Events for October 2017

The following table gives the date and time of important astronomical events for October 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 October 2017
------  -----  --------------------------------------------
        (h:m)
Oct 02  02:05  Moon at Descending Node 
Oct 03  09     Venus at Perihelion 
Oct 05  18:40  FULL MOON 
Oct 08  00     Mars at Aphelion 
Oct 08  21     Mercury at Superior Conjunction 
Oct 09  05:51  Moon at Perigee: 366858 km
Oct 09  18:05  Aldebaran 0.6°S of Moon
Oct 12  12:25  LAST QUARTER MOON 
Oct 13  20:29  Beehive 3.0°N of Moon
Oct 14  22:10  Moon at Ascending Node 
Oct 15  10:54  Regulus 0.2°S of Moon
Oct 17  10:04  Mars 1.8°S of Moon
Oct 18  00:21  Venus 2.0°S of Moon
Oct 19  17     Uranus at Opposition 
Oct 19  19:12  NEW MOON 
Oct 21  11     Orionid Meteor Shower
Oct 24  11:54  Saturn 3.3°S of Moon
Oct 25  02:25  Moon at Apogee: 405151 km
Oct 26  18     Jupiter in Conjunction with Sun 
Oct 27  22:22  FIRST QUARTER MOON 
Oct 29  06:41  Moon at Descending Node 

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