February 2011 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  16:15MS 17:16SS         18:58TE          5:48TS  7: 4MR  7:30SR         10:49VT 
 2- 2          17:17SS 17:21MS 19: 1TE          5:46TS          7:28SR  7:30MR 10:45VT 
 2- 3          17:19SS 18:25MS 19: 1TE          5:46TS          7:28SR  7:50MR 10:44VT 
 2- 4          17:21SS         19: 2TE 19:28MS  5:43TS          7:26SR  8:11MR 10:15VT 
 2- 5          17:22SS         19: 4TE 20:28MS  5:43TS          7:25SR  8:32MR  9:14VT 
 2- 6          17:23SS         19: 6TE 21:31MS  5:41TS          7:24SR  8:52MR  8:10VT 
 2- 7          17:25SS         19: 7TE 22:32MS  5:40TS          7:22SR  9:15MR  7: 8VT 
 2- 8          17:27SS         19: 8TE 23:34MS  5:40TS          7:20SR  9:40MR  6: 5VT 
 2- 9          17:28SS         19:10TE  0:38MS  5:37TS          7:19SR 10:10MR  5: 0VT 
 2-10          17:30SS         19:10TE  1:42MS  5:37TS          7:18SR 10:46MR  3:55VT 
 2-11          17:31SS         19:13TE  2:43MS  5:35TS          7:16SR 11:31MR  2:52VT 
 2-12          17:32SS         19:13TE  3:40MS  5:34TS          7:15SR          1:53VT 
 2-13  12:26MR 17:34SS         19:15TE  4:33MS  5:33TS          7:13SR          1: 0VT 
 2-14  13:33MR 17:36SS         19:16TE  5:16MS  5:31TS          7:11SR          0:14VT 
 2-15  14:46MR 17:37SS         19:17TE          5:30TS  5:55MS  7:10SR          0: 0VT 
 2-16  16: 4MR 17:38SS         19:19TE          5:28TS  6:26MS  7: 9SR          0: 0VT 
 2-17  17:25MR 17:40SS         19:21TE          5:26TS  6:55MS  7: 7SR          0: 0VT 
 2-18          17:40SS 18:46MR 19:22TE          5:25TS          7: 5SR  7:22MS  0: 0VT 
 2-19          17:43SS         19:23TE 20: 7MR  5:24TS          7: 4SR  7:49MS  0:43VT 
 2-20          17:43SS         19:25TE 21:27MR  5:22TS          7: 3SR  8:18MS  2: 1VT 
 2-21          17:46SS         19:25TE 22:46MR  5:20TS          7: 1SR  8:51MS  3:21VT 
 2-22          17:46SS         19:28TE  0: 4MR  5:19TS          6:58SR  9:27MS  4:35VT 
 2-23          17:49SS         19:28TE  1:16MR  5:16TS          6:58SR 10:11MS  5:47VT 
 2-24          17:49SS         19:30TE  2:19MR  5:16TS          6:55SR 11: 3MS  6:49VT 
 2-25          17:51SS         19:31TE  3:15MR  5:13TS          6:54SR          7:43VT 
 2-26  12: 1MS 17:52SS         19:32TE  4: 0MR  5:11TS          6:52SR          8:27VT 
 2-27  13: 3MS 17:53SS         19:34TE  4:37MR  5:10TS          6:50SR          9: 3VT 
 2-28  14: 7MS 17:55SS         19:36TE  5: 7MR  5: 9TS          6:49SR          9:31VT 

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.