May 2003 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

 5- 1          20:16SS 20:45MS 22:13TE          4: 1TS          5:56SR  6:37MR  5:47VT 
 5- 2          20:17SS 21:49MS 22:15TE          3:58TS          5:55SR  7: 4MR  5:43VT 
 5- 3          20:19SS         22:16TE 22:55MS  3:57TS          5:54SR  7:37MR  5: 1VT 
 5- 4          20:21SS         22:17TE 23:57MS  3:55TS          5:52SR  8:18MR  3:57VT 
 5- 5          20:22SS         22:19TE  0:53MS  3:52TS          5:50SR  9: 8MR  2:59VT 
 5- 6          20:22SS         22:22TE  1:43MS  3:50TS          5:49SR 10: 8MR  2: 7VT 
 5- 7          20:23SS         22:23TE  2:24MS  3:49TS          5:49SR 11:16MR  1:25VT 
 5- 8          20:25SS         22:25TE  2:58MS  3:46TS          5:46SR          0:48VT 
 5- 9  12:28MR 20:27SS         22:28TE  3:27MS  3:45TS          5:46SR          0:17VT 
 5-10  13:43MR 20:28SS         22:30TE          3:43TS  3:52MS  5:45SR          0: 0VT 
 5-11  15: 0MR 20:28SS         22:31TE          3:40TS  4:13MS  5:43SR          0: 0VT 
 5-12  16:19MR 20:30SS         22:32TE          3:39TS  4:37MS  5:41SR          0: 0VT 
 5-13  17:38MR 20:31SS         22:34TE          3:37TS  5: 0MS  5:40SR          0: 0VT 
 5-14  19: 2MR 20:32SS         22:37TE          3:34TS  5:26MS  5:40SR          0: 0VT 
 5-15  20:28MR 20:34SS         22:38TE          3:34TS          5:39SR  6: 0MS  0: 0VT 
 5-16          20:34SS 21:52MR 22:40TE          3:31TS          5:37SR  6:40MS  0: 0VT 
 5-17          20:36SS         22:43TE 23:12MR  3:30TS          5:37SR  7:31MS  0:28VT 
 5-18          20:37SS         22:45TE  0:19MR  3:28TS          5:35SR  8:34MS  1:34VT 
 5-19          20:37SS         22:46TE  1:12MR  3:27TS          5:34SR  9:45MS  2:25VT 
 5-20          20:40SS         22:47TE  1:52MR  3:25TS          5:34SR 10:56MS  3: 5VT 
 5-21          20:40SS         22:49TE  2:24MR  3:22TS          5:33SR          3:34VT 
 5-22  12: 8MS 20:42SS         22:52TE  2:49MR  3:22TS          5:31SR          3:56VT 
 5-23  13:16MS 20:43SS         22:53TE  3: 9MR  3:19TS          5:31SR          4:15VT 
 5-24  14:22MS 20:43SS         22:55TE          3:19TS  3:27MR  5:30SR          4:23VT 
 5-25  15:26MS 20:45SS         22:57TE          3:16TS  3:45MR  5:28SR          4:19VT 
 5-26  16:30MS 20:46SS         22:58TE          3:16TS  4: 1MR  5:28SR          4:17VT 
 5-27  17:32MS 20:46SS         23: 0TE          3:13TS  4:20MR  5:28SR          4:13VT 
 5-28  18:37MS 20:47SS         23: 1TE          3:13TS  4:41MR  5:26SR          4:11VT 
 5-29  19:42MS 20:49SS         23: 4TE          3:10TS  5: 7MR  5:25SR          4: 6VT 
 5-30  20:46MS 20:49SS         23: 4TE          3:10TS          5:25SR  5:37MR  4: 5VT 
 5-31          20:51SS 21:49MS 23: 7TE          3: 9TS          5:25SR  6:16MR  4: 1VT 

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.