December 2000 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  12: 0MR 16:28SS         18:13TE 21:38MS  5:46TS          7:31SR          8: 7VT 
12- 2  12:31MR 16:28SS         18:13TE 22:40MS  5:46TS          7:33SR          7: 6VT 
12- 3  12:58MR 16:27SS         18:13TE 23:42MS  5:48TS          7:34SR          6: 5VT 
12- 4  13:22MR 16:27SS         18:13TE  0:46MS  5:49TS          7:34SR          5: 3VT 
12- 5  13:46MR 16:27SS         18:13TE  1:52MS  5:49TS          7:35SR          3:57VT 
12- 6  14:10MR 16:27SS         18:13TE  2:58MS  5:49TS          7:37SR          2:50VT 
12- 7  14:36MR 16:27SS         18:13TE  4:10MS  5:50TS          7:37SR          1:40VT 
12- 8  15: 4MR 16:27SS         18:13TE  5:24MS  5:52TS          7:39SR          0:28VT 
12- 9  15:37MR 16:25SS         18:13TE          5:52TS  6:39MS  7:40SR          0: 0VT 
12-10  16:19MR 16:25SS         18:13TE          5:54TS          7:40SR  7:54MS  0: 0VT 
12-11          16:27SS 17: 8MR 18:13TE          5:55TS          7:41SR  9: 3MS  0: 0VT 
12-12          16:27SS 18: 8MR 18:13TE          5:55TS          7:43SR 10: 4MS  0: 0VT 
12-13          16:27SS         18:13TE 19:19MR  5:55TS          7:43SR 10:53MS  1: 5VT 
12-14          16:27SS         18:13TE 20:32MR  5:56TS          7:43SR 11:34MS  2:19VT 
12-15          16:27SS         18:15TE 21:49MR  5:56TS          7:45SR          3:34VT 
12-16  12: 7MS 16:27SS         18:15TE 23: 2MR  5:58TS          7:45SR          4:47VT 
12-17  12:37MS 16:28SS         18:15TE  0:15MR  5:58TS          7:46SR          6: 0VT 
12-18  13: 3MS 16:28SS         18:16TE  1:25MR  5:58TS          7:46SR          7: 8VT 
12-19  13:28MS 16:28SS         18:16TE  2:32MR  6: 0TS          7:46SR          8:16VT 
12-20  13:52MS 16:28SS         18:16TE  3:39MR  6: 0TS          7:48SR          9:22VT 
12-21  14:19MS 16:30SS         18:16TE  4:45MR  6: 1TS          7:48SR         10:28VT 
12-22  14:49MS 16:30SS         18:17TE  5:49MR  6: 1TS          7:49SR         11:31VT 
12-23  15:22MS 16:31SS         18:17TE          6: 1TS  6:49MR  7:49SR         11:44VT 
12-24  16: 1MS 16:31SS         18:19TE          6: 1TS  7:46MR  7:49SR         11:42VT 
12-25          16:31SS 16:45MS 18:19TE          6: 1TS          7:49SR  8:37MR 11:42VT 
12-26          16:32SS 17:36MS 18:19TE          6: 3TS          7:49SR  9:22MR 11:43VT 
12-27          16:32SS         18:21TE 18:31MS  6: 3TS          7:49SR 10: 0MR 11:31VT 
12-28          16:34SS         18:21TE 19:28MS  6: 3TS          7:49SR 10:33MR 10:34VT 
12-29          16:34SS         18:22TE 20:28MS  6: 3TS          7:49SR 11: 1MR  9:34VT 
12-30          16:36SS         18:22TE 21:31MS  6: 4TS          7:50SR 11:25MR  8:32VT 
12-31          16:37SS         18:23TE 22:32MS  6: 4TS          7:50SR 11:49MR  7:31VT

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.