2018 Calendar of Astronomical Events




    


2018 Phases of the Moon

Alaska 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
Alaska Standard Time
New Moon First Quarter Full Moon Last Quarter
-- Jan 1 17:24 Jan 8 13:25
Jan 16 17:17 Jan 24 13:20 Jan 31 04:27 t Feb 7 06:54
Feb 15 12:05 P Feb 22 23:09 Mar 1 15:51 Mar 9 02:20
Mar 17 04:12 Mar 24 06:35 Mar 31 03:37 Apr 7 22:18
Apr 15 16:57 Apr 22 12:46 Apr 29 15:58 May 7 17:09
May 15 02:48 May 21 18:49 May 29 05:20 Jun 6 09:32
Jun 13 10:43 Jun 20 01:51 Jun 27 19:53 Jul 5 22:51
Jul 12 17:48 P Jul 19 10:52 Jul 27 11:20 t Aug 4 09:18
Aug 11 00:58 P Aug 17 22:49 Aug 26 02:56 Sep 2 17:37
Sep 9 09:01 Sep 16 14:15 Sep 24 17:53 Oct 2 00:45
Oct 8 18:47 Oct 16 09:02 Oct 24 07:45 Oct 31 07:40
Nov 7 07:02 Nov 15 05:54 Nov 22 20:39 Nov 29 15:19
Dec 6 22:20 Dec 15 02:49 Dec 22 08:49 Dec 29 00:34

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

Alaska 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     AKST   Even
        (h:m)

Jan 01  11     Mercury at Greatest Elong: 22.7°W
    01  12:54  Moon at Perigee: 356566 km
    01  17:24  FULL MOON 
    02  21     Earth at Perihelion: 0.98329 AU
    03  10:50  Beehive 2.3°N of Moon
    03  11     Quadrantid Meteor Shower
    03  22:48  Moon at Ascending Node 
    04  22:24  Regulus 0.9°S of Moon
    08  13:25  LAST QUARTER MOON 
    08  21     Venus at Superior Conjunction 
    10  20:59  Jupiter 4.3°S of Moon
    11  01:03  Mars 4.6°S of Moon
    12  23     Mercury 0.7° of Saturn
    14  17:10  Moon at Apogee: 406461 km
    14  17:13  Saturn 2.6°S of Moon
    14  22:24  Mercury 3.4°S of Moon
    16  17:17  NEW MOON 
    18  05:28  Moon at Descending Node 
    23  08     Venus at Aphelion 
    24  13:20  FIRST QUARTER MOON 
    25  02     Mercury at Aphelion 
    27  01:09  Aldebaran 0.7°S of Moon
    30  00:54  Moon at Perigee: 358995 km
    30  22:19  Beehive 2.3°N of Moon
    31  04:27  FULL MOON 
    31  04:30  Total Lunar Eclipse; mag=1.315
    31  09:46  Moon at Ascending Node 

Feb 01  09:24  Regulus 0.9°S of Moon
    07  06:54  LAST QUARTER MOON 
    07  10:47  Jupiter 4.3°S of Moon
    08  20:12  Mars 4.4°S of Moon
    11  05:16  Moon at Apogee: 405701 km
    11  05:46  Saturn 2.5°S of Moon
    11  07:40  Mars 5.0°N of Antares
    14  12:11  Moon at Descending Node 
    15  11:51  Partial Solar Eclipse; mag=0.599
    15  12:05  NEW MOON 
    17  03     Mercury at Superior Conjunction 
    22  23:09  FIRST QUARTER MOON 
    23  08:07  Aldebaran 0.7°S of Moon
    27  05:48  Moon at Perigee: 363938 km
    27  08:28  Beehive 2.3°N of Moon
    27  20:03  Moon at Ascending Node 
    28  20:09  Regulus 0.9°S of Moon

Mar 01  15:51  FULL MOON 
    03  21     Mercury 1.1° of Venus
    04  05     Neptune in Conjunction with Sun 
    06  21:57  Jupiter 4.1°S of Moon
    09  02:20  LAST QUARTER MOON 
    09  15:37  Mars 3.8°S of Moon
    10  02     Mercury at Perihelion 
    10  17:37  Saturn 2.2°S of Moon
    11  00:13  Moon at Apogee: 404682 km
    13  18:47  Moon at Descending Node 
    15  06     Mercury at Greatest Elong: 18.4°E
    17  04:12  NEW MOON 
    18  10:07  Venus 3.7°N of Moon
    18  23     Mercury 3.8° of Venus
    20  07:15  Vernal Equinox 
    22  13:33  Aldebaran 0.9°S of Moon
    24  06:35  FIRST QUARTER MOON 
    26  08:17  Moon at Perigee: 369104 km
    26  15:52  Beehive 2.2°N of Moon
    27  01:56  Moon at Ascending Node 
    28  04:38  Regulus 1.0°S of Moon
    31  03:37  FULL MOON 

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

May 02  04:29  Venus 6.3°N of Aldebaran
    04  11:31  Saturn 1.7°S of Moon
    04  22     Eta-Aquarid Meteor Shower
    05  15:35  Moon at Apogee: 404458 km
    05  22:24  Mars 2.7°S of Moon
    07  01:23  Moon at Descending Node 
    07  17:09  LAST QUARTER MOON 
    08  15     Jupiter at Opposition 
    13  08:21  Mercury 2.4°N of Moon
    15  02:48  NEW MOON 
    15  16     Venus at Perihelion 
    17  09:11  Venus 4.8°N of Moon
    17  12:06  Moon at Perigee: 363777 km
    20  02:57  Beehive 1.7°N of Moon
    20  04:13  Moon at Ascending Node 
    21  15:53  Regulus 1.4°S of Moon
    21  18:49  FIRST QUARTER MOON 
    27  08:39  Jupiter 4.0°S of Moon
    29  05:20  FULL MOON 
    31  16:20  Saturn 1.6°S of Moon

Jun 02  07:34  Moon at Apogee: 405316 km
    03  02:58  Mars 3.2°S of Moon
    03  03:39  Moon at Descending Node 
    05  17     Mercury at Superior Conjunction 
    06  01     Mercury at Perihelion 
    06  09:32  LAST QUARTER MOON 
    07  18:37  Venus 4.6°S of Pollux
    13  10:43  NEW MOON 
    14  14:55  Moon at Perigee: 359507 km
    16  04:13  Venus 2.3°N of Moon
    16  08:50  Moon at Ascending Node 
    16  10:38  Beehive 1.5°N of Moon
    17  22:25  Regulus 1.7°S of Moon
    19  17:21  Venus 0.4°N of Beehive
    20  01:51  FIRST QUARTER MOON 
    21  01:07  Summer Solstice 
    23  09:47  Jupiter 4.2°S of Moon
    24  12:37  Mercury 4.7°S of Pollux
    27  03     Saturn at Opposition 
    27  18:59  Saturn 1.8°S of Moon
    27  19:53  FULL MOON 
    29  17:43  Moon at Apogee: 406061 km
    30  07:44  Moon at Descending Node 
    30  16:43  Mars 4.8°S of Moon

Date     AKST   Even
        (h:m)

Jul 03  20:39  Mercury 0.6°S of Beehive
    05  22:51  LAST QUARTER MOON 
    06  08     Earth at Aphelion: 1.01670 AU
    09  14:34  Venus 0.9°N of Regulus
    10  00:30  Aldebaran 1.1°S of Moon
    11  20     Mercury at Greatest Elong: 26.4°E
    12  17:48  NEW MOON 
    12  18:01  Partial Solar Eclipse; mag=0.337
    12  23:28  Moon at Perigee: 357432 km
    13  17:50  Moon at Ascending Node 
    14  13:04  Mercury 2.2°S of Moon
    15  07:14  Regulus 1.7°S of Moon
    15  18:31  Venus 1.6°S of Moon
    19  10:52  FIRST QUARTER MOON 
    20  01     Mercury at Aphelion 
    20  14:57  Jupiter 4.4°S of Moon
    24  07:49  Mercury 1.2°S of Regulus
    24  21:10  Saturn 2.0°S of Moon
    26  21     Mars at Opposition 
    26  20:44  Moon at Apogee: 406223 km
    27  11:20  FULL MOON 
    27  11:22  Total Lunar Eclipse; mag=1.609
    27  13:40  Moon at Descending Node 
    28  00     Delta-Aquarid Meteor Shower

Aug 04  09:18  LAST QUARTER MOON 
    06  09:35  Aldebaran 1.1°S of Moon
    08  17     Mercury at Inferior Conjunction 
    10  04:40  Moon at Ascending Node 
    10  09:05  Moon at Perigee: 358083 km
    11  00:46  Partial Solar Eclipse; mag=0.737
    11  00:58  NEW MOON 
    12  16     Perseid Meteor Shower
    14  04:35  Venus 6.3°S of Moon
    17  01:38  Jupiter 4.5°S of Moon
    17  07     Venus at Greatest Elong: 45.9°E
    17  22:49  FIRST QUARTER MOON 
    20  17:09  Mercury 4.8°S of Beehive
    21  00:55  Saturn 2.1°S of Moon
    23  02:23  Moon at Apogee: 405744 km
    23  19:51  Moon at Descending Node 
    26  02:56  FULL MOON 
    26  11     Mercury at Greatest Elong: 18.3°W
    31  19:45  Venus 1.0°S of Spica

Sep 02  01     Mercury at Perihelion 
    02  16:34  Aldebaran 1.2°S of Moon
    02  17:37  LAST QUARTER MOON 
    06  13:42  Moon at Ascending Node 
    06  17:13  Beehive 1.4°N of Moon
    07  08     Neptune at Opposition 
    07  16:21  Moon at Perigee: 361355 km
    09  09:01  NEW MOON 
    13  17:21  Jupiter 4.4°S of Moon
    16  03     Mars at Perihelion 
    16  14:15  FIRST QUARTER MOON 
    17  07:46  Saturn 2.1°S of Moon
    19  15:54  Moon at Apogee: 404875 km
    19  21:38  Mars 4.8°S of Moon
    20  00:30  Moon at Descending Node 
    20  17     Mercury at Superior Conjunction 
    22  16:54  Autumnal Equinox 
    24  17:52  FULL MOON 
    29  22:06  Aldebaran 1.4°S of Moon

Oct 02  00:45  LAST QUARTER MOON 
    03  18:10  Moon at Ascending Node 
    04  00:51  Beehive 1.3°N of Moon
    05  12:58  Regulus 1.8°S of Moon
    05  13:29  Moon at Perigee: 366396 km
    08  18:47  NEW MOON 
    11  12:21  Jupiter 4.1°S of Moon
    14  18:01  Saturn 1.8°S of Moon
    15  18     Mercury 6.2° of Venus
    16  09:02  FIRST QUARTER MOON 
    17  03:03  Moon at Descending Node 
    17  10:16  Moon at Apogee: 404227 km
    18  04:01  Mars 1.9°S of Moon
    21  08     Orionid Meteor Shower
    23  16     Uranus at Opposition 
    24  07:45  FULL MOON 
    26  05     Venus at Inferior Conjunction 
    27  04:04  Aldebaran 1.6°S of Moon
    28  21     Mercury 3.1° of Jupiter
    30  18:46  Moon at Ascending Node 
    31  06:24  Beehive 1.0°N of Moon
    31  07:40  LAST QUARTER MOON 
    31  11:05  Moon at Perigee: 370201 km

Nov 01  19:16  Regulus 2.1°S of Moon
    05  09     S Taurid Meteor Shower
    06  06     Mercury at Greatest Elong: 23.3°E
    07  07:02  NEW MOON 
    08  19:58  Mercury 1.8°N of Antares
    11  06:46  Saturn 1.4°S of Moon
    12  08     N Taurid Meteor Shower
    13  05:04  Moon at Descending Node 
    14  06:57  Moon at Apogee: 404341 km
    14  14:14  Venus 0.2°S of Spica
    15  05:54  FIRST QUARTER MOON 
    15  19:16  Mars 1.0°N of Moon: Occn.
    17  14     Leonid Meteor Shower
    22  20:39  FULL MOON 
    23  12:11  Aldebaran 1.7°S of Moon
    25  21     Jupiter in Conjunction with Sun 
    26  03:10  Moon at Perigee: 366623 km
    26  20:18  Moon at Ascending Node 
    27  00     Mercury at Inferior Conjunction 
    27  11:57  Beehive 0.8°N of Moon
    29  00     Mercury at Perihelion 
    29  00:27  Regulus 2.3°S of Moon
    29  15:19  LAST QUARTER MOON 

Dec 03  09:42  Venus 3.6°S of Moon
    05  12:06  Mercury 1.9°S of Moon
    06  22:20  NEW MOON 
    08  20:30  Saturn 1.1°S of Moon: Occn.
    10  08:57  Moon at Descending Node 
    12  03:25  Moon at Apogee: 405177 km
    14  03     Geminid Meteor Shower
    14  14:21  Mars 3.6°N of Moon
    15  02     Mercury at Greatest Elong: 21.3°W
    15  02:49  FIRST QUARTER MOON 
    20  22:31  Aldebaran 1.7°S of Moon
    21  11     Mercury 0.8° of Jupiter
    21  13:22  Winter Solstice 
    21  23:05  Mercury 5.8°N of Antares
    22  06:03  Jupiter 5.1°N of Antares
    22  08:49  FULL MOON 
    22  12     Ursid Meteor Shower
    24  00:52  Moon at Perigee: 361060 km
    24  02:54  Moon at Ascending Node 
    24  19:52  Beehive 0.6°N of Moon
    26  07:06  Regulus 2.5°S of Moon
    26  09     Venus at Perihelion 
    29  00:34  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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