2017 Calendar of Astronomical Events




    


2017 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.

2017 Phases of the Moon
Atlantic Standard Time
New Moon First Quarter Full Moon Last Quarter
- Jan 5 15:47 Jan 12 07:34 Jan 19 18:14
Jan 27 20:07 Feb 4 00:19 Feb 10 20:33 n Feb 18 15:33
Feb 26 10:58 A Mar 5 07:32 Mar 12 10:54 Mar 20 11:58
Mar 27 22:57 Apr 3 14:39 Apr 11 02:08 Apr 19 05:57
Apr 26 08:16 May 2 22:47 May 10 17:43 May 18 20:33
May 25 15:44 Jun 1 08:42 Jun 9 09:10 Jun 17 07:33
Jun 23 22:31 Jun 30 20:51 Jul 9 00:07 Jul 16 15:26
Jul 23 05:46 Jul 30 11:23 Aug 7 14:11 p Aug 14 21:15
Aug 21 14:30 T Aug 29 04:13 Sep 6 03:03 Sep 13 02:25
Sep 20 01:30 Sep 27 22:54 Oct 5 14:40 Oct 12 08:25
Oct 19 15:12 Oct 27 18:22 Nov 4 01:23 Nov 10 16:37
Nov 18 07:42 Nov 26 13:03 Dec 3 11:47 Dec 10 03:51
Dec 18 02:31 Dec 26 05:20 --

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

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.

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

Jan 02  05:20  Venus 1.9°S of Moon
    02  14:14  Moon at Descending Node 
    03  02:47  Mars 0.2°S of Moon: Occn.
    03  10     Quadrantid Meteor Shower
    04  11     Earth at Perihelion: 0.98331 AU
    05  15:47  FIRST QUARTER MOON 
    09  05     Mercury 6.7° of Saturn
    09  10:07  Aldebaran 0.4°S of Moon
    10  02:07  Moon at Perigee: 363242 km
    12  07:34  FULL MOON 
    12  09     Venus at Greatest Elong: 47.1°E
    13  09:59  Beehive 3.9°N of Moon
    15  00:07  Regulus 0.9°N of Moon
    15  06:44  Moon at Ascending Node 
    19  01:26  Jupiter 2.7°S of Moon
    19  06     Mercury at Greatest Elong: 24.1°W
    19  18:14  LAST QUARTER MOON 
    21  20:14  Moon at Apogee: 404913 km
    24  06:37  Saturn 3.6°S of Moon
    25  20:46  Mercury 3.7°S of Moon
    27  20:07  NEW MOON 
    29  18:21  Moon at Descending Node 
    31  09:11  Jupiter 3.5°N of Spica
    31  10:34  Venus 4.1°N of Moon
    31  21:09  Mars 2.3°N of Moon

Feb 04  00:19  FIRST QUARTER MOON 
    05  17:14  Aldebaran 0.2°S of Moon
    06  09:59  Moon at Perigee: 368817 km
    07  10     Mercury at Aphelion 
    09  19:46  Beehive 3.9°N of Moon
    10  20:33  FULL MOON 
    10  20:44  Pen. Lunar Eclipse; mag=0.988
    11  10:04  Regulus 0.8°N of Moon
    11  15:49  Moon at Ascending Node 
    15  10:55  Jupiter 2.7°S of Moon
    18  15:33  LAST QUARTER MOON 
    18  17     Jupiter at Aphelion 
    18  17:14  Moon at Apogee: 404376 km
    20  12     Venus at Perihelion 
    20  19:44  Saturn 3.6°S of Moon
    26  02:28  Moon at Descending Node 
    26  10:53  Annular Solar Eclipse; mag=0.992
    26  10:58  NEW MOON 

Mar 01  14:58  Mars 4.3°N of Moon
    01  22     Neptune in Conjunction with Sun 
    03  03:24  Moon at Perigee: 369065 km
    04  22:38  Aldebaran 0.2°S of Moon
    05  07:32  FIRST QUARTER MOON 
    06  20     Mercury at Superior Conjunction 
    09  03:12  Beehive 3.9°N of Moon
    10  18:20  Regulus 0.8°N of Moon
    11  00:17  Moon at Ascending Node 
    12  10:54  FULL MOON 
    14  16:04  Jupiter 2.5°S of Moon
    18  13:25  Moon at Apogee: 404651 km
    20  06:29  Vernal Equinox 
    20  06:49  Saturn 3.4°S of Moon
    20  11:58  LAST QUARTER MOON 
    23  10     Mercury at Perihelion 
    25  07     Venus at Inferior Conjunction 
    25  11:41  Moon at Descending Node 
    27  22:57  NEW MOON 
    30  08:39  Moon at Perigee: 363855 km
    30  09:03  Mars 5.5°N of Moon

Apr 01  04:50  Aldebaran 0.3°S of Moon
    01  06     Mercury at Greatest Elong: 19.0°E
    03  14:39  FIRST QUARTER MOON 
    05  08:45  Beehive 3.8°N of Moon
    07  00:30  Regulus 0.7°N of Moon
    07  05:14  Moon at Ascending Node 
    07  17     Jupiter at Opposition 
    10  17:20  Jupiter 2.2°S of Moon
    11  02:08  FULL MOON 
    14  02     Uranus in Conjunction with Sun 
    15  06:05  Moon at Apogee: 405478 km
    16  14:39  Saturn 3.2°S of Moon
    19  05:57  LAST QUARTER MOON 
    20  02     Mercury at Inferior Conjunction 
    21  04:16  Mars 3.4°S of Pleiades
    21  18:30  Moon at Descending Node 
    22  08     Lyrid Meteor Shower
    23  13:59  Venus 5.2°N of Moon
    26  08:16  NEW MOON 
    27  12:18  Moon at Perigee: 359325 km
    28  13:19  Aldebaran 0.5°S of Moon

May 02  14:23  Beehive 3.6°N of Moon
    02  22:47  FIRST QUARTER MOON 
    04  05:49  Regulus 0.5°N of Moon
    04  06:42  Moon at Ascending Node 
    04  21     Eta-Aquarid Meteor Shower
    05  09:51  Mars 6.1°N of Aldebaran
    07  17:24  Jupiter 2.1°S of Moon
    10  17:43  FULL MOON 
    12  15:51  Moon at Apogee: 406212 km
    13  19:07  Saturn 3.1°S of Moon
    17  19     Mercury at Greatest Elong: 25.8°W
    18  20:33  LAST QUARTER MOON 
    18  21:30  Moon at Descending Node 
    22  08:32  Venus 2.4°N of Moon
    23  21:20  Mercury 1.6°N of Moon
    25  15:44  NEW MOON 
    25  21:23  Moon at Perigee: 357210 km
    29  21:50  Beehive 3.4°N of Moon
    31  07:56  Moon at Ascending Node 
    31  12:08  Regulus 0.3°N of Moon

Jun 01  08:42  FIRST QUARTER MOON 
    03  07     Venus at Greatest Elong: 45.9°W
    03  19:57  Jupiter 2.3°S of Moon
    06  23:19  Mercury 5.3°S of Pleiades
    08  18:21  Moon at Apogee: 406402 km
    09  09:10  FULL MOON 
    09  21:25  Saturn 3.1°S of Moon
    12  20     Venus at Aphelion 
    14  22:40  Moon at Descending Node 
    15  05     Saturn at Opposition 
    17  07:33  LAST QUARTER MOON 
    19  09     Mercury at Perihelion 
    20  17:13  Venus 2.4°N of Moon
    21  00:25  Summer Solstice 
    21  10     Mercury at Superior Conjunction 
    22  10:23  Aldebaran 0.5°S of Moon
    23  06:49  Moon at Perigee: 357938 km
    23  22:31  NEW MOON 
    26  07:18  Beehive 3.2°N of Moon
    27  12:26  Moon at Ascending Node 
    27  20:26  Regulus 0.1°N of Moon
    30  20:51  FIRST QUARTER MOON 

Date     AST   Event
        (h:m)

Jul 01  03:28  Jupiter 2.7°S of Moon
    03  16     Earth at Aphelion: 1.01668 AU
    04  20:21  Venus 6.5°S of Pleiades
    06  00:27  Moon at Apogee: 405934 km
    06  23:34  Saturn 3.2°S of Moon
    09  00:07  FULL MOON 
    09  21:33  Mercury 0.1°N of Beehive
    12  01:17  Moon at Descending Node 
    13  14:03  Venus 3.1°N of Aldebaran
    16  15:26  LAST QUARTER MOON 
    19  19:37  Aldebaran 0.4°S of Moon
    20  07:13  Venus 2.7°N of Moon
    21  13:09  Moon at Perigee: 361238 km
    23  05:46  NEW MOON 
    24  20:46  Moon at Ascending Node 
    25  04:49  Mercury 0.9°S of Moon: Occn.
    25  06:14  Regulus 0.0°S of Moon
    25  13:03  Mercury 0.8°S of Regulus
    26  20     Mars in Conjunction with Sun 
    27  23     Delta-Aquarid Meteor Shower
    28  16:15  Jupiter 3.1°S of Moon
    30  00     Mercury at Greatest Elong: 27.2°E
    30  11:23  FIRST QUARTER MOON 

Aug 02  09     Mercury at Aphelion 
    02  13:55  Moon at Apogee: 405026 km
    03  03:31  Saturn 3.5°S of Moon
    07  14:11  FULL MOON 
    07  14:20  Partial Lunar Eclipse; mag=0.246
    08  06:56  Moon at Descending Node 
    12  15     Perseid Meteor Shower
    14  21:15  LAST QUARTER MOON 
    16  02:39  Aldebaran 0.4°S of Moon
    18  09:14  Moon at Perigee: 366129 km
    19  00:45  Venus 2.2°N of Moon
    20  03:15  Beehive 3.2°N of Moon
    20  14:08  Venus 7.2°S of Pollux
    21  06:34  Moon at Ascending Node 
    21  14:26  Total Solar Eclipse; mag=1.031
    21  14:30  NEW MOON 
    25  09:00  Jupiter 3.5°S of Moon
    26  17     Mercury at Inferior Conjunction 
    29  04:13  FIRST QUARTER MOON 
    30  07:25  Moon at Apogee: 404307 km
    30  10:23  Saturn 3.6°S of Moon

Sep 01  02:08  Venus 1.4°S of Beehive
    04  14:41  Moon at Descending Node 
    04  20     Mercury 3.2° of Mars
    05  00     Neptune at Opposition 
    06  03:03  FULL MOON 
    10  01:30  Mercury 0.7°S of Regulus
    10  17:44  Jupiter 2.9°N of Spica
    12  06     Mercury at Greatest Elong: 17.9°W
    12  08:09  Aldebaran 0.4°S of Moon
    13  02:25  LAST QUARTER MOON 
    13  12:04  Moon at Perigee: 369856 km
    15  08     Mercury at Perihelion 
    16  10:50  Beehive 3.1°N of Moon
    16  14     Mercury 0.1° of Mars
    17  14:28  Moon at Ascending Node 
    17  20:56  Venus 0.5°N of Moon: Occn.
    18  00:32  Regulus 0.1°S of Moon
    18  19:22  Mercury 0.0°N of Moon: Occn.
    19  17:30  Venus 0.4°N of Regulus
    20  01:30  NEW MOON 
    22  03:51  Jupiter 3.7°S of Moon
    22  16:02  Autumnal Equinox 
    26  20:09  Saturn 3.5°S of Moon
    27  02:49  Moon at Apogee: 404342 km
    27  22:54  FIRST QUARTER MOON 

Oct 01  22:05  Moon at Descending Node 
    03  05     Venus at Perihelion 
    05  14:40  FULL MOON 
    07  20     Mars at Aphelion 
    08  17     Mercury at Superior Conjunction 
    09  01:51  Moon at Perigee: 366858 km
    09  14:05  Aldebaran 0.6°S of Moon
    12  08:25  LAST QUARTER MOON 
    13  16:29  Beehive 3.0°N of Moon
    14  18:10  Moon at Ascending Node 
    15  06:54  Regulus 0.2°S of Moon
    17  06:04  Mars 1.8°S of Moon
    17  20:21  Venus 2.0°S of Moon
    19  13     Uranus at Opposition 
    19  15:12  NEW MOON 
    21  07     Orionid Meteor Shower
    24  07:54  Saturn 3.3°S of Moon
    24  22:25  Moon at Apogee: 405151 km
    26  14     Jupiter in Conjunction with Sun 
    27  18:22  FIRST QUARTER MOON 
    29  02:41  Moon at Descending Node 

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

Dec 03  09:00  Aldebaran 0.8°S of Moon
    03  11:47  FULL MOON 
    04  04:42  Moon at Perigee: 357496 km
    06  20     Mercury 1.3° of Saturn
    07  05:30  Beehive 2.5°N of Moon
    07  20:39  Moon at Ascending Node 
    08  18:25  Regulus 0.7°S of Moon
    10  03:51  LAST QUARTER MOON 
    12  08     Mercury at Perihelion 
    12  22     Mercury at Inferior Conjunction 
    13  12:27  Mars 4.2°S of Moon
    14  02     Geminid Meteor Shower
    14  10:26  Jupiter 4.2°S of Moon
    18  02:31  NEW MOON 
    18  21:27  Moon at Apogee: 406605 km
    21  12:29  Winter Solstice 
    21  16     Saturn in Conjunction with Sun 
    22  06:04  Moon at Descending Node 
    22  11     Ursid Meteor Shower
    26  05:20  FIRST QUARTER MOON 
    30  20:25  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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