May 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

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