2017Calendar of Astronomical Events

    
2017Phases of the Moon
Pacific Standard Time
The following table gives the date and time of the Moon's phases for the year. The times listed are for Pacific Standard Time(Greenwich Mean Time - 8 hours).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.
2017Calendar of Astronomical Events
Pacific Standard Time
The following table gives the date and time of the important astronomical events for the year. The times listed are for Pacific Standard Time(Greenwich Mean Time - 8 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   
   Pacific Standard Time  
 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°N 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 MoonFeb 02  05     Venus 5.4°N of Mars    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    16  23     Jupiter at Aphelion:  5.45652 AU    18  11:33  LAST QUARTER MOON     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 MoonApr 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 MoonMay 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 MoonJun 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 BeehiveSep 04  10:41  Moon at Descending Node     04  16     Mercury 3.2°S 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°N 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  08     Venus 0.2°N of Mars    05  10:40  FULL MOON     07  14     Mars at Aphelion:  1.66609 AU    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    13  00     Venus 0.3°N of Jupiter    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 SpicaDec 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°S 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    

 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