August 2004 Dark Sky Observing Time

The dark sky table shows the Pacific Daylight Saving Time (PDT) 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

 8- 1          20:37SS 21:49MR 22:38TE          3:54TS          5:55SR  8: 7MS  0: 0VT 
 8- 2          20:36SS 22:13MR 22:37TE          3:55TS          5:56SR  9:25MS  0: 0VT 
 8- 3          20:34SS 22:31MR 22:34TE          3:58TS          5:58SR 10:37MS  0: 0VT 
 8- 4          20:32SS         22:32TE 22:51MR  4: 0TS          5:58SR 11:49MS  0:18VT 
 8- 5          20:31SS         22:31TE 23: 8MR  4: 1TS          6: 1SR          0:37VT 
 8- 6  12:58MS 20:31SS         22:28TE 23:28MR  4: 4TS          6: 1SR          0:59VT 
 8- 7  14: 7MS 20:28SS         22:27TE 23:49MR  4: 4TS          6: 3SR          1:22VT 
 8- 8  15:13MS 20:28SS         22:25TE  0:16MR  4: 7TS          6: 4SR          1:50VT 
 8- 9  16:19MS 20:25SS         22:22TE  0:48MR  4: 9TS          6: 4SR          2:25VT 
 8-10  17:22MS 20:25SS         22:19TE  1:28MR  4:10TS          6: 7SR          3: 8VT 
 8-11  18:17MS 20:22SS         22:17TE  2:17MR  4:13TS          6: 7SR          4: 0VT 
 8-12  19: 4MS 20:22SS         22:16TE  3:15MR  4:13TS          6: 9SR          4:58VT 
 8-13  19:43MS 20:19SS         22:13TE          4:16TS  4:19MR  6:10SR          6: 2VT 
 8-14  20:16MS 20:17SS         22:12TE          4:18TS  5:28MR  6:10SR          6: 5VT 
 8-15          20:16SS 20:40MS 22:10TE          4:19TS          6:13SR  6:37MR  6: 9VT 
 8-16          20:15SS 21: 2MS 22: 7TE          4:20TS          6:13SR  7:48MR  6:13VT 
 8-17          20:13SS 21:22MS 22: 6TE          4:22TS          6:15SR  8:56MR  6:16VT 
 8-18          20:12SS 21:40MS 22: 2TE          4:25TS          6:16SR 10: 7MR  6:22VT 
 8-19          20:10SS 21:58MS 22: 1TE          4:25TS          6:18SR 11:19MR  6:24VT 
 8-20          20: 7SS         21:58TE 22:16MS  4:28TS          6:19SR          6:11VT 
 8-21  12:34MR 20: 7SS         21:57TE 22:40MS  4:30TS          6:19SR          5:49VT 
 8-22  13:52MR 20: 4SS         21:55TE 23: 7MS  4:31TS          6:20SR          5:23VT 
 8-23  15:13MR 20: 2SS         21:52TE 23:45MS  4:33TS          6:22SR          4:48VT 
 8-24  16:25MR 20: 1SS         21:49TE  0:35MS  4:34TS          6:24SR          3:59VT 
 8-25  17:37MR 20: 0SS         21:47TE  1:37MS  4:35TS          6:25SR          2:58VT 
 8-26  18:32MR 19:58SS         21:46TE  2:55MS  4:37TS          6:25SR          1:42VT 
 8-27  19:16MR 19:55SS         21:43TE  4:16MS  4:40TS          6:26SR          0:23VT 
 8-28  19:47MR 19:53SS         21:42TE          4:40TS  5:39MS  6:28SR          0: 0VT 
 8-29          19:52SS 20:13MR 21:38TE          4:43TS          6:30SR  6:58MS  0: 0VT 
 8-30          19:51SS 20:34MR 21:37TE          4:43TS          6:31SR  8:15MS  0: 0VT 
 8-31          19:49SS 20:52MR 21:34TE          4:46TS          6:31SR  9:29MS  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.