February 2003 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          17:16SS 17:36MS 18:58TE          5:48TS          7:30SR  8:41MR 10:49VT 
 2- 2          17:17SS 18:46MS 19: 1TE          5:46TS          7:28SR  9: 6MR 10:45VT 
 2- 3          17:19SS         19: 1TE 19:52MS  5:46TS          7:28SR  9:26MR  9:53VT 
 2- 4          17:21SS         19: 2TE 20:58MS  5:45TS          7:26SR  9:45MR  8:46VT 
 2- 5          17:22SS         19: 4TE 22: 1MS  5:43TS          7:25SR 10: 3MR  7:41VT 
 2- 6          17:23SS         19: 6TE 23: 4MS  5:41TS          7:24SR 10:22MR  6:37VT 
 2- 7          17:25SS         19: 7TE  0: 7MS  5:40TS          7:22SR 10:41MR  5:32VT 
 2- 8          17:27SS         19: 8TE  1:12MS  5:40TS          7:20SR 11: 4MR  4:28VT 
 2- 9          17:28SS         19:10TE  2:16MS  5:37TS          7:19SR 11:33MR  3:21VT 
 2-10          17:30SS         19:10TE  3:22MS  5:37TS          7:18SR          2:14VT 
 2-11  12: 7MR 17:31SS         19:13TE  4:25MS  5:35TS          7:16SR          1:10VT 
 2-12  12:52MR 17:32SS         19:13TE  5:24MS  5:34TS          7:15SR          0:10VT 
 2-13  13:48MR 17:34SS         19:15TE          5:33TS  6:15MS  7:13SR          0: 0VT 
 2-14  14:53MR 17:36SS         19:16TE          5:31TS  6:56MS  7:11SR          0: 0VT 
 2-15  16: 7MR 17:37SS         19:17TE          5:30TS          7:10SR  7:31MS  0: 0VT 
 2-16  17:25MR 17:37SS         19:19TE          5:28TS          7: 9SR  8: 2MS  0: 0VT 
 2-17          17:40SS 18:46MR 19:21TE          5:26TS          7: 7SR  8:26MS  0: 0VT 
 2-18          17:40SS         19:22TE 20: 4MR  5:25TS          7: 5SR  8:49MS  0:42VT 
 2-19          17:43SS         19:22TE 21:23MR  5:24TS          7: 4SR  9:12MS  2: 1VT 
 2-20          17:43SS         19:25TE 22:42MR  5:22TS          7: 3SR  9:37MS  3:16VT 
 2-21          17:46SS         19:25TE  0: 1MR  5:20TS          7: 1SR 10: 4MS  4:35VT 
 2-22          17:46SS         19:28TE  1:19MR  5:19TS          6:58SR 10:37MS  5:51VT 
 2-23          17:47SS         19:28TE  2:34MR  5:16TS          6:58SR 11:18MS  7: 6VT 
 2-24          17:49SS         19:30TE  3:45MR  5:16TS          6:55SR          8:15VT 
 2-25  12: 7MS 17:51SS         19:31TE  4:45MR  5:13TS          6:54SR          9:13VT 
 2-26  13: 6MS 17:52SS         19:32TE          5:11TS  5:34MR  6:52SR          9:39VT 
 2-27  14:11MS 17:53SS         19:34TE          5:10TS  6:13MR  6:50SR          9:36VT 
 2-28  15:21MS 17:55SS         19:36TE          5: 9TS  6:43MR  6:49SR          9:32VT 

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.