2020 Calendar of Astronomical Events




    


2020 Phases of the Moon

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

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

Mountain 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     MST   Event
        (h:m)

Jan 01  18:30  Moon at Apogee: 404580 km
    02  21:45  FIRST QUARTER MOON 
    04  02     Quadrantid Meteor Shower
    05  01     Earth at Perihelion: 0.98324 AU
    07  14:09  Aldebaran 3.0°S of Moon
    09  16:29  Moon at Ascending Node 
    10  08     Mercury at Superior Conjunction 
    10  12:10  Pen. Lunar Eclipse; mag=0.896
    10  12:21  FULL MOON 
    10  19:26  Pollux 5.3°N of Moon
    11  16:54  Beehive 1.0°S of Moon
    13  04:37  Regulus 3.8°S of Moon
    13  07     Saturn in Conjunction with Sun 
    13  13:20  Moon at Perigee: 365964 km
    17  05:58  LAST QUARTER MOON 
    17  16:03  Mars 4.7°N of Antares
    20  12:13  Mars 2.3°S of Moon
    22  13:31  Moon at Descending Node 
    22  19:42  Jupiter 0.4°N of Moon: Occn.
    24  14:42  NEW MOON 
    28  00:29  Venus 4.1°N of Moon
    29  14:28  Moon at Apogee: 405390 km

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

Mar 02  08:16  Aldebaran 3.3°S of Moon
    02  12:57  FIRST QUARTER MOON 
    04  07:58  Moon at Ascending Node 
    05  16:26  Pollux 5.2°N of Moon
    06  14:08  Beehive 1.1°S of Moon
    08  01:23  Regulus 3.8°S of Moon
    08  05     Neptune in Conjunction with Sun 
    09  10:48  FULL MOON 
    09  23:33  Moon at Perigee: 357123 km
    16  02:34  LAST QUARTER MOON 
    16  18:00  Moon at Descending Node 
    18  01:19  Mars 0.7°N of Moon: Occn.
    18  03:18  Jupiter 1.5°N of Moon
    18  17:04  Saturn 2.1°N of Moon
    19  20:50  Vernal Equinox 
    19  21     Venus at Perihelion 
    21  10:48  Mercury 3.6°N of Moon
    23  19     Mercury at Greatest Elong: 27.8°W
    24  02:28  NEW MOON 
    24  08:23  Moon at Apogee: 406690 km
    24  15     Venus at Greatest Elong: 46.1°E
    26  22     Mercury at Aphelion 
    29  14:52  Aldebaran 3.6°S of Moon
    31  09:51  Moon at Ascending Node 

Apr 01  03:21  FIRST QUARTER MOON 
    02  00:59  Pollux 4.9°N of Moon
    02  23:25  Beehive 1.3°S of Moon
    03  07:36  Venus 0.3°S of Pleiades
    04  11:45  Regulus 3.9°S of Moon
    07  11:08  Moon at Perigee: 356909 km
    07  19:35  FULL MOON 
    12  19:58  Moon at Descending Node 
    14  15:56  LAST QUARTER MOON 
    14  16:04  Jupiter 2.0°N of Moon
    15  02:26  Saturn 2.5°N of Moon
    15  21:33  Mars 2.0°N of Moon
    20  12:01  Moon at Apogee: 406463 km
    21  23     Lyrid Meteor Shower
    22  19:26  NEW MOON 
    25  20:34  Aldebaran 3.8°S of Moon
    26  03     Uranus in Conjunction with Sun 
    27  10:54  Moon at Ascending Node 
    29  07:19  Pollux 4.7°N of Moon
    30  06:18  Beehive 1.6°S of Moon
    30  13:38  FIRST QUARTER MOON 

May 01  19:49  Regulus 4.2°S of Moon
    04  12     Eta-Aquarid Meteor Shower
    04  14     Mercury at Superior Conjunction 
    05  20:03  Moon at Perigee: 359656 km
    07  03:45  FULL MOON 
    08  14:40  Antares 6.5°S of Moon
    09  21     Mercury at Perihelion 
    10  02:01  Moon at Descending Node 
    12  02:40  Jupiter 2.3°N of Moon
    12  11:18  Saturn 2.7°N of Moon
    14  07:03  LAST QUARTER MOON 
    14  19:00  Mars 2.8°N of Moon
    18  00:45  Moon at Apogee: 405584 km
    22  03     Mercury 0.9° of Venus
    22  10:39  NEW MOON 
    23  19:40  Venus 3.7°N of Moon
    24  03:53  Mercury 2.8°N of Moon
    24  14:34  Moon at Ascending Node 
    26  12:43  Pollux 4.6°N of Moon
    27  11:44  Beehive 1.7°S of Moon
    29  01:44  Regulus 4.3°S of Moon
    29  20:30  FIRST QUARTER MOON 

Jun 02  20:36  Moon at Perigee: 364366 km
    03  11     Venus at Inferior Conjunction 
    04  06     Mercury at Greatest Elong: 23.6°E
    05  12:12  FULL MOON 
    05  12:25  Pen. Lunar Eclipse; mag=0.568
    06  11:10  Moon at Descending Node 
    08  10:19  Jupiter 2.2°N of Moon
    08  19:19  Saturn 2.7°N of Moon
    12  16:53  Mars 2.7°N of Moon
    12  23:24  LAST QUARTER MOON 
    14  17:56  Moon at Apogee: 404597 km
    19  01:52  Venus 0.7°S of Moon: Occn.
    20  14:43  Summer Solstice 
    20  21:24  Moon at Ascending Node 
    20  23:40  Annular Solar Eclipse; mag=0.994
    20  23:41  NEW MOON 
    22  18:53  Pollux 4.5°N of Moon
    23  17:33  Beehive 1.7°S of Moon
    25  07:09  Regulus 4.3°S of Moon
    28  01:16  FIRST QUARTER MOON 
    29  19:09  Moon at Perigee: 368958 km
    30  20     Mercury at Inferior Conjunction 

Date     MST   Event
        (h:m)

Jul 03  20:18  Moon at Descending Node 
    04  06     Earth at Aphelion: 1.01669 AU
    04  21:30  Pen. Lunar Eclipse; mag=0.355
    04  21:44  FULL MOON 
    05  14:37  Jupiter 1.9°N of Moon
    06  01:45  Saturn 2.5°N of Moon
    10  05     Venus at Aphelion 
    11  05:10  Venus 1.0°N of Aldebaran
    11  12:36  Mars 2.0°N of Moon
    12  12:27  Moon at Apogee: 404201 km
    12  16:29  LAST QUARTER MOON 
    14  00     Jupiter at Opposition 
    16  18:21  Aldebaran 3.8°S of Moon
    17  00:26  Venus 3.1°S of Moon
    18  05:33  Moon at Ascending Node 
    18  20:54  Mercury 3.9°S of Moon
    20  10:33  NEW MOON 
    20  15     Saturn at Opposition 
    22  08     Mercury at Greatest Elong: 20.1°W
    22  13:50  Regulus 4.3°S of Moon
    24  21:54  Moon at Perigee: 368367 km
    27  05:32  FIRST QUARTER MOON 
    27  14     Delta-Aquarid Meteor Shower
    31  02:32  Moon at Descending Node 

Aug 01  13:14  Mercury 6.6°S of Pollux
    01  16:30  Jupiter 1.5°N of Moon
    02  06:17  Saturn 2.3°N of Moon
    03  05     Mars at Perihelion 
    03  08:59  FULL MOON 
    05  21     Mercury at Perihelion 
    09  00:57  Mars 0.8°N of Moon: Occn.
    09  06:51  Moon at Apogee: 404658 km
    11  09:45  LAST QUARTER MOON 
    12  06     Perseid Meteor Shower
    12  18     Venus at Greatest Elong: 45.8°W
    13  03:06  Aldebaran 4.0°S of Moon
    14  12:22  Moon at Ascending Node 
    15  06:01  Venus 4.0°S of Moon
    16  12:10  Pollux 4.5°N of Moon
    17  08     Mercury at Superior Conjunction 
    18  19:41  NEW MOON 
    21  03:59  Moon at Perigee: 363513 km
    25  10:58  FIRST QUARTER MOON 
    25  21:04  Antares 6.2°S of Moon
    27  04:52  Moon at Descending Node 
    28  18:33  Jupiter 1.4°N of Moon
    29  09:40  Saturn 2.2°N of Moon

Sep 01  22:22  FULL MOON 
    05  21:42  Mars 0.0°S of Moon: Occn.
    05  23:31  Moon at Apogee: 405606 km
    09  11:12  Aldebaran 4.2°S of Moon
    10  02:26  LAST QUARTER MOON 
    10  16:05  Moon at Ascending Node 
    11  12     Neptune at Opposition 
    12  17:10  Venus 2.5°S of Beehive
    12  21:50  Pollux 4.3°N of Moon
    13  20:19  Beehive 1.8°S of Moon
    13  21:43  Venus 4.5°S of Moon
    15  08:51  Regulus 4.3°S of Moon
    17  04:00  NEW MOON 
    18  06:44  Moon at Perigee: 359081 km
    18  20     Mercury at Aphelion 
    21  23:06  Mercury 0.3°N of Spica
    22  03:27  Antares 6.0°S of Moon
    22  06:31  Autumnal Equinox 
    23  05:33  Moon at Descending Node 
    23  18:55  FIRST QUARTER MOON 
    24  23:46  Jupiter 1.6°N of Moon
    25  13:46  Saturn 2.3°N of Moon

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

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

Dec 01  00:46  Moon at Ascending Node 
    03  18:24  Pollux 3.8°N of Moon
    04  18:10  Beehive 2.4°S of Moon
    06  09:28  Regulus 4.8°S of Moon
    07  17:37  LAST QUARTER MOON 
    12  13:40  Venus 0.8°S of Moon: Occn.
    12  13:42  Moon at Perigee: 361777 km
    13  18     Geminid Meteor Shower
    14  04:03  Moon at Descending Node 
    14  09:13  Total Solar Eclipse; mag=1.025
    14  09:17  NEW MOON 
    16  21:28  Jupiter 2.9°N of Moon
    16  22:25  Saturn 3.1°N of Moon
    19  20     Mercury at Superior Conjunction 
    21  03:03  Winter Solstice 
    21  16:41  FIRST QUARTER MOON 
    22  02     Ursid Meteor Shower
    23  07:48  Venus 5.5°N of Antares
    23  11:30  Mars 5.6°N of Moon
    24  09:32  Moon at Apogee: 405010 km
    27  13:20  Aldebaran 4.6°S of Moon
    28  08:03  Moon at Ascending Node 
    29  20:28  FULL MOON 
    31  00:41  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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