February 2004 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  12:48MR 17:16SS         18:58TE  5:24MS  5:48TS          7:31SR          0:24VT 
 2- 2  13:33MR 17:17SS         19: 0TE          5:46TS  6:16MS  7:30SR          0: 0VT 
 2- 3  14:26MR 17:19SS         19: 1TE          5:46TS  7: 1MS  7:28SR          0: 0VT 
 2- 4  15:33MR 17:21SS         19: 2TE          5:45TS          7:26SR  7:39MS  0: 0VT 
 2- 5  16:38MR 17:22SS         19: 4TE          5:43TS          7:25SR  8: 7MS  0: 0VT 
 2- 6          17:22SS 17:51MR 19: 6TE          5:41TS          7:24SR  8:33MS  0: 0VT 
 2- 7          17:25SS 19: 2MR 19: 7TE          5:40TS          7:22SR  8:53MS  0: 0VT 
 2- 8          17:25SS         19: 7TE 20:16MR  5:40TS          7:22SR  9:14MS  1: 8VT 
 2- 9          17:28SS         19:10TE 21:28MR  5:39TS          7:19SR  9:33MS  2:18VT 
 2-10          17:28SS         19:10TE 22:43MR  5:37TS          7:19SR  9:53MS  3:32VT 
 2-11          17:31SS         19:12TE 23:58MR  5:35TS          7:16SR 10:16MS  4:46VT 
 2-12          17:31SS         19:13TE  1:16MR  5:34TS          7:16SR 10:46MS  6: 3VT 
 2-13          17:34SS         19:15TE  2:37MR  5:33TS          7:13SR 11:22MS  7:22VT 
 2-14          17:34SS         19:16TE  3:54MR  5:31TS          7:13SR          8:37VT 
 2-15  12: 8MS 17:37SS         19:17TE  5: 4MR  5:30TS          7:10SR          9:46VT 
 2-16  13: 8MS 17:37SS         19:19TE          5:28TS  6: 0MR  7:10SR         10: 9VT 
 2-17  14:21MS 17:40SS         19:19TE          5:26TS  6:45MR  7: 7SR         10: 7VT 
 2-18  15:40MS 17:40SS         19:22TE          5:25TS          7: 5SR  7:18MR 10: 3VT 
 2-19  16:58MS 17:42SS         19:22TE          5:24TS          7: 4SR  7:45MR 10: 1VT 
 2-20          17:43SS 18:16MS 19:25TE          5:22TS          7: 3SR  8: 7MR  9:57VT 
 2-21          17:45SS         19:25TE 19:28MS  5:20TS          7: 1SR  8:26MR  9:52VT 
 2-22          17:46SS         19:27TE 20:38MS  5:19TS          7: 0SR  8:44MR  8:40VT 
 2-23          17:47SS         19:28TE 21:47MS  5:18TS          6:58SR  9: 2MR  7:30VT 
 2-24          17:49SS         19:30TE 22:55MS  5:16TS          6:55SR  9:21MR  6:20VT 
 2-25          17:51SS         19:31TE  0: 2MS  5:13TS          6:55SR  9:44MR  5:11VT 
 2-26          17:52SS         19:32TE  1: 7MS  5:13TS          6:52SR 10:10MR  4: 5VT 
 2-27          17:53SS         19:34TE  2:13MS  5:10TS          6:50SR 10:43MR  2:57VT 
 2-28          17:55SS         19:36TE  3:13MS  5: 9TS          6:49SR 11:23MR  1:55VT 
 2-29          17:57SS         19:37TE  4:10MS  5: 7TS          6:48SR          0:57VT 

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.