Bessel's 1838 parallax of 61 Cygni

Digital scans of the pages of the original paper in "Astronomische Nachrichten" of 1838, in a much better readable form than given by NASA's ADS literature server. The files are only about a factor of two larger than the ADS files.

1st page
2nd page
3rd page
4th page
5th page
6th page
7th page
8th page
9th page
10th page
11th page
12th page
13th page
14th page
15th page
16th page

1st page, original scan in uncompressed form (7.7 MB; pnm format)