Astronomical highlights for the week

Weather
  • Black Supermoon: the new Moon of July 31 is the second of the month (last was on Jul 2), it is also close enough to perigee (the closest point in its orbit to Earth, Aug 2 02:08Z, 359398 km/223320 miles) to be a Supermoon. See tweet suggestion below with 2 images from NASA.
  • Aug 1: The ELaNa-20 mission plans to air-launch cubesats aboard a LauncherOne rocket released from a 747 off the California coast.
  • Aug 3 6:50 pm EDT: SpaceX plans the launch of the Amos17 comms satellite from Florida
  • Meteor showers in the coming week, basically don’t make a big deal out of these with your audience.
    • The Southern Delta Aquariid and alpha Capricornid meteor showers are expected to peak over the weekend but are minor showers with no more than 1 or 2 meteors per hour expected under the best conditions.
    • The Perseids are technically underway though this meteor shower does not peak until the night of Aug 12, under a nearly full moon.
  • So why wasn’t Asteroid 2019 OK that passed by Earth at 0.19 lunar distance (~46k miles) on Jul 25, not on last week’s email in the Near Earth Object section? The 57 to 130 meters wide (187 to 427 feet) wide space rock wasn’t discovered until earlier this week. Its orbit doesn’t bring it close enough for this smaller asteroid to be detectable very often.
  • Wed Jul 31 23:11:53: new moon
  • Wed Aug 07 13:30:55: first quarter moon

On This Day

  • July 28, 1964: Ranger 7 launches for an intentional crash landing on the Moon
  • July 29, 2003: The Spitzer Space Telescope launches to study asteroids, dust-covered stars, and distant galaxies.

Super Black Moon

July 31

Some are calling the new moon pm July 31st a “Black Super Moon” because it is the second of July (Black Moon) and it falls near the nearest point in its orbit (Super Moon). Look for during the evening, in sunlight reflected from Earth.
or

Near Earth Objects (NEO)

lunar distance (LD) is the mean distance to the moon ~239k miles. Anything within 1 LD is newsworthy. For more information see NASA’s Center for Near Earth Object Studies

This week

object close approach date uncertainty LD million
miles
2010 PK9 2019-07-26 15:04Z < 1 sec 8.2 ~2
2019 NT1 2019-07-27 22:10Z ~1 hour 19.0 ~5
2019 NN4 2019-07-29 01:22Z < 1 sec 6.6 ~2
2019 ON 2019-08-01 11:23Z ~1 hour 6.7 ~2

Closest

within object close approach date uncertainty lunar distances million
miles
~14 days 2019 NN4 2019-07-29 01:22Z < 1 sec 6.6 ~2
~1 year 2017 MF7 2020-06-14 13:10Z ~4.55 days 3.7 <1
~100 years 2010 RF12 2095-09-05 23:53Z ~16 hours 0.0 1,098+ miles

Planet visibility

body (phase) rise transit (alt) set constellation
Mercury (9%) 05:24:40 12:27:03 (67??) 19:30:00 Gemini
Venus (99%) 05:44:37 13:03:22 (70??) 20:21:30 Cancer
Moon (6%) 03:18:00 10:54:24 (71??) 18:33:55 Gemini
Mars 07:04:59 14:07:06 (66??) 21:10:56 Cancer
Saturn 19:10:57 23:56:08 (27??) 04:37:07 Sagittarius
Jupiter 16:56:38 21:42:09 (27??) 02:23:33 Ophiuchus

Sample rise/set times for 07/29/19

Satellite Passes

This information is best used to identify passes worth sharing or skipping. Those nearest overhead are closest, brightest, and longest. Check dates and times for each pass before your share.

International Space Station (ISS)

  • below trees pass begins Fri 2019-07-26 21:33:32 EDT from the NNW (330°) reaches 12°, lasts 3 minutes
  • below trees pass begins Sun 2019-07-28 21:31:58 EDT from the NNW (337°) reaches 13°, lasts 3 minutes
  • below trees pass begins Tue 2019-07-30 21:29:49 EDT from the NNW (333°) reaches 17°, lasts 4 minutes
  • poor pass begins Thu 2019-08-01 21:27:33 EDT from the NW (325°) reaches 26°, enters Earth’s shadow 11° above the horizon 5 minutes later
  • good pass begins Sat 2019-08-03 21:25:20 EDT from the NW (313°) reaches 56°, enters Earth’s shadow 18° above the horizon 5 minutes later

Starlink (SpaceX)

The info below can and will change as these satellites are moved into their final orbits. Use the Heavens Above link below for up to date predictions

  • pass exits Earth’s shadow 23° above the horizon Sat 2019-07-27 00:24:56 EDT from the NE (35°) reaches 23°, lasts 1 minutes
  • pass exits Earth’s shadow 12° above the horizon Sat 2019-07-27 02:00:31 EDT from the NW (307°) reaches 18°, lasts 5 minutes
  • pass begins Sat 2019-07-27 03:41:17 EDT from the NNW (330°) reaches 15°, lasts 4 minutes
  • pass begins Sat 2019-07-27 05:20:37 EDT from the NW (323°) reaches 32°, lasts 7 minutes
  • pass exits Earth’s shadow 31° above the horizon Sun 2019-07-28 00:18:33 EDT from the NNE (14°) reaches 31°, lasts 2 minutes
  • pass begins Sun 2019-07-28 01:54:59 EDT from the NW (308°) reaches 16°, lasts 5 minutes
  • pass begins Sun 2019-07-28 03:35:56 EDT from the NNW (331°) reaches 16°, lasts 5 minutes
  • pass begins Sun 2019-07-28 05:15:09 EDT from the NW (320°) reaches 40°, lasts 7 minutes
  • pass begins Sun 2019-07-28 22:35:35 EDT from the ENE (66°) reaches 13°, lasts 35 seconds
  • pass exits Earth’s shadow 30° above the horizon Mon 2019-07-29 00:10:59 EDT from the NW (305°) reaches 33°, lasts 4 minutes
  • pass begins Mon 2019-07-29 01:49:58 EDT from the NW (315°) reaches 15°, lasts 5 minutes
  • pass begins Mon 2019-07-29 03:30:31 EDT from the NNW (331°) reaches 18°, lasts 5 minutes
  • pass begins Mon 2019-07-29 05:09:40 EDT from the NW (317°) reaches 51°, lasts 8 minutes
  • pass begins Mon 2019-07-29 22:22:41 EDT from the SW (216°) reaches 59°, lasts 8 minutes
  • pass begins Tue 2019-07-30 00:02:59 EDT from the W (275°) reaches 28°, lasts 7 minutes
  • pass begins Tue 2019-07-30 01:44:54 EDT from the NW (321°) reaches 15°, lasts 4 minutes
  • pass begins Tue 2019-07-30 03:25:05 EDT from the NNW (330°) reaches 20°, lasts 6 minutes
  • pass begins Tue 2019-07-30 05:04:14 EDT from the NW (313°) reaches 68°, lasts 8 minutes
  • pass begins Tue 2019-07-30 22:17:11 EDT from the SW (226°) reaches 82°, lasts 8 minutes
  • pass begins Tue 2019-07-30 23:57:55 EDT from the WNW (283°) reaches 24°, lasts 6 minutes
  • pass begins Wed 2019-07-31 01:39:46 EDT from the NW (325°) reaches 14°, lasts 4 minutes
  • pass begins Wed 2019-07-31 03:19:37 EDT from the NNW (328°) reaches 22°, lasts 6 minutes
  • pass begins Wed 2019-07-31 04:58:48 EDT from the NW (309°) reaches 90°, lasts 8 minutes
  • pass begins Wed 2019-07-31 22:11:46 EDT from the SW (236°) reaches 75°, lasts 8 minutes
  • pass begins Wed 2019-07-31 23:52:54 EDT from the WNW (292°) reaches 20°, lasts 6 minutes
  • pass begins Thu 2019-08-01 01:34:35 EDT from the NNW (328°) reaches 15°, lasts 4 minutes
  • pass begins Thu 2019-08-01 03:14:08 EDT from the NW (326°) reaches 26°, lasts 7 minutes
  • pass begins Thu 2019-08-01 04:53:25 EDT from the NW (304°) reaches 66°, lasts 8 minutes
  • pass begins Thu 2019-08-01 22:06:27 EDT from the WSW (246°) reaches 56°, lasts 8 minutes
  • pass begins Thu 2019-08-01 23:47:54 EDT from the WNW (300°) reaches 18°, lasts 5 minutes
  • pass begins Fri 2019-08-02 01:29:17 EDT from the NNW (330°) reaches 15°, lasts 4 minutes
  • pass begins Fri 2019-08-02 03:08:38 EDT from the NW (323°) reaches 31°, lasts 7 minutes
  • pass begins Fri 2019-08-02 04:48:06 EDT from the WNW (299°) reaches 47°, lasts 8 minutes
  • pass begins Fri 2019-08-02 22:01:12 EDT from the WSW (255°) reaches 43°, lasts 8 minutes
  • pass begins Fri 2019-08-02 23:42:54 EDT from the NW (307°) reaches 17°, lasts 5 minutes
  • pass begins Sat 2019-08-03 01:23:56 EDT from the NNW (331°) reaches 16°, lasts 5 minutes
  • pass begins Sat 2019-08-03 03:03:09 EDT from the NW (321°) reaches 38°, lasts 7 minutes
  • pass begins Sat 2019-08-03 04:42:50 EDT from the WNW (293°) reaches 34°, lasts 7 minutes
  • pass begins Sat 2019-08-03 21:56:02 EDT from the W (264°) reaches 35°, lasts 7 minutes
  • pass begins Sat 2019-08-03 23:37:54 EDT from the NW (314°) reaches 15°, lasts 5 minutes
  • pass begins Sun 2019-08-04 01:18:32 EDT from the NNW (331°) reaches 17°, enters Earth’s shadow 11° above the horizon 5 minutes later
  • pass begins Sun 2019-08-04 02:57:41 EDT from the NW (317°) reaches 24°, enters Earth’s shadow 24° above the horizon 1 minutes later
  • pass begins Sun 2019-08-04 21:50:55 EDT from the W (273°) reaches 28°, lasts 7 minutes
  • pass begins Sun 2019-08-04 23:32:51 EDT from the NW (320°) reaches 15°, lasts 4 minutes
  • pass begins Mon 2019-08-05 01:13:05 EDT from the NNW (330°) reaches 19°, enters Earth’s shadow 19° above the horizon 3 minutes later

Atmospheric drag and other factors can and does cause orbits to change. See the European Space Agency supported Heavens Above for the latest pass predictions. Satellite pass gradings are based on altitude reached and duration of the pass. Higher altitude passes are closer to the observer and generally brighter as a result. Satellites other than ISS are much more difficult to spot.

Moon Phases

date phase
Wed 2019-07-31 23:11:53 new
Wed 2019-08-07 13:30:55 first quarter
Thu 2019-08-15 08:29:13 full
Fri 2019-08-23 10:56:04 last quarter

Sun

Sunrise/set

Date Rise Solar noon (alt) Set sunlight
Mon 2019-07-29 06:08 13:20 (68.21??) 20:32 14 hrs 23 min
Tue 2019-07-30 06:09 13:20 (67.97??) 20:31 14 hrs 21 min
Wed 2019-07-31 06:10 13:20 (67.73??) 20:30 14 hrs 19 min
Thu 2019-08-01 06:11 13:20 (67.48??) 20:29 14 hrs 17 min
Fri 2019-08-02 06:12 13:20 (67.22??) 20:28 14 hrs 15 min
Sat 2019-08-03 06:13 13:20 (66.96??) 20:27 14 hrs 13 min
Sun 2019-08-04 06:14 13:20 (66.70??) 20:25 14 hrs 11 min
Mon 2019-08-05 06:15 13:20 (66.43??) 20:24 14 hrs 9 min
Tue 2019-08-06 06:16 13:20 (66.16??) 20:23 14 hrs 7 min
Wed 2019-08-07 06:16 13:19 (65.88??) 20:22 14 hrs 5 min
  • lost 0:18:31 (hh:mm:ss) of daylight over this period
  • daylight (HH:MM): 14:14
  • mean: sunrise 06:13 sunset 20:27
  • max: sun angle 68.21??

Twilight

date rise set
Mon 2019-07-29 04:14 22:26
Tue 2019-07-30 04:15 22:25
Wed 2019-07-31 04:17 22:23
Thu 2019-08-01 04:18 22:21
Fri 2019-08-02 04:20 22:20
Sat 2019-08-03 04:21 22:18
Sun 2019-08-04 04:23 22:16
Mon 2019-08-05 04:24 22:15
Tue 2019-08-06 04:26 22:13
Wed 2019-08-07 04:27 22:11

Copyright 2019 Nexstar Broadcasting, Inc. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.

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