May 2004 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  16:42MR 20:17SS         22:13TE          4: 0TS  5: 3MS  5:55SR          0: 0VT 
 5- 2  17:58MR 20:19SS         22:16TE          3:58TS  5:22MS  5:55SR          0: 0VT 
 5- 3  19:17MR 20:19SS         22:17TE          3:55TS  5:46MS  5:52SR          0: 0VT 
 5- 4          20:21SS 20:43MR 22:19TE          3:52TS          5:52SR  6:16MS  0: 0VT 
 5- 5          20:22SS 22: 7MR 22:22TE          3:50TS          5:49SR  6:52MS  0: 0VT 
 5- 6          20:23SS         22:23TE 23:31MR  3:49TS          5:49SR  7:43MS  1: 7VT 
 5- 7          20:25SS         22:25TE  0:43MR  3:46TS          5:48SR  8:45MS  2:18VT 
 5- 8          20:25SS         22:27TE  1:40MR  3:45TS          5:46SR  9:57MS  3:13VT 
 5- 9          20:28SS         22:28TE  2:25MR  3:43TS          5:45SR 11:16MS  3:56VT 
 5-10          20:28SS         22:31TE  2:57MR  3:42TS          5:43SR          4:25VT 
 5-11  12:34MS 20:30SS         22:32TE  3:22MR  3:40TS          5:43SR          4:49VT 
 5-12  13:49MS 20:31SS         22:34TE          3:37TS  3:43MR  5:40SR          5: 3VT 
 5-13  14:58MS 20:31SS         22:37TE          3:35TS  4: 1MR  5:40SR          4:58VT 
 5-14  16: 7MS 20:34SS         22:38TE          3:34TS  4:18MR  5:39SR          4:55VT 
 5-15  17:15MS 20:34SS         22:40TE          3:31TS  4:34MR  5:37SR          4:51VT 
 5-16  18:22MS 20:36SS         22:42TE          3:30TS  4:54MR  5:37SR          4:47VT 
 5-17  19:28MS 20:37SS         22:43TE          3:28TS  5:15MR  5:35SR          4:45VT 
 5-18  20:36MS 20:37SS         22:46TE          3:27TS          5:34SR  5:40MR  4:40VT 
 5-19          20:38SS 21:40MS 22:47TE          3:25TS          5:34SR  6:13MR  4:37VT 
 5-20          20:40SS 22:43MS 22:49TE          3:24TS          5:33SR  6:52MR  4:34VT 
 5-21          20:40SS         22:51TE 23:40MS  3:22TS          5:31SR  7:40MR  3:41VT 
 5-22          20:43SS         22:52TE  0:28MS  3:19TS          5:31SR  8:37MR  2:51VT 
 5-23          20:43SS         22:55TE  1: 7MS  3:19TS          5:30SR  9:41MR  2:12VT 
 5-24          20:45SS         22:57TE  1:39MS  3:16TS          5:28SR 10:48MR  1:37VT 
 5-25          20:46SS         22:58TE  2: 4MS  3:16TS          5:28SR 11:56MR  1:11VT 
 5-26          20:46SS         23: 0TE  2:27MS  3:13TS          5:28SR          0:46VT 
 5-27  13: 7MR 20:47SS         23: 1TE  2:46MS  3:13TS          5:26SR          0:26VT 
 5-28  14:18MR 20:47SS         23: 2TE  3: 5MS  3:12TS          5:25SR          0: 6VT 
 5-29  15:31MR 20:49SS         23: 4TE          3:10TS  3:25MS  5:25SR          0: 0VT 
 5-30  16:51MR 20:49SS         23: 6TE          3: 9TS  3:46MS  5:25SR          0: 0VT 
 5-31  18:10MR 20:51SS         23: 7TE          3: 7TS  4:11MS  5:25SR          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.