2021 Sky Event Almanac

Greenwich Mean Time

The following table gives the date and time of the important astronomical events for the year. The times listed are for Greenwich Mean Time (= Coordinated Universal Time) . This time zone may have different names in different countries. If Daylight Saving Time is in effect, add one hour to the times listed. A key to astronomical terms appears below the almanac.

2021 Sky Event Almanac
Greenwich Mean Time
January - June July - December
Date     GMT   Event
        (h:m)

Jan 02  14     Earth at Perihelion: 0.98325 AU
    02  21:58  Regulus 4.7°S of Moon
    03  15     Quadrantid Meteor Shower
    06  09:37  LAST QUARTER MOON 
    09  15:39  Moon at Perigee: 367390 km
    10  20:14  Moon at Descending Node 
    11  20:12  Venus 1.5°N of Moon
    13  05:00  NEW MOON 
    14  08:15  Mercury 2.3°N of Moon
    20  21:02  FIRST QUARTER MOON 
    21  13:11  Moon at Apogee: 404361 km
    24  02     Mercury at Greatest Elong: 18.6°E
    24  02     Saturn in Conjunction with Sun 
    24  21:47  Moon at Ascending Node 
    27  15:46  Pollux 3.8°N of Moon
    28  19:16  FULL MOON 
    29  01     Jupiter in Conjunction with Sun 
    29  02     Mercury at Perihelion 
    30  04:56  Regulus 4.6°S of Moon

Feb 03  19:33  Moon at Perigee: 370127 km
    04  17:37  LAST QUARTER MOON 
    07  00:29  Moon at Descending Node 
    08  14     Mercury at Inferior Conjunction 
    10  11:16  Saturn 3.4°N of Moon
    11  19:06  NEW MOON 
    18  10:22  Moon at Apogee: 404467 km
    18  22:47  Mars 3.7°N of Moon
    19  18:47  FIRST QUARTER MOON 
    20  05     Venus at Aphelion 
    21  01:44  Moon at Ascending Node 
    23  08     Mercury 4.0°N of Saturn
    24  01:10  Pollux 3.7°N of Moon
    26  14:04  Regulus 4.6°S of Moon
    27  08:17  FULL MOON 

Mar 02  05:19  Moon at Perigee: 365422 km
    03  23:36  Mars 2.6°S of Pleiades
    05  05     Mercury 0.3°N of Jupiter
    06  00:56  Moon at Descending Node 
    06  01:30  LAST QUARTER MOON 
    06  11     Mercury at Greatest Elong: 27.3°W
    09  23:02  Saturn 3.7°N of Moon
    10  15:35  Jupiter 4.0°N of Moon
    11  00     Neptune in Conjunction with Sun 
    11  01:02  Mercury 3.7°N of Moon
    13  10:21  NEW MOON 
    14  02     Mercury at Aphelion 
    18  05:04  Moon at Apogee: 405253 km
    19  17:48  Mars 1.9°N of Moon
    20  03:31  Moon at Ascending Node 
    20  09:37  Vernal Equinox 
    21  14:40  FIRST QUARTER MOON 
    23  10:26  Pollux 3.5°N of Moon
    26  00:17  Regulus 4.7°S of Moon
    26  06     Venus at Superior Conjunction 
    28  18:48  FULL MOON 
    30  06:12  Moon at Perigee: 360311 km

Apr 01  20:49  Antares 4.9°S of Moon
    02  02:41  Moon at Descending Node 
    04  10:02  LAST QUARTER MOON 
    06  08:34  Saturn 4.0°N of Moon
    07  07:15  Jupiter 4.4°N of Moon
    12  02:31  NEW MOON 
    14  17:47  Moon at Apogee: 406120 km
    16  05:53  Moon at Ascending Node 
    17  12:09  Mars 0.1°N of Moon: Occn.
    19  02     Mercury at Superior Conjunction 
    19  18:18  Pollux 3.2°N of Moon
    20  06:59  FIRST QUARTER MOON 
    22  12     Lyrid Meteor Shower
    27  01     Mercury at Perihelion 
    27  03:31  FULL MOON 
    27  15:24  Moon at Perigee: 357379 km
    29  06:07  Antares 4.8°S of Moon
    29  09:17  Moon at Descending Node 
    30  21     Uranus in Conjunction with Sun 

May 03  17:02  Saturn 4.2°N of Moon
    03  19:50  LAST QUARTER MOON 
    04  03:03  Mercury 2.1°S of Pleiades
    04  21:00  Jupiter 4.6°N of Moon
    05  01     Eta-Aquarid Meteor Shower
    11  19:00  NEW MOON 
    11  21:54  Moon at Apogee: 406512 km
    13  10:29  Moon at Ascending Node 
    13  17:59  Mercury 2.1°N of Moon
    16  04:47  Mars 1.5°S of Moon
    17  00:39  Pollux 3.1°N of Moon
    17  06     Mercury at Greatest Elong: 22.0°E
    19  19:13  FIRST QUARTER MOON 
    26  01:52  Moon at Perigee: 357310 km
    26  11:14  FULL MOON 
    26  11:19  Total Lunar Eclipse; mag=1.009
    26  16:55  Antares 4.8°S of Moon
    26  19:38  Moon at Descending Node 
    29  03     Mercury 0.4°S of Venus
    31  01:22  Saturn 4.2°N of Moon

Jun 01  08:57  Jupiter 4.6°N of Moon
    02  07:24  LAST QUARTER MOON 
    08  02:27  Moon at Apogee: 406230 km
    09  16:42  Moon at Ascending Node 
    10  10:42  Annular Solar Eclipse; mag=0.943
    10  10:53  NEW MOON 
    11  01     Mercury at Inferior Conjunction 
    12  06:44  Venus 1.5°S of Moon
    12  13     Venus at Perihelion 
    13  06:19  Pollux 3.1°N of Moon
    13  19:52  Mars 2.8°S of Moon
    18  03:54  FIRST QUARTER MOON 
    21  03:32  Summer Solstice 
    23  03:26  Antares 4.8°S of Moon
    23  06:07  Moon at Descending Node 
    23  09:58  Moon at Perigee: 359960 km
    24  18:40  FULL MOON 
    27  09:30  Saturn 4.0°N of Moon
    28  18:38  Jupiter 4.5°N of Moon

Date     GMT   Event
        (h:m)

Jul 01  21:11  LAST QUARTER MOON 
    04  20     Mercury at Greatest Elong: 21.6°W
    05  14:48  Moon at Apogee: 405342 km
    05  23     Earth at Aphelion: 1.01673 AU
    06  22:41  Moon at Ascending Node 
    08  04:38  Mercury 3.7°S of Moon
    10  01:17  NEW MOON 
    12  09:10  Venus 3.3°S of Moon
    12  10:10  Mars 3.8°S of Moon
    13  00     Mars at Aphelion:  1.66596 AU
    13  13     Venus 0.5°N of Mars
    17  10:11  FIRST QUARTER MOON 
    20  12:06  Antares 4.7°S of Moon
    20  13:22  Moon at Descending Node 
    21  10:30  Moon at Perigee: 364520 km
    21  21:21  Venus 1.0°N of Regulus
    24  01     Mercury at Perihelion 
    24  02:37  FULL MOON 
    24  16:42  Saturn 3.8°N of Moon
    26  01:17  Jupiter 4.2°N of Moon
    28  03     Delta-Aquarid Meteor Shower
    29  14:09  Mars 0.6°N of Regulus
    31  13:16  LAST QUARTER MOON 

Aug 01  14     Mercury at Superior Conjunction 
    02  05     Saturn at Opposition 
    02  07:35  Moon at Apogee: 404412 km
    03  02:51  Moon at Ascending Node 
    06  19:42  Pollux 3.1°N of Moon
    08  13:50  NEW MOON 
    10  00:42  Mars 4.3°S of Moon
    11  07:00  Venus 4.3°S of Moon
    12  19     Perseid Meteor Shower
    15  15:20  FIRST QUARTER MOON 
    16  16:04  Moon at Descending Node 
    16  18:34  Antares 4.5°S of Moon
    17  09:23  Moon at Perigee: 369127 km
    19  03     Mercury 0.1°S of Mars
    19  23     Jupiter at Opposition 
    20  22:19  Saturn 3.7°N of Moon
    22  04:52  Jupiter 4.0°N of Moon
    22  12:02  FULL MOON 
    30  02:22  Moon at Apogee: 404100 km
    30  05:13  Moon at Ascending Node 
    30  07:13  LAST QUARTER MOON 

Sep 03  04:04  Pollux 3.0°N of Moon
    05  14:32  Venus 1.4°N of Spica
    06  00     Mercury at Aphelion 
    07  00:52  NEW MOON 
    10  02:09  Venus 4.1°S of Moon
    11  10:05  Moon at Perigee: 368464 km
    12  16:35  Moon at Descending Node 
    12  23:59  Antares 4.2°S of Moon
    13  20:39  FIRST QUARTER MOON 
    14  04     Mercury at Greatest Elong: 26.8°E
    14  08     Neptune at Opposition 
    17  02:37  Saturn 3.8°N of Moon
    18  06:50  Jupiter 4.0°N of Moon
    20  23:55  FULL MOON 
    21  02:00  Mercury 1.2°S of Spica
    22  19:21  Autumnal Equinox 
    26  07:33  Moon at Ascending Node 
    26  21:44  Moon at Apogee: 404641 km
    29  01:57  LAST QUARTER MOON 
    30  12:44  Pollux 2.8°N of Moon

Oct 02  22     Venus at Aphelion 
    06  11:05  NEW MOON 
    08  04     Mars in Conjunction with Sun 
    08  17:28  Moon at Perigee: 363388 km
    09  16     Mercury at Inferior Conjunction 
    09  18:36  Venus 2.9°S of Moon
    09  19:35  Moon at Descending Node 
    10  06:27  Antares 4.0°S of Moon
    13  03:25  FIRST QUARTER MOON 
    14  07:12  Saturn 3.9°N of Moon
    15  09:58  Jupiter 4.1°N of Moon
    16  13:24  Venus 1.4°N of Antares
    20  00     Mercury at Perihelion 
    20  14:57  FULL MOON 
    21  11     Orionid Meteor Shower
    23  05:45  Pleiades 4.5°N of Moon
    23  11:47  Moon at Ascending Node 
    24  15:30  Moon at Apogee: 405616 km
    25  05     Mercury at Greatest Elong: 18.4°W
    27  20:40  Pollux 2.6°N of Moon
    28  20:05  LAST QUARTER MOON 
    29  22     Venus at Greatest Elong: 47.0°E

Nov 02  01:18  Mercury 3.7°N of Spica
    03  18:40  Mercury 1.2°S of Moon: Occn.
    04  21:15  NEW MOON 
    05  00     Uranus at Opposition 
    05  12     S Taurid Meteor Shower
    05  22:23  Moon at Perigee: 358845 km
    06  03:38  Moon at Descending Node 
    06  15:29  Antares 3.9°S of Moon
    08  05:21  Venus 1.1°S of Moon: Occn.
    10  14:27  Saturn 4.1°N of Moon
    11  12:46  FIRST QUARTER MOON 
    11  17:13  Jupiter 4.4°N of Moon
    12  11     N Taurid Meteor Shower
    17  18     Leonid Meteor Shower
    19  08:58  FULL MOON 
    19  09:03  Partial Lunar Eclipse; mag=0.974
    19  12:21  Pleiades 4.5°N of Moon
    19  17:59  Moon at Ascending Node 
    21  02:14  Moon at Apogee: 406276 km
    24  03:22  Pollux 2.5°N of Moon
    27  12:28  LAST QUARTER MOON 
    29  05     Mercury at Superior Conjunction 

Dec 03  00:28  Mars 0.7°S of Moon: Occn.
    03  14:58  Moon at Descending Node 
    04  07:33  Total Solar Eclipse; mag=1.037
    04  07:43  NEW MOON 
    04  10:01  Moon at Perigee: 356794 km
    07  00:48  Venus 1.9°N of Moon
    08  01:52  Saturn 4.2°N of Moon
    09  06:07  Jupiter 4.5°N of Moon
    11  01:36  FIRST QUARTER MOON 
    14  07     Geminid Meteor Shower
    16  18:30  Pleiades 4.5°N of Moon
    17  00:12  Moon at Ascending Node 
    18  02:16  Moon at Apogee: 406322 km
    19  04:36  FULL MOON 
    21  09:20  Pollux 2.6°N of Moon
    21  15:59  Winter Solstice 
    22  15     Ursid Meteor Shower
    27  02:24  LAST QUARTER MOON 
    27  09:15  Mars 4.4°N of Antares
    29  05     Mercury 4.2°S of Venus
    31  01:07  Moon at Descending Node 
    31  13:54  Antares 3.9°S of Moon
    31  20:13  Mars 1.0°N of Moon: Occn.

    

Terms Used in Sky Event Almanac

  • 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

2021 Phases of the Moon

Greenwich Mean Time

The following table gives the date and time of the Moon's phases for the year. The times listed are for Greenwich Mean Time (= Coordinated Universal Time) . This time zone may have different names in different countries. If Daylight Saving Time is in effect, add one hour to the times listed.

2021 Phases of the Moon
Greenwich Mean Time
New Moon First Quarter Full Moon Last Quarter
--- Jan 06 09:37
Jan 13 05:00 Jan 20 21:02 Jan 28 19:16 Feb 04 17:37
Feb 11 19:06 Feb 19 18:47 Feb 27 08:17 Mar 06 01:30
Mar 13 10:21 Mar 21 14:40 Mar 28 18:48 Apr 04 10:02
Apr 12 02:31 Apr 20 06:59 Apr 27 03:31 May 03 19:50
May 11 19:00 May 19 19:13 May 26 11:14 t Jun 02 07:24
Jun 10 10:53 A Jun 18 03:54 Jun 24 18:40 Jul 01 21:11
Jul 10 01:17 Jul 17 10:11 Jul 24 02:37 Jul 31 13:16
Aug 08 13:50 Aug 15 15:20 Aug 22 12:02 Aug 30 07:13
Sep 07 00:52 Sep 13 20:39 Sep 20 23:55 Sep 29 01:57
Oct 06 11:05 Oct 13 03:25 Oct 20 14:57 Oct 28 20:05
Nov 04 21:15 Nov 11 12:46 Nov 19 08:58 p Nov 27 12:28
Dec 04 07:43 T Dec 11 01:36 Dec 19 04:36 Dec 27 02:24

For a collection of images showing the Moon's phases see: Phases of the Moon Photo Gallery.

The Phases of the Moon table also shows when an eclipse takes place. 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 Phases of the Moon table. 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.


Solar Eclipses

The following table contains links to a series of web pages covering the 21st Century. Each one summarizes ten years of solar eclipses. Every eclipse has links to a global visibility map, an interactive Google map, tables, and additional information.

Decade Pages of Solar Eclipses
Decades
2001-2010 2011-2020 2021-2030 2031-2040 2041-2050
2051-2060 2061-2070 2071-2080 2081-2090 2091-2100

Lunar Eclipses

The following table contains links to a series of web pages covering the 21st Century. Each one summarizes ten years of lunar eclipses. Every eclipse has links to an eclipse diagram, a global visibility map, tables, and additional information.

Decade Pages of Lunar Eclipses
Decades
2001-2010 2011-2020 2021-2030 2031-2040 2041-2050
2051-2060 2061-2070 2071-2080 2081-2090 2091-2100


Sky Event Almanacs: 2021 to 2030

Europe, Africa, and the Middle East

Below are links to sky event almanacs from 2021 to 2030 for six time zones
in Europe, Africa, and the Middle East.
Choose a time zone and click on a year to get a sky event almanac for that year.

Sky Event Almanac - Europe, Africa, & Middle East
CVT 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030
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
        • CVT = Cape Verde Time (= UTC - 1 hour)
        • GMT = Greenwich Mean Time (= UTC + 0 hour)
        • CET = Central European Time (= UTC + 1 hour)
        • EET = Eastern European Time (= UTC + 2 hours)
        • MSK = Moscow Time (= UTC + 3 hours)
        • GST = Gulf Standard Time (= UTC + 4 hours)
          (where UTC = Coordinated Universal Time)

A time zone may have a different name in different countries. Note the difference in hours between a given time zone and Coordinated Universal Time to help in identification.

For other years and other time zones, visit: Sky Event Almanacs.

Accuracy of the Sky Event Almanacs

The goal of the Sky Event Almanacs 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 Sky Event Almanacs
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

Fifty Year Almanac of Astronomical Events - 2021 to 2070

book


For more information and sample pages, see Fifty Year Almanac of Astronomical Events - 2021 To 2070.

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:

    "Sky Event Almanacs Courtesy of Fred Espenak, www.AstroPixels.com".


Return to: Sky Event Almanacs

Return to: Planetary Ephemeris Data


Useful External Links

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