2023 Calendar of Astronomical Events




    


2023 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.

2023 Phases of the Moon
Central Standard Time
New Moon First Quarter Full Moon Last Quarter
-- Jan 6 17:08 Jan 14 20:10
Jan 21 14:53 Jan 28 09:19 Feb 5 12:29 Feb 13 10:01
Feb 20 01:06 Feb 27 02:06 Mar 7 06:40 Mar 14 20:08
Mar 21 11:23 Mar 28 20:32 Apr 5 22:35 Apr 13 03:11
Apr 19 22:12 H Apr 27 15:20 May 5 11:34 n May 12 08:28
May 19 09:53 May 27 09:22 Jun 3 21:42 Jun 10 13:31
Jun 17 22:37 Jun 26 01:50 Jul 3 05:39 Jul 9 19:48
Jul 17 12:32 Jul 25 16:07 Aug 1 12:31 Aug 8 04:28
Aug 16 03:38 Aug 24 03:57 Aug 30 19:35 Sep 6 16:21
Sep 14 19:40 Sep 22 13:32 Sep 29 03:57 Oct 6 07:48
Oct 14 11:55 A Oct 21 21:29 Oct 28 14:24 p Nov 5 02:37
Nov 13 03:27 Nov 20 04:50 Nov 27 03:16 Dec 4 23:49
Dec 12 17:32 Dec 19 12:39 Dec 26 18:33 -

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.



2023 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.

2023 Calendar of Astronomical Events
January - June July - December
Date     CST   Event
        (h:m)

Jan 01  09:25  Moon at Ascending Node 
    02  14     Mercury at Perihelion 
    02  19:24  Pleiades 2.6°N of Moon
    03  13:35  Mars 0.5°N of Moon: Occn.
    03  21     Quadrantid Meteor Shower
    04  10     Earth at Perihelion: 0.98329 AU
    06  17:08  FULL MOON 
    07  07     Mercury at Inferior Conjunction 
    07  07:40  Pollux 1.9°N of Moon
    08  03:19  Moon at Apogee: 406459 km
    08  09:23  Beehive 3.6°S of Moon
    10  05:38  Regulus 4.6°S of Moon
    14  15:59  Spica 3.9°S of Moon
    14  20:10  LAST QUARTER MOON 
    16  00:32  Moon at Descending Node 
    18  03:32  Antares 2.1°S of Moon
    21  14:53  NEW MOON 
    21  14:58  Moon at Perigee: 356570 km
    23  01:22  Saturn 3.8°N of Moon
    23  02:20  Venus 3.5°N of Moon
    25  02     Jupiter at Perihelion 
    25  20:00  Jupiter 1.8°N of Moon
    28  09:19  FIRST QUARTER MOON 
    28  10:05  Moon at Ascending Node 
    30  00     Mercury at Greatest Elong: 25.0°W
    30  01:21  Pleiades 2.4°N of Moon
    30  22:24  Mars 0.1°N of Moon: Occn.

Feb 03  13:47  Pollux 1.9°N of Moon
    04  02:55  Moon at Apogee: 406476 km
    04  15:32  Beehive 3.5°S of Moon
    05  12:29  FULL MOON 
    06  11:44  Regulus 4.5°S of Moon
    10  22:23  Spica 3.6°S of Moon
    12  01:31  Moon at Descending Node 
    13  10:01  LAST QUARTER MOON 
    14  12:09  Antares 1.9°S of Moon
    15  14     Mercury at Aphelion 
    16  10     Saturn in Conjunction with Sun 
    18  14:53  Mercury 3.6°N of Moon
    19  03:06  Moon at Perigee: 358267 km
    20  01:06  NEW MOON 
    22  01:57  Venus 2.1°N of Moon
    22  15:58  Jupiter 1.2°N of Moon: Occn.
    24  12:56  Moon at Ascending Node 
    26  08:42  Pleiades 2.1°N of Moon
    27  02:06  FIRST QUARTER MOON 
    27  22:32  Mars 1.1°S of Moon: Occn.

Mar 02  08     Mercury 0.9° of Saturn
    02  20:10  Pollux 1.7°N of Moon
    03  12:01  Moon at Apogee: 405890 km
    03  21:56  Beehive 3.6°S of Moon
    05  18:08  Regulus 4.5°S of Moon
    07  06:40  FULL MOON 
    10  04:06  Spica 3.4°S of Moon
    11  02:53  Moon at Descending Node 
    13  18:21  Antares 1.6°S of Moon
    14  20:08  LAST QUARTER MOON 
    15  17     Neptune in Conjunction with Sun 
    17  05     Mercury at Superior Conjunction 
    19  09:16  Moon at Perigee: 362698 km
    19  09:20  Saturn 3.6°N of Moon
    20  15:25  Vernal Equinox 
    21  11:23  NEW MOON 
    23  20:08  Moon at Ascending Node 
    24  04:28  Venus 0.1°N of Moon: Occn.
    25  17:42  Pleiades 1.9°N of Moon
    28  07:16  Mars 2.3°S of Moon
    28  20:32  FIRST QUARTER MOON 
    30  03:23  Pollux 1.6°N of Moon
    31  05:07  Beehive 3.8°S of Moon
    31  05:18  Moon at Apogee: 404921 km
    31  14     Mercury at Perihelion 

Apr 02  01:22  Regulus 4.6°S of Moon
    05  22:35  FULL MOON 
    06  10:45  Spica 3.3°S of Moon
    07  07:51  Moon at Descending Node 
    09  23:50  Antares 1.5°S of Moon
    10  22:42  Venus 2.5°S of Pleiades
    11  15     Jupiter in Conjunction with Sun 
    11  16     Mercury at Greatest Elong: 19.5°E
    13  03:11  LAST QUARTER MOON 
    15  20:22  Moon at Perigee: 367967 km
    15  21:47  Saturn 3.5°N of Moon
    17  10     Venus at Perihelion 
    19  03:08  Venus 7.3°N of Aldebaran
    19  22:12  NEW MOON 
    19  22:17  Hybrid Solar Eclipse; mag=1.013
    20  05:32  Moon at Ascending Node 
    22  03:14  Pleiades 1.9°N of Moon
    22  19     Lyrid Meteor Shower
    23  07:03  Venus 1.3°S of Moon
    25  20:18  Mars 3.2°S of Moon
    26  11:26  Pollux 1.5°N of Moon
    27  13:02  Beehive 3.8°S of Moon
    27  15:20  FIRST QUARTER MOON 
    28  00:43  Moon at Apogee: 404300 km
    29  09:21  Regulus 4.7°S of Moon

May 01  17     Mercury at Inferior Conjunction 
    03  18:55  Spica 3.3°S of Moon
    04  15:57  Moon at Descending Node 
    05  08     Eta-Aquarid Meteor Shower
    05  11:23  Pen. Lunar Eclipse; mag=0.964
    05  11:34  FULL MOON 
    07  06:35  Antares 1.5°S of Moon
    08  05:27  Mars 4.9°S of Pollux
    09  15     Uranus in Conjunction with Sun 
    10  22:57  Moon at Perigee: 369345 km
    12  08:28  LAST QUARTER MOON 
    13  07:04  Saturn 3.3°N of Moon
    17  07     Mercury 6.2° of Jupiter
    17  07:15  Jupiter 0.8°S of Moon: Occn.
    17  13:36  Moon at Ascending Node 
    17  19:34  Mercury 3.6°S of Moon
    19  09:53  NEW MOON 
    23  06:08  Venus 2.2°S of Moon
    23  19:37  Pollux 1.6°N of Moon
    24  11:32  Mars 3.8°S of Moon
    24  21:06  Beehive 3.8°S of Moon
    25  19:39  Moon at Apogee: 404510 km
    26  17:30  Regulus 4.6°S of Moon
    27  09:22  FIRST QUARTER MOON 
    28  23     Mercury at Greatest Elong: 24.9°W
    29  07:04  Venus 3.9°S of Pollux
    30  17     Mars at Aphelion 
    31  04:05  Spica 3.3°S of Moon

Jun 01  00:22  Moon at Descending Node 
    01  21:35  Mars 0.1°S of Beehive
    03  15:19  Antares 1.6°S of Moon
    03  21:42  FULL MOON 
    04  05     Venus at Greatest Elong: 45.4°E
    06  17:07  Moon at Perigee: 364860 km
    09  14:19  Saturn 3.0°N of Moon
    10  13:31  LAST QUARTER MOON 
    11  11:50  Mercury 5.9°S of Pleiades
    13  05:05  Venus 0.5°N of Beehive
    13  18:05  Moon at Ascending Node 
    14  00:33  Jupiter 1.5°S of Moon
    15  18:47  Pleiades 1.8°N of Moon
    16  14:16  Mercury 4.2°N of Aldebaran
    16  14:39  Mercury 4.3°S of Moon
    17  22:37  NEW MOON 
    20  03:10  Pollux 1.7°N of Moon
    21  04:38  Beehive 3.6°S of Moon
    21  08:58  Summer Solstice 
    21  18:47  Venus 3.7°S of Moon
    22  04:09  Mars 3.8°S of Moon
    22  12:30  Moon at Apogee: 405385 km
    23  01:08  Regulus 4.4°S of Moon
    26  01:50  FIRST QUARTER MOON 
    27  13     Mercury at Perihelion 
    27  13:08  Spica 3.1°S of Moon
    28  06:22  Moon at Descending Node 
    30  23     Mercury at Superior Conjunction 

Date     CST   Event
        (h:m)

Jul 01  01:20  Antares 1.5°S of Moon
    03  05:39  FULL MOON 
    04  16:28  Moon at Perigee: 360151 km
    06  13     Earth at Aphelion: 1.01668 AU
    06  21:05  Saturn 2.7°N of Moon
    09  19:48  LAST QUARTER MOON 
    09  23:21  Mars 0.6°N of Regulus
    10  19:23  Moon at Ascending Node 
    11  15:18  Jupiter 2.2°S of Moon
    13  00:31  Pleiades 1.7°N of Moon
    14  16:33  Mercury 0.2°N of Beehive
    16  02:05  Venus 1.7°S of Regulus
    17  12:32  NEW MOON 
    19  02:56  Mercury 3.5°S of Moon
    20  00:56  Moon at Apogee: 406291 km
    20  07:53  Regulus 4.2°S of Moon
    20  22:00  Mars 3.3°S of Moon
    24  21:01  Spica 2.8°S of Moon
    25  09:05  Moon at Descending Node 
    25  16:07  FIRST QUARTER MOON 
    27  05     Mercury 5.1° of Venus
    28  10     Delta-Aquarid Meteor Shower
    28  11:11  Antares 1.3°S of Moon
    28  12:21  Mercury 0.1°S of Regulus

Aug 01  12:31  FULL MOON 
    01  23:52  Moon at Perigee: 357311 km
    03  04:21  Saturn 2.5°N of Moon
    06  20:46  Moon at Ascending Node 
    07  18     Venus at Aphelion 
    08  03:41  Jupiter 2.9°S of Moon
    08  04:28  LAST QUARTER MOON 
    09  06:16  Pleiades 1.5°N of Moon
    09  20     Mercury at Greatest Elong: 27.4°E
    10  12     Mercury at Aphelion 
    13  01     Perseid Meteor Shower
    13  02     Mercury 4.7° of Mars
    13  05     Venus at Inferior Conjunction 
    13  15:36  Pollux 1.7°N of Moon
    16  03:38  NEW MOON 
    16  05:55  Moon at Apogee: 406635 km
    18  17:06  Mars 2.2°S of Moon
    21  03:28  Spica 2.6°S of Moon
    21  10:23  Moon at Descending Node 
    24  03:57  FIRST QUARTER MOON 
    24  19:29  Antares 1.1°S of Moon
    27  02     Saturn at Opposition 
    30  09:51  Moon at Perigee: 357182 km
    30  12:03  Saturn 2.5°N of Moon
    30  19:35  FULL MOON 

Sep 03  01:44  Moon at Ascending Node 
    04  13:44  Jupiter 3.3°S of Moon
    05  13:25  Pleiades 1.2°N of Moon
    06  05     Mercury at Inferior Conjunction 
    06  16:21  LAST QUARTER MOON 
    09  21:32  Pollux 1.5°N of Moon
    10  23:15  Beehive 3.6°S of Moon
    12  09:42  Moon at Apogee: 406289 km
    12  20:00  Regulus 4.1°S of Moon
    14  19:40  NEW MOON 
    17  09:12  Spica 2.4°S of Moon
    17  13:18  Moon at Descending Node 
    19  04     Neptune at Opposition 
    21  01:50  Antares 0.9°S of Moon
    22  07     Mercury at Greatest Elong: 17.9°W
    22  13:32  FIRST QUARTER MOON 
    23  00:50  Autumnal Equinox 
    23  12     Mercury at Perihelion 
    26  19:25  Saturn 2.7°N of Moon
    27  19:05  Moon at Perigee: 359911 km
    29  03:57  FULL MOON 
    30  10:49  Moon at Ascending Node 

Oct 01  21:16  Jupiter 3.4°S of Moon
    02  22:25  Pleiades 1.1°N of Moon
    06  07:48  LAST QUARTER MOON 
    07  04:23  Pollux 1.4°N of Moon
    08  05:57  Beehive 3.7°S of Moon
    09  00:08  Venus 2.3°S of Regulus
    09  21:41  Moon at Apogee: 405426 km
    10  02:41  Regulus 4.2°S of Moon
    14  11:55  NEW MOON 
    14  11:59  Annular Solar Eclipse; mag=0.952
    14  19:11  Moon at Descending Node 
    18  07:17  Antares 0.9°S of Moon
    19  23     Mercury at Superior Conjunction 
    21  18     Orionid Meteor Shower
    21  21:29  FIRST QUARTER MOON 
    23  16     Venus at Greatest Elong: 46.4°W
    24  01:52  Saturn 2.8°N of Moon
    25  20:53  Moon at Perigee: 364873 km
    27  21:14  Moon at Ascending Node 
    28  14:14  Partial Lunar Eclipse; mag=0.122
    28  14:24  FULL MOON 
    29  02:10  Jupiter 3.1°S of Moon
    30  08:30  Pleiades 1.1°N of Moon

Nov 02  22     Jupiter at Opposition 
    03  12:31  Pollux 1.4°N of Moon
    04  13:46  Beehive 3.7°S of Moon
    05  02:37  LAST QUARTER MOON 
    05  18     S Taurid Meteor Shower
    06  10:19  Regulus 4.2°S of Moon
    06  15:49  Moon at Apogee: 404569 km
    09  03:28  Venus 1.0°S of Moon: Occn.
    10  23:09  Spica 2.4°S of Moon
    11  02:49  Moon at Descending Node 
    12  18     N Taurid Meteor Shower
    13  03:27  NEW MOON 
    13  12     Uranus at Opposition 
    16  15:17  Mercury 2.5°N of Antares
    17  23     Mars in Conjunction with Sun 
    18  00     Leonid Meteor Shower
    20  04:50  FIRST QUARTER MOON 
    20  08:02  Saturn 2.7°N of Moon
    21  15:03  Moon at Perigee: 369824 km
    24  05:02  Moon at Ascending Node 
    25  05:10  Jupiter 2.8°S of Moon
    26  18:02  Pleiades 1.1°N of Moon
    27  03:16  FULL MOON 
    28  03     Venus at Perihelion 
    29  04:27  Venus 3.9°N of Spica
    30  21:23  Pollux 1.6°N of Moon

Dec 01  22:21  Beehive 3.6°S of Moon
    03  18:38  Regulus 4.0°S of Moon
    04  08     Mercury at Greatest Elong: 21.3°E
    04  12:42  Moon at Apogee: 404348 km
    04  23:49  LAST QUARTER MOON 
    08  08:05  Spica 2.3°S of Moon
    08  09:24  Moon at Descending Node 
    09  10:53  Venus 3.6°N of Moon
    12  17:32  NEW MOON 
    13  23:18  Mercury 4.4°N of Moon
    14  13     Geminid Meteor Shower
    16  12:53  Moon at Perigee: 367900 km
    17  15:58  Saturn 2.5°N of Moon
    19  12:39  FIRST QUARTER MOON 
    20  11     Mercury at Perihelion 
    21  07:54  Moon at Ascending Node 
    21  21:28  Winter Solstice 
    22  08:20  Jupiter 2.6°S of Moon
    22  13     Mercury at Inferior Conjunction 
    22  21     Ursid Meteor Shower
    24  01:37  Pleiades 1.1°N of Moon
    26  18:33  FULL MOON 
    28  05:51  Pollux 1.7°N of Moon
    29  06:45  Beehive 3.4°S of Moon
    31  02:52  Regulus 3.8°S 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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