| 释义 |
bes·sel's day numbers
\ˈbesəlz-\ noun plural
or bessel's star numbers
Usage: usually capitalized B
Etymology: after F.W. Bessel
: four numbers, A, B, C, D, constant for all stars, whose logarithms are tabulated for different dates and used in calculating the apparent change in right ascension and declination for any date from any date |