July 2009 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  16:19MR 21: 1SS         23:22TE  1:37MS  3: 4TS          5:25SR          1:27VT 
 7- 2  17:27MR 21: 1SS         23:22TE  2:10MS  3: 5TS          5:26SR          0:55VT 
 7- 3  18:31MR 21: 1SS         23:22TE  2:50MS  3: 7TS          5:28SR          0:16VT 
 7- 4  19:28MR 21: 1SS         23:21TE          3: 9TS  3:40MS  5:28SR          0: 0VT 
 7- 5  20:16MR 21: 1SS         23:19TE          3:10TS  4:34MS  5:28SR          0: 0VT 
 7- 6  20:55MR 21: 1SS         23:19TE          3:10TS          5:30SR  5:35MS  0: 0VT 
 7- 7          21: 0SS 21:28MR 23:19TE          3:12TS          5:30SR  6:40MS  0: 0VT 
 7- 8          21: 0SS 21:55MR 23:16TE          3:13TS          5:31SR  7:45MS  0: 0VT 
 7- 9          20:58SS 22:17MR 23:16TE          3:15TS          5:31SR  8:49MS  0: 0VT 
 7-10          20:58SS 22:37MR 23:15TE          3:16TS          5:33SR  9:55MS  0: 0VT 
 7-11          20:58SS 22:55MR 23:13TE          3:17TS          5:34SR 10:58MS  0: 0VT 
 7-12          20:58SS         23:13TE 23:13MR  3:19TS          5:34SR          0: 0VT 
 7-13  12: 4MS 20:57SS         23:10TE 23:32MR  3:20TS          5:34SR          0:22VT 
 7-14  13:13MS 20:55SS         23:10TE 23:53MR  3:22TS          5:35SR          0:43VT 
 7-15  14:25MS 20:55SS         23: 8TE  0:19MR  3:24TS          5:37SR          1:11VT 
 7-16  15:38MS 20:55SS         23: 7TE  0:52MR  3:25TS          5:37SR          1:44VT 
 7-17  16:53MS 20:53SS         23: 6TE  1:34MR  3:28TS          5:39SR          2:28VT 
 7-18  18: 8MS 20:52SS         23: 4TE  2:30MR  3:28TS          5:40SR          3:25VT 
 7-19  19:13MS 20:52SS         23: 2TE          3:31TS  3:40MR  5:40SR          4:28VT 
 7-20  20: 6MS 20:51SS         23: 1TE          3:32TS  5: 1MR  5:41SR          4:31VT 
 7-21  20:46MS 20:49SS         22:58TE          3:34TS          5:43SR  6:25MR  4:35VT 
 7-22          20:49SS 21:19MS 22:58TE          3:35TS          5:43SR  7:49MR  4:37VT 
 7-23          20:47SS 21:45MS 22:55TE          3:37TS          5:46SR  9:11MR  4:42VT 
 7-24          20:46SS 22: 7MS 22:53TE          3:40TS          5:46SR 10:28MR  4:46VT 
 7-25          20:46SS 22:28MS 22:52TE          3:42TS          5:48SR 11:43MR  4:49VT 
 7-26          20:45SS         22:51TE 22:51MS  3:43TS          5:49SR          4:52VT 
 7-27  12:58MR 20:43SS         22:49TE 23:13MS  3:45TS          5:49SR          4:31VT 
 7-28  14: 8MR 20:43SS         22:46TE 23:40MS  3:46TS          5:50SR          4: 6VT 
 7-29  15:18MR 20:42SS         22:45TE  0:12MS  3:49TS          5:52SR          3:37VT 
 7-30  16:22MR 20:40SS         22:43TE  0:50MS  3:50TS          5:52SR          3: 0VT 
 7-31  17:22MR 20:38SS         22:40TE  1:36MS  3:52TS          5:55SR          2:16VT 

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.