January 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

 1- 1          16:37SS         18:25TE 22:10MS  6: 4TS          7:50SR 10:46MR  7:53VT 
 1- 2          16:38SS         18:25TE 23:19MS  6: 4TS          7:50SR 11: 4MR  6:44VT 
 1- 3          16:40SS         18:25TE  0:30MS  6: 4TS          7:49SR 11:25MR  5:34VT 
 1- 4          16:40SS         18:27TE  1:43MS  6: 4TS          7:49SR 11:49MR  4:20VT 
 1- 5          16:42SS         18:28TE  3: 1MS  6: 4TS          7:49SR          3: 3VT 
 1- 6  12:19MR 16:43SS         18:28TE  4:20MS  6: 4TS          7:49SR          1:43VT 
 1- 7  13: 1MR 16:43SS         18:30TE  5:39MS  6: 3TS          7:49SR          0:24VT 
 1- 8  13:55MR 16:45SS         18:31TE          6: 3TS  6:46MS  7:49SR          0: 0VT 
 1- 9  15: 4MR 16:46SS         18:31TE          6: 3TS  7:41MS  7:49SR          0: 0VT 
 1-10  16:25MR 16:46SS         18:32TE          6: 3TS          7:49SR  8:23MS  0: 0VT 
 1-11          16:49SS 17:51MR 18:34TE          6: 1TS          7:48SR  8:56MS  0: 0VT 
 1-12          16:49SS         18:34TE 19:15MR  6: 1TS          7:48SR  9:21MS  0:40VT 
 1-13          16:51SS         18:37TE 20:34MR  6: 1TS          7:46SR  9:42MS  1:57VT 
 1-14          16:52SS         18:37TE 21:49MR  6: 1TS          7:46SR 10: 1MS  3:12VT 
 1-15          16:53SS         18:38TE 23: 1MR  6: 1TS          7:46SR 10:22MS  4:22VT 
 1-16          16:55SS         18:40TE  0:13MR  6: 0TS          7:45SR 10:43MS  5:32VT 
 1-17          16:55SS         18:40TE  1:22MR  6: 0TS          7:45SR 11: 6MS  6:41VT 
 1-18          16:58SS         18:42TE  2:30MR  5:58TS          7:43SR 11:33MS  7:47VT 
 1-19          16:58SS         18:43TE  3:34MR  5:58TS          7:43SR          8:51VT 
 1-20  12: 6MS 17: 0SS         18:45TE  4:37MR  5:58TS          7:41SR          9:52VT 
 1-21  12:46MS 17: 1SS         18:46TE  5:31MR  5:56TS          7:40SR         10:45VT 
 1-22  13:36MS 17: 2SS         18:46TE          5:56TS  6:18MR  7:40SR         11:10VT 
 1-23  14:33MS 17: 4SS         18:47TE          5:55TS  6:56MR  7:40SR         11: 7VT 
 1-24  15:37MS 17: 6SS         18:49TE          5:55TS  7:28MR  7:39SR         11: 5VT 
 1-25  16:42MS 17: 7SS         18:51TE          5:54TS          7:37SR  7:54MR 11: 2VT 
 1-26          17: 8SS 17:49MS 18:52TE          5:52TS          7:37SR  8:15MR 11: 0VT 
 1-27          17:10SS         18:53TE 18:55MS  5:52TS          7:35SR  8:34MR 10:56VT 
 1-28          17:12SS         18:55TE 20: 2MS  5:50TS          7:34SR  8:52MR  9:48VT 
 1-29          17:13SS         18:55TE 21:10MS  5:49TS          7:33SR  9:11MR  8:39VT 
 1-30          17:13SS         18:57TE 22:19MS  5:49TS          7:31SR  9:30MR  7:29VT 
 1-31          17:16SS         18:58TE 23:31MS  5:48TS          7:31SR  9:52MR  6:16VT 

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.