2011Calendar of Astronomical Events

    
2011Phases of the Moon
Gulf Standard Time
The following table gives the date and time of the Moon's phases for the year. The times listed are for Gulf Standard Time(Greenwich Mean Time + 4 hours).If Daylight Saving Time is in effect, add one hour to the times listed. 
   
      2011 Phases of the Moon   
      Gulf Standard Time
 New Moon  First Quarter  Full Moon  Last Quarter 
 Jan  4  13:03 P  Jan 12  15:31    Jan 20  01:21    Jan 26  16:57   
 Feb  3  06:31    Feb 11  11:18    Feb 18  12:36    Feb 25  03:26   
 Mar  5  00:46    Mar 13  03:45    Mar 19  22:10    Mar 26  16:07   
 Apr  3  18:32    Apr 11  16:05    Apr 18  06:44    Apr 25  06:47   
 May  3  10:51    May 11  00:33    May 17  15:09    May 24  22:52   
 Jun  2  01:03 P  Jun  9  06:11    Jun 16  00:13 t  Jun 23  15:48   
 Jul  1  12:54 P  Jul  8  10:29    Jul 15  10:40    Jul 23  09:02   
 Jul 30  22:40    Aug  6  15:08    Aug 13  22:58    Aug 22  01:55   
 Aug 29  07:04    Sep  4  21:39    Sep 12  13:27    Sep 20  17:39   
 Sep 27  15:09    Oct  4  07:15    Oct 12  06:06    Oct 20  07:30   
 Oct 26  23:56    Nov  2  20:38    Nov 11  00:16    Nov 18  19:09   
 Nov 25  10:10 P  Dec  2  13:52    Dec 10  18:36 t  Dec 18  04:48   
 Dec 24  22:06   ---
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.
2011Calendar of Astronomical Events
Gulf Standard Time
The following table gives the date and time of the important astronomical events for the year. The times listed are for Gulf Standard Time(Greenwich Mean Time + 4 hours).If Daylight Saving Time is in effect, add one hour to the times listed. A key to astronomical terms appears below the calendar.
   
      2011Calendar of Astronomical Events   
   Gulf Standard Time  
 January - June   July - December 
Date     GST   Event        (h:m)Jan 01  22:07  Antares 2.5°S of Moon    02  18:32  Mercury 3.8°N of Moon    03  16:48  Moon at Ascending Node     03  23     Earth at Perihelion: 0.98334 AU    04  05     Quadrantid Meteor Shower    04  12:51  Partial Solar Eclipse; mag=0.858    04  13:03  NEW MOON     08  19     Venus at Greatest Elong: 47.0°W    09  18     Mercury at Greatest Elong: 23.3°W    10  09:38  Moon at Apogee: 404976 km    12  15:31  FIRST QUARTER MOON     15  16:39  Pleiades 1.3°N of Moon    18  04:06  Moon at Descending Node     20  01:21  FULL MOON     22  04:10  Moon at Perigee: 362793 km    22  05:55  Regulus 5.3°N of Moon    25  21:38  Spica 3.0°N of Moon    26  16:57  LAST QUARTER MOON     29  03:53  Antares 2.6°S of Moon    30  07:36  Venus 3.5°N of Moon    30  22:29  Moon at Ascending Node     31  13     Mercury at Aphelion Feb 01  22:14  Mercury 3.6°S of Moon    03  06:31  NEW MOON     04  21     Mars in Conjunction with Sun     07  03:13  Moon at Apogee: 405924 km    11  11:18  FIRST QUARTER MOON     12  01:32  Pleiades 1.4°N of Moon    14  12:14  Moon at Descending Node     17  13     Neptune in Conjunction with Sun     18  12:36  FULL MOON     18  16:18  Regulus 5.2°N of Moon    19  11:27  Moon at Perigee: 358247 km    22  05:02  Spica 2.8°N of Moon    25  03:26  LAST QUARTER MOON     25  09:26  Antares 2.8°S of Moon    25  12     Mercury at Superior Conjunction     27  00:19  Moon at Ascending Node Mar 01  07:40  Venus 1.6°S of Moon    05  00:46  NEW MOON     06  11:50  Moon at Apogee: 406584 km    09  18     Mars at Perihelion:  1.38138 AU    11  08:35  Pleiades 1.7°N of Moon    13  03:45  FIRST QUARTER MOON     13  15:55  Moon at Descending Node     16  00     Mercury 2.0°N of Jupiter    16  12     Mercury at Perihelion     17  21     Jupiter at Perihelion:  4.94839 AU    18  03:35  Regulus 5.3°N of Moon    19  22:10  FULL MOON     19  23:09  Moon at Perigee: 356578 km    21  03:21  Vernal Equinox     21  15:00  Spica 2.6°N of Moon    21  16     Uranus in Conjunction with Sun     23  05     Mercury at Greatest Elong: 18.6°E    24  16:48  Antares 3.0°S of Moon    26  01:09  Moon at Ascending Node     26  16:07  LAST QUARTER MOON Apr 02  13:00  Moon at Apogee: 406656 km    03  18:32  NEW MOON     04  03     Saturn at Opposition     06  19     Jupiter in Conjunction with Sun     07  14:19  Pleiades 1.9°N of Moon    09  16:48  Moon at Descending Node     09  23     Mercury at Inferior Conjunction     11  16:05  FIRST QUARTER MOON     14  13:34  Regulus 5.5°N of Moon    17  09:59  Moon at Perigee: 358088 km    18  02:04  Spica 2.5°N of Moon    18  06:44  FULL MOON     19  04     Venus at Aphelion     19  22     Mercury 0.6°N of Mars    21  02:21  Antares 3.2°S of Moon    22  05:05  Moon at Ascending Node     23  03     Lyrid Meteor Shower    25  06:47  LAST QUARTER MOON     29  22:02  Moon at Apogee: 406043 kmMay 01  08     Mars 0.4°N of Jupiter    03  10:51  NEW MOON     05  16     Eta-Aquarid Meteor Shower    06  18:54  Moon at Descending Node     07  23     Mercury at Greatest Elong: 26.6°W    08  09     Mercury 1.4°S of Venus    11  00:33  FIRST QUARTER MOON     11  19     Venus 0.6°S of Jupiter    11  21:05  Regulus 5.7°N of Moon    12  00     Mercury 2.1°S of Jupiter    15  12:08  Spica 2.6°N of Moon    15  15:18  Moon at Perigee: 362133 km    17  15:09  FULL MOON     18  11     Mercury 1.4°S of Venus    18  12:46  Antares 3.3°S of Moon    19  13:03  Moon at Ascending Node     21  12     Mercury 2.1°S of Mars    23  13     Venus 1.0°S of Mars    24  22:52  LAST QUARTER MOON     27  13:58  Moon at Apogee: 405006 km    29  18:31  Jupiter 5.7°S of Moon    31  00:04  Mars 3.8°S of Moon    31  08:00  Venus 4.4°S of MoonJun 02  01:03  NEW MOON     02  01:16  Partial Solar Eclipse; mag=0.601    03  00:21  Moon at Descending Node     08  02:45  Regulus 5.7°N of Moon    09  06:11  FIRST QUARTER MOON     09  18:50  Venus 5.0°S of Pleiades    11  19:57  Spica 2.6°N of Moon    12  05:42  Moon at Perigee: 367188 km    12  12     Mercury at Perihelion     13  03     Mercury at Superior Conjunction     14  22:17  Antares 3.3°S of Moon    15  22:35  Moon at Ascending Node     16  00:13  Total Lunar Eclipse; mag=1.700    16  00:13  FULL MOON     17  16:15  Venus 4.6°N of Aldebaran    21  05:24  Mars 4.2°S of Pleiades    21  21:16  Summer Solstice     23  15:48  LAST QUARTER MOON     24  08:13  Moon at Apogee: 404275 km    26  12:45  Jupiter 5.4°S of Moon    28  10:52  Pleiades 2.0°N of Moon    28  11:40  Mercury 4.7°S of Pollux    28  22:59  Mars 1.7°S of Moon    30  08:14  Moon at Descending Node 
Date     GST   Event        (h:m)Jul 01  12:38  Partial Solar Eclipse; mag=0.097    01  12:54  NEW MOON     03  06:11  Mercury 5.1°N of Moon    04  19     Earth at Aphelion: 1.01674 AU    04  23:18  Mars 5.4°N of Aldebaran    05  08:23  Regulus 5.7°N of Moon    06  21:36  Mercury 0.2°S of Beehive    07  18:04  Moon at Perigee: 369566 km    08  10:29  FIRST QUARTER MOON     09  01:44  Spica 2.6°N of Moon    12  05:48  Antares 3.3°S of Moon    13  06:27  Moon at Ascending Node     15  10:40  FULL MOON     20  09     Mercury at Greatest Elong: 26.8°E    22  02:46  Moon at Apogee: 404358 km    23  09:02  LAST QUARTER MOON     24  04:34  Jupiter 5.1°S of Moon    25  19:28  Pleiades 2.1°N of Moon    26  11     Mercury at Aphelion     26  16:51  Mercury 2.1°S of Regulus    27  16:03  Moon at Descending Node     27  20:52  Mars 0.5°N of Moon: Occn.    28  18     Delta-Aquarid Meteor Shower    30  22:40  NEW MOON Aug 01  15:20  Mercury 1.5°N of Moon    01  15:41  Regulus 5.6°N of Moon    03  00:59  Moon at Perigee: 365756 km    05  07:08  Spica 2.4°N of Moon    06  15:08  FIRST QUARTER MOON     08  11:32  Antares 3.5°S of Moon    09  10:35  Moon at Ascending Node     09  12     Venus at Perihelion     13  10     Perseid Meteor Shower    13  22:58  FULL MOON     16  16     Venus at Superior Conjunction     17  05     Mercury at Inferior Conjunction     18  20:23  Moon at Apogee: 405161 km    20  16:13  Jupiter 4.8°S of Moon    22  01:55  LAST QUARTER MOON     22  03:40  Pleiades 2.3°N of Moon    23  02     Neptune at Opposition     23  21:23  Moon at Descending Node     25  17:36  Mars 2.7°N of Moon    28  05:07  Mercury 2.6°N of Moon    29  07:04  NEW MOON     30  21:35  Moon at Perigee: 360858 kmSep 01  14:06  Spica 2.2°N of Moon    03  10     Mercury at Greatest Elong: 18.1°W    04  17:00  Antares 3.7°S of Moon    04  21:39  FIRST QUARTER MOON     05  11:36  Moon at Ascending Node     08  11     Mercury at Perihelion     08  12:45  Mars 5.8°S of Pollux    09  06:18  Mercury 0.6°N of Regulus    12  13:27  FULL MOON     15  10:23  Moon at Apogee: 406068 km    16  22:20  Jupiter 4.7°S of Moon    18  10:46  Pleiades 2.5°N of Moon    19  23:38  Moon at Descending Node     20  17:39  LAST QUARTER MOON     23  12:23  Mars 4.8°N of Moon    23  13:05  Autumnal Equinox     25  11:49  Regulus 5.7°N of Moon    26  04     Uranus at Opposition     27  15:09  NEW MOON     28  05:01  Moon at Perigee: 357556 km    29  00     Mercury at Superior Conjunction     30  07     Venus 1.3°S of SaturnOct 01  04:53  Mars 0.4°S of Beehive    02  00:04  Antares 3.9°S of Moon    02  13:09  Moon at Ascending Node     04  07:15  FIRST QUARTER MOON     12  06:06  FULL MOON     12  15:43  Moon at Apogee: 406435 km    13  23:28  Jupiter 4.8°S of Moon    14  01     Saturn in Conjunction with Sun     15  16:49  Pleiades 2.7°N of Moon    17  01:01  Moon at Descending Node     20  07:30  LAST QUARTER MOON     22  02     Orionid Meteor Shower    22  21:52  Regulus 5.8°N of Moon    26  16:26  Moon at Perigee: 357051 km    26  23:56  NEW MOON     28  06:14  Mercury 0.2°N of Moon: Occn.    28  09:11  Venus 1.8°N of Moon    29  05     Jupiter at Opposition     29  09:37  Antares 4.1°S of Moon    29  18:59  Moon at Ascending Node Nov 02  00     Mercury 2.0°S of Venus    02  20:38  FIRST QUARTER MOON     06  02     S Taurid Meteor Shower    08  17:20  Moon at Apogee: 406177 km    09  22:40  Jupiter 5.0°S of Moon    10  11:51  Venus 3.8°N of Antares    10  12:27  Mercury 1.9°N of Antares    10  22:21  Mars 1.3°N of Regulus    11  00:16  FULL MOON     11  15:32  Saturn 4.0°N of Spica    11  22:43  Pleiades 2.8°N of Moon    12  21:18  Aldebaran 5.9°S of Moon    13  02     N Taurid Meteor Shower    13  04:35  Moon at Descending Node     13  12     Mercury 2.0°S of Venus    14  13     Mercury at Greatest Elong: 22.7°E    18  08     Leonid Meteor Shower    18  19:09  LAST QUARTER MOON     19  05:42  Regulus 6.0°N of Moon    22  21:21  Spica 2.1°N of Moon    24  03:24  Moon at Perigee: 359692 km    25  10:10  NEW MOON     25  10:20  Partial Solar Eclipse; mag=0.905    26  05:02  Moon at Ascending Node     26  13:48  Mercury 1.7°S of Moon    27  08:29  Venus 2.8°S of MoonDec 02  13:52  FIRST QUARTER MOON     04  13     Mercury at Inferior Conjunction     05  10     Mercury at Perihelion     06  05:13  Moon at Apogee: 405414 km    07  00:10  Jupiter 5.2°S of Moon    09  05:26  Pleiades 2.8°N of Moon    10  03:51  Aldebaran 5.9°S of Moon    10  11:04  Moon at Descending Node     10  18:32  Total Lunar Eclipse; mag=1.106    10  18:36  FULL MOON     14  21     Geminid Meteor Shower    16  11:26  Regulus 6.0°N of Moon    18  04:48  LAST QUARTER MOON     20  05:37  Spica 2.1°N of Moon    22  06:56  Moon at Perigee: 364801 km    22  09:30  Winter Solstice     23  06     Ursid Meteor Shower    23  07     Mercury at Greatest Elong: 21.8°W    23  07:05  Antares 4.1°S of Moon    23  07:50  Mercury 2.6°N of Moon    23  15:36  Moon at Ascending Node     24  14:36  Mercury 6.3°N of Antares    24  22:06  NEW 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