2017 Calendar of Astronomical Events




    


2017 Phases of the Moon

Pacific 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
Pacific Standard Time
New Moon First Quarter Full Moon Last Quarter
- Jan 5 11:47 Jan 12 03:34 Jan 19 14:14
Jan 27 16:07 Feb 3 20:19 Feb 10 16:33 n Feb 18 11:33
Feb 26 06:58 A Mar 5 03:32 Mar 12 06:54 Mar 20 07:58
Mar 27 18:57 Apr 3 10:39 Apr 10 22:08 Apr 19 01:57
Apr 26 04:16 May 2 18:47 May 10 13:43 May 18 16:33
May 25 11:44 Jun 1 04:42 Jun 9 05:10 Jun 17 03:33
Jun 23 18:31 Jun 30 16:51 Jul 8 20:07 Jul 16 11:26
Jul 23 01:46 Jul 30 07:23 Aug 7 10:11 p Aug 14 17:15
Aug 21 10:30 T Aug 29 00:13 Sep 5 23:03 Sep 12 22:25
Sep 19 21:30 Sep 27 18:54 Oct 5 10:40 Oct 12 04:25
Oct 19 11:12 Oct 27 14:22 Nov 3 21:23 Nov 10 12:37
Nov 18 03:42 Nov 26 09:03 Dec 3 07:47 Dec 9 23:51
Dec 17 22:31 Dec 26 01:20 --

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

Pacific 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     PST   Event
        (h:m)

Jan 02  01:20  Venus 1.9°S of Moon
    02  10:14  Moon at Descending Node 
    02  22:47  Mars 0.2°S of Moon: Occn.
    03  06     Quadrantid Meteor Shower
    04  07     Earth at Perihelion: 0.98331 AU
    05  11:47  FIRST QUARTER MOON 
    09  01     Mercury 6.7° of Saturn
    09  06:07  Aldebaran 0.4°S of Moon
    09  22:07  Moon at Perigee: 363242 km
    12  03:34  FULL MOON 
    12  05     Venus at Greatest Elong: 47.1°E
    13  05:59  Beehive 3.9°N of Moon
    14  20:07  Regulus 0.9°N of Moon
    15  02:44  Moon at Ascending Node 
    18  21:26  Jupiter 2.7°S of Moon
    19  02     Mercury at Greatest Elong: 24.1°W
    19  14:14  LAST QUARTER MOON 
    21  16:14  Moon at Apogee: 404913 km
    24  02:37  Saturn 3.6°S of Moon
    25  16:46  Mercury 3.7°S of Moon
    27  16:07  NEW MOON 
    29  14:21  Moon at Descending Node 
    31  05:11  Jupiter 3.5°N of Spica
    31  06:34  Venus 4.1°N of Moon
    31  17:09  Mars 2.3°N of Moon

Feb 03  20:19  FIRST QUARTER MOON 
    05  13:14  Aldebaran 0.2°S of Moon
    06  05:59  Moon at Perigee: 368817 km
    07  06     Mercury at Aphelion 
    09  15:46  Beehive 3.9°N of Moon
    10  16:33  FULL MOON 
    10  16:44  Pen. Lunar Eclipse; mag=0.988
    11  06:04  Regulus 0.8°N of Moon
    11  11:49  Moon at Ascending Node 
    15  06:55  Jupiter 2.7°S of Moon
    18  11:33  LAST QUARTER MOON 
    18  13     Jupiter at Aphelion 
    18  13:14  Moon at Apogee: 404376 km
    20  08     Venus at Perihelion 
    20  15:44  Saturn 3.6°S of Moon
    25  22:28  Moon at Descending Node 
    26  06:53  Annular Solar Eclipse; mag=0.992
    26  06:58  NEW MOON 

Mar 01  10:58  Mars 4.3°N of Moon
    01  18     Neptune in Conjunction with Sun 
    02  23:24  Moon at Perigee: 369065 km
    04  18:38  Aldebaran 0.2°S of Moon
    05  03:32  FIRST QUARTER MOON 
    06  16     Mercury at Superior Conjunction 
    08  23:12  Beehive 3.9°N of Moon
    10  14:20  Regulus 0.8°N of Moon
    10  20:17  Moon at Ascending Node 
    12  06:54  FULL MOON 
    14  12:04  Jupiter 2.5°S of Moon
    18  09:25  Moon at Apogee: 404651 km
    20  02:29  Vernal Equinox 
    20  02:49  Saturn 3.4°S of Moon
    20  07:58  LAST QUARTER MOON 
    23  06     Mercury at Perihelion 
    25  03     Venus at Inferior Conjunction 
    25  07:41  Moon at Descending Node 
    27  18:57  NEW MOON 
    30  04:39  Moon at Perigee: 363855 km
    30  05:03  Mars 5.5°N of Moon

Apr 01  00:50  Aldebaran 0.3°S of Moon
    01  02     Mercury at Greatest Elong: 19.0°E
    03  10:39  FIRST QUARTER MOON 
    05  04:45  Beehive 3.8°N of Moon
    06  20:30  Regulus 0.7°N of Moon
    07  01:14  Moon at Ascending Node 
    07  13     Jupiter at Opposition 
    10  13:20  Jupiter 2.2°S of Moon
    10  22:08  FULL MOON 
    13  22     Uranus in Conjunction with Sun 
    15  02:05  Moon at Apogee: 405478 km
    16  10:39  Saturn 3.2°S of Moon
    19  01:57  LAST QUARTER MOON 
    19  22     Mercury at Inferior Conjunction 
    21  00:16  Mars 3.4°S of Pleiades
    21  14:30  Moon at Descending Node 
    22  04     Lyrid Meteor Shower
    23  09:59  Venus 5.2°N of Moon
    26  04:16  NEW MOON 
    27  08:18  Moon at Perigee: 359325 km
    28  09:19  Aldebaran 0.5°S of Moon

May 02  10:23  Beehive 3.6°N of Moon
    02  18:47  FIRST QUARTER MOON 
    04  01:49  Regulus 0.5°N of Moon
    04  02:42  Moon at Ascending Node 
    04  17     Eta-Aquarid Meteor Shower
    05  05:51  Mars 6.1°N of Aldebaran
    07  13:24  Jupiter 2.1°S of Moon
    10  13:43  FULL MOON 
    12  11:51  Moon at Apogee: 406212 km
    13  15:07  Saturn 3.1°S of Moon
    17  15     Mercury at Greatest Elong: 25.8°W
    18  16:33  LAST QUARTER MOON 
    18  17:30  Moon at Descending Node 
    22  04:32  Venus 2.4°N of Moon
    23  17:20  Mercury 1.6°N of Moon
    25  11:44  NEW MOON 
    25  17:23  Moon at Perigee: 357210 km
    29  17:50  Beehive 3.4°N of Moon
    31  03:56  Moon at Ascending Node 
    31  08:08  Regulus 0.3°N of Moon

Jun 01  04:42  FIRST QUARTER MOON 
    03  03     Venus at Greatest Elong: 45.9°W
    03  15:57  Jupiter 2.3°S of Moon
    06  19:19  Mercury 5.3°S of Pleiades
    08  14:21  Moon at Apogee: 406402 km
    09  05:10  FULL MOON 
    09  17:25  Saturn 3.1°S of Moon
    12  16     Venus at Aphelion 
    14  18:40  Moon at Descending Node 
    15  01     Saturn at Opposition 
    17  03:33  LAST QUARTER MOON 
    19  05     Mercury at Perihelion 
    20  13:13  Venus 2.4°N of Moon
    20  20:25  Summer Solstice 
    21  06     Mercury at Superior Conjunction 
    22  06:23  Aldebaran 0.5°S of Moon
    23  02:49  Moon at Perigee: 357938 km
    23  18:31  NEW MOON 
    26  03:18  Beehive 3.2°N of Moon
    27  08:26  Moon at Ascending Node 
    27  16:26  Regulus 0.1°N of Moon
    30  16:51  FIRST QUARTER MOON 
    30  23:28  Jupiter 2.7°S of Moon

Date     PST   Event
        (h:m)

Jul 03  12     Earth at Aphelion: 1.01668 AU
    04  16:21  Venus 6.5°S of Pleiades
    05  20:27  Moon at Apogee: 405934 km
    06  19:34  Saturn 3.2°S of Moon
    08  20:07  FULL MOON 
    09  17:33  Mercury 0.1°N of Beehive
    11  21:17  Moon at Descending Node 
    13  10:03  Venus 3.1°N of Aldebaran
    16  11:26  LAST QUARTER MOON 
    19  15:37  Aldebaran 0.4°S of Moon
    20  03:13  Venus 2.7°N of Moon
    21  09:09  Moon at Perigee: 361238 km
    23  01:46  NEW MOON 
    24  16:46  Moon at Ascending Node 
    25  00:49  Mercury 0.9°S of Moon: Occn.
    25  02:14  Regulus 0.0°S of Moon
    25  09:03  Mercury 0.8°S of Regulus
    26  16     Mars in Conjunction with Sun 
    27  19     Delta-Aquarid Meteor Shower
    28  12:15  Jupiter 3.1°S of Moon
    29  20     Mercury at Greatest Elong: 27.2°E
    30  07:23  FIRST QUARTER MOON 

Aug 02  05     Mercury at Aphelion 
    02  09:55  Moon at Apogee: 405026 km
    02  23:31  Saturn 3.5°S of Moon
    07  10:11  FULL MOON 
    07  10:20  Partial Lunar Eclipse; mag=0.246
    08  02:56  Moon at Descending Node 
    12  11     Perseid Meteor Shower
    14  17:15  LAST QUARTER MOON 
    15  22:39  Aldebaran 0.4°S of Moon
    18  05:14  Moon at Perigee: 366129 km
    18  20:45  Venus 2.2°N of Moon
    19  23:15  Beehive 3.2°N of Moon
    20  10:08  Venus 7.2°S of Pollux
    21  02:34  Moon at Ascending Node 
    21  10:26  Total Solar Eclipse; mag=1.031
    21  10:30  NEW MOON 
    25  05:00  Jupiter 3.5°S of Moon
    26  13     Mercury at Inferior Conjunction 
    29  00:13  FIRST QUARTER MOON 
    30  03:25  Moon at Apogee: 404307 km
    30  06:23  Saturn 3.6°S of Moon
    31  22:08  Venus 1.4°S of Beehive

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

Oct 01  18:05  Moon at Descending Node 
    03  01     Venus at Perihelion 
    05  10:40  FULL MOON 
    07  16     Mars at Aphelion 
    08  13     Mercury at Superior Conjunction 
    08  21:51  Moon at Perigee: 366858 km
    09  10:05  Aldebaran 0.6°S of Moon
    12  04:25  LAST QUARTER MOON 
    13  12:29  Beehive 3.0°N of Moon
    14  14:10  Moon at Ascending Node 
    15  02:54  Regulus 0.2°S of Moon
    17  02:04  Mars 1.8°S of Moon
    17  16:21  Venus 2.0°S of Moon
    19  09     Uranus at Opposition 
    19  11:12  NEW MOON 
    21  03     Orionid Meteor Shower
    24  03:54  Saturn 3.3°S of Moon
    24  18:25  Moon at Apogee: 405151 km
    26  10     Jupiter in Conjunction with Sun 
    27  14:22  FIRST QUARTER MOON 
    28  22:41  Moon at Descending Node 

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

Dec 03  05:00  Aldebaran 0.8°S of Moon
    03  07:47  FULL MOON 
    04  00:42  Moon at Perigee: 357496 km
    06  16     Mercury 1.3° of Saturn
    07  01:30  Beehive 2.5°N of Moon
    07  16:39  Moon at Ascending Node 
    08  14:25  Regulus 0.7°S of Moon
    09  23:51  LAST QUARTER MOON 
    12  04     Mercury at Perihelion 
    12  18     Mercury at Inferior Conjunction 
    13  08:27  Mars 4.2°S of Moon
    13  22     Geminid Meteor Shower
    14  06:26  Jupiter 4.2°S of Moon
    17  22:31  NEW MOON 
    18  17:27  Moon at Apogee: 406605 km
    21  08:29  Winter Solstice 
    21  12     Saturn in Conjunction with Sun 
    22  02:04  Moon at Descending Node 
    22  07     Ursid Meteor Shower
    26  01:20  FIRST QUARTER MOON 
    30  16:25  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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