2017 Calendar of Astronomical Events




    


2017 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.

2017 Phases of the Moon
Greenwich Mean Time
New Moon First Quarter Full Moon Last Quarter
- Jan 5 19:47 Jan 12 11:34 Jan 19 22:14
Jan 28 00:07 Feb 4 04:19 Feb 11 00:33 n Feb 18 19:33
Feb 26 14:58 A Mar 5 11:32 Mar 12 14:54 Mar 20 15:58
Mar 28 02:57 Apr 3 18:39 Apr 11 06:08 Apr 19 09:57
Apr 26 12:16 May 3 02:47 May 10 21:43 May 19 00:33
May 25 19:44 Jun 1 12:42 Jun 9 13:10 Jun 17 11:33
Jun 24 02:31 Jul 1 00:51 Jul 9 04:07 Jul 16 19:26
Jul 23 09:46 Jul 30 15:23 Aug 7 18:11 p Aug 15 01:15
Aug 21 18:30 T Aug 29 08:13 Sep 6 07:03 Sep 13 06:25
Sep 20 05:30 Sep 28 02:54 Oct 5 18:40 Oct 12 12:25
Oct 19 19:12 Oct 27 22:22 Nov 4 05:23 Nov 10 20:37
Nov 18 11:42 Nov 26 17:03 Dec 3 15:47 Dec 10 07:51
Dec 18 06:31 Dec 26 09:20 --

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.



2017 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.

2017 Calendar of Astronomical Events
January - June July - December
Date     GMT   Event
        (h:m)

Jan 02  09:20  Venus 1.9°S of Moon
    02  18:14  Moon at Descending Node 
    03  06:47  Mars 0.2°S of Moon: Occn.
    03  14     Quadrantid Meteor Shower
    04  15     Earth at Perihelion: 0.98331 AU
    05  19:47  FIRST QUARTER MOON 
    09  09     Mercury 6.7° of Saturn
    09  14:07  Aldebaran 0.4°S of Moon
    10  06:07  Moon at Perigee: 363242 km
    12  11:34  FULL MOON 
    12  13     Venus at Greatest Elong: 47.1°E
    13  13:59  Beehive 3.9°N of Moon
    15  04:07  Regulus 0.9°N of Moon
    15  10:44  Moon at Ascending Node 
    19  05:26  Jupiter 2.7°S of Moon
    19  10     Mercury at Greatest Elong: 24.1°W
    19  22:14  LAST QUARTER MOON 
    22  00:14  Moon at Apogee: 404913 km
    24  10:37  Saturn 3.6°S of Moon
    26  00:46  Mercury 3.7°S of Moon
    28  00:07  NEW MOON 
    29  22:21  Moon at Descending Node 
    31  13:11  Jupiter 3.5°N of Spica
    31  14:34  Venus 4.1°N of Moon

Feb 01  01:09  Mars 2.3°N of Moon
    04  04:19  FIRST QUARTER MOON 
    05  21:14  Aldebaran 0.2°S of Moon
    06  13:59  Moon at Perigee: 368817 km
    07  14     Mercury at Aphelion 
    09  23:46  Beehive 3.9°N of Moon
    11  00:33  FULL MOON 
    11  00:44  Pen. Lunar Eclipse; mag=0.988
    11  14:04  Regulus 0.8°N of Moon
    11  19:49  Moon at Ascending Node 
    15  14:55  Jupiter 2.7°S of Moon
    18  19:33  LAST QUARTER MOON 
    18  21     Jupiter at Aphelion 
    18  21:14  Moon at Apogee: 404376 km
    20  16     Venus at Perihelion 
    20  23:44  Saturn 3.6°S of Moon
    26  06:28  Moon at Descending Node 
    26  14:53  Annular Solar Eclipse; mag=0.992
    26  14:58  NEW MOON 

Mar 01  18:58  Mars 4.3°N of Moon
    02  02     Neptune in Conjunction with Sun 
    03  07:24  Moon at Perigee: 369065 km
    05  02:38  Aldebaran 0.2°S of Moon
    05  11:32  FIRST QUARTER MOON 
    07  00     Mercury at Superior Conjunction 
    09  07:12  Beehive 3.9°N of Moon
    10  22:20  Regulus 0.8°N of Moon
    11  04:17  Moon at Ascending Node 
    12  14:54  FULL MOON 
    14  20:04  Jupiter 2.5°S of Moon
    18  17:25  Moon at Apogee: 404651 km
    20  10:29  Vernal Equinox 
    20  10:49  Saturn 3.4°S of Moon
    20  15:58  LAST QUARTER MOON 
    23  14     Mercury at Perihelion 
    25  11     Venus at Inferior Conjunction 
    25  15:41  Moon at Descending Node 
    28  02:57  NEW MOON 
    30  12:39  Moon at Perigee: 363855 km
    30  13:03  Mars 5.5°N of Moon

Apr 01  08:50  Aldebaran 0.3°S of Moon
    01  10     Mercury at Greatest Elong: 19.0°E
    03  18:39  FIRST QUARTER MOON 
    05  12:45  Beehive 3.8°N of Moon
    07  04:30  Regulus 0.7°N of Moon
    07  09:14  Moon at Ascending Node 
    07  21     Jupiter at Opposition 
    10  21:20  Jupiter 2.2°S of Moon
    11  06:08  FULL MOON 
    14  06     Uranus in Conjunction with Sun 
    15  10:05  Moon at Apogee: 405478 km
    16  18:39  Saturn 3.2°S of Moon
    19  09:57  LAST QUARTER MOON 
    20  06     Mercury at Inferior Conjunction 
    21  08:16  Mars 3.4°S of Pleiades
    21  22:30  Moon at Descending Node 
    22  12     Lyrid Meteor Shower
    23  17:59  Venus 5.2°N of Moon
    26  12:16  NEW MOON 
    27  16:18  Moon at Perigee: 359325 km
    28  17:19  Aldebaran 0.5°S of Moon

May 02  18:23  Beehive 3.6°N of Moon
    03  02:47  FIRST QUARTER MOON 
    04  09:49  Regulus 0.5°N of Moon
    04  10:42  Moon at Ascending Node 
    05  01     Eta-Aquarid Meteor Shower
    05  13:51  Mars 6.1°N of Aldebaran
    07  21:24  Jupiter 2.1°S of Moon
    10  21:43  FULL MOON 
    12  19:51  Moon at Apogee: 406212 km
    13  23:07  Saturn 3.1°S of Moon
    17  23     Mercury at Greatest Elong: 25.8°W
    19  00:33  LAST QUARTER MOON 
    19  01:30  Moon at Descending Node 
    22  12:32  Venus 2.4°N of Moon
    24  01:20  Mercury 1.6°N of Moon
    25  19:44  NEW MOON 
    26  01:23  Moon at Perigee: 357210 km
    30  01:50  Beehive 3.4°N of Moon
    31  11:56  Moon at Ascending Node 
    31  16:08  Regulus 0.3°N of Moon

Jun 01  12:42  FIRST QUARTER MOON 
    03  11     Venus at Greatest Elong: 45.9°W
    03  23:57  Jupiter 2.3°S of Moon
    07  03:19  Mercury 5.3°S of Pleiades
    08  22:21  Moon at Apogee: 406402 km
    09  13:10  FULL MOON 
    10  01:25  Saturn 3.1°S of Moon
    13  00     Venus at Aphelion 
    15  02:40  Moon at Descending Node 
    15  09     Saturn at Opposition 
    17  11:33  LAST QUARTER MOON 
    19  13     Mercury at Perihelion 
    20  21:13  Venus 2.4°N of Moon
    21  04:25  Summer Solstice 
    21  14     Mercury at Superior Conjunction 
    22  14:23  Aldebaran 0.5°S of Moon
    23  10:49  Moon at Perigee: 357938 km
    24  02:31  NEW MOON 
    26  11:18  Beehive 3.2°N of Moon
    27  16:26  Moon at Ascending Node 
    28  00:26  Regulus 0.1°N of Moon

Date     GMT   Event
        (h:m)

Jul 01  00:51  FIRST QUARTER MOON 
    01  07:28  Jupiter 2.7°S of Moon
    03  20     Earth at Aphelion: 1.01668 AU
    05  00:21  Venus 6.5°S of Pleiades
    06  04:27  Moon at Apogee: 405934 km
    07  03:34  Saturn 3.2°S of Moon
    09  04:07  FULL MOON 
    10  01:33  Mercury 0.1°N of Beehive
    12  05:17  Moon at Descending Node 
    13  18:03  Venus 3.1°N of Aldebaran
    16  19:26  LAST QUARTER MOON 
    19  23:37  Aldebaran 0.4°S of Moon
    20  11:13  Venus 2.7°N of Moon
    21  17:09  Moon at Perigee: 361238 km
    23  09:46  NEW MOON 
    25  00:46  Moon at Ascending Node 
    25  08:49  Mercury 0.9°S of Moon: Occn.
    25  10:14  Regulus 0.0°S of Moon
    25  17:03  Mercury 0.8°S of Regulus
    27  00     Mars in Conjunction with Sun 
    28  03     Delta-Aquarid Meteor Shower
    28  20:15  Jupiter 3.1°S of Moon
    30  04     Mercury at Greatest Elong: 27.2°E
    30  15:23  FIRST QUARTER MOON 

Aug 02  13     Mercury at Aphelion 
    02  17:55  Moon at Apogee: 405026 km
    03  07:31  Saturn 3.5°S of Moon
    07  18:11  FULL MOON 
    07  18:20  Partial Lunar Eclipse; mag=0.246
    08  10:56  Moon at Descending Node 
    12  19     Perseid Meteor Shower
    15  01:15  LAST QUARTER MOON 
    16  06:39  Aldebaran 0.4°S of Moon
    18  13:14  Moon at Perigee: 366129 km
    19  04:45  Venus 2.2°N of Moon
    20  07:15  Beehive 3.2°N of Moon
    20  18:08  Venus 7.2°S of Pollux
    21  10:34  Moon at Ascending Node 
    21  18:26  Total Solar Eclipse; mag=1.031
    21  18:30  NEW MOON 
    25  13:00  Jupiter 3.5°S of Moon
    26  21     Mercury at Inferior Conjunction 
    29  08:13  FIRST QUARTER MOON 
    30  11:25  Moon at Apogee: 404307 km
    30  14:23  Saturn 3.6°S of Moon

Sep 01  06:08  Venus 1.4°S of Beehive
    04  18:41  Moon at Descending Node 
    05  00     Mercury 3.2° of Mars
    05  04     Neptune at Opposition 
    06  07:03  FULL MOON 
    10  05:30  Mercury 0.7°S of Regulus
    10  21:44  Jupiter 2.9°N of Spica
    12  10     Mercury at Greatest Elong: 17.9°W
    12  12:09  Aldebaran 0.4°S of Moon
    13  06:25  LAST QUARTER MOON 
    13  16:04  Moon at Perigee: 369856 km
    15  12     Mercury at Perihelion 
    16  14:50  Beehive 3.1°N of Moon
    16  18     Mercury 0.1° of Mars
    17  18:28  Moon at Ascending Node 
    18  00:56  Venus 0.5°N of Moon: Occn.
    18  04:32  Regulus 0.1°S of Moon
    18  23:22  Mercury 0.0°N of Moon: Occn.
    19  21:30  Venus 0.4°N of Regulus
    20  05:30  NEW MOON 
    22  07:51  Jupiter 3.7°S of Moon
    22  20:02  Autumnal Equinox 
    27  00:09  Saturn 3.5°S of Moon
    27  06:49  Moon at Apogee: 404342 km
    28  02:54  FIRST QUARTER MOON 

Oct 02  02:05  Moon at Descending Node 
    03  09     Venus at Perihelion 
    05  18:40  FULL MOON 
    08  00     Mars at Aphelion 
    08  21     Mercury at Superior Conjunction 
    09  05:51  Moon at Perigee: 366858 km
    09  18:05  Aldebaran 0.6°S of Moon
    12  12:25  LAST QUARTER MOON 
    13  20:29  Beehive 3.0°N of Moon
    14  22:10  Moon at Ascending Node 
    15  10:54  Regulus 0.2°S of Moon
    17  10:04  Mars 1.8°S of Moon
    18  00:21  Venus 2.0°S of Moon
    19  17     Uranus at Opposition 
    19  19:12  NEW MOON 
    21  11     Orionid Meteor Shower
    24  11:54  Saturn 3.3°S of Moon
    25  02:25  Moon at Apogee: 405151 km
    26  18     Jupiter in Conjunction with Sun 
    27  22:22  FIRST QUARTER MOON 
    29  06:41  Moon at Descending Node 

Nov 02  13:58  Venus 3.3°N of Spica
    04  05:23  FULL MOON 
    05  11     S Taurid Meteor Shower
    06  00:09  Moon at Perigee: 361438 km
    06  02:19  Aldebaran 0.8°S of Moon
    10  01:58  Beehive 2.7°N of Moon
    10  20:37  LAST QUARTER MOON 
    10  22:40  Moon at Ascending Node 
    11  16:07  Regulus 0.4°S of Moon
    12  11     N Taurid Meteor Shower
    12  17:50  Mercury 2.2°N of Antares
    15  00:40  Mars 3.2°S of Moon
    17  17     Leonid Meteor Shower
    18  11:42  NEW MOON 
    21  00:34  Saturn 3.0°S of Moon
    21  18:52  Moon at Apogee: 406132 km
    24  00     Mercury at Greatest Elong: 22.0°E
    25  08:22  Moon at Descending Node 
    26  17:03  FIRST QUARTER MOON 
    29  14:30  Mars 2.9°N of Spica

Dec 03  13:00  Aldebaran 0.8°S of Moon
    03  15:47  FULL MOON 
    04  08:42  Moon at Perigee: 357496 km
    07  00     Mercury 1.3° of Saturn
    07  09:30  Beehive 2.5°N of Moon
    08  00:39  Moon at Ascending Node 
    08  22:25  Regulus 0.7°S of Moon
    10  07:51  LAST QUARTER MOON 
    12  12     Mercury at Perihelion 
    13  02     Mercury at Inferior Conjunction 
    13  16:27  Mars 4.2°S of Moon
    14  06     Geminid Meteor Shower
    14  14:26  Jupiter 4.2°S of Moon
    18  06:31  NEW MOON 
    19  01:27  Moon at Apogee: 406605 km
    21  16:29  Winter Solstice 
    21  20     Saturn in Conjunction with Sun 
    22  10:04  Moon at Descending Node 
    22  15     Ursid Meteor Shower
    26  09:20  FIRST QUARTER MOON 
    31  00:25  Aldebaran 0.7°S of 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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