Events for September 2015

The following table gives the date and time of important astronomical events for September 2015. 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 2015
------  -----  --------------------------------------------
        (h:m)
Sep 01  02     Neptune at Opposition 
Sep 04  10     Mercury at Greatest Elongation: 27.1°E
Sep 05  05:09  Aldebaran 0.6°S of Moon
Sep 05  09:54  LAST QUARTER MOON 
Sep 10  05:53  Venus 2.7°S of Moon
Sep 13  06:41  NEW MOON 
Sep 13  06:54  Partial Solar Eclipse; mag=0.788
Sep 14  04:38  Moon at Ascending Node 
Sep 14  11:28  Moon at Apogee: 406466 km
Sep 15  06:15  Mercury 5.3°S of Moon
Sep 16  00:00  Spica 4.3°S of Moon
Sep 19  02:54  Saturn 2.8°S of Moon
Sep 21  08:59  FIRST QUARTER MOON 
Sep 23  08:20  Autumnal Equinox 
Sep 24  19:38  Mars 0.7°N of Regulus
Sep 27  21:04  Moon at Descending Node 
Sep 28  01:46  Moon at Perigee: 356877 km
Sep 28  02:47  Total Lunar Eclipse; mag=1.276
Sep 28  02:50  FULL MOON 
Sep 30  15     Mercury at Inferior Conjunction 

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 2015 2016 2017 2018 2019 2020
Atlantic Standard Time 2015 2016 2017 2018 2019 2020
Eastern Standard Time 2015 2016 2017 2018 2019 2020
Central Standard Time 2015 2016 2017 2018 2019 2020
Mountain Standard Time 2015 2016 2017 2018 2019 2020
Pacific Standard Time 2015 2016 2017 2018 2019 2020
Alaska Standard Time 2015 2016 2017 2018 2019 2020
Hawaii Standard Time 2015 2016 2017 2018 2019 2020

For additional years, see Calendars of Astronomical Events.

For detailed information on solar and lunar eclipses this year, see: Eclipses During 2015.

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