Positioning errors and efficiency in fiber spectrographs Global dynamics of high area-to-mass ratios GEO space debris by means of the MEGNO indicatorĮarth’s orbital motion about the Sun, (α, δ) are the true right ascension and declination of the ob ject, Λ is the true solar longitude, ǫ is the obliquity of the ecliptic, and (∆α, ∆δ) are the change in apparent position in the sense apparent coordinate minus true coordinate (Lang 1986, and references therein). Sun respectively, ǫ is the obliquity of the Earth with respect to the ecliptic and λ⊙ (0) the initial ecliptic longitude of the Sun.
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