December 2002 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

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

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.