2017 Calendar of Astronomical Events



2017 Phases of the Moon

Alaska 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
Alaska Standard Time
New Moon First Quarter Full Moon Last Quarter
- Jan 5 10:47 Jan 12 02:34 Jan 19 13:14
Jan 27 15:07 Feb 3 19:19 Feb 10 15:33 n Feb 18 10:33
Feb 26 05:58 A Mar 5 02:32 Mar 12 05:54 Mar 20 06:58
Mar 27 17:57 Apr 3 09:39 Apr 10 21:08 Apr 19 00:57
Apr 26 03:16 May 2 17:47 May 10 12:43 May 18 15:33
May 25 10:44 Jun 1 03:42 Jun 9 04:10 Jun 17 02:33
Jun 23 17:31 Jun 30 15:51 Jul 8 19:07 Jul 16 10:26
Jul 23 00:46 Jul 30 06:23 Aug 7 09:11 p Aug 14 16:15
Aug 21 09:30 T Aug 28 23:13 Sep 5 22:03 Sep 12 21:25
Sep 19 20:30 Sep 27 17:54 Oct 5 09:40 Oct 12 03:25
Oct 19 10:12 Oct 27 13:22 Nov 3 20:23 Nov 10 11:37
Nov 18 02:42 Nov 26 08:03 Dec 3 06:47 Dec 9 22:51
Dec 17 21:31 Dec 26 00:20 --

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

Alaska 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     AKST   Even
        (h:m)

Jan 02  00:20  Venus 1.9°S of Moon
    02  09:14  Moon at Descending Node 
    02  21:47  Mars 0.2°S of Moon: Occn.
    03  05     Quadrantid Meteor Shower
    04  06     Earth at Perihelion: 0.98331 AU
    05  10:47  FIRST QUARTER MOON 
    09  00     Mercury 6.7° of Saturn
    09  05:07  Aldebaran 0.4°S of Moon
    09  21:07  Moon at Perigee: 363242 km
    12  02:34  FULL MOON 
    12  04     Venus at Greatest Elong: 47.1°E
    13  04:59  Beehive 3.9°N of Moon
    14  19:07  Regulus 0.9°N of Moon
    15  01:44  Moon at Ascending Node 
    18  20:26  Jupiter 2.7°S of Moon
    19  01     Mercury at Greatest Elong: 24.1°W
    19  13:14  LAST QUARTER MOON 
    21  15:14  Moon at Apogee: 404913 km
    24  01:37  Saturn 3.6°S of Moon
    25  15:46  Mercury 3.7°S of Moon
    27  15:07  NEW MOON 
    29  13:21  Moon at Descending Node 
    31  04:11  Jupiter 3.5°N of Spica
    31  05:34  Venus 4.1°N of Moon
    31  16:09  Mars 2.3°N of Moon

Feb 03  19:19  FIRST QUARTER MOON 
    05  12:14  Aldebaran 0.2°S of Moon
    06  04:59  Moon at Perigee: 368817 km
    07  05     Mercury at Aphelion 
    09  14:46  Beehive 3.9°N of Moon
    10  15:33  FULL MOON 
    10  15:44  Pen. Lunar Eclipse; mag=0.988
    11  05:04  Regulus 0.8°N of Moon
    11  10:49  Moon at Ascending Node 
    15  05:55  Jupiter 2.7°S of Moon
    18  10:33  LAST QUARTER MOON 
    18  12     Jupiter at Aphelion 
    18  12:14  Moon at Apogee: 404376 km
    20  07     Venus at Perihelion 
    20  14:44  Saturn 3.6°S of Moon
    25  21:28  Moon at Descending Node 
    26  05:53  Annular Solar Eclipse; mag=0.992
    26  05:58  NEW MOON 

Mar 01  09:58  Mars 4.3°N of Moon
    01  17     Neptune in Conjunction with Sun 
    02  22:24  Moon at Perigee: 369065 km
    04  17:38  Aldebaran 0.2°S of Moon
    05  02:32  FIRST QUARTER MOON 
    06  15     Mercury at Superior Conjunction 
    08  22:12  Beehive 3.9°N of Moon
    10  13:20  Regulus 0.8°N of Moon
    10  19:17  Moon at Ascending Node 
    12  05:54  FULL MOON 
    14  11:04  Jupiter 2.5°S of Moon
    18  08:25  Moon at Apogee: 404651 km
    20  01:29  Vernal Equinox 
    20  01:49  Saturn 3.4°S of Moon
    20  06:58  LAST QUARTER MOON 
    23  05     Mercury at Perihelion 
    25  02     Venus at Inferior Conjunction 
    25  06:41  Moon at Descending Node 
    27  17:57  NEW MOON 
    30  03:39  Moon at Perigee: 363855 km
    30  04:03  Mars 5.5°N of Moon
    31  23:50  Aldebaran 0.3°S of Moon

Apr 01  01     Mercury at Greatest Elong: 19.0°E
    03  09:39  FIRST QUARTER MOON 
    05  03:45  Beehive 3.8°N of Moon
    06  19:30  Regulus 0.7°N of Moon
    07  00:14  Moon at Ascending Node 
    07  12     Jupiter at Opposition 
    10  12:20  Jupiter 2.2°S of Moon
    10  21:08  FULL MOON 
    13  21     Uranus in Conjunction with Sun 
    15  01:05  Moon at Apogee: 405478 km
    16  09:39  Saturn 3.2°S of Moon
    19  00:57  LAST QUARTER MOON 
    19  21     Mercury at Inferior Conjunction 
    20  23:16  Mars 3.4°S of Pleiades
    21  13:30  Moon at Descending Node 
    22  03     Lyrid Meteor Shower
    23  08:59  Venus 5.2°N of Moon
    26  03:16  NEW MOON 
    27  07:18  Moon at Perigee: 359325 km
    28  08:19  Aldebaran 0.5°S of Moon

May 02  09:23  Beehive 3.6°N of Moon
    02  17:47  FIRST QUARTER MOON 
    04  00:49  Regulus 0.5°N of Moon
    04  01:42  Moon at Ascending Node 
    04  16     Eta-Aquarid Meteor Shower
    05  04:51  Mars 6.1°N of Aldebaran
    07  12:24  Jupiter 2.1°S of Moon
    10  12:43  FULL MOON 
    12  10:51  Moon at Apogee: 406212 km
    13  14:07  Saturn 3.1°S of Moon
    17  14     Mercury at Greatest Elong: 25.8°W
    18  15:33  LAST QUARTER MOON 
    18  16:30  Moon at Descending Node 
    22  03:32  Venus 2.4°N of Moon
    23  16:20  Mercury 1.6°N of Moon
    25  10:44  NEW MOON 
    25  16:23  Moon at Perigee: 357210 km
    29  16:50  Beehive 3.4°N of Moon
    31  02:56  Moon at Ascending Node 
    31  07:08  Regulus 0.3°N of Moon

Jun 01  03:42  FIRST QUARTER MOON 
    03  02     Venus at Greatest Elong: 45.9°W
    03  14:57  Jupiter 2.3°S of Moon
    06  18:19  Mercury 5.3°S of Pleiades
    08  13:21  Moon at Apogee: 406402 km
    09  04:10  FULL MOON 
    09  16:25  Saturn 3.1°S of Moon
    12  15     Venus at Aphelion 
    14  17:40  Moon at Descending Node 
    15  00     Saturn at Opposition 
    17  02:33  LAST QUARTER MOON 
    19  04     Mercury at Perihelion 
    20  12:13  Venus 2.4°N of Moon
    20  19:25  Summer Solstice 
    21  05     Mercury at Superior Conjunction 
    22  05:23  Aldebaran 0.5°S of Moon
    23  01:49  Moon at Perigee: 357938 km
    23  17:31  NEW MOON 
    26  02:18  Beehive 3.2°N of Moon
    27  07:26  Moon at Ascending Node 
    27  15:26  Regulus 0.1°N of Moon
    30  15:51  FIRST QUARTER MOON 
    30  22:28  Jupiter 2.7°S of Moon

Date     AKST   Even
        (h:m)

Jul 03  11     Earth at Aphelion: 1.01668 AU
    04  15:21  Venus 6.5°S of Pleiades
    05  19:27  Moon at Apogee: 405934 km
    06  18:34  Saturn 3.2°S of Moon
    08  19:07  FULL MOON 
    09  16:33  Mercury 0.1°N of Beehive
    11  20:17  Moon at Descending Node 
    13  09:03  Venus 3.1°N of Aldebaran
    16  10:26  LAST QUARTER MOON 
    19  14:37  Aldebaran 0.4°S of Moon
    20  02:13  Venus 2.7°N of Moon
    21  08:09  Moon at Perigee: 361238 km
    23  00:46  NEW MOON 
    24  15:46  Moon at Ascending Node 
    24  23:49  Mercury 0.9°S of Moon: Occn.
    25  01:14  Regulus 0.0°S of Moon
    25  08:03  Mercury 0.8°S of Regulus
    26  15     Mars in Conjunction with Sun 
    27  18     Delta-Aquarid Meteor Shower
    28  11:15  Jupiter 3.1°S of Moon
    29  19     Mercury at Greatest Elong: 27.2°E
    30  06:23  FIRST QUARTER MOON 

Aug 02  04     Mercury at Aphelion 
    02  08:55  Moon at Apogee: 405026 km
    02  22:31  Saturn 3.5°S of Moon
    07  09:11  FULL MOON 
    07  09:20  Partial Lunar Eclipse; mag=0.246
    08  01:56  Moon at Descending Node 
    12  10     Perseid Meteor Shower
    14  16:15  LAST QUARTER MOON 
    15  21:39  Aldebaran 0.4°S of Moon
    18  04:14  Moon at Perigee: 366129 km
    18  19:45  Venus 2.2°N of Moon
    19  22:15  Beehive 3.2°N of Moon
    20  09:08  Venus 7.2°S of Pollux
    21  01:34  Moon at Ascending Node 
    21  09:26  Total Solar Eclipse; mag=1.031
    21  09:30  NEW MOON 
    25  04:00  Jupiter 3.5°S of Moon
    26  12     Mercury at Inferior Conjunction 
    28  23:13  FIRST QUARTER MOON 
    30  02:25  Moon at Apogee: 404307 km
    30  05:23  Saturn 3.6°S of Moon
    31  21:08  Venus 1.4°S of Beehive

Sep 04  09:41  Moon at Descending Node 
    04  15     Mercury 3.2° of Mars
    04  19     Neptune at Opposition 
    05  22:03  FULL MOON 
    09  20:30  Mercury 0.7°S of Regulus
    10  12:44  Jupiter 2.9°N of Spica
    12  01     Mercury at Greatest Elong: 17.9°W
    12  03:09  Aldebaran 0.4°S of Moon
    12  21:25  LAST QUARTER MOON 
    13  07:04  Moon at Perigee: 369856 km
    15  03     Mercury at Perihelion 
    16  05:50  Beehive 3.1°N of Moon
    16  09     Mercury 0.1° of Mars
    17  09:28  Moon at Ascending Node 
    17  15:56  Venus 0.5°N of Moon: Occn.
    17  19:32  Regulus 0.1°S of Moon
    18  14:22  Mercury 0.0°N of Moon: Occn.
    19  12:30  Venus 0.4°N of Regulus
    19  20:30  NEW MOON 
    21  22:51  Jupiter 3.7°S of Moon
    22  11:02  Autumnal Equinox 
    26  15:09  Saturn 3.5°S of Moon
    26  21:49  Moon at Apogee: 404342 km
    27  17:54  FIRST QUARTER MOON 

Oct 01  17:05  Moon at Descending Node 
    03  00     Venus at Perihelion 
    05  09:40  FULL MOON 
    07  15     Mars at Aphelion 
    08  12     Mercury at Superior Conjunction 
    08  20:51  Moon at Perigee: 366858 km
    09  09:05  Aldebaran 0.6°S of Moon
    12  03:25  LAST QUARTER MOON 
    13  11:29  Beehive 3.0°N of Moon
    14  13:10  Moon at Ascending Node 
    15  01:54  Regulus 0.2°S of Moon
    17  01:04  Mars 1.8°S of Moon
    17  15:21  Venus 2.0°S of Moon
    19  08     Uranus at Opposition 
    19  10:12  NEW MOON 
    21  02     Orionid Meteor Shower
    24  02:54  Saturn 3.3°S of Moon
    24  17:25  Moon at Apogee: 405151 km
    26  09     Jupiter in Conjunction with Sun 
    27  13:22  FIRST QUARTER MOON 
    28  21:41  Moon at Descending Node 

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

Dec 03  04:00  Aldebaran 0.8°S of Moon
    03  06:47  FULL MOON 
    03  23:42  Moon at Perigee: 357496 km
    06  15     Mercury 1.3° of Saturn
    07  00:30  Beehive 2.5°N of Moon
    07  15:39  Moon at Ascending Node 
    08  13:25  Regulus 0.7°S of Moon
    09  22:51  LAST QUARTER MOON 
    12  03     Mercury at Perihelion 
    12  17     Mercury at Inferior Conjunction 
    13  07:27  Mars 4.2°S of Moon
    13  21     Geminid Meteor Shower
    14  05:26  Jupiter 4.2°S of Moon
    17  21:31  NEW MOON 
    18  16:27  Moon at Apogee: 406605 km
    21  07:29  Winter Solstice 
    21  11     Saturn in Conjunction with Sun 
    22  01:04  Moon at Descending Node 
    22  06     Ursid Meteor Shower
    26  00:20  FIRST QUARTER MOON 
    30  15:25  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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