2011Calendar of Astronomical Events

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