2020 Calendar of Astronomical Events




    


2020 Phases of the Moon

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

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

Alaska 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     AKST   Even
        (h:m)

Jan 01  16:30  Moon at Apogee: 404580 km
    02  19:45  FIRST QUARTER MOON 
    04  00     Quadrantid Meteor Shower
    04  23     Earth at Perihelion: 0.98324 AU
    07  12:09  Aldebaran 3.0°S of Moon
    09  14:29  Moon at Ascending Node 
    10  06     Mercury at Superior Conjunction 
    10  10:10  Pen. Lunar Eclipse; mag=0.896
    10  10:21  FULL MOON 
    10  17:26  Pollux 5.3°N of Moon
    11  14:54  Beehive 1.0°S of Moon
    13  02:37  Regulus 3.8°S of Moon
    13  05     Saturn in Conjunction with Sun 
    13  11:20  Moon at Perigee: 365964 km
    17  03:58  LAST QUARTER MOON 
    17  14:03  Mars 4.7°N of Antares
    20  10:13  Mars 2.3°S of Moon
    22  11:31  Moon at Descending Node 
    22  17:42  Jupiter 0.4°N of Moon: Occn.
    24  12:42  NEW MOON 
    27  22:29  Venus 4.1°N of Moon
    29  12:28  Moon at Apogee: 405390 km

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

Mar 02  06:16  Aldebaran 3.3°S of Moon
    02  10:57  FIRST QUARTER MOON 
    04  05:58  Moon at Ascending Node 
    05  14:26  Pollux 5.2°N of Moon
    06  12:08  Beehive 1.1°S of Moon
    07  23:23  Regulus 3.8°S of Moon
    08  03     Neptune in Conjunction with Sun 
    09  08:48  FULL MOON 
    09  21:33  Moon at Perigee: 357123 km
    16  00:34  LAST QUARTER MOON 
    16  16:00  Moon at Descending Node 
    17  23:19  Mars 0.7°N of Moon: Occn.
    18  01:18  Jupiter 1.5°N of Moon
    18  15:04  Saturn 2.1°N of Moon
    19  18:50  Vernal Equinox 
    19  19     Venus at Perihelion 
    21  08:48  Mercury 3.6°N of Moon
    23  17     Mercury at Greatest Elong: 27.8°W
    24  00:28  NEW MOON 
    24  06:23  Moon at Apogee: 406690 km
    24  13     Venus at Greatest Elong: 46.1°E
    26  20     Mercury at Aphelion 
    29  12:52  Aldebaran 3.6°S of Moon
    31  07:51  Moon at Ascending Node 

Apr 01  01:21  FIRST QUARTER MOON 
    01  22:59  Pollux 4.9°N of Moon
    02  21:25  Beehive 1.3°S of Moon
    03  05:36  Venus 0.3°S of Pleiades
    04  09:45  Regulus 3.9°S of Moon
    07  09:08  Moon at Perigee: 356909 km
    07  17:35  FULL MOON 
    12  17:58  Moon at Descending Node 
    14  13:56  LAST QUARTER MOON 
    14  14:04  Jupiter 2.0°N of Moon
    15  00:26  Saturn 2.5°N of Moon
    15  19:33  Mars 2.0°N of Moon
    20  10:01  Moon at Apogee: 406463 km
    21  21     Lyrid Meteor Shower
    22  17:26  NEW MOON 
    25  18:34  Aldebaran 3.8°S of Moon
    26  01     Uranus in Conjunction with Sun 
    27  08:54  Moon at Ascending Node 
    29  05:19  Pollux 4.7°N of Moon
    30  04:18  Beehive 1.6°S of Moon
    30  11:38  FIRST QUARTER MOON 

May 01  17:49  Regulus 4.2°S of Moon
    04  10     Eta-Aquarid Meteor Shower
    04  12     Mercury at Superior Conjunction 
    05  18:03  Moon at Perigee: 359656 km
    07  01:45  FULL MOON 
    08  12:40  Antares 6.5°S of Moon
    09  19     Mercury at Perihelion 
    10  00:01  Moon at Descending Node 
    12  00:40  Jupiter 2.3°N of Moon
    12  09:18  Saturn 2.7°N of Moon
    14  05:03  LAST QUARTER MOON 
    14  17:00  Mars 2.8°N of Moon
    17  22:45  Moon at Apogee: 405584 km
    22  01     Mercury 0.9° of Venus
    22  08:39  NEW MOON 
    23  17:40  Venus 3.7°N of Moon
    24  01:53  Mercury 2.8°N of Moon
    24  12:34  Moon at Ascending Node 
    26  10:43  Pollux 4.6°N of Moon
    27  09:44  Beehive 1.7°S of Moon
    28  23:44  Regulus 4.3°S of Moon
    29  18:30  FIRST QUARTER MOON 

Jun 02  18:36  Moon at Perigee: 364366 km
    03  09     Venus at Inferior Conjunction 
    04  04     Mercury at Greatest Elong: 23.6°E
    05  10:12  FULL MOON 
    05  10:25  Pen. Lunar Eclipse; mag=0.568
    06  09:10  Moon at Descending Node 
    08  08:19  Jupiter 2.2°N of Moon
    08  17:19  Saturn 2.7°N of Moon
    12  14:53  Mars 2.7°N of Moon
    12  21:24  LAST QUARTER MOON 
    14  15:56  Moon at Apogee: 404597 km
    18  23:52  Venus 0.7°S of Moon: Occn.
    20  12:43  Summer Solstice 
    20  19:24  Moon at Ascending Node 
    20  21:40  Annular Solar Eclipse; mag=0.994
    20  21:41  NEW MOON 
    22  16:53  Pollux 4.5°N of Moon
    23  15:33  Beehive 1.7°S of Moon
    25  05:09  Regulus 4.3°S of Moon
    27  23:16  FIRST QUARTER MOON 
    29  17:09  Moon at Perigee: 368958 km
    30  18     Mercury at Inferior Conjunction 

Date     AKST   Even
        (h:m)

Jul 03  18:18  Moon at Descending Node 
    04  04     Earth at Aphelion: 1.01669 AU
    04  19:30  Pen. Lunar Eclipse; mag=0.355
    04  19:44  FULL MOON 
    05  12:37  Jupiter 1.9°N of Moon
    05  23:45  Saturn 2.5°N of Moon
    10  03     Venus at Aphelion 
    11  03:10  Venus 1.0°N of Aldebaran
    11  10:36  Mars 2.0°N of Moon
    12  10:27  Moon at Apogee: 404201 km
    12  14:29  LAST QUARTER MOON 
    13  22     Jupiter at Opposition 
    16  16:21  Aldebaran 3.8°S of Moon
    16  22:26  Venus 3.1°S of Moon
    18  03:33  Moon at Ascending Node 
    18  18:54  Mercury 3.9°S of Moon
    20  08:33  NEW MOON 
    20  13     Saturn at Opposition 
    22  06     Mercury at Greatest Elong: 20.1°W
    22  11:50  Regulus 4.3°S of Moon
    24  19:54  Moon at Perigee: 368367 km
    27  03:32  FIRST QUARTER MOON 
    27  12     Delta-Aquarid Meteor Shower
    31  00:32  Moon at Descending Node 

Aug 01  11:14  Mercury 6.6°S of Pollux
    01  14:30  Jupiter 1.5°N of Moon
    02  04:17  Saturn 2.3°N of Moon
    03  03     Mars at Perihelion 
    03  06:59  FULL MOON 
    05  19     Mercury at Perihelion 
    08  22:57  Mars 0.8°N of Moon: Occn.
    09  04:51  Moon at Apogee: 404658 km
    11  07:45  LAST QUARTER MOON 
    12  04     Perseid Meteor Shower
    12  16     Venus at Greatest Elong: 45.8°W
    13  01:06  Aldebaran 4.0°S of Moon
    14  10:22  Moon at Ascending Node 
    15  04:01  Venus 4.0°S of Moon
    16  10:10  Pollux 4.5°N of Moon
    17  06     Mercury at Superior Conjunction 
    18  17:41  NEW MOON 
    21  01:59  Moon at Perigee: 363513 km
    25  08:58  FIRST QUARTER MOON 
    25  19:04  Antares 6.2°S of Moon
    27  02:52  Moon at Descending Node 
    28  16:33  Jupiter 1.4°N of Moon
    29  07:40  Saturn 2.2°N of Moon

Sep 01  20:22  FULL MOON 
    05  19:42  Mars 0.0°S of Moon: Occn.
    05  21:31  Moon at Apogee: 405606 km
    09  09:12  Aldebaran 4.2°S of Moon
    10  00:26  LAST QUARTER MOON 
    10  14:05  Moon at Ascending Node 
    11  10     Neptune at Opposition 
    12  15:10  Venus 2.5°S of Beehive
    12  19:50  Pollux 4.3°N of Moon
    13  18:19  Beehive 1.8°S of Moon
    13  19:43  Venus 4.5°S of Moon
    15  06:51  Regulus 4.3°S of Moon
    17  02:00  NEW MOON 
    18  04:44  Moon at Perigee: 359081 km
    18  18     Mercury at Aphelion 
    21  21:06  Mercury 0.3°N of Spica
    22  01:27  Antares 6.0°S of Moon
    22  04:31  Autumnal Equinox 
    23  03:33  Moon at Descending Node 
    23  16:55  FIRST QUARTER MOON 
    24  21:46  Jupiter 1.6°N of Moon
    25  11:46  Saturn 2.3°N of Moon

Oct 01  07     Mercury at Greatest Elong: 25.8°E
    01  12:05  FULL MOON 
    02  08:09  Venus 0.1°S of Regulus
    02  18:21  Mars 0.7°N of Moon: Occn.
    03  08:22  Moon at Apogee: 406321 km
    06  16:02  Aldebaran 4.5°S of Moon
    07  15:29  Moon at Ascending Node 
    09  15:39  LAST QUARTER MOON 
    10  04:18  Pollux 4.1°N of Moon
    11  03:27  Beehive 2.1°S of Moon
    12  16:59  Regulus 4.5°S of Moon
    13  14     Mars at Opposition 
    13  14:57  Venus 4.3°S of Moon
    16  10:31  NEW MOON 
    16  14:46  Moon at Perigee: 356913 km
    19  10:12  Antares 5.7°S of Moon
    20  06:53  Moon at Descending Node 
    20  20     Orionid Meteor Shower
    22  08:10  Jupiter 2.0°N of Moon
    22  18:49  Saturn 2.6°N of Moon
    23  04:23  FIRST QUARTER MOON 
    25  09     Mercury at Inferior Conjunction 
    29  07:13  Mars 3.0°N of Moon
    30  09:46  Moon at Apogee: 406393 km
    30  12     Venus at Perihelion 
    31  05:49  FULL MOON 
    31  07     Uranus at Opposition 

Nov 01  18     Mercury at Perihelion 
    02  21:58  Aldebaran 4.6°S of Moon
    03  17:39  Moon at Ascending Node 
    04  21     S Taurid Meteor Shower
    06  10:52  Pollux 3.9°N of Moon
    07  10:34  Beehive 2.3°S of Moon
    08  04:46  LAST QUARTER MOON 
    09  01:20  Regulus 4.7°S of Moon
    10  08     Mercury at Greatest Elong: 19.1°W
    11  20     N Taurid Meteor Shower
    12  12:30  Venus 3.1°S of Moon
    13  11:45  Mercury 1.7°S of Moon
    14  02:48  Moon at Perigee: 357839 km
    14  20:07  NEW MOON 
    16  04:27  Venus 3.6°N of Spica
    16  15:07  Moon at Descending Node 
    17  02     Leonid Meteor Shower
    18  23:54  Jupiter 2.5°N of Moon
    19  05:57  Saturn 2.9°N of Moon
    21  19:45  FIRST QUARTER MOON 
    25  10:45  Mars 4.9°N of Moon
    26  15:29  Moon at Apogee: 405891 km
    30  00:30  FULL MOON 
    30  00:43  Pen. Lunar Eclipse; mag=0.829
    30  04:07  Aldebaran 4.6°S of Moon
    30  22:46  Moon at Ascending Node 

Dec 03  16:24  Pollux 3.8°N of Moon
    04  16:10  Beehive 2.4°S of Moon
    06  07:28  Regulus 4.8°S of Moon
    07  15:37  LAST QUARTER MOON 
    12  11:40  Venus 0.8°S of Moon: Occn.
    12  11:42  Moon at Perigee: 361777 km
    13  16     Geminid Meteor Shower
    14  02:03  Moon at Descending Node 
    14  07:13  Total Solar Eclipse; mag=1.025
    14  07:17  NEW MOON 
    16  19:28  Jupiter 2.9°N of Moon
    16  20:25  Saturn 3.1°N of Moon
    19  18     Mercury at Superior Conjunction 
    21  01:03  Winter Solstice 
    21  14:41  FIRST QUARTER MOON 
    22  00     Ursid Meteor Shower
    23  05:48  Venus 5.5°N of Antares
    23  09:30  Mars 5.6°N of Moon
    24  07:32  Moon at Apogee: 405010 km
    27  11:20  Aldebaran 4.6°S of Moon
    28  06:03  Moon at Ascending Node 
    29  18:28  FULL MOON 
    30  22:41  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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