Bessel's day numbers
plural noun
variants: or
Bessel's star numbers
Definition of Bessel's day numbers
: 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
Explore M-W
There's more!
Love words? You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.
Start your free trial today and get unlimited access to America's largest dictionary, with:
- More than 250,000 words that aren't in our free dictionary
- Expanded definitions, etymologies, and usage notes
- Advanced search features
- Ad free!
Origin and Etymology of bessel's day numbers
after F. W. Bessel
Seen and Heard
What made you want to look up Bessel's day numbers? Please tell us where you read or heard it (including the quote, if possible).
Writing? Check your grammar now!