2017Calendar of Astronomical Events

    
2017Phases of the Moon
Greenwich Mean Time
The following table gives the date and time of the Moon's phases for the year. The times listed are for Greenwich Mean Time.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.
2017Calendar of Astronomical Events
Greenwich Mean Time
The following table gives the date and time of the important astronomical events for the year. The times listed are for Greenwich Mean Time.If Daylight Saving Time is in effect, add one hour to the times listed. A key to astronomical terms appears below the calendar.
   
      2017Calendar of Astronomical Events   
   Greenwich Mean Time  
 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°N 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 MoonFeb 01  01:09  Mars 2.3°N of Moon    02  13     Venus 5.4°N of Mars    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    17  07     Jupiter at Aphelion:  5.45652 AU    18  19:33  LAST QUARTER MOON     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 MoonApr 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 MoonMay 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 MoonJun 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 MoonSep 01  06:08  Venus 1.4°S of Beehive    04  18:41  Moon at Descending Node     05  00     Mercury 3.2°S 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°N 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  16     Venus 0.2°N of Mars    05  18:40  FULL MOON     07  22     Mars at Aphelion:  1.66609 AU    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    13  08     Venus 0.3°N of Jupiter    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 SpicaDec 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°S 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    

 Terms Used in Astronomical Events Calendar 
  • Perihelion - instant when a planet is closest to the Sun
  • Aphelion - instant when a planet is furthest from the Sun
  • Perigee - instant when the Moon is closest to Earth
  • Apogee - instant when the Moon is furthest from Earth
  • Inferior Conjunction - instant when a planet (Mercury or Venus) passes between Earth and the Sun
  • Superior Conjunction - instant when a planet (Mercury or Venus) passes on the opposite side of the Sun from Earth 
  • Greatest Elongation - the maximum angular separation between the Sun and the planet (Mercury or Venus) 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 - instant when a planet appears opposite the Sun as seen from Earth
  • Conjunction - instant when a planet appears closest the Sun as seen from Earth
  • Occultation - the Moon occults or eclipses a star or planet
  • Ascending Node - point where the Moon crosses from the southern to northern portion of its orbit
  • Descending Node - point where the Moon crosses from the northern to the southern portion of its orbit

  • Aldebaran - bright star in the constellation Taurus
  • Pollux - bright star in the constellation Gemini
  • Regulus - bright star in the constellation Leo
  • Spica - bright star in the constellation Virgo
  • Antares - bright star in the constellation Scorpius
  • Pleiades - bright star cluster in the constellation Taurus
  • Beehive - bright star cluster in the constellation Cancer
Calendars of Astronomical Events: 2011 to 2020
Europe, Africa, and the Middle East
Below are links to calendars of astronomical events from 2011 to 2020 for five time zones 
in Europe, Africa, and the Middle East. 
Choose a time zone and click on a year to get a calendar of astronomical events for that year.
   Calendar of Astronomical Events - Europe, Africa, & Middle East
   GMT    2011     2012     2013     2014     2015     2016     2017     2018     2019     2020 
   CET    2011     2012     2013     2014     2015     2016     2017     2018     2019     2020 
   EET    2011     2012     2013     2014     2015     2016     2017     2018     2019     2020 
   MSK    2011     2012     2013     2014     2015     2016     2017     2018     2019     2020 
   GST    2011     2012     2013     2014     2015     2016     2017     2018     2019     2020 
        Time Zones Abbreviations
        • GMT = Greenwich Mean Time 
        • CET = Central European Time (= GMT + 1 hour)
        • EET = Eastern European Time (= GMT + 2 hours)
        • MSK = Moscow Time (= GMT + 3 hours)
        • GST = Gulf Standard Time (= GMT + 4 hours)
A time zone may have a different name in different countries. Note the difference in hours between a given time zone and Greenwich Mean Time to help in identification.
For other years and other time zones, visit: Calendars of Astronomical Events.
 
Accuracy of the Astronomical Events Calendars
The goal of the Astronomical Events Calendars is to present a wide range of solar system phenomena with reasonable accuracy. In general, events listed to the nearest hour are accurate to ± 30 minutes.Events listed with a precision in hours and minutes (i.e., hh:mm) are typically accurate to ± 5 minutes or less.  
The following table gives a more detailed breakdown of the accuracy of times for various astronomical events.
Accuracy of the Astronomical Events Calendars
 Solstice/Equinox (Earth)  ± 0.5 minute 
 Aphelion/Perihelion (Earth)  ± 30 minutes;  ± 0.00001 AU 
 Solar and Lunar Eclipses   ± 0.5 minute 
 Phases of the Moon  ± 0.5 minute 
 Moon at Nodes  ± 2 minutes 
 Apogee/Perigee of Moon  ± 5 minutes; ± 5 kilometers 
 Conjunctions of Moon with Star or Planet  ± 10 minutes 
 Conjunctions of Planet with Planet  ± 3 hours 
 Inferior/Superior Conjunctions (Mercury & Venus)  ± 30 minutes 
 Greatest Elongation (Mercury & Venus)  ± 30 minutes 
 Opposition/Conjunction (Outer Planets)  ± 3 hours 
 Aphelion/Perihelion of Planets  ± 30 minutes 

Acknowledgements
All calculations are by Fred Espenak and he assumes full responsibility for their accuracy. Algorithms used in predicting many of the astronomical events 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: 

Return to: Calendars of Astronomical Events
Return to: Planetary Ephemeris Data