2018 Calendar of Astronomical Events



2018 Phases of the Moon

Eastern 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
Eastern Standard Time
New Moon First Quarter Full Moon Last Quarter
-- Jan 1 21:24 Jan 8 17:25
Jan 16 21:17 Jan 24 17:20 Jan 31 08:27 t Feb 7 10:54
Feb 15 16:05 P Feb 23 03:09 Mar 1 19:51 Mar 9 06:20
Mar 17 08:12 Mar 24 10:35 Mar 31 07:37 Apr 8 02:18
Apr 15 20:57 Apr 22 16:46 Apr 29 19:58 May 7 21:09
May 15 06:48 May 21 22:49 May 29 09:20 Jun 6 13:32
Jun 13 14:43 Jun 20 05:51 Jun 27 23:53 Jul 6 02:51
Jul 12 21:48 P Jul 19 14:52 Jul 27 15:20 t Aug 4 13:18
Aug 11 04:58 P Aug 18 02:49 Aug 26 06:56 Sep 2 21:37
Sep 9 13:01 Sep 16 18:15 Sep 24 21:53 Oct 2 04:45
Oct 8 22:47 Oct 16 13:02 Oct 24 11:45 Oct 31 11:40
Nov 7 11:02 Nov 15 09:54 Nov 23 00:39 Nov 29 19:19
Dec 7 02:20 Dec 15 06:49 Dec 22 12:49 Dec 29 04:34

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

Eastern 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     EST   Event
        (h:m)

Jan 01  15     Mercury at Greatest Elong: 22.7°W
    01  16:54  Moon at Perigee: 356566 km
    01  21:24  FULL MOON 
    03  01     Earth at Perihelion: 0.98329 AU
    03  14:50  Beehive 2.3°N of Moon
    03  15     Quadrantid Meteor Shower
    04  02:48  Moon at Ascending Node 
    05  02:24  Regulus 0.9°S of Moon
    08  17:25  LAST QUARTER MOON 
    09  01     Venus at Superior Conjunction 
    11  00:59  Jupiter 4.3°S of Moon
    11  05:03  Mars 4.6°S of Moon
    13  03     Mercury 0.7° of Saturn
    14  21:10  Moon at Apogee: 406461 km
    14  21:13  Saturn 2.6°S of Moon
    15  02:24  Mercury 3.4°S of Moon
    16  21:17  NEW MOON 
    18  09:28  Moon at Descending Node 
    23  12     Venus at Aphelion 
    24  17:20  FIRST QUARTER MOON 
    25  06     Mercury at Aphelion 
    27  05:09  Aldebaran 0.7°S of Moon
    30  04:54  Moon at Perigee: 358995 km
    31  02:19  Beehive 2.3°N of Moon
    31  08:27  FULL MOON 
    31  08:30  Total Lunar Eclipse; mag=1.315
    31  13:46  Moon at Ascending Node 

Feb 01  13:24  Regulus 0.9°S of Moon
    07  10:54  LAST QUARTER MOON 
    07  14:47  Jupiter 4.3°S of Moon
    09  00:12  Mars 4.4°S of Moon
    11  09:16  Moon at Apogee: 405701 km
    11  09:46  Saturn 2.5°S of Moon
    11  11:40  Mars 5.0°N of Antares
    14  16:11  Moon at Descending Node 
    15  15:51  Partial Solar Eclipse; mag=0.599
    15  16:05  NEW MOON 
    17  07     Mercury at Superior Conjunction 
    23  03:09  FIRST QUARTER MOON 
    23  12:07  Aldebaran 0.7°S of Moon
    27  09:48  Moon at Perigee: 363938 km
    27  12:28  Beehive 2.3°N of Moon
    28  00:03  Moon at Ascending Node 

Mar 01  00:09  Regulus 0.9°S of Moon
    01  19:51  FULL MOON 
    04  01     Mercury 1.1° of Venus
    04  09     Neptune in Conjunction with Sun 
    07  01:57  Jupiter 4.1°S of Moon
    09  06:20  LAST QUARTER MOON 
    09  19:37  Mars 3.8°S of Moon
    10  06     Mercury at Perihelion 
    10  21:37  Saturn 2.2°S of Moon
    11  04:13  Moon at Apogee: 404682 km
    13  22:47  Moon at Descending Node 
    15  10     Mercury at Greatest Elong: 18.4°E
    17  08:12  NEW MOON 
    18  14:07  Venus 3.7°N of Moon
    19  03     Mercury 3.8° of Venus
    20  11:15  Vernal Equinox 
    22  17:33  Aldebaran 0.9°S of Moon
    24  10:35  FIRST QUARTER MOON 
    26  12:17  Moon at Perigee: 369104 km
    26  19:52  Beehive 2.2°N of Moon
    27  05:56  Moon at Ascending Node 
    28  08:38  Regulus 1.0°S of Moon
    31  07:37  FULL MOON 

Apr 01  13     Mercury at Inferior Conjunction 
    03  09:14  Jupiter 3.9°S of Moon
    03  12     Saturn at Aphelion 
    07  07:50  Saturn 1.9°S of Moon
    07  13:15  Mars 3.1°S of Moon
    08  00:32  Moon at Apogee: 404145 km
    08  02:18  LAST QUARTER MOON 
    10  03:09  Moon at Descending Node 
    14  04:24  Mercury 3.9°N of Moon
    15  20:57  NEW MOON 
    17  14:29  Venus 5.4°N of Moon
    18  10     Uranus in Conjunction with Sun 
    18  23:45  Aldebaran 1.1°S of Moon
    20  09:44  Moon at Perigee: 368713 km
    22  13     Lyrid Meteor Shower
    22  16:46  FIRST QUARTER MOON 
    23  01:17  Beehive 1.9°N of Moon
    23  07:19  Moon at Ascending Node 
    24  11:47  Venus 3.4°S of Pleiades
    24  14:39  Regulus 1.2°S of Moon
    29  13     Mercury at Greatest Elong: 27.0°W
    29  19:58  FULL MOON 
    30  12:16  Jupiter 3.8°S of Moon

May 02  08:29  Venus 6.3°N of Aldebaran
    04  15:31  Saturn 1.7°S of Moon
    05  02     Eta-Aquarid Meteor Shower
    05  19:35  Moon at Apogee: 404458 km
    06  02:24  Mars 2.7°S of Moon
    07  05:23  Moon at Descending Node 
    07  21:09  LAST QUARTER MOON 
    08  19     Jupiter at Opposition 
    13  12:21  Mercury 2.4°N of Moon
    15  06:48  NEW MOON 
    15  20     Venus at Perihelion 
    17  13:11  Venus 4.8°N of Moon
    17  16:06  Moon at Perigee: 363777 km
    20  06:57  Beehive 1.7°N of Moon
    20  08:13  Moon at Ascending Node 
    21  19:53  Regulus 1.4°S of Moon
    21  22:49  FIRST QUARTER MOON 
    27  12:39  Jupiter 4.0°S of Moon
    29  09:20  FULL MOON 
    31  20:20  Saturn 1.6°S of Moon

Jun 02  11:34  Moon at Apogee: 405316 km
    03  06:58  Mars 3.2°S of Moon
    03  07:39  Moon at Descending Node 
    05  21     Mercury at Superior Conjunction 
    06  05     Mercury at Perihelion 
    06  13:32  LAST QUARTER MOON 
    07  22:37  Venus 4.6°S of Pollux
    13  14:43  NEW MOON 
    14  18:55  Moon at Perigee: 359507 km
    16  08:13  Venus 2.3°N of Moon
    16  12:50  Moon at Ascending Node 
    16  14:38  Beehive 1.5°N of Moon
    18  02:25  Regulus 1.7°S of Moon
    19  21:21  Venus 0.4°N of Beehive
    20  05:51  FIRST QUARTER MOON 
    21  05:07  Summer Solstice 
    23  13:47  Jupiter 4.2°S of Moon
    24  16:37  Mercury 4.7°S of Pollux
    27  07     Saturn at Opposition 
    27  22:59  Saturn 1.8°S of Moon
    27  23:53  FULL MOON 
    29  21:43  Moon at Apogee: 406061 km
    30  11:44  Moon at Descending Node 
    30  20:43  Mars 4.8°S of Moon

Date     EST   Event
        (h:m)

Jul 04  00:39  Mercury 0.6°S of Beehive
    06  02:51  LAST QUARTER MOON 
    06  12     Earth at Aphelion: 1.01670 AU
    09  18:34  Venus 0.9°N of Regulus
    10  04:30  Aldebaran 1.1°S of Moon
    12  00     Mercury at Greatest Elong: 26.4°E
    12  21:48  NEW MOON 
    12  22:01  Partial Solar Eclipse; mag=0.337
    13  03:28  Moon at Perigee: 357432 km
    13  21:50  Moon at Ascending Node 
    14  17:04  Mercury 2.2°S of Moon
    15  11:14  Regulus 1.7°S of Moon
    15  22:31  Venus 1.6°S of Moon
    19  14:52  FIRST QUARTER MOON 
    20  05     Mercury at Aphelion 
    20  18:57  Jupiter 4.4°S of Moon
    24  11:49  Mercury 1.2°S of Regulus
    25  01:10  Saturn 2.0°S of Moon
    27  01     Mars at Opposition 
    27  00:44  Moon at Apogee: 406223 km
    27  15:20  FULL MOON 
    27  15:22  Total Lunar Eclipse; mag=1.609
    27  17:40  Moon at Descending Node 
    28  04     Delta-Aquarid Meteor Shower

Aug 04  13:18  LAST QUARTER MOON 
    06  13:35  Aldebaran 1.1°S of Moon
    08  21     Mercury at Inferior Conjunction 
    10  08:40  Moon at Ascending Node 
    10  13:05  Moon at Perigee: 358083 km
    11  04:46  Partial Solar Eclipse; mag=0.737
    11  04:58  NEW MOON 
    12  20     Perseid Meteor Shower
    14  08:35  Venus 6.3°S of Moon
    17  05:38  Jupiter 4.5°S of Moon
    17  11     Venus at Greatest Elong: 45.9°E
    18  02:49  FIRST QUARTER MOON 
    20  21:09  Mercury 4.8°S of Beehive
    21  04:55  Saturn 2.1°S of Moon
    23  06:23  Moon at Apogee: 405744 km
    23  23:51  Moon at Descending Node 
    26  06:56  FULL MOON 
    26  15     Mercury at Greatest Elong: 18.3°W
    31  23:45  Venus 1.0°S of Spica

Sep 02  05     Mercury at Perihelion 
    02  20:34  Aldebaran 1.2°S of Moon
    02  21:37  LAST QUARTER MOON 
    06  17:42  Moon at Ascending Node 
    06  21:13  Beehive 1.4°N of Moon
    07  12     Neptune at Opposition 
    07  20:21  Moon at Perigee: 361355 km
    09  13:01  NEW MOON 
    13  21:21  Jupiter 4.4°S of Moon
    16  07     Mars at Perihelion 
    16  18:15  FIRST QUARTER MOON 
    17  11:46  Saturn 2.1°S of Moon
    19  19:54  Moon at Apogee: 404875 km
    20  01:38  Mars 4.8°S of Moon
    20  04:30  Moon at Descending Node 
    20  21     Mercury at Superior Conjunction 
    22  20:54  Autumnal Equinox 
    24  21:52  FULL MOON 
    30  02:06  Aldebaran 1.4°S of Moon

Oct 02  04:45  LAST QUARTER MOON 
    03  22:10  Moon at Ascending Node 
    04  04:51  Beehive 1.3°N of Moon
    05  16:58  Regulus 1.8°S of Moon
    05  17:29  Moon at Perigee: 366396 km
    08  22:47  NEW MOON 
    11  16:21  Jupiter 4.1°S of Moon
    14  22:01  Saturn 1.8°S of Moon
    15  22     Mercury 6.2° of Venus
    16  13:02  FIRST QUARTER MOON 
    17  07:03  Moon at Descending Node 
    17  14:16  Moon at Apogee: 404227 km
    18  08:01  Mars 1.9°S of Moon
    21  12     Orionid Meteor Shower
    23  20     Uranus at Opposition 
    24  11:45  FULL MOON 
    26  09     Venus at Inferior Conjunction 
    27  08:04  Aldebaran 1.6°S of Moon
    29  01     Mercury 3.1° of Jupiter
    30  22:46  Moon at Ascending Node 
    31  10:24  Beehive 1.0°N of Moon
    31  11:40  LAST QUARTER MOON 
    31  15:05  Moon at Perigee: 370201 km

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

Dec 03  13:42  Venus 3.6°S of Moon
    05  16:06  Mercury 1.9°S of Moon
    07  02:20  NEW MOON 
    09  00:30  Saturn 1.1°S of Moon: Occn.
    10  12:57  Moon at Descending Node 
    12  07:25  Moon at Apogee: 405177 km
    14  07     Geminid Meteor Shower
    14  18:21  Mars 3.6°N of Moon
    15  06     Mercury at Greatest Elong: 21.3°W
    15  06:49  FIRST QUARTER MOON 
    21  02:31  Aldebaran 1.7°S of Moon
    21  15     Mercury 0.8° of Jupiter
    21  17:22  Winter Solstice 
    22  03:05  Mercury 5.8°N of Antares
    22  10:03  Jupiter 5.1°N of Antares
    22  12:49  FULL MOON 
    22  16     Ursid Meteor Shower
    24  04:52  Moon at Perigee: 361060 km
    24  06:54  Moon at Ascending Node 
    24  23:52  Beehive 0.6°N of Moon
    26  11:06  Regulus 2.5°S of Moon
    26  13     Venus at Perihelion 
    29  04:34  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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