◽  
Vol 14 ◽  
pp. 415-418
Author(s):  
K. P. Stanyukovich ◽  
V. A. Bronshten
Keyword(s):  
Explosive Charge ◽  
The Moon ◽  
Meteorite Impacts ◽  
The Earth ◽  
Lunar Craters ◽  
The Impact

The phenomena accompanying the impact of large meteorites on the surface of the Moon or of the Earth can be examined on the basis of the theory of explosive phenomena if we assume that, instead of an exploding meteorite moving inside the rock, we have an explosive charge (equivalent in energy), situated at a certain distance under the surface.

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