Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975p%26ss...23..173r&link_type=abstract
(COSPAR, Plenary Meeting, 16th, Konstanz, West Germany, May 23-June 5, 1973.) Planetary and Space Science, vol. 23, Jan. 1975, p
Astronomy and Astrophysics
Astronomy
3
Earth-Moon System, Gegenschein, Lagrangian Equilibrium Points, Librational Motion, Satellite Observation, Zodiacal Light, Astronomical Photometry, Calibrating, Cloud Photography, Orbit Perturbation, Oso-6
Scientific paper
Results from the OSO-6 Rutgers Zodiacal Light Analyzer experiment show photometric perturbations above the background in the antisun line of sight. Sixteen successive lunations were examined, and the accumulated perturbations show a maximum value in the direction of the L4 and L5 earth-moon libration points. This is interpreted as a counterglow from a cloud of particles at the libration points. The average brightness of these libration clouds is 20 S10 Vis. The average angular size of the libration clouds is approximately 6 degrees. Their position varies from one lunation to the next, within an ellipsoidal zone centered on the libration-point direction, with its semimajor axis, of approximately 6 degrees, nominally in the ecliptic and its semiminor axis, of approximately 2 degrees perpendicular to the ecliptic. The position of these clouds with respect to the Lagrangian L4 and L5 points is towards the moon in the northern summer and away from the moon in the northern winter.
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