Events for September 2017

The following table gives the date and time of important astronomical events for September 2017.

The time of each event is given in Greenwich Mean Time or GMT (a.k.a. Universal Time or UT). To convert GMT to Eastern Standard Time (EST) just subtract 5 hours. To convert GMT to other time zones, visit Time Zones. Some of the astronomical terms used in the calendar are explained in Definitions.

 Date    GMT   Astronomical Events for September 2017
------  -----  --------------------------------------------
        (h:m)
Sep 01  06:08  Venus 1.4°S of Beehive
Sep 04  18:41  Moon at Descending Node 
Sep 05  00     Mercury 3.2° of Mars
Sep 05  04     Neptune at Opposition 
Sep 06  07:03  FULL MOON 
Sep 10  05:30  Mercury 0.7°S of Regulus
Sep 10  21:44  Jupiter 2.9°N of Spica
Sep 12  10     Mercury at Greatest Elongation: 17.9°W
Sep 12  12:09  Aldebaran 0.4°S of Moon
Sep 13  06:25  LAST QUARTER MOON 
Sep 13  16:04  Moon at Perigee: 369856 km
Sep 15  12     Mercury at Perihelion 
Sep 16  14:50  Beehive 3.1°N of Moon
Sep 16  18     Mercury 0.1° of Mars
Sep 17  18:28  Moon at Ascending Node 
Sep 18  00:56  Venus 0.5°N of Moon: Occultation
Sep 18  04:32  Regulus 0.1°S of Moon
Sep 18  23:22  Mercury 0.0°N of Moon: Occultation
Sep 19  21:30  Venus 0.4°N of Regulus
Sep 20  05:30  NEW MOON 
Sep 22  07:51  Jupiter 3.7°S of Moon
Sep 22  20:02  Autumnal Equinox 
Sep 27  00:09  Saturn 3.5°S of Moon
Sep 27  06:49  Moon at Apogee: 404342 km
Sep 28  02:54  FIRST QUARTER MOON 

As the events above transpire, I will post photographs of some of them at Recent Images.

Astronomical events calendars for complete years and for eight time zones are available through the links below.

Time Zones Calendars of Astronomical Events
Greenwich Mean Time 2017 2018 2019 2020 2021 2022
Atlantic Standard Time 2017 2018 2019 2020 2021 2022
Eastern Standard Time 2017 2018 2019 2020 2021 2022
Central Standard Time 2017 2018 2019 2020 2021 2022
Mountain Standard Time 2017 2018 2019 2020 2021 2022
Pacific Standard Time 2017 2018 2019 2020 2021 2022
Alaska Standard Time 2017 2018 2019 2020 2021 2022
Hawaii Standard Time 2017 2018 2019 2020 2021 2022

For additional years, see Calendars of Astronomical Events.

The astronomical highlight of 2017 is the Great American Total Solar Eclipse on August 21. This is the first total eclipse visible from the continental USA in 38 years. For complete details on this highly anticipated event, see: 2017 Total Solar Eclipse (EclipseWise.com).

For information on all solar and lunar eclipses this year, see: Eclipses During 2017.

The Calendars of Astronomical Events were all generated by a computer program I wrote (with THINK Pascal running on a Macintosh G4) using Astronomical Algorithms (Jean Meeus).

Fred Espenak



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