2021 Sky Event Almanac

Atlantic Standard Time

The following table gives the date and time of the important astronomical events for the year. The times listed are for Atlantic Standard Time (Coordinated Universal Time − 4 hours) . 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
Atlantic Standard Time
January - June July - December
Date     AST   Event
        (h:m)

Jan 02  10     Earth at Perihelion: 0.98325 AU
    02  17:58  Regulus 4.7°S of Moon
    03  11     Quadrantid Meteor Shower
    06  05:37  LAST QUARTER MOON 
    09  11:39  Moon at Perigee: 367390 km
    10  16:14  Moon at Descending Node 
    11  16:12  Venus 1.5°N of Moon
    13  01:00  NEW MOON 
    14  04:15  Mercury 2.3°N of Moon
    20  17:02  FIRST QUARTER MOON 
    21  09:11  Moon at Apogee: 404361 km
    23  22     Mercury at Greatest Elong: 18.6°E
    23  22     Saturn in Conjunction with Sun 
    24  17:47  Moon at Ascending Node 
    27  11:46  Pollux 3.8°N of Moon
    28  15:16  FULL MOON 
    28  21     Jupiter in Conjunction with Sun 
    28  22     Mercury at Perihelion 
    30  00:56  Regulus 4.6°S of Moon

Feb 03  15:33  Moon at Perigee: 370127 km
    04  13:37  LAST QUARTER MOON 
    06  20:29  Moon at Descending Node 
    08  10     Mercury at Inferior Conjunction 
    10  07:16  Saturn 3.4°N of Moon
    11  15:06  NEW MOON 
    18  06:22  Moon at Apogee: 404467 km
    18  18:47  Mars 3.7°N of Moon
    19  14:47  FIRST QUARTER MOON 
    20  01     Venus at Aphelion 
    20  21:44  Moon at Ascending Node 
    23  04     Mercury 4.0°N of Saturn
    23  21:10  Pollux 3.7°N of Moon
    26  10:04  Regulus 4.6°S of Moon
    27  04:17  FULL MOON 

Mar 02  01:19  Moon at Perigee: 365422 km
    03  19:36  Mars 2.6°S of Pleiades
    05  01     Mercury 0.3°N of Jupiter
    05  20:56  Moon at Descending Node 
    05  21:30  LAST QUARTER MOON 
    06  07     Mercury at Greatest Elong: 27.3°W
    09  19:02  Saturn 3.7°N of Moon
    10  11:35  Jupiter 4.0°N of Moon
    10  20     Neptune in Conjunction with Sun 
    10  21:02  Mercury 3.7°N of Moon
    13  06:21  NEW MOON 
    13  22     Mercury at Aphelion 
    18  01:04  Moon at Apogee: 405253 km
    19  13:48  Mars 1.9°N of Moon
    19  23:31  Moon at Ascending Node 
    20  05:37  Vernal Equinox 
    21  10:40  FIRST QUARTER MOON 
    23  06:26  Pollux 3.5°N of Moon
    25  20:17  Regulus 4.7°S of Moon
    26  02     Venus at Superior Conjunction 
    28  14:48  FULL MOON 
    30  02:12  Moon at Perigee: 360311 km

Apr 01  16:49  Antares 4.9°S of Moon
    01  22:41  Moon at Descending Node 
    04  06:02  LAST QUARTER MOON 
    06  04:34  Saturn 4.0°N of Moon
    07  03:15  Jupiter 4.4°N of Moon
    11  22:31  NEW MOON 
    14  13:47  Moon at Apogee: 406120 km
    16  01:53  Moon at Ascending Node 
    17  08:09  Mars 0.1°N of Moon: Occn.
    18  22     Mercury at Superior Conjunction 
    19  14:18  Pollux 3.2°N of Moon
    20  02:59  FIRST QUARTER MOON 
    22  08     Lyrid Meteor Shower
    26  21     Mercury at Perihelion 
    26  23:31  FULL MOON 
    27  11:24  Moon at Perigee: 357379 km
    29  02:07  Antares 4.8°S of Moon
    29  05:17  Moon at Descending Node 
    30  17     Uranus in Conjunction with Sun 

May 03  13:02  Saturn 4.2°N of Moon
    03  15:50  LAST QUARTER MOON 
    03  23:03  Mercury 2.1°S of Pleiades
    04  17:00  Jupiter 4.6°N of Moon
    04  21     Eta-Aquarid Meteor Shower
    11  15:00  NEW MOON 
    11  17:54  Moon at Apogee: 406512 km
    13  06:29  Moon at Ascending Node 
    13  13:59  Mercury 2.1°N of Moon
    16  00:47  Mars 1.5°S of Moon
    16  20:39  Pollux 3.1°N of Moon
    17  02     Mercury at Greatest Elong: 22.0°E
    19  15:13  FIRST QUARTER MOON 
    25  21:52  Moon at Perigee: 357310 km
    26  07:14  FULL MOON 
    26  07:19  Total Lunar Eclipse; mag=1.009
    26  12:55  Antares 4.8°S of Moon
    26  15:38  Moon at Descending Node 
    28  23     Mercury 0.4°S of Venus
    30  21:22  Saturn 4.2°N of Moon

Jun 01  04:57  Jupiter 4.6°N of Moon
    02  03:24  LAST QUARTER MOON 
    07  22:27  Moon at Apogee: 406230 km
    09  12:42  Moon at Ascending Node 
    10  06:42  Annular Solar Eclipse; mag=0.943
    10  06:53  NEW MOON 
    10  21     Mercury at Inferior Conjunction 
    12  02:44  Venus 1.5°S of Moon
    12  09     Venus at Perihelion 
    13  02:19  Pollux 3.1°N of Moon
    13  15:52  Mars 2.8°S of Moon
    17  23:54  FIRST QUARTER MOON 
    20  23:32  Summer Solstice 
    22  23:26  Antares 4.8°S of Moon
    23  02:07  Moon at Descending Node 
    23  05:58  Moon at Perigee: 359960 km
    24  14:40  FULL MOON 
    27  05:30  Saturn 4.0°N of Moon
    28  14:38  Jupiter 4.5°N of Moon

Date     AST   Event
        (h:m)

Jul 01  17:11  LAST QUARTER MOON 
    04  16     Mercury at Greatest Elong: 21.6°W
    05  10:48  Moon at Apogee: 405342 km
    05  19     Earth at Aphelion: 1.01673 AU
    06  18:41  Moon at Ascending Node 
    08  00:38  Mercury 3.7°S of Moon
    09  21:17  NEW MOON 
    12  05:10  Venus 3.3°S of Moon
    12  06:10  Mars 3.8°S of Moon
    12  20     Mars at Aphelion:  1.66596 AU
    13  09     Venus 0.5°N of Mars
    17  06:11  FIRST QUARTER MOON 
    20  08:06  Antares 4.7°S of Moon
    20  09:22  Moon at Descending Node 
    21  06:30  Moon at Perigee: 364520 km
    21  17:21  Venus 1.0°N of Regulus
    23  21     Mercury at Perihelion 
    23  22:37  FULL MOON 
    24  12:42  Saturn 3.8°N of Moon
    25  21:17  Jupiter 4.2°N of Moon
    27  23     Delta-Aquarid Meteor Shower
    29  10:09  Mars 0.6°N of Regulus
    31  09:16  LAST QUARTER MOON 

Aug 01  10     Mercury at Superior Conjunction 
    02  01     Saturn at Opposition 
    02  03:35  Moon at Apogee: 404412 km
    02  22:51  Moon at Ascending Node 
    06  15:42  Pollux 3.1°N of Moon
    08  09:50  NEW MOON 
    09  20:42  Mars 4.3°S of Moon
    11  03:00  Venus 4.3°S of Moon
    12  15     Perseid Meteor Shower
    15  11:20  FIRST QUARTER MOON 
    16  12:04  Moon at Descending Node 
    16  14:34  Antares 4.5°S of Moon
    17  05:23  Moon at Perigee: 369127 km
    18  23     Mercury 0.1°S of Mars
    19  19     Jupiter at Opposition 
    20  18:19  Saturn 3.7°N of Moon
    22  00:52  Jupiter 4.0°N of Moon
    22  08:02  FULL MOON 
    29  22:22  Moon at Apogee: 404100 km
    30  01:13  Moon at Ascending Node 
    30  03:13  LAST QUARTER MOON 

Sep 03  00:04  Pollux 3.0°N of Moon
    05  10:32  Venus 1.4°N of Spica
    05  20     Mercury at Aphelion 
    06  20:52  NEW MOON 
    09  22:09  Venus 4.1°S of Moon
    11  06:05  Moon at Perigee: 368464 km
    12  12:35  Moon at Descending Node 
    12  19:59  Antares 4.2°S of Moon
    13  16:39  FIRST QUARTER MOON 
    14  00     Mercury at Greatest Elong: 26.8°E
    14  04     Neptune at Opposition 
    16  22:37  Saturn 3.8°N of Moon
    18  02:50  Jupiter 4.0°N of Moon
    20  19:55  FULL MOON 
    20  22:00  Mercury 1.2°S of Spica
    22  15:21  Autumnal Equinox 
    26  03:33  Moon at Ascending Node 
    26  17:44  Moon at Apogee: 404641 km
    28  21:57  LAST QUARTER MOON 
    30  08:44  Pollux 2.8°N of Moon

Oct 02  18     Venus at Aphelion 
    06  07:05  NEW MOON 
    08  00     Mars in Conjunction with Sun 
    08  13:28  Moon at Perigee: 363388 km
    09  12     Mercury at Inferior Conjunction 
    09  14:36  Venus 2.9°S of Moon
    09  15:35  Moon at Descending Node 
    10  02:27  Antares 4.0°S of Moon
    12  23:25  FIRST QUARTER MOON 
    14  03:12  Saturn 3.9°N of Moon
    15  05:58  Jupiter 4.1°N of Moon
    16  09:24  Venus 1.4°N of Antares
    19  20     Mercury at Perihelion 
    20  10:57  FULL MOON 
    21  07     Orionid Meteor Shower
    23  01:45  Pleiades 4.5°N of Moon
    23  07:47  Moon at Ascending Node 
    24  11:30  Moon at Apogee: 405616 km
    25  01     Mercury at Greatest Elong: 18.4°W
    27  16:40  Pollux 2.6°N of Moon
    28  16:05  LAST QUARTER MOON 
    29  18     Venus at Greatest Elong: 47.0°E

Nov 01  21:18  Mercury 3.7°N of Spica
    03  14:40  Mercury 1.2°S of Moon: Occn.
    04  17:15  NEW MOON 
    04  20     Uranus at Opposition 
    05  08     S Taurid Meteor Shower
    05  18:23  Moon at Perigee: 358845 km
    05  23:38  Moon at Descending Node 
    06  11:29  Antares 3.9°S of Moon
    08  01:21  Venus 1.1°S of Moon: Occn.
    10  10:27  Saturn 4.1°N of Moon
    11  08:46  FIRST QUARTER MOON 
    11  13:13  Jupiter 4.4°N of Moon
    12  07     N Taurid Meteor Shower
    17  14     Leonid Meteor Shower
    19  04:58  FULL MOON 
    19  05:03  Partial Lunar Eclipse; mag=0.974
    19  08:21  Pleiades 4.5°N of Moon
    19  13:59  Moon at Ascending Node 
    20  22:14  Moon at Apogee: 406276 km
    23  23:22  Pollux 2.5°N of Moon
    27  08:28  LAST QUARTER MOON 
    29  01     Mercury at Superior Conjunction 

Dec 02  20:28  Mars 0.7°S of Moon: Occn.
    03  10:58  Moon at Descending Node 
    04  03:33  Total Solar Eclipse; mag=1.037
    04  03:43  NEW MOON 
    04  06:01  Moon at Perigee: 356794 km
    06  20:48  Venus 1.9°N of Moon
    07  21:52  Saturn 4.2°N of Moon
    09  02:07  Jupiter 4.5°N of Moon
    10  21:36  FIRST QUARTER MOON 
    14  03     Geminid Meteor Shower
    16  14:30  Pleiades 4.5°N of Moon
    16  20:12  Moon at Ascending Node 
    17  22:16  Moon at Apogee: 406322 km
    19  00:36  FULL MOON 
    21  05:20  Pollux 2.6°N of Moon
    21  11:59  Winter Solstice 
    22  11     Ursid Meteor Shower
    26  22:24  LAST QUARTER MOON 
    27  05:15  Mars 4.4°N of Antares
    29  01     Mercury 4.2°S of Venus
    30  21:07  Moon at Descending Node 
    31  09:54  Antares 3.9°S of Moon
    31  16:13  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

Atlantic Standard Time

The following table gives the date and time of the Moon's phases for the year. The times listed are for Atlantic Standard Time (Coordinated Universal Time − 4 hours) . 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
Atlantic Standard Time
New Moon First Quarter Full Moon Last Quarter
--- Jan 06 05:37
Jan 13 01:00 Jan 20 17:02 Jan 28 15:16 Feb 04 13:37
Feb 11 15:06 Feb 19 14:47 Feb 27 04:17 Mar 05 21:30
Mar 13 06:21 Mar 21 10:40 Mar 28 14:48 Apr 04 06:02
Apr 11 22:31 Apr 20 02:59 Apr 26 23:31 May 03 15:50
May 11 15:00 May 19 15:13 May 26 07:14 t Jun 02 03:24
Jun 10 06:53 A Jun 17 23:54 Jun 24 14:40 Jul 01 17:11
Jul 09 21:17 Jul 17 06:11 Jul 23 22:37 Jul 31 09:16
Aug 08 09:50 Aug 15 11:20 Aug 22 08:02 Aug 30 03:13
Sep 06 20:52 Sep 13 16:39 Sep 20 19:55 Sep 28 21:57
Oct 06 07:05 Oct 12 23:25 Oct 20 10:57 Oct 28 16:05
Nov 04 17:15 Nov 11 08:46 Nov 19 04:58 p Nov 27 08:28
Dec 04 03:43 T Dec 10 21:36 Dec 19 00:36 Dec 26 22:24

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

The Americas

Below are links to sky event almanacs from 2021 to 2030 for eight time zones in the Americas.
Choose a time zone and click on a year to get a sky event almanac for that year.

Sky Event Almanacs - The Americas
ART 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030
AST 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030
EST 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030
CST 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030
MST 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030
PST 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030
AKST 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030
HST 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030

        Time Zones Abbreviations
        • ART = Argentina Time (= UTC - 3 hours)
        • AST = Atlantic Standard Time (= UTC - 4 hours)
        • EST = Eastern Standard Time (= UTC - 5 hours)
        • CST = Central Standard Time (= UTC - 6 hours)
        • MST = Mountain Standard Time (= UTC - 7 hours)
        • PST = Pacific Standard Time (= UTC - 8 hours)
        • AKST = Alaskan Standard Time (= UTC - 9 hours)
        • HST = Hawaiian Standard Time (= UTC - 10 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

Interactive Sky Chart (Sky and Telescope)
Sky Maps (sky-map.org)
Astronomical Almanac (Sky and Telescope)
Weather Forecast for Astronomy (Clear Outside)
GOES-East Images (NOAA-GOES)
Astronomy Tools (Astronomy Tools)