September 1999 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  12:58MS 19:47SS         21:34TE 23:19MR  4:46TS          6:31SR          1:45VT 
 9- 2  14:10MS 19:46SS         21:31TE  0: 3MR  4:48TS          6:34SR          2:31VT 
 9- 3  15:19MS 19:45SS         21:30TE  0:53MR  4:49TS          6:34SR          3:22VT 
 9- 4  16:21MS 19:43SS         21:28TE  1:49MR  4:50TS          6:35SR          4:20VT 
 9- 5  17:16MS 19:40SS         21:25TE  2:52MR  4:52TS          6:37SR          5:26VT 
 9- 6  18: 4MS 19:38SS         21:23TE  3:58MR  4:54TS          6:37SR          6:35VT 
 9- 7  18:45MS 19:37SS         21:21TE          4:55TS  5: 7MR  6:40SR          7:33VT 
 9- 8  19:19MS 19:34SS         21:19TE          4:56TS  6:16MR  6:40SR          7:37VT 
 9- 9          19:32SS 19:49MS 21:16TE          4:58TS          6:41SR  7:25MR  7:41VT 
 9-10          19:31SS 20:17MS 21:15TE          5: 0TS          6:43SR  8:30MR  7:45VT 
 9-11          19:28SS 20:43MS 21:13TE          5: 1TS          6:45SR  9:33MR  7:47VT 
 9-12          19:28SS         21:10TE 21:10MS  5: 3TS          6:46SR 10:36MR  7:52VT 
 9-13          19:25SS         21: 7TE 21:37MS  5: 4TS          6:46SR 11:37MR  7:26VT 
 9-14          19:23SS         21: 6TE 22: 7MS  5: 4TS          6:48SR          6:57VT 
 9-15  12:37MR 19:22SS         21: 4TE 22:38MS  5: 7TS          6:49SR          6:28VT 
 9-16  13:34MR 19:19SS         21: 1TE 23:15MS  5: 7TS          6:50SR          5:52VT 
 9-17  14:30MR 19:17SS         21: 0TE 23:55MS  5:10TS          6:52SR          5:14VT 
 9-18  15:22MR 19:16SS         20:58TE  0:42MS  5:10TS          6:52SR          4:28VT 
 9-19  16:10MR 19:13SS         20:55TE  1:34MS  5:11TS          6:54SR          3:37VT 
 9-20  16:51MR 19:12SS         20:53TE  2:34MS  5:13TS          6:55SR          2:39VT 
 9-21  17:32MR 19:10SS         20:52TE  3:37MS  5:15TS          6:56SR          1:37VT 
 9-22  18: 7MR 19: 7SS         20:49TE  4:43MS  5:16TS          6:58SR          0:32VT 
 9-23  18:40MR 19: 6SS         20:46TE          5:18TS  5:54MS  6:58SR          0: 0VT 
 9-24          19: 4SS 19:10MR 20:45TE          5:19TS          7: 1SR  7: 5MS  0: 0VT 
 9-25          19: 1SS 19:40MR 20:43TE          5:20TS          7: 1SR  8:18MS  0: 0VT 
 9-26          19: 1SS 20:10MR 20:40TE          5:22TS          7: 3SR  9:33MS  0: 0VT 
 9-27          18:58SS         20:38TE 20:43MR  5:22TS          7: 4SR 10:48MS  0: 4VT 
 9-28          18:57SS         20:37TE 21:19MR  5:25TS          7: 5SR          0:42VT 
 9-29  12: 1MS 18:55SS         20:34TE 22: 1MR  5:25TS          7: 7SR          1:26VT 
 9-30  13:11MS 18:52SS         20:32TE 22:49MR  5:26TS          7: 7SR          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.