2013Calendar of Astronomical Events

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