2020 Calendar of Astronomical Events



2020 Phases of the Moon

Atlantic Standard Time

The following table gives the date and time of the Moon's phases for the year. If Daylight Saving Time is in effect, add one hour to the times listed.

2020 Phases of the Moon
Atlantic Standard Time
New Moon First Quarter Full Moon Last Quarter
- Jan 3 00:45 Jan 10 15:21 n Jan 17 08:58
Jan 24 17:42 Feb 1 21:42 Feb 9 03:33 Feb 15 18:17
Feb 23 11:32 Mar 2 15:57 Mar 9 13:48 Mar 16 05:34
Mar 24 05:28 Apr 1 06:21 Apr 7 22:35 Apr 14 18:56
Apr 22 22:26 Apr 30 16:38 May 7 06:45 May 14 10:03
May 22 13:39 May 29 23:30 Jun 5 15:12 n Jun 13 02:24
Jun 21 02:41 A Jun 28 04:16 Jul 5 00:44 n Jul 12 19:29
Jul 20 13:33 Jul 27 08:32 Aug 3 11:59 Aug 11 12:45
Aug 18 22:41 Aug 25 13:58 Sep 2 01:22 Sep 10 05:26
Sep 17 07:00 Sep 23 21:55 Oct 1 17:05 Oct 9 20:39
Oct 16 15:31 Oct 23 09:23 Oct 31 10:49 Nov 8 09:46
Nov 15 01:07 Nov 22 00:45 Nov 30 05:30 n Dec 7 20:37
Dec 14 12:17 T Dec 21 19:41 Dec 29 23:28 -

An eclipse of the Sun can only occur at New Moon (see: Solar Eclipses for Beginners), while an eclipse of the Moon can only occur at Full Moon (see: Lunar Eclipses for Beginners). In any calendar year there are a minimum of two solar and two lunar eclipses.

If an eclipse of the Sun or Moon takes place on a given date, it is noted by a character next to the date in the table above. Solar eclipses are indicated as: T=Total, A=Annular, H=Hybrid and P=Partial. Lunar eclipses are indicated as: t=Total, p=Partial, and n=Penumbral.

Phases of the Moon Photo Gallery is an image collection showing the Moon's phases over a complete synodic month.



2020 Calendar of Astronomical Events

Atlantic Standard Time

The following table gives the date and time of the important astronomical events for the year. If Daylight Saving Time is in effect, add one hour to the times listed. A key to astronomical terms appears below the calendar.

2020 Calendar of Astronomical Events
January - June July - December
Date     AST   Event
        (h:m)

Jan 01  21:30  Moon at Apogee: 404580 km
    03  00:45  FIRST QUARTER MOON 
    04  05     Quadrantid Meteor Shower
    05  04     Earth at Perihelion: 0.98324 AU
    07  17:09  Aldebaran 3.0°S of Moon
    09  19:29  Moon at Ascending Node 
    10  11     Mercury at Superior Conjunction 
    10  15:10  Pen. Lunar Eclipse; mag=0.896
    10  15:21  FULL MOON 
    10  22:26  Pollux 5.3°N of Moon
    11  19:54  Beehive 1.0°S of Moon
    13  07:37  Regulus 3.8°S of Moon
    13  10     Saturn in Conjunction with Sun 
    13  16:20  Moon at Perigee: 365964 km
    17  08:58  LAST QUARTER MOON 
    17  19:03  Mars 4.7°N of Antares
    20  15:13  Mars 2.3°S of Moon
    22  16:31  Moon at Descending Node 
    22  22:42  Jupiter 0.4°N of Moon: Occn.
    24  17:42  NEW MOON 
    28  03:29  Venus 4.1°N of Moon
    29  17:28  Moon at Apogee: 405390 km

Feb 01  21:42  FIRST QUARTER MOON 
    04  02:53  Aldebaran 3.1°S of Moon
    06  04:59  Moon at Ascending Node 
    07  08:58  Pollux 5.3°N of Moon
    08  06:16  Beehive 1.0°S of Moon
    09  03:33  FULL MOON 
    09  17:15  Regulus 3.8°S of Moon
    10  10     Mercury at Greatest Elong: 18.2°E
    10  16:31  Moon at Perigee: 360464 km
    12  01     Mercury at Perihelion 
    15  18:17  LAST QUARTER MOON 
    18  09:18  Mars 0.8°S of Moon: Occn.
    18  20:12  Moon at Descending Node 
    19  15:36  Jupiter 0.9°N of Moon: Occn.
    20  09:47  Saturn 1.7°N of Moon
    23  11:32  NEW MOON 
    25  22     Mercury at Inferior Conjunction 
    26  07:35  Moon at Apogee: 406277 km

Mar 02  11:16  Aldebaran 3.3°S of Moon
    02  15:57  FIRST QUARTER MOON 
    04  10:58  Moon at Ascending Node 
    05  19:26  Pollux 5.2°N of Moon
    06  17:08  Beehive 1.1°S of Moon
    08  04:23  Regulus 3.8°S of Moon
    08  08     Neptune in Conjunction with Sun 
    09  13:48  FULL MOON 
    10  02:33  Moon at Perigee: 357123 km
    16  05:34  LAST QUARTER MOON 
    16  21:00  Moon at Descending Node 
    18  04:19  Mars 0.7°N of Moon: Occn.
    18  06:18  Jupiter 1.5°N of Moon
    18  20:04  Saturn 2.1°N of Moon
    19  23:50  Vernal Equinox 
    20  00     Venus at Perihelion 
    21  13:48  Mercury 3.6°N of Moon
    23  22     Mercury at Greatest Elong: 27.8°W
    24  05:28  NEW MOON 
    24  11:23  Moon at Apogee: 406690 km
    24  18     Venus at Greatest Elong: 46.1°E
    27  01     Mercury at Aphelion 
    29  17:52  Aldebaran 3.6°S of Moon
    31  12:51  Moon at Ascending Node 

Apr 01  06:21  FIRST QUARTER MOON 
    02  03:59  Pollux 4.9°N of Moon
    03  02:25  Beehive 1.3°S of Moon
    03  10:36  Venus 0.3°S of Pleiades
    04  14:45  Regulus 3.9°S of Moon
    07  14:08  Moon at Perigee: 356909 km
    07  22:35  FULL MOON 
    12  22:58  Moon at Descending Node 
    14  18:56  LAST QUARTER MOON 
    14  19:04  Jupiter 2.0°N of Moon
    15  05:26  Saturn 2.5°N of Moon
    16  00:33  Mars 2.0°N of Moon
    20  15:01  Moon at Apogee: 406463 km
    22  02     Lyrid Meteor Shower
    22  22:26  NEW MOON 
    25  23:34  Aldebaran 3.8°S of Moon
    26  06     Uranus in Conjunction with Sun 
    27  13:54  Moon at Ascending Node 
    29  10:19  Pollux 4.7°N of Moon
    30  09:18  Beehive 1.6°S of Moon
    30  16:38  FIRST QUARTER MOON 

May 01  22:49  Regulus 4.2°S of Moon
    04  15     Eta-Aquarid Meteor Shower
    04  17     Mercury at Superior Conjunction 
    05  23:03  Moon at Perigee: 359656 km
    07  06:45  FULL MOON 
    08  17:40  Antares 6.5°S of Moon
    10  00     Mercury at Perihelion 
    10  05:01  Moon at Descending Node 
    12  05:40  Jupiter 2.3°N of Moon
    12  14:18  Saturn 2.7°N of Moon
    14  10:03  LAST QUARTER MOON 
    14  22:00  Mars 2.8°N of Moon
    18  03:45  Moon at Apogee: 405584 km
    22  06     Mercury 0.9° of Venus
    22  13:39  NEW MOON 
    23  22:40  Venus 3.7°N of Moon
    24  06:53  Mercury 2.8°N of Moon
    24  17:34  Moon at Ascending Node 
    26  15:43  Pollux 4.6°N of Moon
    27  14:44  Beehive 1.7°S of Moon
    29  04:44  Regulus 4.3°S of Moon
    29  23:30  FIRST QUARTER MOON 

Jun 02  23:36  Moon at Perigee: 364366 km
    03  14     Venus at Inferior Conjunction 
    04  09     Mercury at Greatest Elong: 23.6°E
    05  15:12  FULL MOON 
    05  15:25  Pen. Lunar Eclipse; mag=0.568
    06  14:10  Moon at Descending Node 
    08  13:19  Jupiter 2.2°N of Moon
    08  22:19  Saturn 2.7°N of Moon
    12  19:53  Mars 2.7°N of Moon
    13  02:24  LAST QUARTER MOON 
    14  20:56  Moon at Apogee: 404597 km
    19  04:52  Venus 0.7°S of Moon: Occn.
    20  17:43  Summer Solstice 
    21  00:24  Moon at Ascending Node 
    21  02:40  Annular Solar Eclipse; mag=0.994
    21  02:41  NEW MOON 
    22  21:53  Pollux 4.5°N of Moon
    23  20:33  Beehive 1.7°S of Moon
    25  10:09  Regulus 4.3°S of Moon
    28  04:16  FIRST QUARTER MOON 
    29  22:09  Moon at Perigee: 368958 km
    30  23     Mercury at Inferior Conjunction 

Date     AST   Event
        (h:m)

Jul 03  23:18  Moon at Descending Node 
    04  09     Earth at Aphelion: 1.01669 AU
    05  00:30  Pen. Lunar Eclipse; mag=0.355
    05  00:44  FULL MOON 
    05  17:37  Jupiter 1.9°N of Moon
    06  04:45  Saturn 2.5°N of Moon
    10  08     Venus at Aphelion 
    11  08:10  Venus 1.0°N of Aldebaran
    11  15:36  Mars 2.0°N of Moon
    12  15:27  Moon at Apogee: 404201 km
    12  19:29  LAST QUARTER MOON 
    14  03     Jupiter at Opposition 
    16  21:21  Aldebaran 3.8°S of Moon
    17  03:26  Venus 3.1°S of Moon
    18  08:33  Moon at Ascending Node 
    18  23:54  Mercury 3.9°S of Moon
    20  13:33  NEW MOON 
    20  18     Saturn at Opposition 
    22  11     Mercury at Greatest Elong: 20.1°W
    22  16:50  Regulus 4.3°S of Moon
    25  00:54  Moon at Perigee: 368367 km
    27  08:32  FIRST QUARTER MOON 
    27  17     Delta-Aquarid Meteor Shower
    31  05:32  Moon at Descending Node 

Aug 01  16:14  Mercury 6.6°S of Pollux
    01  19:30  Jupiter 1.5°N of Moon
    02  09:17  Saturn 2.3°N of Moon
    03  08     Mars at Perihelion 
    03  11:59  FULL MOON 
    06  00     Mercury at Perihelion 
    09  03:57  Mars 0.8°N of Moon: Occn.
    09  09:51  Moon at Apogee: 404658 km
    11  12:45  LAST QUARTER MOON 
    12  09     Perseid Meteor Shower
    12  21     Venus at Greatest Elong: 45.8°W
    13  06:06  Aldebaran 4.0°S of Moon
    14  15:22  Moon at Ascending Node 
    15  09:01  Venus 4.0°S of Moon
    16  15:10  Pollux 4.5°N of Moon
    17  11     Mercury at Superior Conjunction 
    18  22:41  NEW MOON 
    21  06:59  Moon at Perigee: 363513 km
    25  13:58  FIRST QUARTER MOON 
    26  00:04  Antares 6.2°S of Moon
    27  07:52  Moon at Descending Node 
    28  21:33  Jupiter 1.4°N of Moon
    29  12:40  Saturn 2.2°N of Moon

Sep 02  01:22  FULL MOON 
    06  00:42  Mars 0.0°S of Moon: Occn.
    06  02:31  Moon at Apogee: 405606 km
    09  14:12  Aldebaran 4.2°S of Moon
    10  05:26  LAST QUARTER MOON 
    10  19:05  Moon at Ascending Node 
    11  15     Neptune at Opposition 
    12  20:10  Venus 2.5°S of Beehive
    13  00:50  Pollux 4.3°N of Moon
    13  23:19  Beehive 1.8°S of Moon
    14  00:43  Venus 4.5°S of Moon
    15  11:51  Regulus 4.3°S of Moon
    17  07:00  NEW MOON 
    18  09:44  Moon at Perigee: 359081 km
    18  23     Mercury at Aphelion 
    22  02:06  Mercury 0.3°N of Spica
    22  06:27  Antares 6.0°S of Moon
    22  09:31  Autumnal Equinox 
    23  08:33  Moon at Descending Node 
    23  21:55  FIRST QUARTER MOON 
    25  02:46  Jupiter 1.6°N of Moon
    25  16:46  Saturn 2.3°N of Moon

Oct 01  12     Mercury at Greatest Elong: 25.8°E
    01  17:05  FULL MOON 
    02  13:09  Venus 0.1°S of Regulus
    02  23:21  Mars 0.7°N of Moon: Occn.
    03  13:22  Moon at Apogee: 406321 km
    06  21:02  Aldebaran 4.5°S of Moon
    07  20:29  Moon at Ascending Node 
    09  20:39  LAST QUARTER MOON 
    10  09:18  Pollux 4.1°N of Moon
    11  08:27  Beehive 2.1°S of Moon
    12  21:59  Regulus 4.5°S of Moon
    13  19     Mars at Opposition 
    13  19:57  Venus 4.3°S of Moon
    16  15:31  NEW MOON 
    16  19:46  Moon at Perigee: 356913 km
    19  15:12  Antares 5.7°S of Moon
    20  11:53  Moon at Descending Node 
    21  01     Orionid Meteor Shower
    22  13:10  Jupiter 2.0°N of Moon
    22  23:49  Saturn 2.6°N of Moon
    23  09:23  FIRST QUARTER MOON 
    25  14     Mercury at Inferior Conjunction 
    29  12:13  Mars 3.0°N of Moon
    30  14:46  Moon at Apogee: 406393 km
    30  17     Venus at Perihelion 
    31  10:49  FULL MOON 
    31  12     Uranus at Opposition 

Nov 01  23     Mercury at Perihelion 
    03  02:58  Aldebaran 4.6°S of Moon
    03  22:39  Moon at Ascending Node 
    05  02     S Taurid Meteor Shower
    06  15:52  Pollux 3.9°N of Moon
    07  15:34  Beehive 2.3°S of Moon
    08  09:46  LAST QUARTER MOON 
    09  06:20  Regulus 4.7°S of Moon
    10  13     Mercury at Greatest Elong: 19.1°W
    12  01     N Taurid Meteor Shower
    12  17:30  Venus 3.1°S of Moon
    13  16:45  Mercury 1.7°S of Moon
    14  07:48  Moon at Perigee: 357839 km
    15  01:07  NEW MOON 
    16  09:27  Venus 3.6°N of Spica
    16  20:07  Moon at Descending Node 
    17  07     Leonid Meteor Shower
    19  04:54  Jupiter 2.5°N of Moon
    19  10:57  Saturn 2.9°N of Moon
    22  00:45  FIRST QUARTER MOON 
    25  15:45  Mars 4.9°N of Moon
    26  20:29  Moon at Apogee: 405891 km
    30  05:30  FULL MOON 
    30  05:43  Pen. Lunar Eclipse; mag=0.829
    30  09:07  Aldebaran 4.6°S of Moon

Dec 01  03:46  Moon at Ascending Node 
    03  21:24  Pollux 3.8°N of Moon
    04  21:10  Beehive 2.4°S of Moon
    06  12:28  Regulus 4.8°S of Moon
    07  20:37  LAST QUARTER MOON 
    12  16:40  Venus 0.8°S of Moon: Occn.
    12  16:42  Moon at Perigee: 361777 km
    13  21     Geminid Meteor Shower
    14  07:03  Moon at Descending Node 
    14  12:13  Total Solar Eclipse; mag=1.025
    14  12:17  NEW MOON 
    17  00:28  Jupiter 2.9°N of Moon
    17  01:25  Saturn 3.1°N of Moon
    19  23     Mercury at Superior Conjunction 
    21  06:03  Winter Solstice 
    21  19:41  FIRST QUARTER MOON 
    22  05     Ursid Meteor Shower
    23  10:48  Venus 5.5°N of Antares
    23  14:30  Mars 5.6°N of Moon
    24  12:32  Moon at Apogee: 405010 km
    27  16:20  Aldebaran 4.6°S of Moon
    28  11:03  Moon at Ascending Node 
    29  23:28  FULL MOON 
    31  03:41  Pollux 3.8°N of Moon

    

Astronomical Definitions

  • Perihelion - the instant when a planet is closest to the Sun
  • Aphelion - the instant when a planet is furthest from the Sun
  • Perigee - the instant when the Moon is closest to Earth
  • Apogee - the instant when the Moon is furthest from Earth
  • Inferior Conjunction - the instant when a planet passes between Earth and the Sun (Mercury or Venus)
  • Superior Conjunction - the instant when a planet passes on the opposite side of the Sun from Earth (Mercury or Venus)
  • Greatest Elongation - elongation is the apparent angle between a planet and the Sun as seen from Earth; during eastern elongation (E), the planet appears as an evening star; during western elongation (W), the planet appears as a morning star
  • Opposition - the instant when a planet appears opposite the Sun as seen from Earth
  • Conjunction - the instant when a planet appears closest the Sun as seen from Earth
  • Occultation - the Moon occults or eclipses a star or planet
  • Ascending Node - the point where a planet crosses from the southern to northern portion of its orbit
  • Descending Node - the point where a planet crosses from the northern to the southern portion of its orbit



Calendars for Other Years and Time Zones

The table below contains links to astronomical events calendars for a range of years and Time Zones. Abbreviations for the time zones are: GMT = Greenwich Mean Time, AST = Atlantic Standard Time, EST = Eastern Standard Time, CST = Central Standard Time, MST = Mountain Standard Time, PST = Pacific Standard Time, AKST = Alaskan Standard Time, and HST = Hawaiian Standard Time.

Calendar of Astronomical Events
GMT 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025
AST 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025
EST 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025
CST 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025
MST 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025
PST 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025
AKST 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025
HST 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025

For years or time zones not covered above, please visit SKYCAL the astronomical events calendar generator.

Accuracy

The times of astronomical events listed with a precision in hours and minutes (i.e., hh:mm) are accurate to the nearest minute. Similarly, the times of astronomical events listed with a precision in hours (i.e., hh) are accurate to the nearest hour.

A simplified solar ephemeris results an accuracy of ±0.5 hours for the perihelion and aphelion of Earth. The algorithm used in the perihelion and aphelion of the other planets is based on unperturbed elliptical orbits. For Mars, the accuracy is about 2 hours. Due to mutual planetary perturbations, the times for Jupiter may be in error by several weeks, while Saturn's times may be in error by a month. The times for Uranus and Neptune may be in error by several months. In the future, we plan to develop algorithms to improve the computed times of perihelion and aphelion of the planets.

Acknowledgements

All calculations are by Fred Espenak, and he assumes full responsibility for their accuracy. Algorithms used in predicting the phases of the Moon, eclipses and other sky phenomena are based on Astronomical Algorithms by Jean Meeus (Willmann-Bell, Inc., Richmond, 1998).

Permission is freely granted to reproduce this data when accompanied by the acknowledgment:


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