July 2011 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: 2SS 21:21MS 23:23TE          3: 4TS          5:25SR  7: 0MR  3:41VT 
 7- 2          21: 1SS 21:55MS 23:22TE          3: 5TS          5:26SR  8:12MR  3:43VT 
 7- 3          21: 1SS 22:27MS 23:22TE          3: 7TS          5:26SR  9:27MR  3:44VT 
 7- 4          21: 1SS 22:53MS 23:22TE          3: 7TS          5:28SR 10:41MR  3:45VT 
 7- 5          21: 1SS 23:19MS 23:21TE          3: 9TS          5:28SR 11:56MR  3:47VT 
 7- 6          21: 1SS         23:19TE 23:46MS  3:10TS          5:28SR          3:23VT 
 7- 7  13:11MR 21: 1SS         23:19TE  0:13MS  3:12TS          5:30SR          2:59VT 
 7- 8  14:28MR 21: 0SS         23:17TE  0:43MS  3:13TS          5:31SR          2:29VT 
 7- 9  17: 0MR 21: 0SS         23:16TE  1:19MS  3:13TS          5:31SR          1:54VT 
 7-10  17:31MR 20:58SS         23:16TE  2: 4MS  3:16TS          5:31SR          1:11VT 
 7-11  18: 4MR 20:58SS         23:15TE  2:55MS  3:16TS          5:33SR          0:21VT 
 7-12  19: 2MR 20:58SS         23:13TE          3:19TS  3:55MS  5:34SR          0: 0VT 
 7-13  19:52MR 20:57SS         23:12TE          3:19TS  5: 1MS  5:34SR          0: 0VT 
 7-14  20:32MR 20:57SS         23:10TE          3:22TS          5:35SR  6: 9MS  0: 0VT 
 7-15          20:55SS 21: 7MR 23: 8TE          3:22TS          5:37SR  7:18MS  0: 0VT 
 7-16          20:55SS 21:34MR 23: 7TE          3:25TS          5:37SR  8:23MS  0: 0VT 
 7-17          20:53SS 21:58MR 23: 6TE          3:27TS          5:39SR  9:29MS  0: 0VT 
 7-18          20:53SS 22:21MR 23: 4TE          3:28TS          5:40SR 10:31MS  0: 0VT 
 7-19          20:52SS 22:42MR 23: 2TE          3:30TS          5:40SR 11:34MS  0: 0VT 
 7-20          20:52SS         23: 1TE 23: 2MR  3:31TS          5:41SR          0: 1VT 
 7-21  12:36MS 20:51SS         23: 0TE 23:25MR  3:34TS          5:43SR          0:25VT 
 7-22  13:37MS 20:49SS         22:58TE 23:52MR  3:34TS          5:43SR          0:54VT 
 7-23  14:40MS 20:49SS         22:57TE  0:21MR  3:37TS          5:45SR          1:23VT 
 7-24  15:41MS 20:47SS         22:55TE  0:57MR  3:39TS          5:46SR          2: 1VT 
 7-25  16:40MS 20:46SS         22:52TE  1:40MR  3:40TS          5:46SR          2:47VT 
 7-26  17:38MS 20:46SS         22:51TE  2:31MR  3:42TS          5:48SR          3:40VT 
 7-27  18:30MS 20:45SS         22:49TE  3:31MR  3:43TS          5:49SR          4:42VT 
 7-28  19:15MS 20:43SS         22:47TE          3:46TS  4:40MR  5:50SR          4:58VT 
 7-29  19:53MS 20:42SS         22:46TE          3:47TS          5:52SR  5:54MR  5: 1VT 
 7-30  20:27MS 20:40SS         22:43TE          3:49TS          5:52SR  7:10MR  5: 6VT 
 7-31          20:40SS 20:55MS 22:42TE          3:52TS          5:54SR  8:26MR  5: 9VT 

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.