2018 Calendar of Astronomical Events




    


2018 Phases of the Moon

Atlantic 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
Atlantic Standard Time
New Moon First Quarter Full Moon Last Quarter
-- Jan 1 22:24 Jan 8 18:25
Jan 16 22:17 Jan 24 18:20 Jan 31 09:27 t Feb 7 11:54
Feb 15 17:05 P Feb 23 04:09 Mar 1 20:51 Mar 9 07:20
Mar 17 09:12 Mar 24 11:35 Mar 31 08:37 Apr 8 03:18
Apr 15 21:57 Apr 22 17:46 Apr 29 20:58 May 7 22:09
May 15 07:48 May 21 23:49 May 29 10:20 Jun 6 14:32
Jun 13 15:43 Jun 20 06:51 Jun 28 00:53 Jul 6 03:51
Jul 12 22:48 P Jul 19 15:52 Jul 27 16:20 t Aug 4 14:18
Aug 11 05:58 P Aug 18 03:49 Aug 26 07:56 Sep 2 22:37
Sep 9 14:01 Sep 16 19:15 Sep 24 22:53 Oct 2 05:45
Oct 8 23:47 Oct 16 14:02 Oct 24 12:45 Oct 31 12:40
Nov 7 12:02 Nov 15 10:54 Nov 23 01:39 Nov 29 20:19
Dec 7 03:20 Dec 15 07:49 Dec 22 13:49 Dec 29 05:34

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

Atlantic 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     AST   Event
        (h:m)

Jan 01  16     Mercury at Greatest Elong: 22.7°W
    01  17:54  Moon at Perigee: 356566 km
    01  22:24  FULL MOON 
    03  02     Earth at Perihelion: 0.98329 AU
    03  15:50  Beehive 2.3°N of Moon
    03  16     Quadrantid Meteor Shower
    04  03:48  Moon at Ascending Node 
    05  03:24  Regulus 0.9°S of Moon
    08  18:25  LAST QUARTER MOON 
    09  02     Venus at Superior Conjunction 
    11  01:59  Jupiter 4.3°S of Moon
    11  06:03  Mars 4.6°S of Moon
    13  04     Mercury 0.7° of Saturn
    14  22:10  Moon at Apogee: 406461 km
    14  22:13  Saturn 2.6°S of Moon
    15  03:24  Mercury 3.4°S of Moon
    16  22:17  NEW MOON 
    18  10:28  Moon at Descending Node 
    23  13     Venus at Aphelion 
    24  18:20  FIRST QUARTER MOON 
    25  07     Mercury at Aphelion 
    27  06:09  Aldebaran 0.7°S of Moon
    30  05:54  Moon at Perigee: 358995 km
    31  03:19  Beehive 2.3°N of Moon
    31  09:27  FULL MOON 
    31  09:30  Total Lunar Eclipse; mag=1.315
    31  14:46  Moon at Ascending Node 

Feb 01  14:24  Regulus 0.9°S of Moon
    07  11:54  LAST QUARTER MOON 
    07  15:47  Jupiter 4.3°S of Moon
    09  01:12  Mars 4.4°S of Moon
    11  10:16  Moon at Apogee: 405701 km
    11  10:46  Saturn 2.5°S of Moon
    11  12:40  Mars 5.0°N of Antares
    14  17:11  Moon at Descending Node 
    15  16:51  Partial Solar Eclipse; mag=0.599
    15  17:05  NEW MOON 
    17  08     Mercury at Superior Conjunction 
    23  04:09  FIRST QUARTER MOON 
    23  13:07  Aldebaran 0.7°S of Moon
    27  10:48  Moon at Perigee: 363938 km
    27  13:28  Beehive 2.3°N of Moon
    28  01:03  Moon at Ascending Node 

Mar 01  01:09  Regulus 0.9°S of Moon
    01  20:51  FULL MOON 
    04  02     Mercury 1.1° of Venus
    04  10     Neptune in Conjunction with Sun 
    07  02:57  Jupiter 4.1°S of Moon
    09  07:20  LAST QUARTER MOON 
    09  20:37  Mars 3.8°S of Moon
    10  07     Mercury at Perihelion 
    10  22:37  Saturn 2.2°S of Moon
    11  05:13  Moon at Apogee: 404682 km
    13  23:47  Moon at Descending Node 
    15  11     Mercury at Greatest Elong: 18.4°E
    17  09:12  NEW MOON 
    18  15:07  Venus 3.7°N of Moon
    19  04     Mercury 3.8° of Venus
    20  12:15  Vernal Equinox 
    22  18:33  Aldebaran 0.9°S of Moon
    24  11:35  FIRST QUARTER MOON 
    26  13:17  Moon at Perigee: 369104 km
    26  20:52  Beehive 2.2°N of Moon
    27  06:56  Moon at Ascending Node 
    28  09:38  Regulus 1.0°S of Moon
    31  08:37  FULL MOON 

Apr 01  14     Mercury at Inferior Conjunction 
    03  10:14  Jupiter 3.9°S of Moon
    03  13     Saturn at Aphelion 
    07  08:50  Saturn 1.9°S of Moon
    07  14:15  Mars 3.1°S of Moon
    08  01:32  Moon at Apogee: 404145 km
    08  03:18  LAST QUARTER MOON 
    10  04:09  Moon at Descending Node 
    14  05:24  Mercury 3.9°N of Moon
    15  21:57  NEW MOON 
    17  15:29  Venus 5.4°N of Moon
    18  11     Uranus in Conjunction with Sun 
    19  00:45  Aldebaran 1.1°S of Moon
    20  10:44  Moon at Perigee: 368713 km
    22  14     Lyrid Meteor Shower
    22  17:46  FIRST QUARTER MOON 
    23  02:17  Beehive 1.9°N of Moon
    23  08:19  Moon at Ascending Node 
    24  12:47  Venus 3.4°S of Pleiades
    24  15:39  Regulus 1.2°S of Moon
    29  14     Mercury at Greatest Elong: 27.0°W
    29  20:58  FULL MOON 
    30  13:16  Jupiter 3.8°S of Moon

May 02  09:29  Venus 6.3°N of Aldebaran
    04  16:31  Saturn 1.7°S of Moon
    05  03     Eta-Aquarid Meteor Shower
    05  20:35  Moon at Apogee: 404458 km
    06  03:24  Mars 2.7°S of Moon
    07  06:23  Moon at Descending Node 
    07  22:09  LAST QUARTER MOON 
    08  20     Jupiter at Opposition 
    13  13:21  Mercury 2.4°N of Moon
    15  07:48  NEW MOON 
    15  21     Venus at Perihelion 
    17  14:11  Venus 4.8°N of Moon
    17  17:06  Moon at Perigee: 363777 km
    20  07:57  Beehive 1.7°N of Moon
    20  09:13  Moon at Ascending Node 
    21  20:53  Regulus 1.4°S of Moon
    21  23:49  FIRST QUARTER MOON 
    27  13:39  Jupiter 4.0°S of Moon
    29  10:20  FULL MOON 
    31  21:20  Saturn 1.6°S of Moon

Jun 02  12:34  Moon at Apogee: 405316 km
    03  07:58  Mars 3.2°S of Moon
    03  08:39  Moon at Descending Node 
    05  22     Mercury at Superior Conjunction 
    06  06     Mercury at Perihelion 
    06  14:32  LAST QUARTER MOON 
    07  23:37  Venus 4.6°S of Pollux
    13  15:43  NEW MOON 
    14  19:55  Moon at Perigee: 359507 km
    16  09:13  Venus 2.3°N of Moon
    16  13:50  Moon at Ascending Node 
    16  15:38  Beehive 1.5°N of Moon
    18  03:25  Regulus 1.7°S of Moon
    19  22:21  Venus 0.4°N of Beehive
    20  06:51  FIRST QUARTER MOON 
    21  06:07  Summer Solstice 
    23  14:47  Jupiter 4.2°S of Moon
    24  17:37  Mercury 4.7°S of Pollux
    27  08     Saturn at Opposition 
    27  23:59  Saturn 1.8°S of Moon
    28  00:53  FULL MOON 
    29  22:43  Moon at Apogee: 406061 km
    30  12:44  Moon at Descending Node 
    30  21:43  Mars 4.8°S of Moon

Date     AST   Event
        (h:m)

Jul 04  01:39  Mercury 0.6°S of Beehive
    06  03:51  LAST QUARTER MOON 
    06  13     Earth at Aphelion: 1.01670 AU
    09  19:34  Venus 0.9°N of Regulus
    10  05:30  Aldebaran 1.1°S of Moon
    12  01     Mercury at Greatest Elong: 26.4°E
    12  22:48  NEW MOON 
    12  23:01  Partial Solar Eclipse; mag=0.337
    13  04:28  Moon at Perigee: 357432 km
    13  22:50  Moon at Ascending Node 
    14  18:04  Mercury 2.2°S of Moon
    15  12:14  Regulus 1.7°S of Moon
    15  23:31  Venus 1.6°S of Moon
    19  15:52  FIRST QUARTER MOON 
    20  06     Mercury at Aphelion 
    20  19:57  Jupiter 4.4°S of Moon
    24  12:49  Mercury 1.2°S of Regulus
    25  02:10  Saturn 2.0°S of Moon
    27  02     Mars at Opposition 
    27  01:44  Moon at Apogee: 406223 km
    27  16:20  FULL MOON 
    27  16:22  Total Lunar Eclipse; mag=1.609
    27  18:40  Moon at Descending Node 
    28  05     Delta-Aquarid Meteor Shower

Aug 04  14:18  LAST QUARTER MOON 
    06  14:35  Aldebaran 1.1°S of Moon
    08  22     Mercury at Inferior Conjunction 
    10  09:40  Moon at Ascending Node 
    10  14:05  Moon at Perigee: 358083 km
    11  05:46  Partial Solar Eclipse; mag=0.737
    11  05:58  NEW MOON 
    12  21     Perseid Meteor Shower
    14  09:35  Venus 6.3°S of Moon
    17  06:38  Jupiter 4.5°S of Moon
    17  12     Venus at Greatest Elong: 45.9°E
    18  03:49  FIRST QUARTER MOON 
    20  22:09  Mercury 4.8°S of Beehive
    21  05:55  Saturn 2.1°S of Moon
    23  07:23  Moon at Apogee: 405744 km
    24  00:51  Moon at Descending Node 
    26  07:56  FULL MOON 
    26  16     Mercury at Greatest Elong: 18.3°W

Sep 01  00:45  Venus 1.0°S of Spica
    02  06     Mercury at Perihelion 
    02  21:34  Aldebaran 1.2°S of Moon
    02  22:37  LAST QUARTER MOON 
    06  18:42  Moon at Ascending Node 
    06  22:13  Beehive 1.4°N of Moon
    07  13     Neptune at Opposition 
    07  21:21  Moon at Perigee: 361355 km
    09  14:01  NEW MOON 
    13  22:21  Jupiter 4.4°S of Moon
    16  08     Mars at Perihelion 
    16  19:15  FIRST QUARTER MOON 
    17  12:46  Saturn 2.1°S of Moon
    19  20:54  Moon at Apogee: 404875 km
    20  02:38  Mars 4.8°S of Moon
    20  05:30  Moon at Descending Node 
    20  22     Mercury at Superior Conjunction 
    22  21:54  Autumnal Equinox 
    24  22:52  FULL MOON 
    30  03:06  Aldebaran 1.4°S of Moon

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

Nov 02  00:16  Regulus 2.1°S of Moon
    05  14     S Taurid Meteor Shower
    06  11     Mercury at Greatest Elong: 23.3°E
    07  12:02  NEW MOON 
    09  00:58  Mercury 1.8°N of Antares
    11  11:46  Saturn 1.4°S of Moon
    12  13     N Taurid Meteor Shower
    13  10:04  Moon at Descending Node 
    14  11:57  Moon at Apogee: 404341 km
    14  19:14  Venus 0.2°S of Spica
    15  10:54  FIRST QUARTER MOON 
    16  00:16  Mars 1.0°N of Moon: Occn.
    17  19     Leonid Meteor Shower
    23  01:39  FULL MOON 
    23  17:11  Aldebaran 1.7°S of Moon
    26  02     Jupiter in Conjunction with Sun 
    26  08:10  Moon at Perigee: 366623 km
    27  01:18  Moon at Ascending Node 
    27  05     Mercury at Inferior Conjunction 
    27  16:57  Beehive 0.8°N of Moon
    29  05     Mercury at Perihelion 
    29  05:27  Regulus 2.3°S of Moon
    29  20:19  LAST QUARTER MOON 

Dec 03  14:42  Venus 3.6°S of Moon
    05  17:06  Mercury 1.9°S of Moon
    07  03:20  NEW MOON 
    09  01:30  Saturn 1.1°S of Moon: Occn.
    10  13:57  Moon at Descending Node 
    12  08:25  Moon at Apogee: 405177 km
    14  08     Geminid Meteor Shower
    14  19:21  Mars 3.6°N of Moon
    15  07     Mercury at Greatest Elong: 21.3°W
    15  07:49  FIRST QUARTER MOON 
    21  03:31  Aldebaran 1.7°S of Moon
    21  16     Mercury 0.8° of Jupiter
    21  18:22  Winter Solstice 
    22  04:05  Mercury 5.8°N of Antares
    22  11:03  Jupiter 5.1°N of Antares
    22  13:49  FULL MOON 
    22  17     Ursid Meteor Shower
    24  05:52  Moon at Perigee: 361060 km
    24  07:54  Moon at Ascending Node 
    25  00:52  Beehive 0.6°N of Moon
    26  12:06  Regulus 2.5°S of Moon
    26  14     Venus at Perihelion 
    29  05:34  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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