英语词汇“bessel fictitious year”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	bessel fictitious year
释义	Bessel fictitious year fictitious year The period between successive returns of the sun to a sidereal hour angle of 80° (about January 1). The length of the fictitious year is the same as that of the tropical year, because both are based upon the position of the sun with respect to the vernal equinox. Also called a Besselian year or a Bessel fictitious year.
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Bessel fictitious year