Keywords
Astrometry
Correction
Equators
Equinoxes
Errors
Asteroids
Declination
Indexes (Documentation)
Secular Variations
Solar Orbits
Subjects
Astronomy
Fundamental Systems: Equinox Correction
Fundamental Systems: FK5
Fundamental Systems: Minor Planets
Correction
Equators
Equinoxes
Errors
Asteroids
Declination
Indexes (Documentation)
Secular Variations
Solar Orbits
Subjects
Astronomy
Fundamental Systems: Equinox Correction
Fundamental Systems: FK5
Fundamental Systems: Minor Planets
How to Cite
Are There Significant Equator and Equinox Errors in the FK5 System?. (1998). Revista Mexicana De Astronomía Y Astrofísica, 34(1), 3-8. https://astronomia.unam.mx/journals/rmxaa/article/view/1998rmxaa..34....3b
Abstract
11739 observations in right ascension and 11656 in declination, made between 1847 and 1993, of 21 minor planets are used to estimate the equinox and equator errors of the FK5 fundamental system. Each minor planet's orbit was corrected along with corrections for the Earth's orbit and the FK5 equator, and equinox errors with their secular variations. No strong evidence exists for an equator correction or secular variation. Evidence does exist, however, for an equinox correction of the order of 0.18'' at the approximate epoch 1970 and for a possible motion of the equinox of about 0.11''-0.14'' per century. External evidence confirms at least part of these conclusions.Similar Articles
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