May 2002 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         22:13TE  1:49MR  4: 1TS          5:56SR 10:25MS  3:35VT 
 5- 2          20:17SS         22:15TE  2:32MR  3:58TS          5:55SR 11:28MS  4:18VT 
 5- 3          20:19SS         22:16TE  3: 7MR  3:57TS          5:54SR          4:51VT 
 5- 4  12:31MS 20:21SS         22:19TE  3:35MR  3:54TS          5:52SR          5:16VT 
 5- 5  13:36MS 20:22SS         22:21TE          3:52TS  4: 0MR  5:50SR          5:30VT 
 5- 6  14:38MS 20:22SS         22:22TE          3:49TS  4:20MR  5:49SR          5:27VT 
 5- 7  15:41MS 20:25SS         22:23TE          3:47TS  4:40MR  5:48SR          5:24VT 
 5- 8  16:43MS 20:25SS         22:25TE          3:46TS  5: 0MR  5:46SR          5:20VT 
 5- 9  17:46MS 20:27SS         22:28TE          3:45TS  5:19MR  5:46SR          5:16VT 
 5-10  18:49MS 20:28SS         22:30TE          3:43TS  5:40MR  5:43SR          5:13VT 
 5-11  19:55MS 20:28SS         22:31TE          3:40TS          5:43SR  6: 4MR  5: 9VT 
 5-12          20:31SS 21: 1MS 22:34TE          3:39TS          5:41SR  6:34MR  5: 4VT 
 5-13          20:31SS 22:10MS 22:36TE          3:37TS          5:40SR  7:10MR  5: 0VT 
 5-14          20:32SS         22:37TE 23:15MS  3:34TS          5:40SR  7:55MR  4:19VT 
 5-15          20:34SS         22:40TE  0:15MS  3:32TS          5:39SR  8:49MR  3:17VT 
 5-16          20:34SS         22:40TE  1: 7MS  3:31TS          5:37SR  9:53MR  2:23VT 
 5-17          20:36SS         22:43TE  1:52MS  3:30TS          5:35SR 11: 6MR  1:37VT 
 5-18          20:37SS         22:45TE  2:28MS  3:28TS          5:34SR          1: 0VT 
 5-19  12:21MR 20:38SS         22:46TE  2:58MS  3:25TS          5:34SR          0:26VT 
 5-20  13:37MR 20:40SS         22:49TE          3:25TS  3:25MS  5:33SR          0: 0VT 
 5-21  14:55MR 20:40SS         22:49TE          3:22TS  3:49MS  5:31SR          0: 0VT 
 5-22  16:13MR 20:42SS         22:52TE          3:20TS  4:13MS  5:31SR          0: 0VT 
 5-23  17:31MR 20:43SS         22:53TE          3:19TS  4:40MS  5:31SR          0: 0VT 
 5-24  18:51MR 20:43SS         22:55TE          3:17TS  5: 7MS  5:30SR          0: 0VT 
 5-25  20:10MR 20:45SS         22:57TE          3:16TS          5:28SR  5:41MS  0: 0VT 
 5-26          20:46SS 21:25MR 22:58TE          3:15TS          5:28SR  6:22MS  0: 0VT 
 5-27          20:46SS 22:36MR 23: 1TE          3:13TS          5:26SR  7:10MS  0: 0VT 
 5-28          20:47SS         23: 1TE 23:37MR  3:12TS          5:26SR  8: 7MS  0:35VT 
 5-29          20:49SS         23: 4TE  0:27MR  3:10TS          5:25SR  9:11MS  1:22VT 
 5-30          20:49SS         23: 4TE  1: 7MR  3:10TS          5:25SR 10:16MS  2: 2VT 
 5-31          20:51SS         23: 7TE  1:37MR  3: 9TS          5:25SR 11:22MS  2:30VT

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.