2018 Calendar of Astronomical Events



2018 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.

2018 Phases of the Moon
Central Standard Time
New Moon First Quarter Full Moon Last Quarter
-- Jan 1 20:24 Jan 8 16:25
Jan 16 20:17 Jan 24 16:20 Jan 31 07:27 t Feb 7 09:54
Feb 15 15:05 P Feb 23 02:09 Mar 1 18:51 Mar 9 05:20
Mar 17 07:12 Mar 24 09:35 Mar 31 06:37 Apr 8 01:18
Apr 15 19:57 Apr 22 15:46 Apr 29 18:58 May 7 20:09
May 15 05:48 May 21 21:49 May 29 08:20 Jun 6 12:32
Jun 13 13:43 Jun 20 04:51 Jun 27 22:53 Jul 6 01:51
Jul 12 20:48 P Jul 19 13:52 Jul 27 14:20 t Aug 4 12:18
Aug 11 03:58 P Aug 18 01:49 Aug 26 05:56 Sep 2 20:37
Sep 9 12:01 Sep 16 17:15 Sep 24 20:53 Oct 2 03:45
Oct 8 21:47 Oct 16 12:02 Oct 24 10:45 Oct 31 10:40
Nov 7 10:02 Nov 15 08:54 Nov 22 23:39 Nov 29 18:19
Dec 7 01:20 Dec 15 05:49 Dec 22 11:49 Dec 29 03:34

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.



2018 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.

2018 Calendar of Astronomical Events
January - June July - December
Date     CST   Event
        (h:m)

Jan 01  14     Mercury at Greatest Elong: 22.7°W
    01  15:54  Moon at Perigee: 356566 km
    01  20:24  FULL MOON 
    03  00     Earth at Perihelion: 0.98329 AU
    03  13:50  Beehive 2.3°N of Moon
    03  14     Quadrantid Meteor Shower
    04  01:48  Moon at Ascending Node 
    05  01:24  Regulus 0.9°S of Moon
    08  16:25  LAST QUARTER MOON 
    09  00     Venus at Superior Conjunction 
    10  23:59  Jupiter 4.3°S of Moon
    11  04:03  Mars 4.6°S of Moon
    13  02     Mercury 0.7° of Saturn
    14  20:10  Moon at Apogee: 406461 km
    14  20:13  Saturn 2.6°S of Moon
    15  01:24  Mercury 3.4°S of Moon
    16  20:17  NEW MOON 
    18  08:28  Moon at Descending Node 
    23  11     Venus at Aphelion 
    24  16:20  FIRST QUARTER MOON 
    25  05     Mercury at Aphelion 
    27  04:09  Aldebaran 0.7°S of Moon
    30  03:54  Moon at Perigee: 358995 km
    31  01:19  Beehive 2.3°N of Moon
    31  07:27  FULL MOON 
    31  07:30  Total Lunar Eclipse; mag=1.315
    31  12:46  Moon at Ascending Node 

Feb 01  12:24  Regulus 0.9°S of Moon
    07  09:54  LAST QUARTER MOON 
    07  13:47  Jupiter 4.3°S of Moon
    08  23:12  Mars 4.4°S of Moon
    11  08:16  Moon at Apogee: 405701 km
    11  08:46  Saturn 2.5°S of Moon
    11  10:40  Mars 5.0°N of Antares
    14  15:11  Moon at Descending Node 
    15  14:51  Partial Solar Eclipse; mag=0.599
    15  15:05  NEW MOON 
    17  06     Mercury at Superior Conjunction 
    23  02:09  FIRST QUARTER MOON 
    23  11:07  Aldebaran 0.7°S of Moon
    27  08:48  Moon at Perigee: 363938 km
    27  11:28  Beehive 2.3°N of Moon
    27  23:03  Moon at Ascending Node 
    28  23:09  Regulus 0.9°S of Moon

Mar 01  18:51  FULL MOON 
    04  00     Mercury 1.1° of Venus
    04  08     Neptune in Conjunction with Sun 
    07  00:57  Jupiter 4.1°S of Moon
    09  05:20  LAST QUARTER MOON 
    09  18:37  Mars 3.8°S of Moon
    10  05     Mercury at Perihelion 
    10  20:37  Saturn 2.2°S of Moon
    11  03:13  Moon at Apogee: 404682 km
    13  21:47  Moon at Descending Node 
    15  09     Mercury at Greatest Elong: 18.4°E
    17  07:12  NEW MOON 
    18  13:07  Venus 3.7°N of Moon
    19  02     Mercury 3.8° of Venus
    20  10:15  Vernal Equinox 
    22  16:33  Aldebaran 0.9°S of Moon
    24  09:35  FIRST QUARTER MOON 
    26  11:17  Moon at Perigee: 369104 km
    26  18:52  Beehive 2.2°N of Moon
    27  04:56  Moon at Ascending Node 
    28  07:38  Regulus 1.0°S of Moon
    31  06:37  FULL MOON 

Apr 01  12     Mercury at Inferior Conjunction 
    03  08:14  Jupiter 3.9°S of Moon
    03  11     Saturn at Aphelion 
    07  06:50  Saturn 1.9°S of Moon
    07  12:15  Mars 3.1°S of Moon
    07  23:32  Moon at Apogee: 404145 km
    08  01:18  LAST QUARTER MOON 
    10  02:09  Moon at Descending Node 
    14  03:24  Mercury 3.9°N of Moon
    15  19:57  NEW MOON 
    17  13:29  Venus 5.4°N of Moon
    18  09     Uranus in Conjunction with Sun 
    18  22:45  Aldebaran 1.1°S of Moon
    20  08:44  Moon at Perigee: 368713 km
    22  12     Lyrid Meteor Shower
    22  15:46  FIRST QUARTER MOON 
    23  00:17  Beehive 1.9°N of Moon
    23  06:19  Moon at Ascending Node 
    24  10:47  Venus 3.4°S of Pleiades
    24  13:39  Regulus 1.2°S of Moon
    29  12     Mercury at Greatest Elong: 27.0°W
    29  18:58  FULL MOON 
    30  11:16  Jupiter 3.8°S of Moon

May 02  07:29  Venus 6.3°N of Aldebaran
    04  14:31  Saturn 1.7°S of Moon
    05  01     Eta-Aquarid Meteor Shower
    05  18:35  Moon at Apogee: 404458 km
    06  01:24  Mars 2.7°S of Moon
    07  04:23  Moon at Descending Node 
    07  20:09  LAST QUARTER MOON 
    08  18     Jupiter at Opposition 
    13  11:21  Mercury 2.4°N of Moon
    15  05:48  NEW MOON 
    15  19     Venus at Perihelion 
    17  12:11  Venus 4.8°N of Moon
    17  15:06  Moon at Perigee: 363777 km
    20  05:57  Beehive 1.7°N of Moon
    20  07:13  Moon at Ascending Node 
    21  18:53  Regulus 1.4°S of Moon
    21  21:49  FIRST QUARTER MOON 
    27  11:39  Jupiter 4.0°S of Moon
    29  08:20  FULL MOON 
    31  19:20  Saturn 1.6°S of Moon

Jun 02  10:34  Moon at Apogee: 405316 km
    03  05:58  Mars 3.2°S of Moon
    03  06:39  Moon at Descending Node 
    05  20     Mercury at Superior Conjunction 
    06  04     Mercury at Perihelion 
    06  12:32  LAST QUARTER MOON 
    07  21:37  Venus 4.6°S of Pollux
    13  13:43  NEW MOON 
    14  17:55  Moon at Perigee: 359507 km
    16  07:13  Venus 2.3°N of Moon
    16  11:50  Moon at Ascending Node 
    16  13:38  Beehive 1.5°N of Moon
    18  01:25  Regulus 1.7°S of Moon
    19  20:21  Venus 0.4°N of Beehive
    20  04:51  FIRST QUARTER MOON 
    21  04:07  Summer Solstice 
    23  12:47  Jupiter 4.2°S of Moon
    24  15:37  Mercury 4.7°S of Pollux
    27  06     Saturn at Opposition 
    27  21:59  Saturn 1.8°S of Moon
    27  22:53  FULL MOON 
    29  20:43  Moon at Apogee: 406061 km
    30  10:44  Moon at Descending Node 
    30  19:43  Mars 4.8°S of Moon

Date     CST   Event
        (h:m)

Jul 03  23:39  Mercury 0.6°S of Beehive
    06  01:51  LAST QUARTER MOON 
    06  11     Earth at Aphelion: 1.01670 AU
    09  17:34  Venus 0.9°N of Regulus
    10  03:30  Aldebaran 1.1°S of Moon
    11  23     Mercury at Greatest Elong: 26.4°E
    12  20:48  NEW MOON 
    12  21:01  Partial Solar Eclipse; mag=0.337
    13  02:28  Moon at Perigee: 357432 km
    13  20:50  Moon at Ascending Node 
    14  16:04  Mercury 2.2°S of Moon
    15  10:14  Regulus 1.7°S of Moon
    15  21:31  Venus 1.6°S of Moon
    19  13:52  FIRST QUARTER MOON 
    20  04     Mercury at Aphelion 
    20  17:57  Jupiter 4.4°S of Moon
    24  10:49  Mercury 1.2°S of Regulus
    25  00:10  Saturn 2.0°S of Moon
    27  00     Mars at Opposition 
    26  23:44  Moon at Apogee: 406223 km
    27  14:20  FULL MOON 
    27  14:22  Total Lunar Eclipse; mag=1.609
    27  16:40  Moon at Descending Node 
    28  03     Delta-Aquarid Meteor Shower

Aug 04  12:18  LAST QUARTER MOON 
    06  12:35  Aldebaran 1.1°S of Moon
    08  20     Mercury at Inferior Conjunction 
    10  07:40  Moon at Ascending Node 
    10  12:05  Moon at Perigee: 358083 km
    11  03:46  Partial Solar Eclipse; mag=0.737
    11  03:58  NEW MOON 
    12  19     Perseid Meteor Shower
    14  07:35  Venus 6.3°S of Moon
    17  04:38  Jupiter 4.5°S of Moon
    17  10     Venus at Greatest Elong: 45.9°E
    18  01:49  FIRST QUARTER MOON 
    20  20:09  Mercury 4.8°S of Beehive
    21  03:55  Saturn 2.1°S of Moon
    23  05:23  Moon at Apogee: 405744 km
    23  22:51  Moon at Descending Node 
    26  05:56  FULL MOON 
    26  14     Mercury at Greatest Elong: 18.3°W
    31  22:45  Venus 1.0°S of Spica

Sep 02  04     Mercury at Perihelion 
    02  19:34  Aldebaran 1.2°S of Moon
    02  20:37  LAST QUARTER MOON 
    06  16:42  Moon at Ascending Node 
    06  20:13  Beehive 1.4°N of Moon
    07  11     Neptune at Opposition 
    07  19:21  Moon at Perigee: 361355 km
    09  12:01  NEW MOON 
    13  20:21  Jupiter 4.4°S of Moon
    16  06     Mars at Perihelion 
    16  17:15  FIRST QUARTER MOON 
    17  10:46  Saturn 2.1°S of Moon
    19  18:54  Moon at Apogee: 404875 km
    20  00:38  Mars 4.8°S of Moon
    20  03:30  Moon at Descending Node 
    20  20     Mercury at Superior Conjunction 
    22  19:54  Autumnal Equinox 
    24  20:52  FULL MOON 
    30  01:06  Aldebaran 1.4°S of Moon

Oct 02  03:45  LAST QUARTER MOON 
    03  21:10  Moon at Ascending Node 
    04  03:51  Beehive 1.3°N of Moon
    05  15:58  Regulus 1.8°S of Moon
    05  16:29  Moon at Perigee: 366396 km
    08  21:47  NEW MOON 
    11  15:21  Jupiter 4.1°S of Moon
    14  21:01  Saturn 1.8°S of Moon
    15  21     Mercury 6.2° of Venus
    16  12:02  FIRST QUARTER MOON 
    17  06:03  Moon at Descending Node 
    17  13:16  Moon at Apogee: 404227 km
    18  07:01  Mars 1.9°S of Moon
    21  11     Orionid Meteor Shower
    23  19     Uranus at Opposition 
    24  10:45  FULL MOON 
    26  08     Venus at Inferior Conjunction 
    27  07:04  Aldebaran 1.6°S of Moon
    29  00     Mercury 3.1° of Jupiter
    30  21:46  Moon at Ascending Node 
    31  09:24  Beehive 1.0°N of Moon
    31  10:40  LAST QUARTER MOON 
    31  14:05  Moon at Perigee: 370201 km

Nov 01  22:16  Regulus 2.1°S of Moon
    05  12     S Taurid Meteor Shower
    06  09     Mercury at Greatest Elong: 23.3°E
    07  10:02  NEW MOON 
    08  22:58  Mercury 1.8°N of Antares
    11  09:46  Saturn 1.4°S of Moon
    12  11     N Taurid Meteor Shower
    13  08:04  Moon at Descending Node 
    14  09:57  Moon at Apogee: 404341 km
    14  17:14  Venus 0.2°S of Spica
    15  08:54  FIRST QUARTER MOON 
    15  22:16  Mars 1.0°N of Moon: Occn.
    17  17     Leonid Meteor Shower
    22  23:39  FULL MOON 
    23  15:11  Aldebaran 1.7°S of Moon
    26  00     Jupiter in Conjunction with Sun 
    26  06:10  Moon at Perigee: 366623 km
    26  23:18  Moon at Ascending Node 
    27  03     Mercury at Inferior Conjunction 
    27  14:57  Beehive 0.8°N of Moon
    29  03     Mercury at Perihelion 
    29  03:27  Regulus 2.3°S of Moon
    29  18:19  LAST QUARTER MOON 

Dec 03  12:42  Venus 3.6°S of Moon
    05  15:06  Mercury 1.9°S of Moon
    07  01:20  NEW MOON 
    08  23:30  Saturn 1.1°S of Moon: Occn.
    10  11:57  Moon at Descending Node 
    12  06:25  Moon at Apogee: 405177 km
    14  06     Geminid Meteor Shower
    14  17:21  Mars 3.6°N of Moon
    15  05     Mercury at Greatest Elong: 21.3°W
    15  05:49  FIRST QUARTER MOON 
    21  01:31  Aldebaran 1.7°S of Moon
    21  14     Mercury 0.8° of Jupiter
    21  16:22  Winter Solstice 
    22  02:05  Mercury 5.8°N of Antares
    22  09:03  Jupiter 5.1°N of Antares
    22  11:49  FULL MOON 
    22  15     Ursid Meteor Shower
    24  03:52  Moon at Perigee: 361060 km
    24  05:54  Moon at Ascending Node 
    24  22:52  Beehive 0.6°N of Moon
    26  10:06  Regulus 2.5°S of Moon
    26  12     Venus at Perihelion 
    29  03:34  LAST QUARTER 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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