SC001: p. 6

Click practice

If you click on a location in the below star map, I'll tell you the RA and dec of that location! Once you get your answers be sure to click the back key!

Notice that fractions of hours are reported in terms of (^m or minutes). Naturally 60^m=1^h, so 6^h30^m is the same as 6½^h. Traditionally in astronomy degrees of declination are further subdivided into arc-minutes (denoted ', with 60'=1°); and arc-minutes are further subdivided into arc-seconds (denoted ", with 60"=1').