April 2001 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

Pacific Daylight Saving Time (PDT) starts April 1, 2:00 am, The below times are PDT 
 4- 1  12: 1MR 19:38SS         21:22TE  3:57MS  5: 4TS          6:48SR          1: 7VT 
 4- 2  13: 7MR 19:40SS         21:23TE  4:43MS  5: 1TS          6:46SR          0:17VT 
 4- 3  14:21MR 19:40SS         21:25TE          5: 0TS  5:24MS  6:43SR          0: 0VT 
 4- 4  17: 0MR 19:43SS         21:27TE          4:58TS  5:56MS  6:41SR          0: 0VT 
 4- 5  17:36MR 19:43SS         21:28TE          4:55TS  6:26MS  6:40SR          0: 0VT 
 4- 6  18:13MR 19:45SS         21:30TE          4:54TS          6:39SR  6:54MS  0: 0VT 
 4- 7  19:28MR 19:46SS         21:31TE          4:50TS          6:37SR  7:20MS  0: 0VT 
 4- 8          19:47SS 20:43MR 21:34TE          4:49TS          6:34SR  7:48MS  0: 0VT 
 4- 9          19:49SS         21:34TE 21:55MR  4:46TS          6:33SR  8:17MS  0:21VT 
 4-10          19:49SS         21:37TE 23: 7MR  4:45TS          6:31SR  8:49MS  1:30VT 
 4-11          19:52SS         21:38TE  0:13MR  4:43TS          6:30SR  9:27MS  2:35VT 
 4-12          19:52SS         21:40TE  1:15MR  4:40TS          6:28SR 10:11MS  3:34VT 
 4-13          19:53SS         21:42TE  2:10MR  4:37TS          6:25SR 11: 1MS  4:27VT 
 4-14          19:55SS         21:43TE  2:57MR  4:35TS          6:24SR 11:55MS  5:13VT 
 4-15          19:57SS         21:45TE  3:37MR  4:34TS          6:22SR          5:52VT 
 4-16  12:52MS 19:58SS         21:46TE  4:11MR  4:31TS          6:20SR          6:25VT 
 4-17  13:53MS 19:58SS         21:49TE          4:30TS  4:40MR  6:19SR          6:40VT 
 4-18  14:55MS 20: 1SS         21:49TE          4:28TS  5: 7MR  6:16SR          6:38VT 
 4-19  15:58MS 20: 1SS         21:52TE          4:25TS  5:30MR  6:16SR          6:33VT 
 4-20  17: 1MS 20: 2SS         21:53TE          4:22TS  5:52MR  6:13SR          6:29VT 
 4-21  18: 7MS 20: 4SS         21:55TE          4:20TS          6:11SR  6:16MR  6:25VT 
 4-22  19:13MS 20: 6SS         21:57TE          4:19TS          6:10SR  6:40MR  6:21VT 
 4-23          20: 7SS 20:22MS 21:58TE          4:16TS          6: 9SR  7: 5MR  6:18VT 
 4-24          20: 7SS 21:31MS 22: 1TE          4:15TS          6: 7SR  7:37MR  6:13VT 
 4-25          20:10SS         22: 2TE 22:43MS  4:13TS          6: 5SR  8:14MR  5:29VT 
 4-26          20:10SS         22: 4TE 23:52MS  4:10TS          6: 4SR  8:59MR  4:18VT 
 4-27          20:12SS         22: 6TE  0:57MS  4: 7TS          6: 3SR  9:53MR  3: 9VT 
 4-28          20:13SS         22: 7TE  1:55MS  4: 5TS          6: 1SR 10:58MR  2:10VT 
 4-29          20:15SS         22:10TE  2:45MS  4: 4TS          5:58SR          1:19VT 
 4-30  12: 8MR 20:16SS         22:12TE  3:25MS  4: 1TS          5:58SR          0:36VT

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.