February 2001 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         19: 0TE  1:51MS  5:46TS          7:30SR          3:55VT 
 2- 2  12: 1MR 17:19SS         19: 1TE  3: 1MS  5:46TS          7:28SR          2:44VT 
 2- 3  12:40MR 17:19SS         19: 2TE  4:13MS  5:45TS          7:26SR          1:31VT 
 2- 4  13:28MR 17:22SS         19: 4TE  5:22MS  5:43TS          7:25SR          0:21VT 
 2- 5  14:26MR 17:22SS         19: 4TE          5:43TS  6:22MS  7:25SR          0: 0VT 
 2- 6  15:40MR 17:25SS         19: 7TE          5:41TS  7:15MS  7:22SR          0: 0VT 
 2- 7  16:53MR 17:25SS         19: 7TE          5:40TS          7:22SR  7:58MS  0: 0VT 
 2- 8          17:27SS 18:13MR 19: 8TE          5:39TS          7:20SR  8:33MS  0: 0VT 
 2- 9          17:28SS         19:10TE 19:34MR  5:37TS          7:19SR  9: 3MS  0:23VT 
 2-10          17:30SS         19:12TE 20:52MR  5:35TS          7:18SR  9:32MS  1:40VT 
 2-11          17:31SS         19:13TE 22: 6MR  5:34TS          7:16SR  9:57MS  2:52VT 
 2-12          17:32SS         19:15TE 23:17MR  5:34TS          7:15SR 10:25MS  4: 2VT 
 2-13          17:34SS         19:16TE  0:27MR  5:31TS          7:13SR 10:52MS  5:10VT 
 2-14          17:36SS         19:16TE  1:32MR  5:31TS          7:11SR 11:23MS  6:16VT 
 2-15          17:37SS         19:19TE  2:37MR  5:28TS          7:10SR          7:17VT 
 2-16  12: 0MS 17:38SS         19:19TE  3:35MR  5:28TS          7: 7SR          8:16VT 
 2-17  12:40MS 17:40SS         19:21TE  4:31MR  5:25TS          7: 7SR          9: 9VT 
 2-18  13:25MS 17:42SS         19:22TE  5:19MR  5:25TS          7: 4SR          9:56VT 
 2-19  14:18MS 17:43SS         19:23TE          5:22TS  6: 0MR  7: 4SR          9:59VT 
 2-20  15:15MS 17:45SS         19:25TE          5:22TS  6:35MR  7: 1SR          9:56VT 
 2-21  16:13MS 17:46SS         19:27TE          5:19TS          7: 0SR  7: 7MR  9:52VT 
 2-22  17:16MS 17:47SS         19:28TE          5:18TS          6:58SR  7:34MR  9:49VT 
 2-23          17:49SS 18:17MS 19:30TE          5:16TS          6:56SR  7:58MR  9:46VT 
 2-24          17:51SS 19:19MS 19:31TE          5:15TS          6:55SR  8:22MR  9:43VT 
 2-25          17:52SS         19:31TE 20:23MS  5:13TS          6:52SR  8:44MR  8:49VT 
 2-26          17:52SS         19:34TE 21:28MS  5:11TS          6:52SR  9: 7MR  7:43VT 
 2-27          17:55SS         19:34TE 22:32MS  5:10TS          6:49SR  9:33MR  6:37VT 
 2-28          17:55SS         19:36TE 23:40MS  5: 7TS          6:48SR 10: 1MR  5:27VT

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.