December 2006 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  14:11MR 16:28SS         18:13TE  4:50MS  5:45TS          7:31SR          0:54VT 
12- 2  14:37MR 16:28SS         18:13TE          5:46TS  6:15MS  7:31SR          0: 0VT 
12- 3  15:10MR 16:27SS         18:13TE          5:46TS          7:34SR  7:35MS  0: 0VT 
12- 4  15:58MR 16:27SS         18:13TE          5:48TS          7:34SR  8:49MS  0: 0VT 
12- 5          16:27SS 16:46MR 18:13TE          5:49TS          7:35SR  9:49MS  0: 0VT 
12- 6          16:27SS 17:51MR 18:13TE          5:49TS          7:37SR 10:36MS  0: 0VT 
12- 7          16:27SS         18:13TE 19: 1MR  5:50TS          7:37SR 11:10MS  0:48VT 
12- 8          16:27SS         18:13TE 20:15MR  5:52TS          7:39SR 11:37MS  2: 1VT 
12- 9          16:25SS         18:13TE 21:25MR  5:52TS          7:40SR 11:56MS  3:12VT 
12-10          16:25SS         18:13TE 22:32MR  5:52TS          7:40SR          4:19VT 
12-11  12:13MS 16:25SS         18:13TE 23:37MR  5:54TS          7:40SR          5:23VT 
12-12  12:30MS 16:27SS         18:13TE  0:42MR  5:55TS          7:41SR          6:28VT 
12-13  12:45MS 16:27SS         18:13TE  1:45MR  5:55TS          7:43SR          7:31VT 
12-14  13: 0MS 16:27SS         18:13TE  2:49MR  5:55TS          7:43SR          8:36VT 
12-15  13:16MS 16:27SS         18:13TE  3:57MR  5:56TS          7:43SR          9:43VT 
12-16  13:37MS 16:27SS         18:15TE  5: 7MR  5:58TS          7:45SR         10:52VT 
12-17  14: 3MS 16:28SS         18:15TE          5:58TS  6:16MR  7:46SR         11:43VT 
12-18  14:37MS 16:28SS         18:15TE          5:58TS  7:25MR  7:46SR         11:44VT 
12-19  15:21MS 16:28SS         18:16TE          6: 0TS          7:46SR  8:27MR 11:43VT 
12-20  16:19MS 16:28SS         18:16TE          6: 0TS          7:48SR  9:19MR 11:43VT 
12-21          16:28SS 17:28MS 18:16TE          6: 1TS          7:48SR 10: 0MR 11:44VT 
12-22          16:30SS         18:16TE 18:45MS  6: 1TS          7:48SR 10:31MR 11:15VT 
12-23          16:30SS         18:17TE 20: 4MS  6: 1TS          7:49SR 10:56MR  9:56VT 
12-24          16:31SS         18:17TE 21:23MS  6: 1TS          7:49SR 11:18MR  8:37VT 
12-25          16:31SS         18:19TE 22:40MS  6: 1TS          7:49SR 11:37MR  7:21VT 
12-26          16:31SS         18:19TE 23:58MS  6: 3TS          7:49SR 11:55MR  6: 4VT 
12-27          16:32SS         18:19TE  1:16MS  6: 3TS          7:49SR          4:47VT 
12-28  12:16MR 16:34SS         18:21TE  2:34MS  6: 3TS          7:49SR          3:28VT 
12-29  12:38MR 16:34SS         18:22TE  3:55MS  6: 3TS          7:49SR          2: 7VT 
12-30  13: 7MR 16:34SS         18:22TE  5:16MS  6: 3TS          7:50SR          0:47VT 
12-31  13:43MR 16:36SS         18:22TE          6: 4TS  6:31MS  7:50SR          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.