2018 Calendar of Astronomical Events



2018 Phases of the Moon

Greenwich Mean 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
Greenwich Mean Time
New Moon First Quarter Full Moon Last Quarter
-- Jan 2 02:24 Jan 8 22:25
Jan 17 02:17 Jan 24 22:20 Jan 31 13:27 t Feb 7 15:54
Feb 15 21:05 P Feb 23 08:09 Mar 2 00:51 Mar 9 11:20
Mar 17 13:12 Mar 24 15:35 Mar 31 12:37 Apr 8 07:18
Apr 16 01:57 Apr 22 21:46 Apr 30 00:58 May 8 02:09
May 15 11:48 May 22 03:49 May 29 14:20 Jun 6 18:32
Jun 13 19:43 Jun 20 10:51 Jun 28 04:53 Jul 6 07:51
Jul 13 02:48 P Jul 19 19:52 Jul 27 20:20 t Aug 4 18:18
Aug 11 09:58 P Aug 18 07:49 Aug 26 11:56 Sep 3 02:37
Sep 9 18:01 Sep 16 23:15 Sep 25 02:53 Oct 2 09:45
Oct 9 03:47 Oct 16 18:02 Oct 24 16:45 Oct 31 16:40
Nov 7 16:02 Nov 15 14:54 Nov 23 05:39 Nov 30 00:19
Dec 7 07:20 Dec 15 11:49 Dec 22 17:49 Dec 29 09:34

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

Greenwich Mean 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     GMT   Event
        (h:m)

Jan 01  20     Mercury at Greatest Elong: 22.7°W
    01  21:54  Moon at Perigee: 356566 km
    02  02:24  FULL MOON 
    03  06     Earth at Perihelion: 0.98329 AU
    03  19:50  Beehive 2.3°N of Moon
    03  20     Quadrantid Meteor Shower
    04  07:48  Moon at Ascending Node 
    05  07:24  Regulus 0.9°S of Moon
    08  22:25  LAST QUARTER MOON 
    09  06     Venus at Superior Conjunction 
    11  05:59  Jupiter 4.3°S of Moon
    11  10:03  Mars 4.6°S of Moon
    13  08     Mercury 0.7° of Saturn
    15  02:10  Moon at Apogee: 406461 km
    15  02:13  Saturn 2.6°S of Moon
    15  07:24  Mercury 3.4°S of Moon
    17  02:17  NEW MOON 
    18  14:28  Moon at Descending Node 
    23  17     Venus at Aphelion 
    24  22:20  FIRST QUARTER MOON 
    25  11     Mercury at Aphelion 
    27  10:09  Aldebaran 0.7°S of Moon
    30  09:54  Moon at Perigee: 358995 km
    31  07:19  Beehive 2.3°N of Moon
    31  13:27  FULL MOON 
    31  13:30  Total Lunar Eclipse; mag=1.315
    31  18:46  Moon at Ascending Node 

Feb 01  18:24  Regulus 0.9°S of Moon
    07  15:54  LAST QUARTER MOON 
    07  19:47  Jupiter 4.3°S of Moon
    09  05:12  Mars 4.4°S of Moon
    11  14:16  Moon at Apogee: 405701 km
    11  14:46  Saturn 2.5°S of Moon
    11  16:40  Mars 5.0°N of Antares
    14  21:11  Moon at Descending Node 
    15  20:51  Partial Solar Eclipse; mag=0.599
    15  21:05  NEW MOON 
    17  12     Mercury at Superior Conjunction 
    23  08:09  FIRST QUARTER MOON 
    23  17:07  Aldebaran 0.7°S of Moon
    27  14:48  Moon at Perigee: 363938 km
    27  17:28  Beehive 2.3°N of Moon
    28  05:03  Moon at Ascending Node 

Mar 01  05:09  Regulus 0.9°S of Moon
    02  00:51  FULL MOON 
    04  06     Mercury 1.1° of Venus
    04  14     Neptune in Conjunction with Sun 
    07  06:57  Jupiter 4.1°S of Moon
    09  11:20  LAST QUARTER MOON 
    10  00:37  Mars 3.8°S of Moon
    10  11     Mercury at Perihelion 
    11  02:37  Saturn 2.2°S of Moon
    11  09:13  Moon at Apogee: 404682 km
    14  03:47  Moon at Descending Node 
    15  15     Mercury at Greatest Elong: 18.4°E
    17  13:12  NEW MOON 
    18  19:07  Venus 3.7°N of Moon
    19  08     Mercury 3.8° of Venus
    20  16:15  Vernal Equinox 
    22  22:33  Aldebaran 0.9°S of Moon
    24  15:35  FIRST QUARTER MOON 
    26  17:17  Moon at Perigee: 369104 km
    27  00:52  Beehive 2.2°N of Moon
    27  10:56  Moon at Ascending Node 
    28  13:38  Regulus 1.0°S of Moon
    31  12:37  FULL MOON 

Apr 01  18     Mercury at Inferior Conjunction 
    03  14:14  Jupiter 3.9°S of Moon
    03  17     Saturn at Aphelion 
    07  12:50  Saturn 1.9°S of Moon
    07  18:15  Mars 3.1°S of Moon
    08  05:32  Moon at Apogee: 404145 km
    08  07:18  LAST QUARTER MOON 
    10  08:09  Moon at Descending Node 
    14  09:24  Mercury 3.9°N of Moon
    16  01:57  NEW MOON 
    17  19:29  Venus 5.4°N of Moon
    18  15     Uranus in Conjunction with Sun 
    19  04:45  Aldebaran 1.1°S of Moon
    20  14:44  Moon at Perigee: 368713 km
    22  18     Lyrid Meteor Shower
    22  21:46  FIRST QUARTER MOON 
    23  06:17  Beehive 1.9°N of Moon
    23  12:19  Moon at Ascending Node 
    24  16:47  Venus 3.4°S of Pleiades
    24  19:39  Regulus 1.2°S of Moon
    29  18     Mercury at Greatest Elong: 27.0°W
    30  00:58  FULL MOON 
    30  17:16  Jupiter 3.8°S of Moon

May 02  13:29  Venus 6.3°N of Aldebaran
    04  20:31  Saturn 1.7°S of Moon
    05  07     Eta-Aquarid Meteor Shower
    06  00:35  Moon at Apogee: 404458 km
    06  07:24  Mars 2.7°S of Moon
    07  10:23  Moon at Descending Node 
    08  02:09  LAST QUARTER MOON 
    09  00     Jupiter at Opposition 
    13  17:21  Mercury 2.4°N of Moon
    15  11:48  NEW MOON 
    16  01     Venus at Perihelion 
    17  18:11  Venus 4.8°N of Moon
    17  21:06  Moon at Perigee: 363777 km
    20  11:57  Beehive 1.7°N of Moon
    20  13:13  Moon at Ascending Node 
    22  00:53  Regulus 1.4°S of Moon
    22  03:49  FIRST QUARTER MOON 
    27  17:39  Jupiter 4.0°S of Moon
    29  14:20  FULL MOON 

Jun 01  01:20  Saturn 1.6°S of Moon
    02  16:34  Moon at Apogee: 405316 km
    03  11:58  Mars 3.2°S of Moon
    03  12:39  Moon at Descending Node 
    06  02     Mercury at Superior Conjunction 
    06  10     Mercury at Perihelion 
    06  18:32  LAST QUARTER MOON 
    08  03:37  Venus 4.6°S of Pollux
    13  19:43  NEW MOON 
    14  23:55  Moon at Perigee: 359507 km
    16  13:13  Venus 2.3°N of Moon
    16  17:50  Moon at Ascending Node 
    16  19:38  Beehive 1.5°N of Moon
    18  07:25  Regulus 1.7°S of Moon
    20  02:21  Venus 0.4°N of Beehive
    20  10:51  FIRST QUARTER MOON 
    21  10:07  Summer Solstice 
    23  18:47  Jupiter 4.2°S of Moon
    24  21:37  Mercury 4.7°S of Pollux
    27  12     Saturn at Opposition 
    28  03:59  Saturn 1.8°S of Moon
    28  04:53  FULL MOON 
    30  02:43  Moon at Apogee: 406061 km
    30  16:44  Moon at Descending Node 

Date     GMT   Event
        (h:m)

Jul 01  01:43  Mars 4.8°S of Moon
    04  05:39  Mercury 0.6°S of Beehive
    06  07:51  LAST QUARTER MOON 
    06  17     Earth at Aphelion: 1.01670 AU
    09  23:34  Venus 0.9°N of Regulus
    10  09:30  Aldebaran 1.1°S of Moon
    12  05     Mercury at Greatest Elong: 26.4°E
    13  02:48  NEW MOON 
    13  03:01  Partial Solar Eclipse; mag=0.337
    13  08:28  Moon at Perigee: 357432 km
    14  02:50  Moon at Ascending Node 
    14  22:04  Mercury 2.2°S of Moon
    15  16:14  Regulus 1.7°S of Moon
    16  03:31  Venus 1.6°S of Moon
    19  19:52  FIRST QUARTER MOON 
    20  10     Mercury at Aphelion 
    20  23:57  Jupiter 4.4°S of Moon
    24  16:49  Mercury 1.2°S of Regulus
    25  06:10  Saturn 2.0°S of Moon
    27  06     Mars at Opposition 
    27  05:44  Moon at Apogee: 406223 km
    27  20:20  FULL MOON 
    27  20:22  Total Lunar Eclipse; mag=1.609
    27  22:40  Moon at Descending Node 
    28  09     Delta-Aquarid Meteor Shower

Aug 04  18:18  LAST QUARTER MOON 
    06  18:35  Aldebaran 1.1°S of Moon
    09  02     Mercury at Inferior Conjunction 
    10  13:40  Moon at Ascending Node 
    10  18:05  Moon at Perigee: 358083 km
    11  09:46  Partial Solar Eclipse; mag=0.737
    11  09:58  NEW MOON 
    13  01     Perseid Meteor Shower
    14  13:35  Venus 6.3°S of Moon
    17  10:38  Jupiter 4.5°S of Moon
    17  16     Venus at Greatest Elong: 45.9°E
    18  07:49  FIRST QUARTER MOON 
    21  02:09  Mercury 4.8°S of Beehive
    21  09:55  Saturn 2.1°S of Moon
    23  11:23  Moon at Apogee: 405744 km
    24  04:51  Moon at Descending Node 
    26  11:56  FULL MOON 
    26  20     Mercury at Greatest Elong: 18.3°W

Sep 01  04:45  Venus 1.0°S of Spica
    02  10     Mercury at Perihelion 
    03  01:34  Aldebaran 1.2°S of Moon
    03  02:37  LAST QUARTER MOON 
    06  22:42  Moon at Ascending Node 
    07  02:13  Beehive 1.4°N of Moon
    07  17     Neptune at Opposition 
    08  01:21  Moon at Perigee: 361355 km
    09  18:01  NEW MOON 
    14  02:21  Jupiter 4.4°S of Moon
    16  12     Mars at Perihelion 
    16  23:15  FIRST QUARTER MOON 
    17  16:46  Saturn 2.1°S of Moon
    20  00:54  Moon at Apogee: 404875 km
    20  06:38  Mars 4.8°S of Moon
    20  09:30  Moon at Descending Node 
    21  02     Mercury at Superior Conjunction 
    23  01:54  Autumnal Equinox 
    25  02:52  FULL MOON 
    30  07:06  Aldebaran 1.4°S of Moon

Oct 02  09:45  LAST QUARTER MOON 
    04  03:10  Moon at Ascending Node 
    04  09:51  Beehive 1.3°N of Moon
    05  21:58  Regulus 1.8°S of Moon
    05  22:29  Moon at Perigee: 366396 km
    09  03:47  NEW MOON 
    11  21:21  Jupiter 4.1°S of Moon
    15  03:01  Saturn 1.8°S of Moon
    16  03     Mercury 6.2° of Venus
    16  18:02  FIRST QUARTER MOON 
    17  12:03  Moon at Descending Node 
    17  19:16  Moon at Apogee: 404227 km
    18  13:01  Mars 1.9°S of Moon
    21  17     Orionid Meteor Shower
    24  01     Uranus at Opposition 
    24  16:45  FULL MOON 
    26  14     Venus at Inferior Conjunction 
    27  13:04  Aldebaran 1.6°S of Moon
    29  06     Mercury 3.1° of Jupiter
    31  03:46  Moon at Ascending Node 
    31  15:24  Beehive 1.0°N of Moon
    31  16:40  LAST QUARTER MOON 
    31  20:05  Moon at Perigee: 370201 km

Nov 02  04:16  Regulus 2.1°S of Moon
    05  18     S Taurid Meteor Shower
    06  15     Mercury at Greatest Elong: 23.3°E
    07  16:02  NEW MOON 
    09  04:58  Mercury 1.8°N of Antares
    11  15:46  Saturn 1.4°S of Moon
    12  17     N Taurid Meteor Shower
    13  14:04  Moon at Descending Node 
    14  15:57  Moon at Apogee: 404341 km
    14  23:14  Venus 0.2°S of Spica
    15  14:54  FIRST QUARTER MOON 
    16  04:16  Mars 1.0°N of Moon: Occn.
    17  23     Leonid Meteor Shower
    23  05:39  FULL MOON 
    23  21:11  Aldebaran 1.7°S of Moon
    26  06     Jupiter in Conjunction with Sun 
    26  12:10  Moon at Perigee: 366623 km
    27  05:18  Moon at Ascending Node 
    27  09     Mercury at Inferior Conjunction 
    27  20:57  Beehive 0.8°N of Moon
    29  09     Mercury at Perihelion 
    29  09:27  Regulus 2.3°S of Moon
    30  00:19  LAST QUARTER MOON 

Dec 03  18:42  Venus 3.6°S of Moon
    05  21:06  Mercury 1.9°S of Moon
    07  07:20  NEW MOON 
    09  05:30  Saturn 1.1°S of Moon: Occn.
    10  17:57  Moon at Descending Node 
    12  12:25  Moon at Apogee: 405177 km
    14  12     Geminid Meteor Shower
    14  23:21  Mars 3.6°N of Moon
    15  11     Mercury at Greatest Elong: 21.3°W
    15  11:49  FIRST QUARTER MOON 
    21  07:31  Aldebaran 1.7°S of Moon
    21  20     Mercury 0.8° of Jupiter
    21  22:22  Winter Solstice 
    22  08:05  Mercury 5.8°N of Antares
    22  15:03  Jupiter 5.1°N of Antares
    22  17:49  FULL MOON 
    22  21     Ursid Meteor Shower
    24  09:52  Moon at Perigee: 361060 km
    24  11:54  Moon at Ascending Node 
    25  04:52  Beehive 0.6°N of Moon
    26  16:06  Regulus 2.5°S of Moon
    26  18     Venus at Perihelion 
    29  09:34  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:


Return to: Planetary Ephemeris Data