2020 Calendar of Astronomical Events




    


2020 Phases of the Moon

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

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

Hawaiian 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     HST   Event
        (h:m)

Jan 01  15:30  Moon at Apogee: 404580 km
    02  18:45  FIRST QUARTER MOON 
    03  23     Quadrantid Meteor Shower
    04  22     Earth at Perihelion: 0.98324 AU
    07  11:09  Aldebaran 3.0°S of Moon
    09  13:29  Moon at Ascending Node 
    10  05     Mercury at Superior Conjunction 
    10  09:10  Pen. Lunar Eclipse; mag=0.896
    10  09:21  FULL MOON 
    10  16:26  Pollux 5.3°N of Moon
    11  13:54  Beehive 1.0°S of Moon
    13  01:37  Regulus 3.8°S of Moon
    13  04     Saturn in Conjunction with Sun 
    13  10:20  Moon at Perigee: 365964 km
    17  02:58  LAST QUARTER MOON 
    17  13:03  Mars 4.7°N of Antares
    20  09:13  Mars 2.3°S of Moon
    22  10:31  Moon at Descending Node 
    22  16:42  Jupiter 0.4°N of Moon: Occn.
    24  11:42  NEW MOON 
    27  21:29  Venus 4.1°N of Moon
    29  11:28  Moon at Apogee: 405390 km

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

Mar 02  05:16  Aldebaran 3.3°S of Moon
    02  09:57  FIRST QUARTER MOON 
    04  04:58  Moon at Ascending Node 
    05  13:26  Pollux 5.2°N of Moon
    06  11:08  Beehive 1.1°S of Moon
    07  22:23  Regulus 3.8°S of Moon
    08  02     Neptune in Conjunction with Sun 
    09  07:48  FULL MOON 
    09  20:33  Moon at Perigee: 357123 km
    15  23:34  LAST QUARTER MOON 
    16  15:00  Moon at Descending Node 
    17  22:19  Mars 0.7°N of Moon: Occn.
    18  00:18  Jupiter 1.5°N of Moon
    18  14:04  Saturn 2.1°N of Moon
    19  17:50  Vernal Equinox 
    19  18     Venus at Perihelion 
    21  07:48  Mercury 3.6°N of Moon
    23  16     Mercury at Greatest Elong: 27.8°W
    23  23:28  NEW MOON 
    24  05:23  Moon at Apogee: 406690 km
    24  12     Venus at Greatest Elong: 46.1°E
    26  19     Mercury at Aphelion 
    29  11:52  Aldebaran 3.6°S of Moon
    31  06:51  Moon at Ascending Node 

Apr 01  00:21  FIRST QUARTER MOON 
    01  21:59  Pollux 4.9°N of Moon
    02  20:25  Beehive 1.3°S of Moon
    03  04:36  Venus 0.3°S of Pleiades
    04  08:45  Regulus 3.9°S of Moon
    07  08:08  Moon at Perigee: 356909 km
    07  16:35  FULL MOON 
    12  16:58  Moon at Descending Node 
    14  12:56  LAST QUARTER MOON 
    14  13:04  Jupiter 2.0°N of Moon
    14  23:26  Saturn 2.5°N of Moon
    15  18:33  Mars 2.0°N of Moon
    20  09:01  Moon at Apogee: 406463 km
    21  20     Lyrid Meteor Shower
    22  16:26  NEW MOON 
    25  17:34  Aldebaran 3.8°S of Moon
    26  00     Uranus in Conjunction with Sun 
    27  07:54  Moon at Ascending Node 
    29  04:19  Pollux 4.7°N of Moon
    30  03:18  Beehive 1.6°S of Moon
    30  10:38  FIRST QUARTER MOON 

May 01  16:49  Regulus 4.2°S of Moon
    04  09     Eta-Aquarid Meteor Shower
    04  11     Mercury at Superior Conjunction 
    05  17:03  Moon at Perigee: 359656 km
    07  00:45  FULL MOON 
    08  11:40  Antares 6.5°S of Moon
    09  18     Mercury at Perihelion 
    09  23:01  Moon at Descending Node 
    11  23:40  Jupiter 2.3°N of Moon
    12  08:18  Saturn 2.7°N of Moon
    14  04:03  LAST QUARTER MOON 
    14  16:00  Mars 2.8°N of Moon
    17  21:45  Moon at Apogee: 405584 km
    22  00     Mercury 0.9° of Venus
    22  07:39  NEW MOON 
    23  16:40  Venus 3.7°N of Moon
    24  00:53  Mercury 2.8°N of Moon
    24  11:34  Moon at Ascending Node 
    26  09:43  Pollux 4.6°N of Moon
    27  08:44  Beehive 1.7°S of Moon
    28  22:44  Regulus 4.3°S of Moon
    29  17:30  FIRST QUARTER MOON 

Jun 02  17:36  Moon at Perigee: 364366 km
    03  08     Venus at Inferior Conjunction 
    04  03     Mercury at Greatest Elong: 23.6°E
    05  09:12  FULL MOON 
    05  09:25  Pen. Lunar Eclipse; mag=0.568
    06  08:10  Moon at Descending Node 
    08  07:19  Jupiter 2.2°N of Moon
    08  16:19  Saturn 2.7°N of Moon
    12  13:53  Mars 2.7°N of Moon
    12  20:24  LAST QUARTER MOON 
    14  14:56  Moon at Apogee: 404597 km
    18  22:52  Venus 0.7°S of Moon: Occn.
    20  11:43  Summer Solstice 
    20  18:24  Moon at Ascending Node 
    20  20:40  Annular Solar Eclipse; mag=0.994
    20  20:41  NEW MOON 
    22  15:53  Pollux 4.5°N of Moon
    23  14:33  Beehive 1.7°S of Moon
    25  04:09  Regulus 4.3°S of Moon
    27  22:16  FIRST QUARTER MOON 
    29  16:09  Moon at Perigee: 368958 km
    30  17     Mercury at Inferior Conjunction 

Date     HST   Event
        (h:m)

Jul 03  17:18  Moon at Descending Node 
    04  03     Earth at Aphelion: 1.01669 AU
    04  18:30  Pen. Lunar Eclipse; mag=0.355
    04  18:44  FULL MOON 
    05  11:37  Jupiter 1.9°N of Moon
    05  22:45  Saturn 2.5°N of Moon
    10  02     Venus at Aphelion 
    11  02:10  Venus 1.0°N of Aldebaran
    11  09:36  Mars 2.0°N of Moon
    12  09:27  Moon at Apogee: 404201 km
    12  13:29  LAST QUARTER MOON 
    13  21     Jupiter at Opposition 
    16  15:21  Aldebaran 3.8°S of Moon
    16  21:26  Venus 3.1°S of Moon
    18  02:33  Moon at Ascending Node 
    18  17:54  Mercury 3.9°S of Moon
    20  07:33  NEW MOON 
    20  12     Saturn at Opposition 
    22  05     Mercury at Greatest Elong: 20.1°W
    22  10:50  Regulus 4.3°S of Moon
    24  18:54  Moon at Perigee: 368367 km
    27  02:32  FIRST QUARTER MOON 
    27  11     Delta-Aquarid Meteor Shower
    30  23:32  Moon at Descending Node 

Aug 01  10:14  Mercury 6.6°S of Pollux
    01  13:30  Jupiter 1.5°N of Moon
    02  03:17  Saturn 2.3°N of Moon
    03  02     Mars at Perihelion 
    03  05:59  FULL MOON 
    05  18     Mercury at Perihelion 
    08  21:57  Mars 0.8°N of Moon: Occn.
    09  03:51  Moon at Apogee: 404658 km
    11  06:45  LAST QUARTER MOON 
    12  03     Perseid Meteor Shower
    12  15     Venus at Greatest Elong: 45.8°W
    13  00:06  Aldebaran 4.0°S of Moon
    14  09:22  Moon at Ascending Node 
    15  03:01  Venus 4.0°S of Moon
    16  09:10  Pollux 4.5°N of Moon
    17  05     Mercury at Superior Conjunction 
    18  16:41  NEW MOON 
    21  00:59  Moon at Perigee: 363513 km
    25  07:58  FIRST QUARTER MOON 
    25  18:04  Antares 6.2°S of Moon
    27  01:52  Moon at Descending Node 
    28  15:33  Jupiter 1.4°N of Moon
    29  06:40  Saturn 2.2°N of Moon

Sep 01  19:22  FULL MOON 
    05  18:42  Mars 0.0°S of Moon: Occn.
    05  20:31  Moon at Apogee: 405606 km
    09  08:12  Aldebaran 4.2°S of Moon
    09  23:26  LAST QUARTER MOON 
    10  13:05  Moon at Ascending Node 
    11  09     Neptune at Opposition 
    12  14:10  Venus 2.5°S of Beehive
    12  18:50  Pollux 4.3°N of Moon
    13  17:19  Beehive 1.8°S of Moon
    13  18:43  Venus 4.5°S of Moon
    15  05:51  Regulus 4.3°S of Moon
    17  01:00  NEW MOON 
    18  03:44  Moon at Perigee: 359081 km
    18  17     Mercury at Aphelion 
    21  20:06  Mercury 0.3°N of Spica
    22  00:27  Antares 6.0°S of Moon
    22  03:31  Autumnal Equinox 
    23  02:33  Moon at Descending Node 
    23  15:55  FIRST QUARTER MOON 
    24  20:46  Jupiter 1.6°N of Moon
    25  10:46  Saturn 2.3°N of Moon

Oct 01  06     Mercury at Greatest Elong: 25.8°E
    01  11:05  FULL MOON 
    02  07:09  Venus 0.1°S of Regulus
    02  17:21  Mars 0.7°N of Moon: Occn.
    03  07:22  Moon at Apogee: 406321 km
    06  15:02  Aldebaran 4.5°S of Moon
    07  14:29  Moon at Ascending Node 
    09  14:39  LAST QUARTER MOON 
    10  03:18  Pollux 4.1°N of Moon
    11  02:27  Beehive 2.1°S of Moon
    12  15:59  Regulus 4.5°S of Moon
    13  13     Mars at Opposition 
    13  13:57  Venus 4.3°S of Moon
    16  09:31  NEW MOON 
    16  13:46  Moon at Perigee: 356913 km
    19  09:12  Antares 5.7°S of Moon
    20  05:53  Moon at Descending Node 
    20  19     Orionid Meteor Shower
    22  07:10  Jupiter 2.0°N of Moon
    22  17:49  Saturn 2.6°N of Moon
    23  03:23  FIRST QUARTER MOON 
    25  08     Mercury at Inferior Conjunction 
    29  06:13  Mars 3.0°N of Moon
    30  08:46  Moon at Apogee: 406393 km
    30  11     Venus at Perihelion 
    31  04:49  FULL MOON 
    31  06     Uranus at Opposition 

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

Dec 03  15:24  Pollux 3.8°N of Moon
    04  15:10  Beehive 2.4°S of Moon
    06  06:28  Regulus 4.8°S of Moon
    07  14:37  LAST QUARTER MOON 
    12  10:40  Venus 0.8°S of Moon: Occn.
    12  10:42  Moon at Perigee: 361777 km
    13  15     Geminid Meteor Shower
    14  01:03  Moon at Descending Node 
    14  06:13  Total Solar Eclipse; mag=1.025
    14  06:17  NEW MOON 
    16  18:28  Jupiter 2.9°N of Moon
    16  19:25  Saturn 3.1°N of Moon
    19  17     Mercury at Superior Conjunction 
    21  00:03  Winter Solstice 
    21  13:41  FIRST QUARTER MOON 
    21  23     Ursid Meteor Shower
    23  04:48  Venus 5.5°N of Antares
    23  08:30  Mars 5.6°N of Moon
    24  06:32  Moon at Apogee: 405010 km
    27  10:20  Aldebaran 4.6°S of Moon
    28  05:03  Moon at Ascending Node 
    29  17:28  FULL MOON 
    30  21:41  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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