Events for April 2017

The following table gives the date and time of important astronomical events for April 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 April 2017
------  -----  --------------------------------------------
        (h:m)
Apr 01  08:50  Aldebaran 0.3°S of Moon
Apr 01  10     Mercury at Greatest Elongation: 19.0°E
Apr 03  18:39  FIRST QUARTER MOON 
Apr 05  12:45  Beehive 3.8°N of Moon
Apr 07  04:30  Regulus 0.7°N of Moon
Apr 07  09:14  Moon at Ascending Node 
Apr 07  21     Jupiter at Opposition 
Apr 10  21:20  Jupiter 2.2°S of Moon
Apr 11  06:08  FULL MOON 
Apr 14  06     Uranus in Conjunction with Sun 
Apr 15  10:05  Moon at Apogee: 405478 km
Apr 16  18:39  Saturn 3.2°S of Moon
Apr 19  09:57  LAST QUARTER MOON 
Apr 20  06     Mercury at Inferior Conjunction 
Apr 21  08:16  Mars 3.4°S of Pleiades
Apr 21  22:30  Moon at Descending Node 
Apr 22  12     Lyrid Meteor Shower
Apr 23  17:59  Venus 5.2°N of Moon
Apr 26  12:16  NEW MOON 
Apr 27  16:18  Moon at Perigee: 359325 km
Apr 28  17:19  Aldebaran 0.5°S of 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