February 2009 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         19: 0TE  0:46MS  5:46TS          7:30SR 10:19MR  5: 0VT 
 2- 2          17:19SS         19: 1TE  2: 2MS  5:46TS          7:28SR 10:55MR  3:43VT 
 2- 3          17:19SS         19: 2TE  3:19MS  5:45TS          7:26SR 11:41MR  2:25VT 
 2- 4          17:22SS         19: 4TE  4:28MS  5:43TS          7:25SR          1:15VT 
 2- 5  12:41MR 17:22SS         19: 4TE  5:28MS  5:43TS          7:25SR          0:15VT 
 2- 6  13:55MR 17:25SS         19: 7TE          5:41TS  6:15MS  7:22SR          0: 0VT 
 2- 7  15:19MR 17:25SS         19: 7TE          5:40TS  6:50MS  7:22SR          0: 0VT 
 2- 8  16:42MR 17:28SS         19: 8TE          5:39TS          7:19SR  7:19MS  0: 0VT 
 2- 9          17:28SS 18: 4MR 19:10TE          5:37TS          7:19SR  7:43MS  0: 0VT 
 2-10          17:31SS         19:12TE 19:22MR  5:35TS          7:18SR  8: 3MS  0:10VT 
 2-11          17:31SS         19:13TE 20:38MR  5:34TS          7:16SR  8:23MS  1:25VT 
 2-12          17:32SS         19:15TE 21:52MR  5:34TS          7:15SR  8:45MS  2:37VT 
 2-13          17:34SS         19:16TE 23: 4MR  5:31TS          7:13SR  9: 7MS  3:47VT 
 2-14          17:36SS         19:16TE  0:13MR  5:31TS          7:11SR  9:33MS  4:57VT 
 2-15          17:37SS         19:19TE  1:22MR  5:28TS          7:10SR 10: 4MS  6: 2VT 
 2-16          17:38SS         19:19TE  2:25MR  5:28TS          7: 7SR 10:43MS  7: 6VT 
 2-17          17:40SS         19:22TE  3:24MR  5:25TS          7: 7SR 11:28MS  8: 1VT 
 2-18          17:42SS         19:22TE  4:13MR  5:25TS          7: 4SR          8:51VT 
 2-19  12:22MS 17:43SS         19:23TE  4:55MR  5:22TS          7: 4SR          9:31VT 
 2-20  13:23MS 17:45SS         19:25TE          5:20TS  5:28MR  7: 1SR          9:55VT 
 2-21  14:30MS 17:46SS         19:27TE          5:19TS  5:56MR  7: 0SR          9:52VT 
 2-22  15:37MS 17:47SS         19:28TE          5:18TS  6:19MR  6:58SR          9:49VT 
 2-23  16:43MS 17:49SS         19:30TE          5:16TS  6:40MR  6:56SR          9:46VT 
 2-24          17:51SS 17:52MS 19:31TE          5:15TS          6:55SR  6:58MR  9:43VT 
 2-25          17:52SS 19: 1MS 19:31TE          5:13TS          6:52SR  7:18MR  9:41VT 
 2-26          17:53SS         19:34TE 20:10MS  5:10TS          6:52SR  7:37MR  9: 0VT 
 2-27          17:55SS         19:34TE 21:22MS  5:10TS          6:49SR  7:58MR  7:47VT 
 2-28          17:55SS         19:37TE 22:36MS  5: 7TS          6:48SR  8:23MR  6:31VT 

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.