October 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

10- 1  17:32MR 18:49SS         20:30TE          5:30TS  5:34MS  7:10SR          0: 0VT 
10- 2  17:52MR 18:47SS         20:28TE          5:31TS  6:41MS  7:10SR          0: 0VT 
10- 3  18:12MR 18:46SS         20:25TE          5:31TS          7:13SR  7:52MS  0: 0VT 
10- 4  18:34MR 18:43SS         20:23TE          5:34TS          7:13SR  9: 3MS  0: 0VT 
10- 5          18:42SS 19: 0MR 20:22TE          5:34TS          7:15SR 10:16MS  0: 0VT 
10- 6          18:40SS 19:31MR 20:21TE          5:35TS          7:16SR 11:30MS  0: 0VT 
10- 7          18:38SS 20:13MR 20:19TE          5:37TS          7:18SR          0: 0VT 
10- 8  12:40MS 18:37SS         20:16TE 21: 4MR  5:39TS          7:19SR          0:47VT 
10- 9  13:40MS 18:34SS         20:15TE 22: 7MR  5:40TS          7:19SR          1:52VT 
10-10  14:31MS 18:32SS         20:13TE 23:21MR  5:40TS          7:22SR          3: 7VT 
10-11  15:10MS 18:31SS         20:10TE  0:38MR  5:43TS          7:22SR          4:27VT 
10-12  15:43MS 18:28SS         20:10TE  1:57MR  5:43TS          7:24SR          5:46VT 
10-13  16:10MS 18:28SS         20: 7TE  3:15MR  5:45TS          7:25SR          7: 7VT 
10-14  17: 0MS 18:25SS         20: 6TE  4:31MR  5:46TS          7:26SR          8:25VT 
10-15  17: 8MS 18:23SS         20: 4TE          5:48TS  5:48MR  7:28SR          9:43VT 
10-16  17:17MS 18:22SS         20: 2TE          5:49TS  7: 3MR  7:30SR          9:46VT 
10-17  17:42MS 18:21SS         20: 1TE          5:50TS          7:31SR  8:18MR  9:49VT 
10-18  18: 8MS 18:19SS         19:58TE          5:52TS          7:31SR  9:32MR  9:53VT 
10-19          18:16SS 18:40MS 19:58TE          5:52TS          7:34SR 10:41MR  9:54VT 
10-20          18:16SS 19:19MS 19:55TE          5:54TS          7:34SR 11:45MR  9:58VT 
10-21          18:13SS         19:53TE 20: 6MS  5:55TS          7:35SR          9:49VT 
10-22  12:40MR 18:12SS         19:52TE 21: 0MS  5:56TS          7:37SR          8:56VT 
10-23  13:25MR 18:10SS         19:51TE 21:58MS  5:58TS          7:39SR          7:59VT 
10-24  14: 1MR 18: 8SS         19:49TE 23: 1MS  6: 0TS          7:40SR          6:58VT 
10-25  14:31MR 18: 7SS         19:47TE  0: 6MS  6: 1TS          7:41SR          5:55VT 
10-26  14:55MR 18: 6SS         19:46TE  1:10MS  6: 1TS          7:43SR          4:51VT 
10-27  15:16MR 18: 4SS         19:45TE  2:15MS  6: 3TS          7:45SR          3:48VT 
10-28  15:36MR 18: 2SS         19:43TE  3:19MS  6: 4TS          7:46SR          2:45VT 
10-29  15:55MR 18: 1SS         19:42TE  4:25MS  6: 5TS          7:48SR          1:40VT 
10-30  16:15MR 18: 0SS         19:40TE  5:34MS  6: 7TS          7:49SR          0:32VT 
10-31  16:36MR 17:58SS         19:40TE          6: 9TS  6:45MS  7:49SR          0: 0VT 

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.