February 1999 Dark Sky Observing Time

The dark sky table shows the 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

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