Accession Number : AD0475774

Title :   OBSERVATIONS OF PLANETS AND QUASI-STELLAR RADIO SOURCES AT 3 MM.

Descriptive Note : Technical documentary rept.,

Corporate Author : AEROSPACE CORP EL SEGUNDO CA LAB OPERATIONS

Personal Author(s) : Epstein, E. E.

Report Date : SEP 1965

Pagination or Media Count : 42

Abstract : Depending upon the method used to derive the terrestrial atmospheric attenuation, Venus 3.3-mm brightness temperatures obtained on 55 days in 1964 indicate either (1) no phase effect and a mean brightness temperature of 292 K, (2) an inverse phase effect, or (3) no phase effect for two weeks in June above a mean temperature of 285 K. The estimated total systematic errors for the mean temperatures are +40, -30 K. There were not enough data for meaningful correlations with the 10.7-cm solar flux or sunspot index. The quasi-stellar radio source 3C 279 has been observed at lambda equals 3.4 mm with the 15-ft antenna of the Space Radio Systems Facility. The fact that the measured flux value is well above the centimeter flux may infer that a nonthermal emission mechanism is operating at 3.4 mm. The measured 3.4 mm flux from the quasi-stellar source 3C 273 in April and July 1965 are analyzed. The disk temperatures at 3.4 mm of Mercury and Mars were measured in April 1965. At that time Mercury was near inferior conjunction; the average illuminated fraction was 0.10 during the observations. The average disk temperatures of Mercury and Mars were 220 + or - 35 K and 190 + or - 40 K, respectively. The seven individual daily values of Mercury showed no evidence of a phase effect. (Author)

Descriptors :   *EXTRATERRESTRIAL RADIO WAVES), (*PLANETS, STARS, VENUS(PLANET), MARS(PLANET), MERCURY(PLANET), PLANETARY ATMOSPHERES, GALAXIES, ASTROPHYSICS, TEMPERATURE, MEASUREMENT, MICROWAVE FREQUENCY, ASTRONOMY, RADIO ASTRONOMY.

Subject Categories : Astronomy
      Astrophysics

Distribution Statement : APPROVED FOR PUBLIC RELEASE