2013Calendar of Astronomical Events

    
2013Phases 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. 
   
      2013 Phases of the Moon   
      Pacific Standard Time
 New Moon  First Quarter  Full Moon  Last Quarter 
--- Jan  4  19:58   
 Jan 11  11:44    Jan 18  15:45    Jan 26  20:38    Feb  3  05:56   
 Feb  9  23:20    Feb 17  12:31    Feb 25  12:26    Mar  4  13:53   
 Mar 11  11:51    Mar 19  09:27    Mar 27  01:27    Apr  2  20:37   
 Apr 10  01:35    Apr 18  04:31    Apr 25  11:57 p  May  2  03:14   
 May  9  16:29 A  May 17  20:35    May 24  20:25 n  May 31  10:58   
 Jun  8  07:56    Jun 16  09:24    Jun 23  03:32    Jun 29  20:54   
 Jul  7  23:14    Jul 15  19:18    Jul 22  10:15    Jul 29  09:43   
 Aug  6  13:51    Aug 14  02:56    Aug 20  17:45    Aug 28  01:35   
 Sep  5  03:36    Sep 12  09:08    Sep 19  03:13    Sep 26  19:56   
 Oct  4  16:35    Oct 11  15:02    Oct 18  15:38 n  Oct 26  15:41   
 Nov  3  04:50 H  Nov  9  21:57    Nov 17  07:16    Nov 25  11:28   
 Dec  2  16:22    Dec  9  07:12    Dec 17  01:28    Dec 25  05:48   
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.
2013Calendar 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.
   
      2013Calendar of Astronomical Events   
   Pacific Standard Time  
 January - June   July - December 
Date     PST   Event        (h:m)Jan 01  13:13  Regulus 5.9°N of Moon    01  21     Earth at Perihelion: 0.98329 AU    03  06     Quadrantid Meteor Shower    03  19     Mercury at Aphelion     04  19:58  LAST QUARTER MOON     05  11:54  Spica 0.6°N of Moon    06  17:28  Saturn 3.7°N of Moon    07  15:50  Moon at Ascending Node     08  14:55  Antares 5.9°S of Moon    10  02:26  Moon at Perigee: 360048 km    10  03:36  Venus 2.8°S of Moon    11  11:44  NEW MOON     18  01     Mercury at Superior Conjunction     18  15:45  FIRST QUARTER MOON     20  17:19  Moon at Descending Node     21  18:57  Jupiter 0.5°N of Moon: Occn.    22  02:52  Moon at Apogee: 405313 km    22  03:13  Aldebaran 4.0°S of Moon    24  01     Mars at Perihelion:  1.38149 AU    26  20:38  FULL MOON     28  18:57  Regulus 5.8°N of MoonFeb 01  17:25  Spica 0.3°N of Moon    03  01:55  Saturn 3.5°N of Moon    03  05:56  LAST QUARTER MOON     03  18:14  Moon at Ascending Node     04  22:39  Antares 6.1°S of Moon    07  04:09  Moon at Perigee: 365314 km    08  08     Mercury 0.3°N of Mars    09  23:20  NEW MOON     11  09:51  Mercury 5.2°S of Moon    16  13     Mercury at Greatest Elong: 18.1°E    16  18     Mercury at Perihelion     16  18:57  Moon at Descending Node     17  12:31  FIRST QUARTER MOON     18  03:31  Jupiter 0.9°N of Moon: Occn.    18  10:49  Aldebaran 3.8°S of Moon    18  22:30  Moon at Apogee: 404475 km    20  18     Venus at Aphelion     20  23     Neptune in Conjunction with Sun     25  02:18  Regulus 5.7°N of Moon    25  12:26  FULL MOON     25  14     Mercury 4.1°N of Mars    28  22:56  Spica 0.1°N of MoonMar 02  07:21  Saturn 3.3°N of Moon    02  18:30  Moon at Ascending Node     04  04:11  Antares 6.4°S of Moon    04  05     Mercury at Inferior Conjunction     04  13:53  LAST QUARTER MOON     05  15:20  Moon at Perigee: 369954 km    11  11:51  NEW MOON     15  22:15  Moon at Descending Node     17  17:16  Jupiter 1.5°N of Moon    17  17:24  Jupiter 5.0°N of Aldebaran    17  18:56  Aldebaran 3.5°S of Moon    18  19:13  Moon at Apogee: 404262 km    19  09:27  FIRST QUARTER MOON     20  03:02  Vernal Equinox     24  11:17  Regulus 5.8°N of Moon    27  01:27  FULL MOON     28  06:29  Spica 0.0°N of Moon    28  09     Venus at Superior Conjunction     28  16     Uranus in Conjunction with Sun     29  12:18  Saturn 3.3°N of Moon    29  21:55  Moon at Ascending Node     30  19:55  Moon at Perigee: 367494 km    31  14     Mercury at Greatest Elong: 27.8°WApr 02  20:37  LAST QUARTER MOON     10  01:35  NEW MOON     12  04:12  Moon at Descending Node     14  02:51  Aldebaran 3.4°S of Moon    14  10:23  Jupiter 2.1°N of Moon    15  14:21  Moon at Apogee: 404865 km    17  16     Mars in Conjunction with Sun     18  04:31  FIRST QUARTER MOON     20  20:44  Regulus 5.9°N of Moon    22  03     Lyrid Meteor Shower    24  16:10  Spica 0.0°N of Moon    25  11:57  FULL MOON     25  12:07  Partial Lunar Eclipse; mag=0.015    25  18:28  Saturn 3.5°N of Moon    26  06:07  Moon at Ascending Node     27  11:48  Moon at Perigee: 362268 km    28  00     Saturn at Opposition May 02  03:14  LAST QUARTER MOON     04  16     Eta-Aquarid Meteor Shower    09  11:12  Moon at Descending Node     09  16:25  Annular Solar Eclipse; mag=0.954    09  16:29  NEW MOON     11  13     Mercury at Superior Conjunction     12  05:03  Jupiter 2.6°N of Moon    13  05:31  Moon at Apogee: 405827 km    15  18     Mercury at Perihelion     17  20:35  FIRST QUARTER MOON     18  05:14  Regulus 5.9°N of Moon    22  02:35  Spica 0.0°N of Moon    23  01:55  Saturn 3.7°N of Moon    23  16:40  Moon at Ascending Node     24  13     Mercury 1.4°N of Venus    24  20:10  Pen. Lunar Eclipse; mag=0.016    24  20:25  FULL MOON     25  03:45  Antares 6.6°S of Moon    25  17:45  Moon at Perigee: 358375 km    26  22     Mercury 2.4°N of Jupiter    28  09     Venus 1.0°N of Jupiter    31  10:58  LAST QUARTER MOON Jun 05  16:59  Moon at Descending Node     08  07:56  NEW MOON     09  13:40  Moon at Apogee: 406487 km    10  03:19  Venus 5.3°N of Moon    12  09     Mercury at Greatest Elong: 24.3°E    13  03     Venus at Perihelion     14  12:06  Regulus 5.8°N of Moon    16  09:24  FIRST QUARTER MOON     18  04:57  Mercury 6.1°S of Pollux    18  11:56  Spica 0.1°S of Moon    19  07     Jupiter in Conjunction with Sun     19  09:45  Saturn 3.6°N of Moon    19  23     Mercury 1.9°S of Venus    20  01:51  Moon at Ascending Node     20  21:04  Summer Solstice     21  20:49  Venus 5.1°S of Pollux    23  03:09  Moon at Perigee: 356990 km    23  03:32  FULL MOON     28  17     Mercury at Aphelion     29  20:54  LAST QUARTER MOON 
Date     PST   Event        (h:m)Jul 02  20:15  Moon at Descending Node     03  07:26  Venus 0.1°N of Beehive    04  22:09  Aldebaran 3.4°S of Moon    05  07     Earth at Aphelion: 1.01671 AU    06  16:36  Moon at Apogee: 406493 km    07  23:14  NEW MOON     09  11     Mercury at Inferior Conjunction     11  17:45  Regulus 5.7°N of Moon    15  19:13  Spica 0.3°S of Moon    15  19:18  FIRST QUARTER MOON     16  17:19  Saturn 3.3°N of Moon    17  06:58  Moon at Ascending Node     21  12:27  Moon at Perigee: 358402 km    21  21     Mars 0.8°N of Jupiter    22  01:30  Venus 1.0°N of Regulus    22  10:15  FULL MOON     27  18     Delta-Aquarid Meteor Shower    28  11     Mercury 6.9°S of Mars    29  09:43  LAST QUARTER MOON     29  21:50  Moon at Descending Node     30  01     Mercury at Greatest Elong: 19.6°WAug 01  04:22  Aldebaran 3.2°S of Moon    03  00:53  Moon at Apogee: 405834 km    03  14:22  Jupiter 4.0°N of Moon    04  14:31  Mercury 7.3°S of Pollux    05  00:39  Mercury 4.4°N of Moon    06  13:51  NEW MOON     09  18:19  Venus 5.1°N of Moon    11  17     Mercury at Perihelion     12  00:46  Spica 0.6°S of Moon    12  10     Perseid Meteor Shower    13  00:51  Saturn 2.8°N of Moon    13  08:20  Moon at Ascending Node     14  02:56  FIRST QUARTER MOON     17  09:03  Mars 5.8°S of Pollux    18  17:26  Moon at Perigee: 362265 km    20  17:45  FULL MOON     24  13     Mercury at Superior Conjunction     26  00:19  Moon at Descending Node     26  16     Neptune at Opposition     28  01:35  LAST QUARTER MOON     28  11:32  Aldebaran 2.9°S of Moon    30  15:46  Moon at Apogee: 404883 km    31  08:38  Jupiter 4.5°N of MoonSep 05  03:36  NEW MOON     05  16:37  Venus 1.5°N of Spica    08  02:00  Mars 0.5°S of Beehive    08  06:11  Spica 0.8°S of Moon    08  13:04  Venus 0.4°N of Moon: Occn.    09  09:29  Moon at Ascending Node     09  09:29  Saturn 2.3°N of Moon    12  09:08  FIRST QUARTER MOON     15  08:34  Moon at Perigee: 367388 km    18  12     Venus 3.5°S of Saturn    19  03:13  FULL MOON     22  05:48  Moon at Descending Node     22  12:44  Autumnal Equinox     24  14:29  Mercury 0.7°N of Spica    24  19:39  Aldebaran 2.7°S of Moon    26  19:56  LAST QUARTER MOON     27  10:17  Moon at Apogee: 404309 km    28  01:05  Jupiter 4.9°N of MoonOct 01  14:19  Regulus 5.6°N of Moon    03  05     Uranus at Opposition     03  11     Venus at Aphelion     04  16:35  NEW MOON     06  14:08  Moon at Ascending Node     06  14:28  Mercury 2.8°S of Moon    06  20:30  Saturn 1.9°N of Moon    08  04:07  Venus 4.7°S of Moon    08  05     Mercury 5.0°S of Saturn    09  02     Mercury at Greatest Elong: 25.3°E    10  15:06  Moon at Perigee: 369813 km    11  15:02  FIRST QUARTER MOON     14  19:51  Mars 0.9°N of Regulus    16  10:26  Venus 1.5°N of Antares    18  15:38  FULL MOON     18  15:50  Pen. Lunar Eclipse; mag=0.765    19  13:47  Moon at Descending Node     21  02     Orionid Meteor Shower    22  04:06  Aldebaran 2.7°S of Moon    25  06:25  Moon at Apogee: 404561 km    25  13:55  Jupiter 5.1°N of Moon    26  15:41  LAST QUARTER MOON     28  23:17  Regulus 5.7°N of MoonNov 01  01     Venus at Greatest Elong: 47.1°E    01  12     Mercury at Inferior Conjunction     02  22:52  Moon at Ascending Node     03  04:46  Hybrid Solar Eclipse; mag=1.016    03  04:50  NEW MOON     05  03     S Taurid Meteor Shower    06  01:28  Moon at Perigee: 365362 km    06  03     Saturn in Conjunction with Sun     07  16     Mercury at Perihelion     08  07:08  Jupiter 6.1°S of Pollux    09  21:57  FIRST QUARTER MOON     12  02     N Taurid Meteor Shower    15  21:30  Moon at Descending Node     17  07:16  FULL MOON     17  08     Leonid Meteor Shower    17  18     Mercury at Greatest Elong: 19.5°W    18  12:00  Aldebaran 2.7°S of Moon    21  21:21  Jupiter 5.1°N of Moon    22  01:50  Moon at Apogee: 405446 km    25  07:45  Regulus 5.6°N of Moon    25  11:28  LAST QUARTER MOON     25  21     Mercury 0.3°S of Saturn    27  08:10  Mars 5.7°N of Moon    29  08:43  Spica 0.9°S of Moon    30  08:59  Moon at Ascending Node Dec 01  02:13  Saturn 1.2°N of Moon: Occn.    02  16:22  NEW MOON     04  02:15  Moon at Perigee: 360065 km    09  07:12  FIRST QUARTER MOON     13  02:10  Moon at Descending Node     13  21     Geminid Meteor Shower    15  18:45  Aldebaran 2.7°S of Moon    17  01:28  FULL MOON     18  23:11  Jupiter 5.0°N of Moon    19  15:49  Moon at Apogee: 406269 km    21  09:11  Winter Solstice     21  16     Mercury at Aphelion     22  06     Ursid Meteor Shower    22  14:47  Regulus 5.4°N of Moon    25  05:48  LAST QUARTER MOON     25  18:45  Mars 4.6°N of Moon    26  18:10  Spica 1.0°S of Moon    27  16:21  Moon at Ascending Node     28  17:42  Saturn 0.9°N of Moon: Occn.    28  22     Mercury at Superior Conjunction     

 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