2020 Calendar of Astronomical Events




    


2020 Phases of the Moon

Pacific 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
Pacific Standard Time
New Moon First Quarter Full Moon Last Quarter
- Jan 2 20:45 Jan 10 11:21 n Jan 17 04:58
Jan 24 13:42 Feb 1 17:42 Feb 8 23:33 Feb 15 14:17
Feb 23 07:32 Mar 2 11:57 Mar 9 09:48 Mar 16 01:34
Mar 24 01:28 Apr 1 02:21 Apr 7 18:35 Apr 14 14:56
Apr 22 18:26 Apr 30 12:38 May 7 02:45 May 14 06:03
May 22 09:39 May 29 19:30 Jun 5 11:12 n Jun 12 22:24
Jun 20 22:41 A Jun 28 00:16 Jul 4 20:44 n Jul 12 15:29
Jul 20 09:33 Jul 27 04:32 Aug 3 07:59 Aug 11 08:45
Aug 18 18:41 Aug 25 09:58 Sep 1 21:22 Sep 10 01:26
Sep 17 03:00 Sep 23 17:55 Oct 1 13:05 Oct 9 16:39
Oct 16 11:31 Oct 23 05:23 Oct 31 06:49 Nov 8 05:46
Nov 14 21:07 Nov 21 20:45 Nov 30 01:30 n Dec 7 16:37
Dec 14 08:17 T Dec 21 15:41 Dec 29 19:28 -

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

Pacific 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     PST   Event
        (h:m)

Jan 01  17:30  Moon at Apogee: 404580 km
    02  20:45  FIRST QUARTER MOON 
    04  01     Quadrantid Meteor Shower
    05  00     Earth at Perihelion: 0.98324 AU
    07  13:09  Aldebaran 3.0°S of Moon
    09  15:29  Moon at Ascending Node 
    10  07     Mercury at Superior Conjunction 
    10  11:10  Pen. Lunar Eclipse; mag=0.896
    10  11:21  FULL MOON 
    10  18:26  Pollux 5.3°N of Moon
    11  15:54  Beehive 1.0°S of Moon
    13  03:37  Regulus 3.8°S of Moon
    13  06     Saturn in Conjunction with Sun 
    13  12:20  Moon at Perigee: 365964 km
    17  04:58  LAST QUARTER MOON 
    17  15:03  Mars 4.7°N of Antares
    20  11:13  Mars 2.3°S of Moon
    22  12:31  Moon at Descending Node 
    22  18:42  Jupiter 0.4°N of Moon: Occn.
    24  13:42  NEW MOON 
    27  23:29  Venus 4.1°N of Moon
    29  13:28  Moon at Apogee: 405390 km

Feb 01  17:42  FIRST QUARTER MOON 
    03  22:53  Aldebaran 3.1°S of Moon
    06  00:59  Moon at Ascending Node 
    07  04:58  Pollux 5.3°N of Moon
    08  02:16  Beehive 1.0°S of Moon
    08  23:33  FULL MOON 
    09  13:15  Regulus 3.8°S of Moon
    10  06     Mercury at Greatest Elong: 18.2°E
    10  12:31  Moon at Perigee: 360464 km
    11  21     Mercury at Perihelion 
    15  14:17  LAST QUARTER MOON 
    18  05:18  Mars 0.8°S of Moon: Occn.
    18  16:12  Moon at Descending Node 
    19  11:36  Jupiter 0.9°N of Moon: Occn.
    20  05:47  Saturn 1.7°N of Moon
    23  07:32  NEW MOON 
    25  18     Mercury at Inferior Conjunction 
    26  03:35  Moon at Apogee: 406277 km

Mar 02  07:16  Aldebaran 3.3°S of Moon
    02  11:57  FIRST QUARTER MOON 
    04  06:58  Moon at Ascending Node 
    05  15:26  Pollux 5.2°N of Moon
    06  13:08  Beehive 1.1°S of Moon
    08  00:23  Regulus 3.8°S of Moon
    08  04     Neptune in Conjunction with Sun 
    09  09:48  FULL MOON 
    09  22:33  Moon at Perigee: 357123 km
    16  01:34  LAST QUARTER MOON 
    16  17:00  Moon at Descending Node 
    18  00:19  Mars 0.7°N of Moon: Occn.
    18  02:18  Jupiter 1.5°N of Moon
    18  16:04  Saturn 2.1°N of Moon
    19  19:50  Vernal Equinox 
    19  20     Venus at Perihelion 
    21  09:48  Mercury 3.6°N of Moon
    23  18     Mercury at Greatest Elong: 27.8°W
    24  01:28  NEW MOON 
    24  07:23  Moon at Apogee: 406690 km
    24  14     Venus at Greatest Elong: 46.1°E
    26  21     Mercury at Aphelion 
    29  13:52  Aldebaran 3.6°S of Moon
    31  08:51  Moon at Ascending Node 

Apr 01  02:21  FIRST QUARTER MOON 
    01  23:59  Pollux 4.9°N of Moon
    02  22:25  Beehive 1.3°S of Moon
    03  06:36  Venus 0.3°S of Pleiades
    04  10:45  Regulus 3.9°S of Moon
    07  10:08  Moon at Perigee: 356909 km
    07  18:35  FULL MOON 
    12  18:58  Moon at Descending Node 
    14  14:56  LAST QUARTER MOON 
    14  15:04  Jupiter 2.0°N of Moon
    15  01:26  Saturn 2.5°N of Moon
    15  20:33  Mars 2.0°N of Moon
    20  11:01  Moon at Apogee: 406463 km
    21  22     Lyrid Meteor Shower
    22  18:26  NEW MOON 
    25  19:34  Aldebaran 3.8°S of Moon
    26  02     Uranus in Conjunction with Sun 
    27  09:54  Moon at Ascending Node 
    29  06:19  Pollux 4.7°N of Moon
    30  05:18  Beehive 1.6°S of Moon
    30  12:38  FIRST QUARTER MOON 

May 01  18:49  Regulus 4.2°S of Moon
    04  11     Eta-Aquarid Meteor Shower
    04  13     Mercury at Superior Conjunction 
    05  19:03  Moon at Perigee: 359656 km
    07  02:45  FULL MOON 
    08  13:40  Antares 6.5°S of Moon
    09  20     Mercury at Perihelion 
    10  01:01  Moon at Descending Node 
    12  01:40  Jupiter 2.3°N of Moon
    12  10:18  Saturn 2.7°N of Moon
    14  06:03  LAST QUARTER MOON 
    14  18:00  Mars 2.8°N of Moon
    17  23:45  Moon at Apogee: 405584 km
    22  02     Mercury 0.9° of Venus
    22  09:39  NEW MOON 
    23  18:40  Venus 3.7°N of Moon
    24  02:53  Mercury 2.8°N of Moon
    24  13:34  Moon at Ascending Node 
    26  11:43  Pollux 4.6°N of Moon
    27  10:44  Beehive 1.7°S of Moon
    29  00:44  Regulus 4.3°S of Moon
    29  19:30  FIRST QUARTER MOON 

Jun 02  19:36  Moon at Perigee: 364366 km
    03  10     Venus at Inferior Conjunction 
    04  05     Mercury at Greatest Elong: 23.6°E
    05  11:12  FULL MOON 
    05  11:25  Pen. Lunar Eclipse; mag=0.568
    06  10:10  Moon at Descending Node 
    08  09:19  Jupiter 2.2°N of Moon
    08  18:19  Saturn 2.7°N of Moon
    12  15:53  Mars 2.7°N of Moon
    12  22:24  LAST QUARTER MOON 
    14  16:56  Moon at Apogee: 404597 km
    19  00:52  Venus 0.7°S of Moon: Occn.
    20  13:43  Summer Solstice 
    20  20:24  Moon at Ascending Node 
    20  22:40  Annular Solar Eclipse; mag=0.994
    20  22:41  NEW MOON 
    22  17:53  Pollux 4.5°N of Moon
    23  16:33  Beehive 1.7°S of Moon
    25  06:09  Regulus 4.3°S of Moon
    28  00:16  FIRST QUARTER MOON 
    29  18:09  Moon at Perigee: 368958 km
    30  19     Mercury at Inferior Conjunction 

Date     PST   Event
        (h:m)

Jul 03  19:18  Moon at Descending Node 
    04  05     Earth at Aphelion: 1.01669 AU
    04  20:30  Pen. Lunar Eclipse; mag=0.355
    04  20:44  FULL MOON 
    05  13:37  Jupiter 1.9°N of Moon
    06  00:45  Saturn 2.5°N of Moon
    10  04     Venus at Aphelion 
    11  04:10  Venus 1.0°N of Aldebaran
    11  11:36  Mars 2.0°N of Moon
    12  11:27  Moon at Apogee: 404201 km
    12  15:29  LAST QUARTER MOON 
    13  23     Jupiter at Opposition 
    16  17:21  Aldebaran 3.8°S of Moon
    16  23:26  Venus 3.1°S of Moon
    18  04:33  Moon at Ascending Node 
    18  19:54  Mercury 3.9°S of Moon
    20  09:33  NEW MOON 
    20  14     Saturn at Opposition 
    22  07     Mercury at Greatest Elong: 20.1°W
    22  12:50  Regulus 4.3°S of Moon
    24  20:54  Moon at Perigee: 368367 km
    27  04:32  FIRST QUARTER MOON 
    27  13     Delta-Aquarid Meteor Shower
    31  01:32  Moon at Descending Node 

Aug 01  12:14  Mercury 6.6°S of Pollux
    01  15:30  Jupiter 1.5°N of Moon
    02  05:17  Saturn 2.3°N of Moon
    03  04     Mars at Perihelion 
    03  07:59  FULL MOON 
    05  20     Mercury at Perihelion 
    08  23:57  Mars 0.8°N of Moon: Occn.
    09  05:51  Moon at Apogee: 404658 km
    11  08:45  LAST QUARTER MOON 
    12  05     Perseid Meteor Shower
    12  17     Venus at Greatest Elong: 45.8°W
    13  02:06  Aldebaran 4.0°S of Moon
    14  11:22  Moon at Ascending Node 
    15  05:01  Venus 4.0°S of Moon
    16  11:10  Pollux 4.5°N of Moon
    17  07     Mercury at Superior Conjunction 
    18  18:41  NEW MOON 
    21  02:59  Moon at Perigee: 363513 km
    25  09:58  FIRST QUARTER MOON 
    25  20:04  Antares 6.2°S of Moon
    27  03:52  Moon at Descending Node 
    28  17:33  Jupiter 1.4°N of Moon
    29  08:40  Saturn 2.2°N of Moon

Sep 01  21:22  FULL MOON 
    05  20:42  Mars 0.0°S of Moon: Occn.
    05  22:31  Moon at Apogee: 405606 km
    09  10:12  Aldebaran 4.2°S of Moon
    10  01:26  LAST QUARTER MOON 
    10  15:05  Moon at Ascending Node 
    11  11     Neptune at Opposition 
    12  16:10  Venus 2.5°S of Beehive
    12  20:50  Pollux 4.3°N of Moon
    13  19:19  Beehive 1.8°S of Moon
    13  20:43  Venus 4.5°S of Moon
    15  07:51  Regulus 4.3°S of Moon
    17  03:00  NEW MOON 
    18  05:44  Moon at Perigee: 359081 km
    18  19     Mercury at Aphelion 
    21  22:06  Mercury 0.3°N of Spica
    22  02:27  Antares 6.0°S of Moon
    22  05:31  Autumnal Equinox 
    23  04:33  Moon at Descending Node 
    23  17:55  FIRST QUARTER MOON 
    24  22:46  Jupiter 1.6°N of Moon
    25  12:46  Saturn 2.3°N of Moon

Oct 01  08     Mercury at Greatest Elong: 25.8°E
    01  13:05  FULL MOON 
    02  09:09  Venus 0.1°S of Regulus
    02  19:21  Mars 0.7°N of Moon: Occn.
    03  09:22  Moon at Apogee: 406321 km
    06  17:02  Aldebaran 4.5°S of Moon
    07  16:29  Moon at Ascending Node 
    09  16:39  LAST QUARTER MOON 
    10  05:18  Pollux 4.1°N of Moon
    11  04:27  Beehive 2.1°S of Moon
    12  17:59  Regulus 4.5°S of Moon
    13  15     Mars at Opposition 
    13  15:57  Venus 4.3°S of Moon
    16  11:31  NEW MOON 
    16  15:46  Moon at Perigee: 356913 km
    19  11:12  Antares 5.7°S of Moon
    20  07:53  Moon at Descending Node 
    20  21     Orionid Meteor Shower
    22  09:10  Jupiter 2.0°N of Moon
    22  19:49  Saturn 2.6°N of Moon
    23  05:23  FIRST QUARTER MOON 
    25  10     Mercury at Inferior Conjunction 
    29  08:13  Mars 3.0°N of Moon
    30  10:46  Moon at Apogee: 406393 km
    30  13     Venus at Perihelion 
    31  06:49  FULL MOON 
    31  08     Uranus at Opposition 

Nov 01  19     Mercury at Perihelion 
    02  22:58  Aldebaran 4.6°S of Moon
    03  18:39  Moon at Ascending Node 
    04  22     S Taurid Meteor Shower
    06  11:52  Pollux 3.9°N of Moon
    07  11:34  Beehive 2.3°S of Moon
    08  05:46  LAST QUARTER MOON 
    09  02:20  Regulus 4.7°S of Moon
    10  09     Mercury at Greatest Elong: 19.1°W
    11  21     N Taurid Meteor Shower
    12  13:30  Venus 3.1°S of Moon
    13  12:45  Mercury 1.7°S of Moon
    14  03:48  Moon at Perigee: 357839 km
    14  21:07  NEW MOON 
    16  05:27  Venus 3.6°N of Spica
    16  16:07  Moon at Descending Node 
    17  03     Leonid Meteor Shower
    19  00:54  Jupiter 2.5°N of Moon
    19  06:57  Saturn 2.9°N of Moon
    21  20:45  FIRST QUARTER MOON 
    25  11:45  Mars 4.9°N of Moon
    26  16:29  Moon at Apogee: 405891 km
    30  01:30  FULL MOON 
    30  01:43  Pen. Lunar Eclipse; mag=0.829
    30  05:07  Aldebaran 4.6°S of Moon
    30  23:46  Moon at Ascending Node 

Dec 03  17:24  Pollux 3.8°N of Moon
    04  17:10  Beehive 2.4°S of Moon
    06  08:28  Regulus 4.8°S of Moon
    07  16:37  LAST QUARTER MOON 
    12  12:40  Venus 0.8°S of Moon: Occn.
    12  12:42  Moon at Perigee: 361777 km
    13  17     Geminid Meteor Shower
    14  03:03  Moon at Descending Node 
    14  08:13  Total Solar Eclipse; mag=1.025
    14  08:17  NEW MOON 
    16  20:28  Jupiter 2.9°N of Moon
    16  21:25  Saturn 3.1°N of Moon
    19  19     Mercury at Superior Conjunction 
    21  02:03  Winter Solstice 
    21  15:41  FIRST QUARTER MOON 
    22  01     Ursid Meteor Shower
    23  06:48  Venus 5.5°N of Antares
    23  10:30  Mars 5.6°N of Moon
    24  08:32  Moon at Apogee: 405010 km
    27  12:20  Aldebaran 4.6°S of Moon
    28  07:03  Moon at Ascending Node 
    29  19:28  FULL MOON 
    30  23:41  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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