Jim Gilbert Home Page Challenge Questions Today's News Spring's Journey North Report Your Sightings Teacher's Manual Search Journey North return to: A/CPB

Example # 1 Back to Mystery Class Worksheet Back to Equinox Sunrise Table Back to Today's Report Step # 1 Mystery Class #3's sunrise time is given as 18:56 (GMT) on March 19. This means it was afternoon in Greenwich when the sun rose at this site. BOX A 18:56 PM (3/19) Step # 2 Sunrise time at Greenwich was 6:03 A.M. BOX B 6:03 A.M. Step # 3 The number of hours and minutes between A and B is 11 hours and 07 minutes BOX C 11 hrs 07 min Step # 4 Convert the amount of time in Box C into minutes by multiplying the hours by 60 and adding the remaining minutes (11 x 60=660 + 07= 667 minutes) BOX D 667 minutes Step # 5 Figure out the degrees away from Greenwich by dividing the minutes in Box D by 4 (667 divided by 4 = 166.75 degrees) BOX E 166.75 Step # 6 Eastern or Western Hemisphere? To determine the site's longitude you need to know if it is in the Eastern or Western Hemisphere (i.e East or West of Greenwich, which is 0 degrees). Here, 18:56 on 3/19 was earlier than 6:03 A.M. on 3/20. This means the site is east of Greenwich, in the Eastern Hemisphere. BOX F 166.75 E