2021 Calendar of Astronomical Events




    


2021 Phases of the Moon

Central 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.

2021 Phases of the Moon
Central Standard Time
New Moon First Quarter Full Moon Last Quarter
--- Jan 6 03:37
Jan 12 23:00 Jan 20 15:02 Jan 28 13:16 Feb 4 11:37
Feb 11 13:06 Feb 19 12:47 Feb 27 02:17 Mar 5 19:30
Mar 13 04:21 Mar 21 08:40 Mar 28 12:48 Apr 4 04:02
Apr 11 20:31 Apr 20 00:59 Apr 26 21:31 May 3 13:50
May 11 13:00 May 19 13:13 May 26 05:14 t Jun 2 01:24
Jun 10 04:53 A Jun 17 21:54 Jun 24 12:40 Jul 1 15:11
Jul 9 19:17 Jul 17 04:11 Jul 23 20:37 Jul 31 07:16
Aug 8 07:50 Aug 15 09:20 Aug 22 06:02 Aug 30 01:13
Sep 6 18:52 Sep 13 14:39 Sep 20 17:55 Sep 28 19:57
Oct 6 05:05 Oct 12 21:25 Oct 20 08:57 Oct 28 14:05
Nov 4 15:15 Nov 11 06:46 Nov 19 02:58 p Nov 27 06:28
Dec 4 01:43 T Dec 10 19:36 Dec 18 22:36 Dec 26 20:24

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.



2021 Calendar of Astronomical Events

Central 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.

2021 Calendar of Astronomical Events
January - June July - December
Date     CST   Event
        (h:m)

Jan 01  01:05  Beehive 2.3°S of Moon
    02  08     Earth at Perihelion: 0.98325 AU
    02  15:58  Regulus 4.7°S of Moon
    03  09     Quadrantid Meteor Shower
    06  03:37  LAST QUARTER MOON 
    09  09:39  Moon at Perigee: 367390 km
    09  20:08  Antares 5.6°S of Moon
    09  23     Mercury 1.6° of Saturn
    10  14:14  Moon at Descending Node 
    11  12     Mercury 1.4° of Jupiter
    11  14:12  Venus 1.5°N of Moon
    12  23:00  NEW MOON 
    14  02:15  Mercury 2.3°N of Moon
    20  15:02  FIRST QUARTER MOON 
    20  23:37  Mars 5.1°N of Moon
    21  07:11  Moon at Apogee: 404361 km
    23  20     Mercury at Greatest Elong: 18.6°E
    23  20     Saturn in Conjunction with Sun 
    23  22:39  Aldebaran 4.7°S of Moon
    24  15:47  Moon at Ascending Node 
    27  09:46  Pollux 3.8°N of Moon
    28  08:50  Beehive 2.3°S of Moon
    28  13:16  FULL MOON 
    28  19     Jupiter in Conjunction with Sun 
    28  20     Mercury at Perihelion 
    29  22:56  Regulus 4.6°S of Moon

Feb 03  13:33  Moon at Perigee: 370127 km
    04  11:37  LAST QUARTER MOON 
    06  02:33  Antares 5.5°S of Moon
    06  18:29  Moon at Descending Node 
    08  08     Mercury at Inferior Conjunction 
    11  13:06  NEW MOON 
    15  08     Mercury 3.8° of Jupiter
    18  04:22  Moon at Apogee: 404467 km
    18  16:47  Mars 3.7°N of Moon
    19  12:47  FIRST QUARTER MOON 
    19  23     Venus at Aphelion 
    20  07:15  Aldebaran 5.0°S of Moon
    20  19:44  Moon at Ascending Node 
    23  02     Mercury 4.0° of Saturn
    23  19:10  Pollux 3.7°N of Moon
    24  18:16  Beehive 2.4°S of Moon
    26  08:04  Regulus 4.6°S of Moon
    27  02:17  FULL MOON 

Mar 01  23:19  Moon at Perigee: 365422 km
    03  17:36  Mars 2.6°S of Pleiades
    04  23     Mercury 0.3° of Jupiter
    05  07:58  Antares 5.2°S of Moon
    05  18:56  Moon at Descending Node 
    05  19:30  LAST QUARTER MOON 
    06  05     Mercury at Greatest Elong: 27.3°W
    09  17:02  Saturn 3.7°N of Moon
    10  09:35  Jupiter 4.0°N of Moon
    10  18     Neptune in Conjunction with Sun 
    10  19:02  Mercury 3.7°N of Moon
    13  04:21  NEW MOON 
    13  20     Mercury at Aphelion 
    17  23:04  Moon at Apogee: 405253 km
    19  11:48  Mars 1.9°N of Moon
    19  15:13  Aldebaran 5.2°S of Moon
    19  21:31  Moon at Ascending Node 
    20  03:37  Vernal Equinox 
    20  13:15  Mars 6.9°N of Aldebaran
    21  08:40  FIRST QUARTER MOON 
    23  04:26  Pollux 3.5°N of Moon
    24  03:58  Beehive 2.6°S of Moon
    25  18:17  Regulus 4.7°S of Moon
    26  00     Venus at Superior Conjunction 
    28  12:48  FULL MOON 
    29  09:52  Spica 6.5°S of Moon
    30  00:12  Moon at Perigee: 360311 km

Apr 01  14:49  Antares 4.9°S of Moon
    01  20:41  Moon at Descending Node 
    04  04:02  LAST QUARTER MOON 
    06  02:34  Saturn 4.0°N of Moon
    07  01:15  Jupiter 4.4°N of Moon
    11  20:31  NEW MOON 
    14  11:47  Moon at Apogee: 406120 km
    15  22:07  Aldebaran 5.4°S of Moon
    15  23:53  Moon at Ascending Node 
    17  06:09  Mars 0.1°N of Moon: Occn.
    18  20     Mercury at Superior Conjunction 
    19  12:18  Pollux 3.2°N of Moon
    20  00:59  FIRST QUARTER MOON 
    20  12:25  Beehive 2.8°S of Moon
    22  03:48  Regulus 4.9°S of Moon
    22  06     Lyrid Meteor Shower
    25  20:43  Spica 6.5°S of Moon
    26  19     Mercury at Perihelion 
    26  21:31  FULL MOON 
    27  09:24  Moon at Perigee: 357379 km
    29  00:07  Antares 4.8°S of Moon
    29  03:17  Moon at Descending Node 
    30  15     Uranus in Conjunction with Sun 

May 03  11:02  Saturn 4.2°N of Moon
    03  13:50  LAST QUARTER MOON 
    03  21:03  Mercury 2.1°S of Pleiades
    04  15:00  Jupiter 4.6°N of Moon
    04  19     Eta-Aquarid Meteor Shower
    11  13:00  NEW MOON 
    11  15:54  Moon at Apogee: 406512 km
    13  04:29  Moon at Ascending Node 
    13  11:59  Mercury 2.1°N of Moon
    15  22:47  Mars 1.5°S of Moon
    16  18:39  Pollux 3.1°N of Moon
    17  00     Mercury at Greatest Elong: 22.0°E
    17  19:08  Beehive 2.9°S of Moon
    19  11:28  Regulus 5.0°S of Moon
    19  13:13  FIRST QUARTER MOON 
    23  07:07  Spica 6.5°S of Moon
    25  19:52  Moon at Perigee: 357310 km
    26  05:14  FULL MOON 
    26  05:19  Total Lunar Eclipse; mag=1.009
    26  10:55  Antares 4.8°S of Moon
    26  13:38  Moon at Descending Node 
    28  21     Mercury 0.4° of Venus
    30  19:22  Saturn 4.2°N of Moon
    31  05:41  Mars 5.2°S of Pollux

Jun 01  02:57  Jupiter 4.6°N of Moon
    02  01:24  LAST QUARTER MOON 
    07  20:27  Moon at Apogee: 406230 km
    09  10:42  Moon at Ascending Node 
    10  04:42  Annular Solar Eclipse; mag=0.943
    10  04:53  NEW MOON 
    10  19     Mercury at Inferior Conjunction 
    12  00:44  Venus 1.5°S of Moon
    12  07     Venus at Perihelion 
    13  00:19  Pollux 3.1°N of Moon
    13  13:52  Mars 2.8°S of Moon
    14  00:47  Beehive 2.9°S of Moon
    15  17:28  Regulus 5.0°S of Moon
    17  21:54  FIRST QUARTER MOON 
    20  21:32  Summer Solstice 
    21  09:57  Venus 5.1°S of Pollux
    22  14:36  Mercury 1.8°N of Aldebaran
    22  21:26  Antares 4.8°S of Moon
    22  23:21  Mars 0.3°S of Beehive
    23  00:07  Moon at Descending Node 
    23  03:58  Moon at Perigee: 359960 km
    24  12:40  FULL MOON 
    27  03:30  Saturn 4.0°N of Moon
    28  12:38  Jupiter 4.5°N of Moon

Date     CST   Event
        (h:m)

Jul 01  15:11  LAST QUARTER MOON 
    02  20:45  Venus 0.1°N of Beehive
    04  14     Mercury at Greatest Elong: 21.6°W
    05  08:48  Moon at Apogee: 405342 km
    05  17     Earth at Aphelion: 1.01673 AU
    06  16:41  Moon at Ascending Node 
    06  16:52  Aldebaran 5.5°S of Moon
    07  22:38  Mercury 3.7°S of Moon
    09  19:17  NEW MOON 
    12  03:10  Venus 3.3°S of Moon
    12  04:10  Mars 3.8°S of Moon
    12  18     Mars at Aphelion 
    12  23:02  Regulus 4.9°S of Moon
    16  22:01  Spica 6.4°S of Moon
    17  04:11  FIRST QUARTER MOON 
    20  06:06  Antares 4.7°S of Moon
    20  07:22  Moon at Descending Node 
    21  04:30  Moon at Perigee: 364520 km
    21  15:21  Venus 1.0°N of Regulus
    23  19     Mercury at Perihelion 
    23  20:37  FULL MOON 
    24  10:42  Saturn 3.8°N of Moon
    25  19:17  Jupiter 4.2°N of Moon
    27  21     Delta-Aquarid Meteor Shower
    29  08:09  Mars 0.6°N of Regulus
    31  07:16  LAST QUARTER MOON 

Aug 01  08     Mercury at Superior Conjunction 
    01  23     Saturn at Opposition 
    02  01:35  Moon at Apogee: 404412 km
    02  20:51  Moon at Ascending Node 
    03  00:18  Aldebaran 5.7°S of Moon
    06  13:42  Pollux 3.1°N of Moon
    08  07:50  NEW MOON 
    11  01:00  Venus 4.3°S of Moon
    12  13     Perseid Meteor Shower
    13  03:31  Spica 6.1°S of Moon
    15  09:20  FIRST QUARTER MOON 
    16  10:04  Moon at Descending Node 
    16  12:34  Antares 4.5°S of Moon
    17  03:23  Moon at Perigee: 369127 km
    18  21     Mercury 0.1° of Mars
    19  17     Jupiter at Opposition 
    20  16:19  Saturn 3.7°N of Moon
    21  22:52  Jupiter 4.0°N of Moon
    22  06:02  FULL MOON 
    29  20:22  Moon at Apogee: 404100 km
    29  23:13  Moon at Ascending Node 
    30  01:13  LAST QUARTER MOON 

Sep 02  22:04  Pollux 3.0°N of Moon
    03  22:07  Beehive 2.9°S of Moon
    05  08:32  Venus 1.4°N of Spica
    05  18     Mercury at Aphelion 
    06  18:52  NEW MOON 
    09  10:01  Spica 5.9°S of Moon
    09  20:09  Venus 4.1°S of Moon
    11  04:05  Moon at Perigee: 368464 km
    12  10:35  Moon at Descending Node 
    12  17:59  Antares 4.2°S of Moon
    13  14:39  FIRST QUARTER MOON 
    13  22     Mercury at Greatest Elong: 26.8°E
    14  02     Neptune at Opposition 
    16  20:37  Saturn 3.8°N of Moon
    18  00:50  Jupiter 4.0°N of Moon
    20  17:55  FULL MOON 
    20  20:00  Mercury 1.2°S of Spica
    22  13:21  Autumnal Equinox 
    26  01:33  Moon at Ascending Node 
    26  15:44  Moon at Apogee: 404641 km
    28  19:57  LAST QUARTER MOON 
    30  06:44  Pollux 2.8°N of Moon

Oct 01  07:07  Beehive 3.1°S of Moon
    02  16     Venus at Aphelion 
    02  23:12  Regulus 4.9°S of Moon
    06  05:05  NEW MOON 
    07  22     Mars in Conjunction with Sun 
    08  11:28  Moon at Perigee: 363388 km
    09  10     Mercury at Inferior Conjunction 
    09  12:36  Venus 2.9°S of Moon
    09  13:35  Moon at Descending Node 
    10  00:27  Antares 4.0°S of Moon
    12  21:25  FIRST QUARTER MOON 
    14  01:12  Saturn 3.9°N of Moon
    15  03:58  Jupiter 4.1°N of Moon
    16  07:24  Venus 1.4°N of Antares
    19  18     Mercury at Perihelion 
    20  08:57  FULL MOON 
    21  05     Orionid Meteor Shower
    23  05:47  Moon at Ascending Node 
    24  09:30  Moon at Apogee: 405616 km
    24  23     Mercury at Greatest Elong: 18.4°W
    27  14:40  Pollux 2.6°N of Moon
    28  14:05  LAST QUARTER MOON 
    28  15:32  Beehive 3.3°S of Moon
    29  16     Venus at Greatest Elong: 47.0°E
    30  08:33  Regulus 5.1°S of Moon

Nov 01  19:18  Mercury 3.7°N of Spica
    03  12:40  Mercury 1.2°S of Moon: Occn.
    04  15:15  NEW MOON 
    04  18     Uranus at Opposition 
    05  06     S Taurid Meteor Shower
    05  16:23  Moon at Perigee: 358845 km
    05  21:38  Moon at Descending Node 
    06  09:29  Antares 3.9°S of Moon
    07  23:21  Venus 1.1°S of Moon: Occn.
    10  08:27  Saturn 4.1°N of Moon
    11  06:46  FIRST QUARTER MOON 
    11  11:13  Jupiter 4.4°N of Moon
    12  05     N Taurid Meteor Shower
    17  12     Leonid Meteor Shower
    19  02:58  FULL MOON 
    19  03:03  Partial Lunar Eclipse; mag=0.974
    19  11:59  Moon at Ascending Node 
    20  20:14  Moon at Apogee: 406276 km
    23  21:22  Pollux 2.5°N of Moon
    24  22:32  Beehive 3.3°S of Moon
    26  16:27  Regulus 5.2°S of Moon
    27  06:28  LAST QUARTER MOON 
    28  23     Mercury at Superior Conjunction 
    30  16:04  Spica 5.9°S of Moon

Dec 03  08:58  Moon at Descending Node 
    04  01:33  Total Solar Eclipse; mag=1.037
    04  01:43  NEW MOON 
    04  04:01  Moon at Perigee: 356794 km
    06  18:48  Venus 1.9°N of Moon
    07  19:52  Saturn 4.2°N of Moon
    09  00:07  Jupiter 4.5°N of Moon
    10  19:36  FIRST QUARTER MOON 
    14  01     Geminid Meteor Shower
    16  18:12  Moon at Ascending Node 
    17  20:16  Moon at Apogee: 406322 km
    18  22:36  FULL MOON 
    21  03:20  Pollux 2.6°N of Moon
    21  09:59  Winter Solstice 
    22  04:28  Beehive 3.3°S of Moon
    22  09     Ursid Meteor Shower
    23  22:40  Regulus 5.1°S of Moon
    26  20:24  LAST QUARTER MOON 
    27  03:15  Mars 4.4°N of Antares
    28  00:58  Spica 5.8°S of Moon
    28  23     Mercury 4.2° of Venus
    30  19:07  Moon at Descending Node 
    31  07:54  Antares 3.9°S of Moon
    31  14:13  Mars 1.0°N of Moon: Occn.

    

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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