May 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

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