February 2010 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 21: 4MR  5:48TS          7:30SR  8:56MS  2: 4VT 
 2- 2          17:17SS         19: 1TE 22:22MR  5:46TS          7:28SR  9:19MS  3:21VT 
 2- 3          17:19SS         19: 1TE 23:38MR  5:45TS          7:28SR  9:47MS  4:37VT 
 2- 4          17:21SS         19: 4TE  0:52MR  5:43TS          7:25SR 10:16MS  5:47VT 
 2- 5          17:22SS         19: 4TE  2: 1MR  5:43TS          7:25SR 10:52MS  6:57VT 
 2- 6          17:23SS         19: 6TE  3: 7MR  5:41TS          7:24SR 11:34MS  8: 0VT 
 2- 7          17:25SS         19: 7TE  4: 4MR  5:40TS          7:22SR          8:56VT 
 2- 8  12:25MS 17:27SS         19: 8TE  4:52MR  5:39TS          7:20SR          9:44VT 
 2- 9  13:22MS 17:28SS         19:10TE  5:31MR  5:37TS          7:19SR         10:21VT 
 2-10  14:22MS 17:30SS         19:12TE          5:37TS  6: 4MR  7:18SR         10:24VT 
 2-11  15:26MS 17:31SS         19:13TE          5:34TS  6:31MR  7:16SR         10:21VT 
 2-12  16:31MS 17:32SS         19:13TE          5:34TS  6:54MR  7:15SR         10:20VT 
 2-13  17:34MS 17:34SS         19:16TE          5:31TS          7:13SR  7:13MR 10:15VT 
 2-14          17:36SS 18:37MS 19:16TE          5:31TS          7:11SR  7:33MR 10:14VT 
 2-15          17:37SS         19:17TE 19:40MS  5:30TS          7:10SR  7:50MR  9:49VT 
 2-16          17:38SS         19:19TE 20:43MS  5:28TS          7: 9SR  8:10MR  8:44VT 
 2-17          17:40SS         19:21TE 21:47MS  5:26TS          7: 7SR  8:30MR  7:39VT 
 2-18          17:42SS         19:22TE 22:55MS  5:25TS          7: 5SR  8:56MR  6:29VT 
 2-19          17:43SS         19:23TE  0: 4MS  5:22TS          7: 4SR  9:26MR  5:18VT 
 2-20          17:45SS         19:25TE  1:13MS  5:22TS          7: 1SR 10: 4MR  4: 8VT 
 2-21          17:46SS         19:27TE  2:19MS  5:19TS          7: 1SR 10:52MR  3: 0VT 
 2-22          17:47SS         19:28TE  3:22MS  5:19TS          6:58SR 11:52MR  1:57VT 
 2-23          17:49SS         19:28TE  4:16MS  5:16TS          6:56SR          1: 0VT 
 2-24  13: 4MR 17:49SS         19:31TE  4:58MS  5:15TS          6:55SR          0:16VT 
 2-25  14:23MR 17:52SS         19:31TE          5:13TS  5:34MS  6:54SR          0: 0VT 
 2-26  15:47MR 17:52SS         19:34TE          5:11TS  6: 4MS  6:52SR          0: 0VT 
 2-27  17:10MR 17:55SS         19:34TE          5:10TS  6:31MS  6:49SR          0: 0VT 
 2-28          17:55SS 18:32MR 19:36TE          5: 7TS          6:48SR  6:55MS  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.