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Pine Mountain Observatory Summer Research Workshop 2013
Dark Sky Observing Time PDT for July
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The dark sky table shows the Pacific Daylight Saving Time (PDT) times for sunset, astronomical twilight ends, astronomical twilight starts, sunrise, moonrise, moonset and total moon-free, twilight-free viewing time for Pine Mountain Observatory, Oregon, U.S.A. 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.
DARKSKY- Dave Heider 3/92 Site-PMO OR USA
Portland, Oregon, U.S.A. (Longitude: West 120.94 degrees & Latitude: North 43.79 degrees)
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
7- 1 15: 3MS 20:49SS 22:58TE 1:37MR 3:16TS 5:25SR 2:39VT
7- 2 16: 2MS 20:49SS 22:58TE 2:12MR 3:16TS 5:26SR 3:13VT
7- 3 17: 1MS 20:47SS 22:58TE 2:50MR 3:17TS 5:26SR 3:52VT
7- 4 17:55MS 20:47SS 22:57TE 3:19TS 3:32MR 5:28SR 4:21VT
7- 5 18:46MS 20:47SS 22:57TE 3:19TS 4:20MR 5:28SR 4:22VT
7- 6 19:31MS 20:46SS 22:55TE 3:20TS 5:11MR 5:28SR 4:25VT
7- 7 20:12MS 20:46SS 22:55TE 3:22TS 5:30SR 6: 7MR 4:26VT
7- 8 20:46SS 20:49MS 22:53TE 3:22TS 5:31SR 7: 4MR 4:29VT
7- 9 20:46SS 21:22MS 22:52TE 3:24TS 5:31SR 8: 3MR 4:31VT
7-10 20:46SS 21:51MS 22:52TE 3:25TS 5:31SR 9: 3MR 4:33VT
7-11 20:45SS 22:19MS 22:51TE 3:27TS 5:33SR 10: 4MR 4:35VT
7-12 20:43SS 22:46MS 22:49TE 3:28TS 5:34SR 11: 7MR 4:38VT
7-13 20:43SS 22:49TE 23:13MS 3:28TS 5:34SR 4:15VT
7-14 12:10MR 20:43SS 22:47TE 23:43MS 3:31TS 5:35SR 3:47VT
7-15 13:16MR 20:43SS 22:46TE 0:15MS 3:31TS 5:35SR 3:16VT
7-16 14:23MR 20:42SS 22:45TE 0:51MS 3:34TS 5:37SR 2:43VT
7-17 15:33MR 20:40SS 22:43TE 1:34MS 3:34TS 5:37SR 2: 0VT
7-18 16:40MR 20:40SS 22:43TE 2:25MS 3:37TS 5:39SR 1:12VT
7-19 17:47MR 20:38SS 22:40TE 3:25MS 3:37TS 5:40SR 0:12VT
7-20 18:46MR 20:38SS 22:40TE 3:40TS 4:34MS 5:40SR 0: 0VT
7-21 19:38MR 20:37SS 22:38TE 3:40TS 5:41SR 5:46MS 0: 0VT
7-22 20:23MR 20:37SS 22:37TE 3:43TS 5:43SR 7: 3MS 0: 0VT
7-23 20:36SS 21: 1MR 22:36TE 3:43TS 5:43SR 8:18MS 0: 0VT
7-24 20:34SS 21:36MR 22:34TE 3:46TS 5:45SR 9:30MS 0: 0VT
7-25 20:34SS 22: 7MR 22:32TE 3:46TS 5:46SR 10:40MS 0: 0VT
7-26 20:32SS 22:31TE 22:37MR 3:49TS 5:46SR 11:46MS 0: 6VT
7-27 20:31SS 22:28TE 23: 7MR 3:50TS 5:48SR 0:38VT
7-28 12:52MS 20:31SS 22:28TE 23:40MR 3:52TS 5:49SR 1:12VT
7-29 13:53MS 20:30SS 22:25TE 0:13MR 3:54TS 5:49SR 1:48VT
7-30 14:52MS 20:28SS 22:23TE 0:51MR 3:55TS 5:50SR 2:27VT
7-31 15:49MS 20:27SS 22:22TE 1:31MR 3:57TS 5:52SR 3: 9VT
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.
