September 2007 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

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

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.