2011Calendar of Astronomical Events

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