April 2004 Dark Sky Observing Time

The dark sky table shows the Pacific Daylight Saving Time (PDT) times and Pacific Standard Time (PST) 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

 4- 1  14:22MR 18:38SS         20:22TE          4: 4TS  5: 0MS  5:48SR          0: 0VT 
 4- 2  15:36MR 18:40SS         20:25TE          4: 1TS  5:20MS  5:46SR          0: 0VT 
 4- 3  16:51MR 18:42SS         20:25TE          3:58TS  5:40MS  5:43SR          0: 0VT 
Pacific Daylight Saving Time (PDT) starts April 4, 2:00 am, The below times are PDT 
 4- 4  19: 7MR 19:43SS         21:28TE          4:56TS          6:41SR  7: 1MS  0: 0VT 
 4- 5          19:43SS 20:25MR 21:28TE          4:55TS          6:40SR  7:22MS  0: 0VT 
 4- 6          19:46SS         21:31TE 21:46MR  4:52TS          6:37SR  7:48MS  0:15VT 
 4- 7          19:46SS         21:32TE 23:10MR  4:50TS          6:35SR  8:19MS  1:37VT 
 4- 8          19:47SS         21:34TE  0:33MR  4:49TS          6:34SR  9: 0MS  2:58VT 
 4- 9          19:49SS         21:36TE  1:49MR  4:46TS          6:33SR  9:52MS  4:13VT 
 4-10          19:51SS         21:37TE  2:54MR  4:43TS          6:31SR 10:58MS  5:16VT 
 4-11          19:52SS         21:38TE  3:45MR  4:41TS          6:28SR          6: 6VT 
 4-12  12:11MS 19:52SS         21:40TE  4:22MR  4:40TS          6:26SR          6:42VT 
 4-13  13:28MS 19:55SS         21:42TE          4:37TS  4:52MR  6:25SR          6:55VT 
 4-14  14:43MS 19:55SS         21:43TE          4:35TS  5:16MR  6:24SR          6:52VT 
 4-15  15:58MS 19:57SS         21:46TE          4:34TS  5:35MR  6:22SR          6:47VT 
 4-16  17: 7MS 19:58SS         21:46TE          4:31TS  5:54MR  6:19SR          6:44VT 
 4-17  18:16MS 20: 0SS         21:49TE          4:28TS  6:10MR  6:19SR          6:39VT 
 4-18  19:23MS 20: 1SS         21:51TE          4:26TS          6:16SR  6:28MR  6:35VT 
 4-19          20: 1SS 20:31MS 21:52TE          4:25TS          6:15SR  6:48MR  6:32VT 
 4-20          20: 4SS 21:38MS 21:53TE          4:22TS          6:13SR  7:10MR  6:29VT 
 4-21          20: 4SS         21:55TE 22:46MS  4:20TS          6:11SR  7:39MR  5:34VT 
 4-22          20: 6SS         21:58TE 23:52MS  4:19TS          6:10SR  8:12MR  4:26VT 
 4-23          20: 7SS         22: 0TE  0:52MS  4:16TS          6: 9SR  8:56MR  3:24VT 
 4-24          20: 8SS         22: 1TE  1:46MS  4:13TS          6: 7SR  9:47MR  2:27VT 
 4-25          20:10SS         22: 2TE  2:31MS  4:11TS          6: 4SR 10:46MR  1:40VT 
 4-26          20:10SS         22: 4TE  3: 7MS  4:10TS          6: 4SR 11:52MR  1: 2VT 
 4-27          20:13SS         22: 7TE  3:37MS  4: 7TS          6: 1SR          0:30VT 
 4-28  13: 1MR 20:13SS         22: 8TE  4: 1MS  4: 5TS          6: 1SR          0: 4VT 
 4-29  14:13MR 20:15SS         22:10TE          4: 4TS  4:24MS  5:58SR          0: 0VT 
 4-30  15:25MR 20:16SS         22:12TE          4: 1TS  4:43MS  5:58SR          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.