July 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

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