Events for April 2018

The following table gives the date and time of important astronomical events for April 2018.

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 2018
------  -----  --------------------------------------------
        (h:m)
Apr 01  18     Mercury at Inferior Conjunction 
Apr 03  14:14  Jupiter 3.9°S of Moon
Apr 03  17     Saturn at Aphelion 
Apr 07  12:50  Saturn 1.9°S of Moon
Apr 07  18:15  Mars 3.1°S of Moon
Apr 08  05:32  Moon at Apogee: 404145 km
Apr 08  07:18  LAST QUARTER MOON 
Apr 10  08:09  Moon at Descending Node 
Apr 14  09:24  Mercury 3.9°N of Moon
Apr 16  01:57  NEW MOON 
Apr 17  19:29  Venus 5.4°N of Moon
Apr 18  15     Uranus in Conjunction with Sun 
Apr 19  04:45  Aldebaran 1.1°S of Moon
Apr 20  14:44  Moon at Perigee: 368713 km
Apr 22  18     Lyrid Meteor Shower
Apr 22  21:46  FIRST QUARTER MOON 
Apr 23  06:17  Beehive 1.9°N of Moon
Apr 23  12:19  Moon at Ascending Node 
Apr 24  16:47  Venus 3.4°S of Pleiades
Apr 24  19:39  Regulus 1.2°S of Moon
Apr 29  18     Mercury at Greatest Elongation: 27.0°W
Apr 30  00:58  FULL MOON 
Apr 30  17:16  Jupiter 3.8°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 2018 2019 2020 2021 2022 2023
Atlantic Standard Time 2018 2019 2020 2021 2022 2023
Eastern Standard Time 2018 2019 2020 2021 2022 2023
Central Standard Time 2018 2019 2020 2021 2022 2023
Mountain Standard Time 2018 2019 2020 2021 2022 2023
Pacific Standard Time 2018 2019 2020 2021 2022 2023
Alaska Standard Time 2018 2019 2020 2021 2022 2023
Hawaii Standard Time 2018 2019 2020 2021 2022 2023

For additional years, see Calendars of Astronomical Events.

For information on all solar and lunar eclipses this year, see: Eclipses During 2018.

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