Right Ascension =
Declination =
from coordinate year =
to year =

Precessed Right Ascension =
Declination =

Notes:

Precession depends on the coordinate year and the desired target date. Proper motion is ignored.

Right Ascension hours can be entered in a variety of formats. For example, '05h 12m 20.2sec', or '5 12 20.2' or '5:12:20.2' or simply ,'5' for 5 hrs. Decimals can be used anywhere, e.g., '5.5h' is 5h 30m. Any reasonable spelling or shorthand of hours, minutes and seconds can be used. Radians can also be used, e.g., 1.2 radians or 1.2rad or 1.2r.

Declination degrees can be entered in a variety of formats. For example, '+41°16'10.0"' or '41d 16m 10s' or '41 16 10' or '41:16:10' or simply '4' for 4 degrees. Decimals can be used anywhere, e.g., '5.5' is 5d 30m. Any reasonable spelling or shorthand of degrees, minutes and seconds can be used. Radians can also be used, e.g., 1.2 radians or 1.2rad or 1.2r.

Mel Bartels