2017 Calendar of Astronomical Events




    


2017 Phases of the Moon

Eastern 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
Eastern Standard Time
New Moon First Quarter Full Moon Last Quarter
- Jan 5 14:47 Jan 12 06:34 Jan 19 17:14
Jan 27 19:07 Feb 3 23:19 Feb 10 19:33 n Feb 18 14:33
Feb 26 09:58 A Mar 5 06:32 Mar 12 09:54 Mar 20 10:58
Mar 27 21:57 Apr 3 13:39 Apr 11 01:08 Apr 19 04:57
Apr 26 07:16 May 2 21:47 May 10 16:43 May 18 19:33
May 25 14:44 Jun 1 07:42 Jun 9 08:10 Jun 17 06:33
Jun 23 21:31 Jun 30 19:51 Jul 8 23:07 Jul 16 14:26
Jul 23 04:46 Jul 30 10:23 Aug 7 13:11 p Aug 14 20:15
Aug 21 13:30 T Aug 29 03:13 Sep 6 02:03 Sep 13 01:25
Sep 20 00:30 Sep 27 21:54 Oct 5 13:40 Oct 12 07:25
Oct 19 14:12 Oct 27 17:22 Nov 4 00:23 Nov 10 15:37
Nov 18 06:42 Nov 26 12:03 Dec 3 10:47 Dec 10 02:51
Dec 18 01:31 Dec 26 04:20 --

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

Eastern 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     EST   Event
        (h:m)

Jan 02  04:20  Venus 1.9°S of Moon
    02  13:14  Moon at Descending Node 
    03  01:47  Mars 0.2°S of Moon: Occn.
    03  09     Quadrantid Meteor Shower
    04  10     Earth at Perihelion: 0.98331 AU
    05  14:47  FIRST QUARTER MOON 
    09  04     Mercury 6.7° of Saturn
    09  09:07  Aldebaran 0.4°S of Moon
    10  01:07  Moon at Perigee: 363242 km
    12  06:34  FULL MOON 
    12  08     Venus at Greatest Elong: 47.1°E
    13  08:59  Beehive 3.9°N of Moon
    14  23:07  Regulus 0.9°N of Moon
    15  05:44  Moon at Ascending Node 
    19  00:26  Jupiter 2.7°S of Moon
    19  05     Mercury at Greatest Elong: 24.1°W
    19  17:14  LAST QUARTER MOON 
    21  19:14  Moon at Apogee: 404913 km
    24  05:37  Saturn 3.6°S of Moon
    25  19:46  Mercury 3.7°S of Moon
    27  19:07  NEW MOON 
    29  17:21  Moon at Descending Node 
    31  08:11  Jupiter 3.5°N of Spica
    31  09:34  Venus 4.1°N of Moon
    31  20:09  Mars 2.3°N of Moon

Feb 03  23:19  FIRST QUARTER MOON 
    05  16:14  Aldebaran 0.2°S of Moon
    06  08:59  Moon at Perigee: 368817 km
    07  09     Mercury at Aphelion 
    09  18:46  Beehive 3.9°N of Moon
    10  19:33  FULL MOON 
    10  19:44  Pen. Lunar Eclipse; mag=0.988
    11  09:04  Regulus 0.8°N of Moon
    11  14:49  Moon at Ascending Node 
    15  09:55  Jupiter 2.7°S of Moon
    18  14:33  LAST QUARTER MOON 
    18  16     Jupiter at Aphelion 
    18  16:14  Moon at Apogee: 404376 km
    20  11     Venus at Perihelion 
    20  18:44  Saturn 3.6°S of Moon
    26  01:28  Moon at Descending Node 
    26  09:53  Annular Solar Eclipse; mag=0.992
    26  09:58  NEW MOON 

Mar 01  13:58  Mars 4.3°N of Moon
    01  21     Neptune in Conjunction with Sun 
    03  02:24  Moon at Perigee: 369065 km
    04  21:38  Aldebaran 0.2°S of Moon
    05  06:32  FIRST QUARTER MOON 
    06  19     Mercury at Superior Conjunction 
    09  02:12  Beehive 3.9°N of Moon
    10  17:20  Regulus 0.8°N of Moon
    10  23:17  Moon at Ascending Node 
    12  09:54  FULL MOON 
    14  15:04  Jupiter 2.5°S of Moon
    18  12:25  Moon at Apogee: 404651 km
    20  05:29  Vernal Equinox 
    20  05:49  Saturn 3.4°S of Moon
    20  10:58  LAST QUARTER MOON 
    23  09     Mercury at Perihelion 
    25  06     Venus at Inferior Conjunction 
    25  10:41  Moon at Descending Node 
    27  21:57  NEW MOON 
    30  07:39  Moon at Perigee: 363855 km
    30  08:03  Mars 5.5°N of Moon

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

May 02  13:23  Beehive 3.6°N of Moon
    02  21:47  FIRST QUARTER MOON 
    04  04:49  Regulus 0.5°N of Moon
    04  05:42  Moon at Ascending Node 
    04  20     Eta-Aquarid Meteor Shower
    05  08:51  Mars 6.1°N of Aldebaran
    07  16:24  Jupiter 2.1°S of Moon
    10  16:43  FULL MOON 
    12  14:51  Moon at Apogee: 406212 km
    13  18:07  Saturn 3.1°S of Moon
    17  18     Mercury at Greatest Elong: 25.8°W
    18  19:33  LAST QUARTER MOON 
    18  20:30  Moon at Descending Node 
    22  07:32  Venus 2.4°N of Moon
    23  20:20  Mercury 1.6°N of Moon
    25  14:44  NEW MOON 
    25  20:23  Moon at Perigee: 357210 km
    29  20:50  Beehive 3.4°N of Moon
    31  06:56  Moon at Ascending Node 
    31  11:08  Regulus 0.3°N of Moon

Jun 01  07:42  FIRST QUARTER MOON 
    03  06     Venus at Greatest Elong: 45.9°W
    03  18:57  Jupiter 2.3°S of Moon
    06  22:19  Mercury 5.3°S of Pleiades
    08  17:21  Moon at Apogee: 406402 km
    09  08:10  FULL MOON 
    09  20:25  Saturn 3.1°S of Moon
    12  19     Venus at Aphelion 
    14  21:40  Moon at Descending Node 
    15  04     Saturn at Opposition 
    17  06:33  LAST QUARTER MOON 
    19  08     Mercury at Perihelion 
    20  16:13  Venus 2.4°N of Moon
    20  23:25  Summer Solstice 
    21  09     Mercury at Superior Conjunction 
    22  09:23  Aldebaran 0.5°S of Moon
    23  05:49  Moon at Perigee: 357938 km
    23  21:31  NEW MOON 
    26  06:18  Beehive 3.2°N of Moon
    27  11:26  Moon at Ascending Node 
    27  19:26  Regulus 0.1°N of Moon
    30  19:51  FIRST QUARTER MOON 

Date     EST   Event
        (h:m)

Jul 01  02:28  Jupiter 2.7°S of Moon
    03  15     Earth at Aphelion: 1.01668 AU
    04  19:21  Venus 6.5°S of Pleiades
    05  23:27  Moon at Apogee: 405934 km
    06  22:34  Saturn 3.2°S of Moon
    08  23:07  FULL MOON 
    09  20:33  Mercury 0.1°N of Beehive
    12  00:17  Moon at Descending Node 
    13  13:03  Venus 3.1°N of Aldebaran
    16  14:26  LAST QUARTER MOON 
    19  18:37  Aldebaran 0.4°S of Moon
    20  06:13  Venus 2.7°N of Moon
    21  12:09  Moon at Perigee: 361238 km
    23  04:46  NEW MOON 
    24  19:46  Moon at Ascending Node 
    25  03:49  Mercury 0.9°S of Moon: Occn.
    25  05:14  Regulus 0.0°S of Moon
    25  12:03  Mercury 0.8°S of Regulus
    26  19     Mars in Conjunction with Sun 
    27  22     Delta-Aquarid Meteor Shower
    28  15:15  Jupiter 3.1°S of Moon
    29  23     Mercury at Greatest Elong: 27.2°E
    30  10:23  FIRST QUARTER MOON 

Aug 02  08     Mercury at Aphelion 
    02  12:55  Moon at Apogee: 405026 km
    03  02:31  Saturn 3.5°S of Moon
    07  13:11  FULL MOON 
    07  13:20  Partial Lunar Eclipse; mag=0.246
    08  05:56  Moon at Descending Node 
    12  14     Perseid Meteor Shower
    14  20:15  LAST QUARTER MOON 
    16  01:39  Aldebaran 0.4°S of Moon
    18  08:14  Moon at Perigee: 366129 km
    18  23:45  Venus 2.2°N of Moon
    20  02:15  Beehive 3.2°N of Moon
    20  13:08  Venus 7.2°S of Pollux
    21  05:34  Moon at Ascending Node 
    21  13:26  Total Solar Eclipse; mag=1.031
    21  13:30  NEW MOON 
    25  08:00  Jupiter 3.5°S of Moon
    26  16     Mercury at Inferior Conjunction 
    29  03:13  FIRST QUARTER MOON 
    30  06:25  Moon at Apogee: 404307 km
    30  09:23  Saturn 3.6°S of Moon

Sep 01  01:08  Venus 1.4°S of Beehive
    04  13:41  Moon at Descending Node 
    04  19     Mercury 3.2° of Mars
    04  23     Neptune at Opposition 
    06  02:03  FULL MOON 
    10  00:30  Mercury 0.7°S of Regulus
    10  16:44  Jupiter 2.9°N of Spica
    12  05     Mercury at Greatest Elong: 17.9°W
    12  07:09  Aldebaran 0.4°S of Moon
    13  01:25  LAST QUARTER MOON 
    13  11:04  Moon at Perigee: 369856 km
    15  07     Mercury at Perihelion 
    16  09:50  Beehive 3.1°N of Moon
    16  13     Mercury 0.1° of Mars
    17  13:28  Moon at Ascending Node 
    17  19:56  Venus 0.5°N of Moon: Occn.
    17  23:32  Regulus 0.1°S of Moon
    18  18:22  Mercury 0.0°N of Moon: Occn.
    19  16:30  Venus 0.4°N of Regulus
    20  00:30  NEW MOON 
    22  02:51  Jupiter 3.7°S of Moon
    22  15:02  Autumnal Equinox 
    26  19:09  Saturn 3.5°S of Moon
    27  01:49  Moon at Apogee: 404342 km
    27  21:54  FIRST QUARTER MOON 

Oct 01  21:05  Moon at Descending Node 
    03  04     Venus at Perihelion 
    05  13:40  FULL MOON 
    07  19     Mars at Aphelion 
    08  16     Mercury at Superior Conjunction 
    09  00:51  Moon at Perigee: 366858 km
    09  13:05  Aldebaran 0.6°S of Moon
    12  07:25  LAST QUARTER MOON 
    13  15:29  Beehive 3.0°N of Moon
    14  17:10  Moon at Ascending Node 
    15  05:54  Regulus 0.2°S of Moon
    17  05:04  Mars 1.8°S of Moon
    17  19:21  Venus 2.0°S of Moon
    19  12     Uranus at Opposition 
    19  14:12  NEW MOON 
    21  06     Orionid Meteor Shower
    24  06:54  Saturn 3.3°S of Moon
    24  21:25  Moon at Apogee: 405151 km
    26  13     Jupiter in Conjunction with Sun 
    27  17:22  FIRST QUARTER MOON 
    29  01:41  Moon at Descending Node 

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

Dec 03  08:00  Aldebaran 0.8°S of Moon
    03  10:47  FULL MOON 
    04  03:42  Moon at Perigee: 357496 km
    06  19     Mercury 1.3° of Saturn
    07  04:30  Beehive 2.5°N of Moon
    07  19:39  Moon at Ascending Node 
    08  17:25  Regulus 0.7°S of Moon
    10  02:51  LAST QUARTER MOON 
    12  07     Mercury at Perihelion 
    12  21     Mercury at Inferior Conjunction 
    13  11:27  Mars 4.2°S of Moon
    14  01     Geminid Meteor Shower
    14  09:26  Jupiter 4.2°S of Moon
    18  01:31  NEW MOON 
    18  20:27  Moon at Apogee: 406605 km
    21  11:29  Winter Solstice 
    21  15     Saturn in Conjunction with Sun 
    22  05:04  Moon at Descending Node 
    22  10     Ursid Meteor Shower
    26  04:20  FIRST QUARTER MOON 
    30  19:25  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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