January 2005 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 22:51MR  6: 4TS          7:50SR 11:36MS  4:25VT 
 1- 2          16:38SS         18:25TE 23:58MR  6: 4TS          7:50SR 11:52MS  5:33VT 
 1- 3          16:40SS         18:25TE  1: 8MR  6: 4TS          7:49SR          6:43VT 
 1- 4  12:10MS 16:40SS         18:27TE  2:22MR  6: 4TS          7:49SR          7:55VT 
 1- 5  12:33MS 16:42SS         18:28TE  3:42MR  6: 4TS          7:49SR          9:13VT 
 1- 6  13: 1MS 16:43SS         18:28TE  5: 4MR  6: 4TS          7:49SR         10:35VT 
 1- 7  13:38MS 16:43SS         18:30TE          6: 3TS  6:25MR  7:49SR         11:33VT 
 1- 8  14:30MS 16:45SS         18:31TE          6: 3TS  7:37MR  7:49SR         11:31VT 
 1- 9  15:44MS 16:46SS         18:31TE          6: 3TS          7:49SR  8:36MR 11:31VT 
 1-10          16:46SS 16:58MS 18:32TE          6: 3TS          7:49SR  9:18MR 11:30VT 
 1-11          16:47SS 18:25MS 18:34TE          6: 1TS          7:48SR  9:51MR 11:27VT 
 1-12          16:49SS         18:34TE 19:51MS  6: 1TS          7:48SR 10:16MR 10:10VT 
 1-13          16:51SS         18:37TE 21:12MS  6: 1TS          7:46SR 10:36MR  8:49VT 
 1-14          16:52SS         18:37TE 22:28MS  6: 1TS          7:46SR 10:55MR  7:32VT 
 1-15          16:53SS         18:38TE 23:42MS  6: 1TS          7:46SR 11:13MR  6:18VT 
 1-16          16:55SS         18:40TE  0:53MS  6: 0TS          7:45SR 11:31MR  5: 7VT 
 1-17          16:55SS         18:40TE  2: 2MS  6: 0TS          7:45SR 11:52MR  3:57VT 
 1-18          16:57SS         18:42TE  3:12MS  5:58TS          7:43SR          2:46VT 
 1-19  12:19MR 16:58SS         18:43TE  4:19MS  5:58TS          7:43SR          1:39VT 
 1-20  12:49MR 17: 0SS         18:45TE  5:24MS  5:58TS          7:41SR          0:34VT 
 1-21  13:28MR 17: 1SS         18:46TE          5:56TS  6:20MS  7:40SR          0: 0VT 
 1-22  14:16MR 17: 2SS         18:46TE          5:56TS  7:10MS  7:40SR          0: 0VT 
 1-23  15:13MR 17: 4SS         18:47TE          5:55TS          7:40SR  7:49MS  0: 0VT 
 1-24  16:16MR 17: 6SS         18:49TE          5:55TS          7:39SR  8:19MS  0: 0VT 
 1-25          17: 7SS 17:22MR 18:51TE          5:54TS          7:37SR  8:45MS  0: 0VT 
 1-26          17: 8SS 18:30MR 18:52TE          5:52TS          7:37SR  9: 7MS  0: 0VT 
 1-27          17:10SS         18:52TE 19:37MR  5:52TS          7:35SR  9:25MS  0:44VT 
 1-28          17:10SS         18:55TE 20:43MR  5:50TS          7:34SR  9:41MS  1:47VT 
 1-29          17:13SS         18:55TE 21:49MR  5:49TS          7:33SR  9:57MS  2:53VT 
 1-30          17:13SS         18:57TE 22:58MR  5:49TS          7:31SR 10:16MS  4: 1VT 
 1-31          17:16SS         18:58TE  0: 9MR  5:48TS          7:31SR 10:34MS  5:10VT 

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.