Mystery Class

Sunrise/Sunset Data

For Monday, February 12, 2007

(These sunrise/sunset times were recorded by the Mystery sites on Monday,
the same day you collected your own local sunrise/sunset data.)
MYSTERY CLASS
SUNRISE SUNSET
#1
07:25
17:26
#2
07:08 
18:19
#3
23:22 **
22:41 **
#4
07:12 
17:46 
#5
05:42 
18:17 
#6
06:33 
18:06 
#7
06:52 
19:49 
#8
07:22 
17:52
#9
06:25 
18:32 
#10
06:57
20:24 

* MC #3's times look unusual, but they are CORRECT. On Feb 12, the sun set at 22:41 pm, and then rose at 23:22 pm. There are several ways to calculate photoperiod for this unique day:

One way is to calculate how much daylight there was (a) from 00:00 to 22:41 ; and (b) from 23:22 to 24:00; then add the two amounts.

Another way is to calculate how much darkness there was from 22:41 to 23:22; then subtract that amount from 24 hours.

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