February 2007 Dark Sky Observing Time

The dark sky table shows the Pacific Standard Time (PST) times for sunset, astronomical twilight ends, astronomical twilight starts, sunrise, moonrise, moonset and total moon-free, twilight-free viewing time for Portland, Oregon, U.S.A. (Longitude: West 122.68 degrees & Latitude: North 45.52 degrees). Moon-free, twilight-free viewing time is the best time to observer deep sky objects because the moon light and twilight will not interfere with observing these faint objects.

Format:  ##:##SS = Sunset     ##:##TE = Twilight Ends    ##:##MR = Moonrise             
         ##:##SR = Sun Rise   ##:##TS = Twilight Starts  ##:##MS = Moonset
         ##:##VT = Moon-free, Twilight-free Viewing Time                  

Date            Sunset        Twilight Ends    Twilight Starts  Sun Rise  Viewing Time

 2- 1  16:49MR 17:16SS         18:58TE          5:48TS          7:30SR  8: 2MS  0: 0VT 
 2- 2          17:17SS 18: 0MR 19: 1TE          5:46TS          7:28SR  8:22MS  0: 0VT 
 2- 3          17:19SS         19: 1TE 19: 7MR  5:46TS          7:28SR  8:38MS  0: 5VT 
 2- 4          17:21SS         19: 2TE 20:13MR  5:45TS          7:26SR  8:53MS  1:10VT 
 2- 5          17:22SS         19: 4TE 21:17MR  5:43TS          7:25SR  9: 8MS  2:13VT 
 2- 6          17:23SS         19: 6TE 22:22MR  5:41TS          7:24SR  9:25MS  3:16VT 
 2- 7          17:25SS         19: 7TE 23:27MR  5:40TS          7:22SR  9:41MS  4:19VT 
 2- 8          17:27SS         19: 8TE  0:33MR  5:40TS          7:20SR 10: 3MS  5:24VT 
 2- 9          17:28SS         19:10TE  1:40MR  5:37TS          7:19SR 10:28MS  6:30VT 
 2-10          17:30SS         19:10TE  2:49MR  5:37TS          7:18SR 11: 1MS  7:39VT 
 2-11          17:31SS         19:13TE  3:55MR  5:35TS          7:16SR 11:46MS  8:42VT 
 2-12          17:32SS         19:13TE  4:55MR  5:34TS          7:15SR          9:42VT 
 2-13  12:45MS 17:34SS         19:15TE          5:33TS  5:46MR  7:13SR         10:18VT 
 2-14  13:55MS 17:36SS         19:16TE          5:31TS  6:26MR  7:11SR         10:14VT 
 2-15  15:15MS 17:37SS         19:17TE          5:30TS  6:58MR  7:10SR         10:12VT 
 2-16  16:37MS 17:38SS         19:19TE          5:28TS          7: 9SR  7:22MR 10: 8VT 
 2-17          17:40SS 18: 1MS 19:21TE          5:26TS          7: 7SR  7:45MR 10: 5VT 
 2-18          17:40SS         19:22TE 19:23MS  5:25TS          7: 5SR  8: 4MR 10: 1VT 
 2-19          17:43SS         19:23TE 20:46MS  5:24TS          7: 4SR  8:25MR  8:37VT 
 2-20          17:43SS         19:25TE 22: 7MS  5:22TS          7: 3SR  8:45MR  7:14VT 
 2-21          17:46SS         19:25TE 23:31MS  5:20TS          7: 1SR  9:11MR  5:49VT 
 2-22          17:46SS         19:28TE  0:53MS  5:19TS          6:58SR  9:42MR  4:26VT 
 2-23          17:49SS         19:28TE  2:12MS  5:16TS          6:58SR 10:22MR  3: 4VT 
 2-24          17:49SS         19:30TE  3:22MS  5:16TS          6:55SR 11:13MR  1:53VT 
 2-25          17:51SS         19:31TE  4:20MS  5:13TS          6:54SR          0:52VT 
 2-26  12:16MR 17:52SS         19:32TE  5: 5MS  5:11TS          6:52SR          0: 5VT 
 2-27  13:25MR 17:53SS         19:34TE          5:10TS  5:40MS  6:50SR          0: 0VT 
 2-28  14:36MR 17:55SS         19:36TE          5: 9TS  6: 7MS  6:49SR          0: 0VT 

This Dark Sky table may print better in landscape orientation. Also, when printing using Netscape check the Black Text option in the File menu, Page Setup... menu in order to print the white text. This Dark Sky table was created by Dave Heider's Dark Sky DOS program. Download the Dark Sky DOS program to create your own unique Dark Sky tables for your location and time of observing.