2018 Calendar of Astronomical Events



2018 Phases of the Moon

Hawaiian 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
Hawaiian Standard Time
New Moon First Quarter Full Moon Last Quarter
-- Jan 1 16:24 Jan 8 12:25
Jan 16 16:17 Jan 24 12:20 Jan 31 03:27 t Feb 7 05:54
Feb 15 11:05 P Feb 22 22:09 Mar 1 14:51 Mar 9 01:20
Mar 17 03:12 Mar 24 05:35 Mar 31 02:37 Apr 7 21:18
Apr 15 15:57 Apr 22 11:46 Apr 29 14:58 May 7 16:09
May 15 01:48 May 21 17:49 May 29 04:20 Jun 6 08:32
Jun 13 09:43 Jun 20 00:51 Jun 27 18:53 Jul 5 21:51
Jul 12 16:48 P Jul 19 09:52 Jul 27 10:20 t Aug 4 08:18
Aug 10 23:58 P Aug 17 21:49 Aug 26 01:56 Sep 2 16:37
Sep 9 08:01 Sep 16 13:15 Sep 24 16:53 Oct 1 23:45
Oct 8 17:47 Oct 16 08:02 Oct 24 06:45 Oct 31 06:40
Nov 7 06:02 Nov 15 04:54 Nov 22 19:39 Nov 29 14:19
Dec 6 21:20 Dec 15 01:49 Dec 22 07:49 Dec 28 23:34

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

Hawaiian 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     HST   Event
        (h:m)

Jan 01  10     Mercury at Greatest Elong: 22.7°W
    01  11:54  Moon at Perigee: 356566 km
    01  16:24  FULL MOON 
    02  20     Earth at Perihelion: 0.98329 AU
    03  09:50  Beehive 2.3°N of Moon
    03  10     Quadrantid Meteor Shower
    03  21:48  Moon at Ascending Node 
    04  21:24  Regulus 0.9°S of Moon
    08  12:25  LAST QUARTER MOON 
    08  20     Venus at Superior Conjunction 
    10  19:59  Jupiter 4.3°S of Moon
    11  00:03  Mars 4.6°S of Moon
    12  22     Mercury 0.7° of Saturn
    14  16:10  Moon at Apogee: 406461 km
    14  16:13  Saturn 2.6°S of Moon
    14  21:24  Mercury 3.4°S of Moon
    16  16:17  NEW MOON 
    18  04:28  Moon at Descending Node 
    23  07     Venus at Aphelion 
    24  12:20  FIRST QUARTER MOON 
    25  01     Mercury at Aphelion 
    27  00:09  Aldebaran 0.7°S of Moon
    29  23:54  Moon at Perigee: 358995 km
    30  21:19  Beehive 2.3°N of Moon
    31  03:27  FULL MOON 
    31  03:30  Total Lunar Eclipse; mag=1.315
    31  08:46  Moon at Ascending Node 

Feb 01  08:24  Regulus 0.9°S of Moon
    07  05:54  LAST QUARTER MOON 
    07  09:47  Jupiter 4.3°S of Moon
    08  19:12  Mars 4.4°S of Moon
    11  04:16  Moon at Apogee: 405701 km
    11  04:46  Saturn 2.5°S of Moon
    11  06:40  Mars 5.0°N of Antares
    14  11:11  Moon at Descending Node 
    15  10:51  Partial Solar Eclipse; mag=0.599
    15  11:05  NEW MOON 
    17  02     Mercury at Superior Conjunction 
    22  22:09  FIRST QUARTER MOON 
    23  07:07  Aldebaran 0.7°S of Moon
    27  04:48  Moon at Perigee: 363938 km
    27  07:28  Beehive 2.3°N of Moon
    27  19:03  Moon at Ascending Node 
    28  19:09  Regulus 0.9°S of Moon

Mar 01  14:51  FULL MOON 
    03  20     Mercury 1.1° of Venus
    04  04     Neptune in Conjunction with Sun 
    06  20:57  Jupiter 4.1°S of Moon
    09  01:20  LAST QUARTER MOON 
    09  14:37  Mars 3.8°S of Moon
    10  01     Mercury at Perihelion 
    10  16:37  Saturn 2.2°S of Moon
    10  23:13  Moon at Apogee: 404682 km
    13  17:47  Moon at Descending Node 
    15  05     Mercury at Greatest Elong: 18.4°E
    17  03:12  NEW MOON 
    18  09:07  Venus 3.7°N of Moon
    18  22     Mercury 3.8° of Venus
    20  06:15  Vernal Equinox 
    22  12:33  Aldebaran 0.9°S of Moon
    24  05:35  FIRST QUARTER MOON 
    26  07:17  Moon at Perigee: 369104 km
    26  14:52  Beehive 2.2°N of Moon
    27  00:56  Moon at Ascending Node 
    28  03:38  Regulus 1.0°S of Moon
    31  02:37  FULL MOON 

Apr 01  08     Mercury at Inferior Conjunction 
    03  04:14  Jupiter 3.9°S of Moon
    03  07     Saturn at Aphelion 
    07  02:50  Saturn 1.9°S of Moon
    07  08:15  Mars 3.1°S of Moon
    07  19:32  Moon at Apogee: 404145 km
    07  21:18  LAST QUARTER MOON 
    09  22:09  Moon at Descending Node 
    13  23:24  Mercury 3.9°N of Moon
    15  15:57  NEW MOON 
    17  09:29  Venus 5.4°N of Moon
    18  05     Uranus in Conjunction with Sun 
    18  18:45  Aldebaran 1.1°S of Moon
    20  04:44  Moon at Perigee: 368713 km
    22  08     Lyrid Meteor Shower
    22  11:46  FIRST QUARTER MOON 
    22  20:17  Beehive 1.9°N of Moon
    23  02:19  Moon at Ascending Node 
    24  06:47  Venus 3.4°S of Pleiades
    24  09:39  Regulus 1.2°S of Moon
    29  08     Mercury at Greatest Elong: 27.0°W
    29  14:58  FULL MOON 
    30  07:16  Jupiter 3.8°S of Moon

May 02  03:29  Venus 6.3°N of Aldebaran
    04  10:31  Saturn 1.7°S of Moon
    04  21     Eta-Aquarid Meteor Shower
    05  14:35  Moon at Apogee: 404458 km
    05  21:24  Mars 2.7°S of Moon
    07  00:23  Moon at Descending Node 
    07  16:09  LAST QUARTER MOON 
    08  14     Jupiter at Opposition 
    13  07:21  Mercury 2.4°N of Moon
    15  01:48  NEW MOON 
    15  15     Venus at Perihelion 
    17  08:11  Venus 4.8°N of Moon
    17  11:06  Moon at Perigee: 363777 km
    20  01:57  Beehive 1.7°N of Moon
    20  03:13  Moon at Ascending Node 
    21  14:53  Regulus 1.4°S of Moon
    21  17:49  FIRST QUARTER MOON 
    27  07:39  Jupiter 4.0°S of Moon
    29  04:20  FULL MOON 
    31  15:20  Saturn 1.6°S of Moon

Jun 02  06:34  Moon at Apogee: 405316 km
    03  01:58  Mars 3.2°S of Moon
    03  02:39  Moon at Descending Node 
    05  16     Mercury at Superior Conjunction 
    06  00     Mercury at Perihelion 
    06  08:32  LAST QUARTER MOON 
    07  17:37  Venus 4.6°S of Pollux
    13  09:43  NEW MOON 
    14  13:55  Moon at Perigee: 359507 km
    16  03:13  Venus 2.3°N of Moon
    16  07:50  Moon at Ascending Node 
    16  09:38  Beehive 1.5°N of Moon
    17  21:25  Regulus 1.7°S of Moon
    19  16:21  Venus 0.4°N of Beehive
    20  00:51  FIRST QUARTER MOON 
    21  00:07  Summer Solstice 
    23  08:47  Jupiter 4.2°S of Moon
    24  11:37  Mercury 4.7°S of Pollux
    27  02     Saturn at Opposition 
    27  17:59  Saturn 1.8°S of Moon
    27  18:53  FULL MOON 
    29  16:43  Moon at Apogee: 406061 km
    30  06:44  Moon at Descending Node 
    30  15:43  Mars 4.8°S of Moon

Date     HST   Event
        (h:m)

Jul 03  19:39  Mercury 0.6°S of Beehive
    05  21:51  LAST QUARTER MOON 
    06  07     Earth at Aphelion: 1.01670 AU
    09  13:34  Venus 0.9°N of Regulus
    09  23:30  Aldebaran 1.1°S of Moon
    11  19     Mercury at Greatest Elong: 26.4°E
    12  16:48  NEW MOON 
    12  17:01  Partial Solar Eclipse; mag=0.337
    12  22:28  Moon at Perigee: 357432 km
    13  16:50  Moon at Ascending Node 
    14  12:04  Mercury 2.2°S of Moon
    15  06:14  Regulus 1.7°S of Moon
    15  17:31  Venus 1.6°S of Moon
    19  09:52  FIRST QUARTER MOON 
    20  00     Mercury at Aphelion 
    20  13:57  Jupiter 4.4°S of Moon
    24  06:49  Mercury 1.2°S of Regulus
    24  20:10  Saturn 2.0°S of Moon
    26  20     Mars at Opposition 
    26  19:44  Moon at Apogee: 406223 km
    27  10:20  FULL MOON 
    27  10:22  Total Lunar Eclipse; mag=1.609
    27  12:40  Moon at Descending Node 
    27  23     Delta-Aquarid Meteor Shower

Aug 04  08:18  LAST QUARTER MOON 
    06  08:35  Aldebaran 1.1°S of Moon
    08  16     Mercury at Inferior Conjunction 
    10  03:40  Moon at Ascending Node 
    10  08:05  Moon at Perigee: 358083 km
    10  23:46  Partial Solar Eclipse; mag=0.737
    10  23:58  NEW MOON 
    12  15     Perseid Meteor Shower
    14  03:35  Venus 6.3°S of Moon
    17  00:38  Jupiter 4.5°S of Moon
    17  06     Venus at Greatest Elong: 45.9°E
    17  21:49  FIRST QUARTER MOON 
    20  16:09  Mercury 4.8°S of Beehive
    20  23:55  Saturn 2.1°S of Moon
    23  01:23  Moon at Apogee: 405744 km
    23  18:51  Moon at Descending Node 
    26  01:56  FULL MOON 
    26  10     Mercury at Greatest Elong: 18.3°W
    31  18:45  Venus 1.0°S of Spica

Sep 02  00     Mercury at Perihelion 
    02  15:34  Aldebaran 1.2°S of Moon
    02  16:37  LAST QUARTER MOON 
    06  12:42  Moon at Ascending Node 
    06  16:13  Beehive 1.4°N of Moon
    07  07     Neptune at Opposition 
    07  15:21  Moon at Perigee: 361355 km
    09  08:01  NEW MOON 
    13  16:21  Jupiter 4.4°S of Moon
    16  02     Mars at Perihelion 
    16  13:15  FIRST QUARTER MOON 
    17  06:46  Saturn 2.1°S of Moon
    19  14:54  Moon at Apogee: 404875 km
    19  20:38  Mars 4.8°S of Moon
    19  23:30  Moon at Descending Node 
    20  16     Mercury at Superior Conjunction 
    22  15:54  Autumnal Equinox 
    24  16:52  FULL MOON 
    29  21:06  Aldebaran 1.4°S of Moon

Oct 01  23:45  LAST QUARTER MOON 
    03  17:10  Moon at Ascending Node 
    03  23:51  Beehive 1.3°N of Moon
    05  11:58  Regulus 1.8°S of Moon
    05  12:29  Moon at Perigee: 366396 km
    08  17:47  NEW MOON 
    11  11:21  Jupiter 4.1°S of Moon
    14  17:01  Saturn 1.8°S of Moon
    15  17     Mercury 6.2° of Venus
    16  08:02  FIRST QUARTER MOON 
    17  02:03  Moon at Descending Node 
    17  09:16  Moon at Apogee: 404227 km
    18  03:01  Mars 1.9°S of Moon
    21  07     Orionid Meteor Shower
    23  15     Uranus at Opposition 
    24  06:45  FULL MOON 
    26  04     Venus at Inferior Conjunction 
    27  03:04  Aldebaran 1.6°S of Moon
    28  20     Mercury 3.1° of Jupiter
    30  17:46  Moon at Ascending Node 
    31  05:24  Beehive 1.0°N of Moon
    31  06:40  LAST QUARTER MOON 
    31  10:05  Moon at Perigee: 370201 km

Nov 01  18:16  Regulus 2.1°S of Moon
    05  08     S Taurid Meteor Shower
    06  05     Mercury at Greatest Elong: 23.3°E
    07  06:02  NEW MOON 
    08  18:58  Mercury 1.8°N of Antares
    11  05:46  Saturn 1.4°S of Moon
    12  07     N Taurid Meteor Shower
    13  04:04  Moon at Descending Node 
    14  05:57  Moon at Apogee: 404341 km
    14  13:14  Venus 0.2°S of Spica
    15  04:54  FIRST QUARTER MOON 
    15  18:16  Mars 1.0°N of Moon: Occn.
    17  13     Leonid Meteor Shower
    22  19:39  FULL MOON 
    23  11:11  Aldebaran 1.7°S of Moon
    25  20     Jupiter in Conjunction with Sun 
    26  02:10  Moon at Perigee: 366623 km
    26  19:18  Moon at Ascending Node 
    26  23     Mercury at Inferior Conjunction 
    27  10:57  Beehive 0.8°N of Moon
    28  23     Mercury at Perihelion 
    28  23:27  Regulus 2.3°S of Moon
    29  14:19  LAST QUARTER MOON 

Dec 03  08:42  Venus 3.6°S of Moon
    05  11:06  Mercury 1.9°S of Moon
    06  21:20  NEW MOON 
    08  19:30  Saturn 1.1°S of Moon: Occn.
    10  07:57  Moon at Descending Node 
    12  02:25  Moon at Apogee: 405177 km
    14  02     Geminid Meteor Shower
    14  13:21  Mars 3.6°N of Moon
    15  01     Mercury at Greatest Elong: 21.3°W
    15  01:49  FIRST QUARTER MOON 
    20  21:31  Aldebaran 1.7°S of Moon
    21  10     Mercury 0.8° of Jupiter
    21  12:22  Winter Solstice 
    21  22:05  Mercury 5.8°N of Antares
    22  05:03  Jupiter 5.1°N of Antares
    22  07:49  FULL MOON 
    22  11     Ursid Meteor Shower
    23  23:52  Moon at Perigee: 361060 km
    24  01:54  Moon at Ascending Node 
    24  18:52  Beehive 0.6°N of Moon
    26  06:06  Regulus 2.5°S of Moon
    26  08     Venus at Perihelion 
    28  23:34  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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