September 2002 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  16:23MS 19:47SS         21:34TE  0:57MR  4:46TS          6:33SR          3:23VT 
 9- 2  17:22MS 19:46SS         21:31TE  1:57MR  4:48TS          6:34SR          4:25VT 
 9- 3  18:13MS 19:43SS         21:30TE  3: 7MR  4:49TS          6:34SR          5:37VT 
 9- 4  18:55MS 19:42SS         21:27TE  4:25MR  4:50TS          6:35SR          6:57VT 
 9- 5  19:31MS 19:40SS         21:25TE          4:52TS  5:46MR  6:37SR          7:27VT 
 9- 6          19:38SS 20: 0MS 21:22TE          4:54TS          6:39SR  7: 9MR  7:31VT 
 9- 7          19:37SS 20:27MS 21:21TE          4:55TS          6:40SR  8:30MR  7:34VT 
 9- 8          19:34SS 20:51MS 21:19TE          4:56TS          6:40SR  9:51MR  7:37VT 
 9- 9          19:32SS         21:16TE 21:16MS  4:58TS          6:41SR 11:11MR  7:42VT 
 9-10          19:31SS         21:13TE 21:43MS  5: 0TS          6:43SR          7:16VT 
 9-11  12:31MR 19:28SS         21:12TE 22:15MS  5: 1TS          6:45SR          6:46VT 
 9-12  13:46MR 19:27SS         21:10TE 22:51MS  5: 3TS          6:46SR          6:11VT 
 9-13  14:58MR 19:25SS         21: 7TE 23:34MS  5: 4TS          6:46SR          5:29VT 
 9-14  16: 1MR 19:22SS         21: 6TE  0:28MS  5: 5TS          6:49SR          4:37VT 
 9-15  16:49MR 19:21SS         21: 4TE  1:27MS  5: 7TS          6:49SR          3:40VT 
 9-16  17:37MR 19:19SS         21: 1TE  2:31MS  5: 9TS          6:50SR          2:37VT 
 9-17  18:12MR 19:16SS         20:58TE  3:37MS  5:10TS          6:52SR          1:32VT 
 9-18  18:38MR 19:15SS         20:57TE  4:41MS  5:10TS          6:52SR          0:28VT 
 9-19  19: 2MR 19:13SS         20:55TE          5:13TS  5:46MS  6:55SR          0: 0VT 
 9-20          19:12SS 19:22MR 20:52TE          5:13TS  6:49MS  6:55SR          0: 0VT 
 9-21          19:10SS 19:42MR 20:51TE          5:16TS          6:56SR  7:52MS  0: 0VT 
 9-22          19: 7SS 20: 1MR 20:49TE          5:16TS          6:58SR  8:53MS  0: 0VT 
 9-23          19: 6SS 20:19MR 20:46TE          5:18TS          7: 0SR  9:56MS  0: 0VT 
 9-24          19: 4SS 20:40MR 20:45TE          5:19TS          7: 1SR 11: 1MS  0: 0VT 
 9-25          19: 1SS         20:43TE 21: 2MR  5:20TS          7: 1SR          0:19VT 
 9-26  12: 4MS 19: 0SS         20:40TE 21:31MR  5:22TS          7: 3SR          0:50VT 
 9-27  13:10MS 18:58SS         20:38TE 22: 4MR  5:24TS          7: 4SR          1:25VT 
 9-28  14:13MS 18:55SS         20:37TE 22:47MR  5:25TS          7: 5SR          2:10VT 
 9-29  15:13MS 18:53SS         20:34TE 23:40MR  5:25TS          7: 7SR          3: 6VT 
 9-30  16: 4MS 18:52SS         20:32TE  0:45MR  5:28TS          7: 7SR          4:12VT 

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.