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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of Astronomy and Space Sciences
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The Korean Space Science Society
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Volume & Issues
Volume 7, Issue 2 - Dec 1990
Volume 7, Issue 1 - Jun 1990
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A MECHANISM OF THE STRANGE ISOTOPIC FRACTIONATION OF OXYGEN FOUND IN METEORITE AND LABORATORY
Yang, J. ; Kim, S.K. ; Soh, K.S. ; Yee, J.H. ; Kim, S.W. ; Kim, K.H. ; Yoo, K.W. ;
Journal of Astronomy and Space Sciences, volume 7, issue 1, 1990, Pages 1~10
The thermodynamic distribution of the vibrational states of ozone coupled with anharmonic predissociation produces an unusual isotopomeric pattern of oxygen molecules. The model presented here explains the experimental data obtained from the electric discharge of oxygen gas to produce ozone condensed on a quartz at 77K.
MEAN ORBITAL ELEMENTS FOR GEOSYNCHRONOUS ORBIT -II -Orbital inclination, longitude of ascending node, mean longitude-
Journal of Astronomy and Space Sciences, volume 7, issue 1, 1990, Pages 11~21
The osculating orbital elements include the mean, secular, long period, and short period terms. The iterative algorithm used for conversion of osculating orbital elements to mean orbital elements is described. The mean orbital elements of
, and L are obtained.
RESONANCE EFFECT ON THE GEOSYNCHRONOUS ORBIT DUE TO THE NON-ZONAL GEOPOTENTIAL
Journal of Astronomy and Space Sciences, volume 7, issue 1, 1990, Pages 23~35
Resonance effect on the orbital elements of geosynchronous artificial satellite due to the non-zonal geopotential has been calculated. For the perturbation of a artificial satellite, perturbation effects due to the non-zonal geopotential is less than due to the
or Luni-Solar perturbation, but non-zonal harmonics resonance exist. So, we calculate the perturbation of geosynchronous artificial satellite orbit due to the non-zonal harmonics resonance. The effect on the orbit eccentricity of non-zonal harmonics resonance is represented by a phase plane plot of ec. The effect on the orbit eccentricity of non-zonal harmonics resonance is represented by a phase plane plot of
. The evolution of mean longitude and semi-major axis are obtained.
OPTIMAL ORBIT TRANSFER UNDER EARTH ZONAL POTENTIAL
Journal of Astronomy and Space Sciences, volume 7, issue 1, 1990, Pages 37~45
It was investigated that the effect of zonal harmonics to transfer orbit. Since parking orbit is located at low altitude, the zonal harmonics affects transfer orbit relatively high sense. So under the zonal harmonics, eccentricity and semi-major-axis which were related orbit altitude at the first hand, were investigated. As a result the zonal harmonics increases the altitude of apogee of transfer orbit. So if the zonal harmonics is considered in orbit transfer the fuel can be saved a little.
EXTREME LONG PERIOD ECLIPSING BINARY EPSILON AURIGAE -Spectroscopic Study-
Chun, Mun-Suk ; Park, Jang-Hyeon ; Jeong, Jang-Hae ;
Journal of Astronomy and Space Sciences, volume 7, issue 1, 1990, Pages 47~55
From the study of a spectroscopic plate of
Auriage, we can measure the radial velocity and the relative abundance for this eclipsing binary. Calculated radial velocity is -37Km/s and the abundance of [Fe] is estimated as -1.5.
ULTRAVIOLET FLUX VARIATION OF EPSILON AURIGAE
Kang, Young-Woon ;
Journal of Astronomy and Space Sciences, volume 7, issue 1, 1990, Pages 57~69
The eighteen ultraviolet light curves of Epsilon Aurigae have been plotted using the integrated fluxes reduced from the 233 IUE low dispersion spectra taken between 1978 and 1986. The times of contacts and depth of eclipse have been determined from the light curves at the wavelength from 2550
. The UV light curves show two brightenings during the totality, the downward slope of the variation from the second to the third contacts, and asymmetry of the eclipse light curve. The two selected spectra note that the energy density distribution is not changed between the totality of the eclipse and out-of-eclipse.