| 1. | When using Besselian years, specify which definition is being used.
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| 2. | Before 1984 Besselian equinoxes and epochs were used.
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| 3. | Lieske says that a " Besselian epoch " can be calculated from the Julian date according to
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| 4. | A Besselian year is named after the German mathematician and astronomer Friedrich Bessel ( 1784 1846 ).
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| 5. | Besselian years, used mostly for star positions, can be encountered in older catalogs but are now becoming obsolete.
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| 6. | Since 1984, Besselian equinoxes and epochs have been superseded by J2000.0, which is a Julian epoch.
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| 7. | Historically used Besselian equinoxes include B1875.0, B1900.0, B1925.0 and B1950.0.
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| 8. | In 1824, Bessel developed a new method for calculation the circumstances of eclipses using the so-called Besselian elements.
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| 9. | To distinguish between calendar years and Besselian years, it became customary to add " . 0 " to the Besselian years.
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| 10. | To distinguish between calendar years and Besselian years, it became customary to add " . 0 " to the Besselian years.
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