2017Calendar of Astronomical Events

    
2017Phases of the Moon
Eastern Standard Time
The following table gives the date and time of the Moon's phases for the year. The times listed are for Eastern Standard Time(Greenwich Mean Time - 5 hours).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.
2017Calendar of Astronomical Events
Eastern Standard Time
The following table gives the date and time of the important astronomical events for the year. The times listed are for Eastern Standard Time(Greenwich Mean Time - 5 hours).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   
   Eastern Standard Time  
 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°N 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 MoonFeb 02  08     Venus 5.4°N of Mars    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    17  02     Jupiter at Aphelion:  5.45652 AU    18  14:33  LAST QUARTER MOON     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 MoonApr 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 MoonMay 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 MoonJun 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 MoonSep 01  01:08  Venus 1.4°S of Beehive    04  13:41  Moon at Descending Node     04  19     Mercury 3.2°S 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°N 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  11     Venus 0.2°N of Mars    05  13:40  FULL MOON     07  17     Mars at Aphelion:  1.66609 AU    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    13  03     Venus 0.3°N of Jupiter    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 SpicaDec 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°S 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    

 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
The Americas
Below are links to calendars of astronomical events from 2011 to 2020 for seven time zones in the Americas. 
Choose a time zone and click on a year to get a calendar of astronomical events for that year.
   Calendars of Astronomical Events - The Americas
   AST    2011     2012     2013     2014     2015     2016     2017     2018     2019     2020 
   EST    2011     2012     2013     2014     2015     2016     2017     2018     2019     2020 
   CST    2011     2012     2013     2014     2015     2016     2017     2018     2019     2020 
   MST    2011     2012     2013     2014     2015     2016     2017     2018     2019     2020 
   PST    2011     2012     2013     2014     2015     2016     2017     2018     2019     2020 
   AKST    2011     2012     2013     2014     2015     2016     2017     2018     2019     2020 
   HST    2011     2012     2013     2014     2015     2016     2017     2018     2019     2020 
        Time Zones Abbreviations
        • AST = Atlantic Standard Time (= GMT - 4 hours)
        • EST = Eastern Standard Time (= GMT - 5 hours)
        • CST = Central Standard Time (= GMT - 6 hours)
        • MST = Mountain Standard Time (= GMT - 7 hours)
        • PST = Pacific Standard Time (= GMT - 8 hours)
        • AKST = Alaskan Standard Time (= GMT - 9 hours)
        • HST = Hawaiian Standard Time (= GMT - 10 hours)
           (where GMT = Greenwich Mean Time)
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