2021Calendar of Astronomical Events

    
2021Phases 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. 
   
      2021 Phases of the Moon   
      Moskow Time
 New Moon  First Quarter  Full Moon  Last Quarter 
--- Jan  6  12:37   
 Jan 13  08:00    Jan 21  00:02    Jan 28  22:16    Feb  4  20:37   
 Feb 11  22:06    Feb 19  21:47    Feb 27  11:17    Mar  6  04:30   
 Mar 13  13:21    Mar 21  17:40    Mar 28  21:48    Apr  4  13:02   
 Apr 12  05:31    Apr 20  09:59    Apr 27  06:31    May  3  22:50   
 May 11  22:00    May 19  22:13    May 26  14:14 t  Jun  2  10:24   
 Jun 10  13:53 A  Jun 18  06:54    Jun 24  21:40    Jul  2  00:11   
 Jul 10  04:17    Jul 17  13:11    Jul 24  05:37    Jul 31  16:16   
 Aug  8  16:50    Aug 15  18:20    Aug 22  15:02    Aug 30  10:13   
 Sep  7  03:52    Sep 13  23:39    Sep 21  02:55    Sep 29  04:57   
 Oct  6  14:05    Oct 13  06:25    Oct 20  17:57    Oct 28  23:05   
 Nov  5  00:15    Nov 11  15:46    Nov 19  11:58 p  Nov 27  15:28   
 Dec  4  10:43 T  Dec 11  04:36    Dec 19  07:36    Dec 27  05:24   
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.
2021Calendar 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.
   
      2021Calendar of Astronomical Events   
   Moskow Time  
 January - June   July - December 
Date     MSK   Event        (h:m)Jan 01  10:05  Beehive 2.3°S of Moon    02  17     Earth at Perihelion: 0.98325 AU    03  00:58  Regulus 4.7°S of Moon    03  18     Quadrantid Meteor Shower    06  12:37  LAST QUARTER MOON     09  18:39  Moon at Perigee: 367390 km    10  05:08  Antares 5.6°S of Moon    10  08     Mercury 1.6°S of Saturn    10  23:14  Moon at Descending Node     11  21     Mercury 1.4°S of Jupiter    11  23:12  Venus 1.5°N of Moon    13  08:00  NEW MOON     14  11:15  Mercury 2.3°N of Moon    21  00:02  FIRST QUARTER MOON     21  08:37  Mars 5.1°N of Moon    21  16:11  Moon at Apogee: 404361 km    24  05     Mercury at Greatest Elong: 18.6°E    24  05     Saturn in Conjunction with Sun     24  07:39  Aldebaran 4.7°S of Moon    25  00:47  Moon at Ascending Node     27  18:46  Pollux 3.8°N of Moon    28  17:50  Beehive 2.3°S of Moon    28  22:16  FULL MOON     29  04     Jupiter in Conjunction with Sun     29  05     Mercury at Perihelion     30  07:56  Regulus 4.6°S of MoonFeb 03  22:33  Moon at Perigee: 370127 km    04  20:37  LAST QUARTER MOON     06  11     Venus 0.4°S of Saturn    06  11:33  Antares 5.5°S of Moon    07  03:29  Moon at Descending Node     08  17     Mercury at Inferior Conjunction     11  17     Venus 0.4°S of Jupiter    11  22:06  NEW MOON     13  12     Mercury 4.6°N of Venus    15  17     Mercury 3.8°N of Jupiter    18  13:22  Moon at Apogee: 404467 km    19  01:47  Mars 3.7°N of Moon    19  21:47  FIRST QUARTER MOON     20  08     Venus at Aphelion     20  16:15  Aldebaran 5.0°S of Moon    21  04:44  Moon at Ascending Node     23  11     Mercury 4.0°N of Saturn    24  04:10  Pollux 3.7°N of Moon    25  03:16  Beehive 2.4°S of Moon    26  17:04  Regulus 4.6°S of Moon    27  11:17  FULL MOON Mar 02  08:19  Moon at Perigee: 365422 km    04  02:36  Mars 2.6°S of Pleiades    05  08     Mercury 0.3°N of Jupiter    05  16:58  Antares 5.2°S of Moon    06  03:56  Moon at Descending Node     06  04:30  LAST QUARTER MOON     06  14     Mercury at Greatest Elong: 27.3°W    10  02:02  Saturn 3.7°N of Moon    10  18:35  Jupiter 4.0°N of Moon    11  03     Neptune in Conjunction with Sun     11  04:02  Mercury 3.7°N of Moon    13  13:21  NEW MOON     14  05     Mercury at Aphelion     18  08:04  Moon at Apogee: 405253 km    19  20:48  Mars 1.9°N of Moon    20  00:13  Aldebaran 5.2°S of Moon    20  06:31  Moon at Ascending Node     20  12:37  Vernal Equinox     20  22:15  Mars 6.9°N of Aldebaran    21  17:40  FIRST QUARTER MOON     23  13:26  Pollux 3.5°N of Moon    24  12:58  Beehive 2.6°S of Moon    26  03:17  Regulus 4.7°S of Moon    26  09     Venus at Superior Conjunction     28  21:48  FULL MOON     29  18:52  Spica 6.5°S of Moon    30  09:12  Moon at Perigee: 360311 kmApr 01  23:49  Antares 4.9°S of Moon    02  05:41  Moon at Descending Node     04  13:02  LAST QUARTER MOON     06  11:34  Saturn 4.0°N of Moon    07  10:15  Jupiter 4.4°N of Moon    12  05:31  NEW MOON     14  20:47  Moon at Apogee: 406120 km    16  07:07  Aldebaran 5.4°S of Moon    16  08:53  Moon at Ascending Node     17  15:09  Mars 0.1°N of Moon: Occn.    19  05     Mercury at Superior Conjunction     19  21:18  Pollux 3.2°N of Moon    20  09:59  FIRST QUARTER MOON     20  21:25  Beehive 2.8°S of Moon    22  12:48  Regulus 4.9°S of Moon    22  15     Lyrid Meteor Shower    26  05:43  Spica 6.5°S of Moon    27  04     Mercury at Perihelion     27  06:31  FULL MOON     27  18:24  Moon at Perigee: 357379 km    29  09:07  Antares 4.8°S of Moon    29  12:17  Moon at Descending Node May 01  00     Uranus in Conjunction with Sun     03  20:02  Saturn 4.2°N of Moon    03  22:50  LAST QUARTER MOON     04  06:03  Mercury 2.1°S of Pleiades    05  00:00  Jupiter 4.6°N of Moon    05  04     Eta-Aquarid Meteor Shower    11  22:00  NEW MOON     12  00:54  Moon at Apogee: 406512 km    13  13:29  Moon at Ascending Node     13  20:59  Mercury 2.1°N of Moon    16  07:47  Mars 1.5°S of Moon    17  03:39  Pollux 3.1°N of Moon    17  09     Mercury at Greatest Elong: 22.0°E    18  04:08  Beehive 2.9°S of Moon    19  20:28  Regulus 5.0°S of Moon    19  22:13  FIRST QUARTER MOON     23  16:07  Spica 6.5°S of Moon    26  04:52  Moon at Perigee: 357310 km    26  14:14  FULL MOON     26  14:19  Total Lunar Eclipse; mag=1.009    26  19:55  Antares 4.8°S of Moon    26  22:38  Moon at Descending Node     29  06     Mercury 0.4°S of Venus    31  04:22  Saturn 4.2°N of Moon    31  14:41  Mars 5.2°S of PolluxJun 01  11:57  Jupiter 4.6°N of Moon    02  10:24  LAST QUARTER MOON     08  05:27  Moon at Apogee: 406230 km    09  19:42  Moon at Ascending Node     10  13:42  Annular Solar Eclipse; mag=0.943    10  13:53  NEW MOON     11  04     Mercury at Inferior Conjunction     12  09:44  Venus 1.5°S of Moon    12  16     Venus at Perihelion     13  09:19  Pollux 3.1°N of Moon    13  22:52  Mars 2.8°S of Moon    14  09:47  Beehive 2.9°S of Moon    16  02:28  Regulus 5.0°S of Moon    18  06:54  FIRST QUARTER MOON     21  06:32  Summer Solstice     21  18:57  Venus 5.1°S of Pollux    22  23:36  Mercury 1.8°N of Aldebaran    23  06:26  Antares 4.8°S of Moon    23  08:21  Mars 0.3°S of Beehive    23  09:07  Moon at Descending Node     23  12:58  Moon at Perigee: 359960 km    24  21:40  FULL MOON     27  12:30  Saturn 4.0°N of Moon    28  21:38  Jupiter 4.5°N of Moon
Date     MSK   Event        (h:m)Jul 02  00:11  LAST QUARTER MOON     03  05:45  Venus 0.1°N of Beehive    04  23     Mercury at Greatest Elong: 21.6°W    05  17:48  Moon at Apogee: 405342 km    06  02     Earth at Aphelion: 1.01673 AU    07  01:41  Moon at Ascending Node     07  01:52  Aldebaran 5.5°S of Moon    08  07:38  Mercury 3.7°S of Moon    10  04:17  NEW MOON     12  12:10  Venus 3.3°S of Moon    12  13:10  Mars 3.8°S of Moon    13  03     Mars at Aphelion:  1.66596 AU    13  08:02  Regulus 4.9°S of Moon    13  16     Venus 0.5°N of Mars    17  07:01  Spica 6.4°S of Moon    17  13:11  FIRST QUARTER MOON     20  15:06  Antares 4.7°S of Moon    20  16:22  Moon at Descending Node     21  13:30  Moon at Perigee: 364520 km    22  00:21  Venus 1.0°N of Regulus    24  04     Mercury at Perihelion     24  05:37  FULL MOON     24  19:42  Saturn 3.8°N of Moon    26  04:17  Jupiter 4.2°N of Moon    28  06     Delta-Aquarid Meteor Shower    29  17:09  Mars 0.6°N of Regulus    31  16:16  LAST QUARTER MOON Aug 01  17     Mercury at Superior Conjunction     02  08     Saturn at Opposition     02  10:35  Moon at Apogee: 404412 km    03  05:51  Moon at Ascending Node     03  09:18  Aldebaran 5.7°S of Moon    06  22:42  Pollux 3.1°N of Moon    08  16:50  NEW MOON     11  10:00  Venus 4.3°S of Moon    12  22     Perseid Meteor Shower    13  12:31  Spica 6.1°S of Moon    15  18:20  FIRST QUARTER MOON     16  19:04  Moon at Descending Node     16  21:34  Antares 4.5°S of Moon    17  12:23  Moon at Perigee: 369127 km    19  06     Mercury 0.1°S of Mars    20  02     Jupiter at Opposition     21  01:19  Saturn 3.7°N of Moon    22  07:52  Jupiter 4.0°N of Moon    22  15:02  FULL MOON     30  05:22  Moon at Apogee: 404100 km    30  08:13  Moon at Ascending Node     30  10:13  LAST QUARTER MOON Sep 03  07:04  Pollux 3.0°N of Moon    04  07:07  Beehive 2.9°S of Moon    05  17:32  Venus 1.4°N of Spica    06  03     Mercury at Aphelion     07  03:52  NEW MOON     09  19:01  Spica 5.9°S of Moon    10  05:09  Venus 4.1°S of Moon    11  13:05  Moon at Perigee: 368464 km    12  19:35  Moon at Descending Node     13  02:59  Antares 4.2°S of Moon    13  23:39  FIRST QUARTER MOON     14  07     Mercury at Greatest Elong: 26.8°E    14  11     Neptune at Opposition     17  05:37  Saturn 3.8°N of Moon    18  09:50  Jupiter 4.0°N of Moon    21  02:55  FULL MOON     21  05:00  Mercury 1.2°S of Spica    22  22:21  Autumnal Equinox     26  10:33  Moon at Ascending Node     27  00:44  Moon at Apogee: 404641 km    29  04:57  LAST QUARTER MOON     30  15:44  Pollux 2.8°N of MoonOct 01  16:07  Beehive 3.1°S of Moon    03  01     Venus at Aphelion     03  08:12  Regulus 4.9°S of Moon    06  14:05  NEW MOON     08  07     Mars in Conjunction with Sun     08  20:28  Moon at Perigee: 363388 km    09  19     Mercury at Inferior Conjunction     09  21:36  Venus 2.9°S of Moon    09  22:35  Moon at Descending Node     10  09:27  Antares 4.0°S of Moon    13  06:25  FIRST QUARTER MOON     14  10:12  Saturn 3.9°N of Moon    15  12:58  Jupiter 4.1°N of Moon    16  16:24  Venus 1.4°N of Antares    20  03     Mercury at Perihelion     20  17:57  FULL MOON     21  14     Orionid Meteor Shower    23  14:47  Moon at Ascending Node     24  18:30  Moon at Apogee: 405616 km    25  08     Mercury at Greatest Elong: 18.4°W    27  23:40  Pollux 2.6°N of Moon    28  23:05  LAST QUARTER MOON     29  00:32  Beehive 3.3°S of Moon    30  01     Venus at Greatest Elong: 47.0°E    30  17:33  Regulus 5.1°S of MoonNov 02  04:18  Mercury 3.7°N of Spica    03  21:40  Mercury 1.2°S of Moon: Occn.    05  00:15  NEW MOON     05  03     Uranus at Opposition     05  15     S Taurid Meteor Shower    06  01:23  Moon at Perigee: 358845 km    06  06:38  Moon at Descending Node     06  18:29  Antares 3.9°S of Moon    08  08:21  Venus 1.1°S of Moon: Occn.    10  17:27  Saturn 4.1°N of Moon    10  18     Mercury 1.0°N of Mars    11  15:46  FIRST QUARTER MOON     11  20:13  Jupiter 4.4°N of Moon    12  14     N Taurid Meteor Shower    17  21     Leonid Meteor Shower    19  11:58  FULL MOON     19  12:03  Partial Lunar Eclipse; mag=0.974    19  20:59  Moon at Ascending Node     21  05:14  Moon at Apogee: 406276 km    24  06:22  Pollux 2.5°N of Moon    25  07:32  Beehive 3.3°S of Moon    27  01:27  Regulus 5.2°S of Moon    27  15:28  LAST QUARTER MOON     29  08     Mercury at Superior Conjunction Dec 01  01:04  Spica 5.9°S of Moon    03  17:58  Moon at Descending Node     04  10:33  Total Solar Eclipse; mag=1.037    04  10:43  NEW MOON     04  13:01  Moon at Perigee: 356794 km    07  03:48  Venus 1.9°N of Moon    08  04:52  Saturn 4.2°N of Moon    09  09:07  Jupiter 4.5°N of Moon    11  04:36  FIRST QUARTER MOON     14  10     Geminid Meteor Shower    17  03:12  Moon at Ascending Node     18  05:16  Moon at Apogee: 406322 km    19  07:36  FULL MOON     21  12:20  Pollux 2.6°N of Moon    21  18:59  Winter Solstice     22  13:28  Beehive 3.3°S of Moon    22  18     Ursid Meteor Shower    24  07:40  Regulus 5.1°S of Moon    27  05:24  LAST QUARTER MOON     27  12:15  Mars 4.4°N of Antares    28  09:58  Spica 5.8°S of Moon    29  08     Mercury 4.2°S of Venus    31  04:07  Moon at Descending Node     31  16:54  Antares 3.9°S of Moon    31  23:13  Mars 1.0°N of Moon: Occn.    

 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: 2021 to 2030
Europe, Africa, and the Middle East
Below are links to calendars of astronomical events from 2021 to 2030 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    2021     2022     2023     2024     2025     2026     2027     2028     2029     2030 
   CET    2021     2022     2023     2024     2025     2026     2027     2028     2029     2030 
   EET    2021     2022     2023     2024     2025     2026     2027     2028     2029     2030 
   MSK    2021     2022     2023     2024     2025     2026     2027     2028     2029     2030 
   GST    2021     2022     2023     2024     2025     2026     2027     2028     2029     2030 
        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: 

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