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