September 2000 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          19:46SS         21:32TE 21:53MS  4:46TS          6:33SR 11:23MR  6:52VT 
 9- 2          19:45SS         21:31TE 22:21MS  4:49TS          6:34SR          6:28VT 
 9- 3  12:31MR 19:43SS         21:28TE 22:49MS  4:49TS          6:35SR          6: 0VT 
 9- 4  13:34MR 19:40SS         21:25TE 23:22MS  4:52TS          6:37SR          5:29VT 
 9- 5  14:34MR 19:38SS         21:23TE 23:58MS  4:52TS          6:37SR          4:54VT 
 9- 6  15:31MR 19:37SS         21:22TE  0:40MS  4:55TS          6:39SR          4:14VT 
 9- 7  16:23MR 19:36SS         21:19TE  1:28MS  4:55TS          6:40SR          3:27VT 
 9- 8  17:10MR 19:34SS         21:17TE  2:20MS  4:58TS          6:41SR          2:37VT 
 9- 9  17:51MR 19:31SS         21:15TE  3:17MS  4:58TS          6:43SR          1:40VT 
 9-10  18:27MR 19:30SS         21:13TE  4:19MS  5: 1TS          6:43SR          0:41VT 
 9-11  18:58MR 19:28SS         21:10TE          5: 1TS  5:22MS  6:45SR          0: 0VT 
 9-12          19:25SS 19:25MR 21: 8TE          5: 4TS  6:25MS  6:46SR          0: 0VT 
 9-13          19:23SS 19:52MR 21: 7TE          5: 4TS          6:48SR  7:31MS  0: 0VT 
 9-14          19:22SS 20:16MR 21: 4TE          5: 7TS          6:49SR  8:37MS  0: 0VT 
 9-15          19:19SS 20:42MR 21: 2TE          5: 7TS          6:49SR  9:45MS  0: 0VT 
 9-16          19:17SS         21: 0TE 21: 7MR  5: 9TS          6:52SR 10:55MS  0: 7VT 
 9-17          19:16SS         20:58TE 21:37MR  5:10TS          6:52SR          0:39VT 
 9-18  12: 6MS 19:15SS         20:55TE 22:12MR  5:11TS          6:54SR          1:16VT 
 9-19  13:16MS 19:13SS         20:53TE 22:52MR  5:13TS          6:55SR          1:58VT 
 9-20  14:25MS 19:10SS         20:52TE 23:40MR  5:15TS          6:56SR          2:48VT 
 9-21  15:28MS 19: 8SS         20:49TE  0:39MR  5:16TS          6:58SR          3:49VT 
 9-22  16:25MS 19: 7SS         20:47TE  1:45MR  5:18TS          6:58SR          4:57VT 
 9-23  17:13MS 19: 4SS         20:46TE  2:57MR  5:19TS          7: 0SR          6:10VT 
 9-24  17:52MS 19: 2SS         20:43TE  4:13MR  5:19TS          7: 1SR          7:29VT 
 9-25  18:28MS 19: 1SS         20:42TE          5:22TS  5:28MR  7: 3SR          8:39VT 
 9-26  18:58MS 18:58SS         20:40TE          5:22TS  6:41MR  7: 4SR          8:42VT 
 9-27          18:57SS 19:25MS 20:37TE          5:24TS          7: 4SR  7:54MR  8:46VT 
 9-28          18:55SS 19:52MS 20:36TE          5:25TS          7: 5SR  9: 4MR  8:49VT 
 9-29          18:52SS 20:19MS 20:34TE          5:26TS          7: 7SR 10:13MR  8:52VT 
 9-30          18:51SS         20:31TE 20:46MS  5:28TS          7: 9SR 11:19MR  8:41VT

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.