2021 Sky Event Almanac

Hawaiian Standard Time

The following table gives the date and time of the important astronomical events for the year . The times listed are for Hawaiian Standard Time (Coordinated Universal Time − 10 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
Hawaiian Standard Time
January - June July - December
Date     HST   Event
        (h:m)

Jan 02  04     Earth at Perihelion: 0.98325 AU
    02  11:58  Regulus 4.7°S of Moon
    03  05     Quadrantid Meteor Shower
    05  23:37  LAST QUARTER MOON 
    09  05:39  Moon at Perigee: 367390 km
    10  10:14  Moon at Descending Node 
    11  10:12  Venus 1.5°N of Moon
    12  19:00  NEW MOON 
    13  22:15  Mercury 2.3°N of Moon
    20  11:02  FIRST QUARTER MOON 
    21  03:11  Moon at Apogee: 404361 km
    23  16     Mercury at Greatest Elong: 18.6°E
    23  16     Saturn in Conjunction with Sun 
    24  11:47  Moon at Ascending Node 
    27  05:46  Pollux 3.8°N of Moon
    28  09:16  FULL MOON 
    28  15     Jupiter in Conjunction with Sun 
    28  16     Mercury at Perihelion 
    29  18:56  Regulus 4.6°S of Moon

Feb 03  09:33  Moon at Perigee: 370127 km
    04  07:37  LAST QUARTER MOON 
    06  14:29  Moon at Descending Node 
    08  04     Mercury at Inferior Conjunction 
    10  01:16  Saturn 3.4°N of Moon
    11  09:06  NEW MOON 
    18  00:22  Moon at Apogee: 404467 km
    18  12:47  Mars 3.7°N of Moon
    19  08:47  FIRST QUARTER MOON 
    19  19     Venus at Aphelion 
    20  15:44  Moon at Ascending Node 
    22  22     Mercury 4.0°N of Saturn
    23  15:10  Pollux 3.7°N of Moon
    26  04:04  Regulus 4.6°S of Moon
    26  22:17  FULL MOON 

Mar 01  19:19  Moon at Perigee: 365422 km
    03  13:36  Mars 2.6°S of Pleiades
    04  19     Mercury 0.3°N of Jupiter
    05  14:56  Moon at Descending Node 
    05  15:30  LAST QUARTER MOON 
    06  01     Mercury at Greatest Elong: 27.3°W
    09  13:02  Saturn 3.7°N of Moon
    10  05:35  Jupiter 4.0°N of Moon
    10  14     Neptune in Conjunction with Sun 
    10  15:02  Mercury 3.7°N of Moon
    13  00:21  NEW MOON 
    13  16     Mercury at Aphelion 
    17  19:04  Moon at Apogee: 405253 km
    19  07:48  Mars 1.9°N of Moon
    19  17:31  Moon at Ascending Node 
    19  23:37  Vernal Equinox 
    21  04:40  FIRST QUARTER MOON 
    23  00:26  Pollux 3.5°N of Moon
    25  14:17  Regulus 4.7°S of Moon
    25  20     Venus at Superior Conjunction 
    28  08:48  FULL MOON 
    29  20:12  Moon at Perigee: 360311 km

Apr 01  10:49  Antares 4.9°S of Moon
    01  16:41  Moon at Descending Node 
    04  00:02  LAST QUARTER MOON 
    05  22:34  Saturn 4.0°N of Moon
    06  21:15  Jupiter 4.4°N of Moon
    11  16:31  NEW MOON 
    14  07:47  Moon at Apogee: 406120 km
    15  19:53  Moon at Ascending Node 
    17  02:09  Mars 0.1°N of Moon: Occn.
    18  16     Mercury at Superior Conjunction 
    19  08:18  Pollux 3.2°N of Moon
    19  20:59  FIRST QUARTER MOON 
    22  02     Lyrid Meteor Shower
    26  15     Mercury at Perihelion 
    26  17:31  FULL MOON 
    27  05:24  Moon at Perigee: 357379 km
    28  20:07  Antares 4.8°S of Moon
    28  23:17  Moon at Descending Node 
    30  11     Uranus in Conjunction with Sun 

May 03  07:02  Saturn 4.2°N of Moon
    03  09:50  LAST QUARTER MOON 
    03  17:03  Mercury 2.1°S of Pleiades
    04  11:00  Jupiter 4.6°N of Moon
    04  15     Eta-Aquarid Meteor Shower
    11  09:00  NEW MOON 
    11  11:54  Moon at Apogee: 406512 km
    13  00:29  Moon at Ascending Node 
    13  07:59  Mercury 2.1°N of Moon
    15  18:47  Mars 1.5°S of Moon
    16  14:39  Pollux 3.1°N of Moon
    16  20     Mercury at Greatest Elong: 22.0°E
    19  09:13  FIRST QUARTER MOON 
    25  15:52  Moon at Perigee: 357310 km
    26  01:14  FULL MOON 
    26  01:19  Total Lunar Eclipse; mag=1.009
    26  06:55  Antares 4.8°S of Moon
    26  09:38  Moon at Descending Node 
    28  17     Mercury 0.4°S of Venus
    30  15:22  Saturn 4.2°N of Moon
    31  22:57  Jupiter 4.6°N of Moon

Jun 01  21:24  LAST QUARTER MOON 
    07  16:27  Moon at Apogee: 406230 km
    09  06:42  Moon at Ascending Node 
    10  00:42  Annular Solar Eclipse; mag=0.943
    10  00:53  NEW MOON 
    10  15     Mercury at Inferior Conjunction 
    11  20:44  Venus 1.5°S of Moon
    12  03     Venus at Perihelion 
    12  20:19  Pollux 3.1°N of Moon
    13  09:52  Mars 2.8°S of Moon
    17  17:54  FIRST QUARTER MOON 
    20  17:32  Summer Solstice 
    22  17:26  Antares 4.8°S of Moon
    22  20:07  Moon at Descending Node 
    22  23:58  Moon at Perigee: 359960 km
    24  08:40  FULL MOON 
    26  23:30  Saturn 4.0°N of Moon
    28  08:38  Jupiter 4.5°N of Moon

Date     HST   Event
        (h:m)

Jul 01  11:11  LAST QUARTER MOON 
    04  10     Mercury at Greatest Elong: 21.6°W
    05  04:48  Moon at Apogee: 405342 km
    05  13     Earth at Aphelion: 1.01673 AU
    06  12:41  Moon at Ascending Node 
    07  18:38  Mercury 3.7°S of Moon
    09  15:17  NEW MOON 
    11  23:10  Venus 3.3°S of Moon
    12  00:10  Mars 3.8°S of Moon
    12  14     Mars at Aphelion:  1.66596 AU
    13  03     Venus 0.5°N of Mars
    17  00:11  FIRST QUARTER MOON 
    20  02:06  Antares 4.7°S of Moon
    20  03:22  Moon at Descending Node 
    21  00:30  Moon at Perigee: 364520 km
    21  11:21  Venus 1.0°N of Regulus
    23  15     Mercury at Perihelion 
    23  16:37  FULL MOON 
    24  06:42  Saturn 3.8°N of Moon
    25  15:17  Jupiter 4.2°N of Moon
    27  17     Delta-Aquarid Meteor Shower
    29  04:09  Mars 0.6°N of Regulus
    31  03:16  LAST QUARTER MOON 

Aug 01  04     Mercury at Superior Conjunction 
    01  19     Saturn at Opposition 
    01  21:35  Moon at Apogee: 404412 km
    02  16:51  Moon at Ascending Node 
    06  09:42  Pollux 3.1°N of Moon
    08  03:50  NEW MOON 
    09  14:42  Mars 4.3°S of Moon
    10  21:00  Venus 4.3°S of Moon
    12  09     Perseid Meteor Shower
    15  05:20  FIRST QUARTER MOON 
    16  06:04  Moon at Descending Node 
    16  08:34  Antares 4.5°S of Moon
    16  23:23  Moon at Perigee: 369127 km
    18  17     Mercury 0.1°S of Mars
    19  13     Jupiter at Opposition 
    20  12:19  Saturn 3.7°N of Moon
    21  18:52  Jupiter 4.0°N of Moon
    22  02:02  FULL MOON 
    29  16:22  Moon at Apogee: 404100 km
    29  19:13  Moon at Ascending Node 
    29  21:13  LAST QUARTER MOON 

Sep 02  18:04  Pollux 3.0°N of Moon
    05  04:32  Venus 1.4°N of Spica
    05  14     Mercury at Aphelion 
    06  14:52  NEW MOON 
    09  16:09  Venus 4.1°S of Moon
    11  00:05  Moon at Perigee: 368464 km
    12  06:35  Moon at Descending Node 
    12  13:59  Antares 4.2°S of Moon
    13  10:39  FIRST QUARTER MOON 
    13  18     Mercury at Greatest Elong: 26.8°E
    13  22     Neptune at Opposition 
    16  16:37  Saturn 3.8°N of Moon
    17  20:50  Jupiter 4.0°N of Moon
    20  13:55  FULL MOON 
    20  16:00  Mercury 1.2°S of Spica
    22  09:21  Autumnal Equinox 
    25  21:33  Moon at Ascending Node 
    26  11:44  Moon at Apogee: 404641 km
    28  15:57  LAST QUARTER MOON 
    30  02:44  Pollux 2.8°N of Moon

Oct 02  12     Venus at Aphelion 
    06  01:05  NEW MOON 
    07  18     Mars in Conjunction with Sun 
    08  07:28  Moon at Perigee: 363388 km
    09  06     Mercury at Inferior Conjunction 
    09  08:36  Venus 2.9°S of Moon
    09  09:35  Moon at Descending Node 
    09  20:27  Antares 4.0°S of Moon
    12  17:25  FIRST QUARTER MOON 
    13  21:12  Saturn 3.9°N of Moon
    14  23:58  Jupiter 4.1°N of Moon
    16  03:24  Venus 1.4°N of Antares
    19  14     Mercury at Perihelion 
    20  04:57  FULL MOON 
    21  01     Orionid Meteor Shower
    22  19:45  Pleiades 4.5°N of Moon
    23  01:47  Moon at Ascending Node 
    24  05:30  Moon at Apogee: 405616 km
    24  19     Mercury at Greatest Elong: 18.4°W
    27  10:40  Pollux 2.6°N of Moon
    28  10:05  LAST QUARTER MOON 
    29  12     Venus at Greatest Elong: 47.0°E

Nov 01  15:18  Mercury 3.7°N of Spica
    03  08:40  Mercury 1.2°S of Moon: Occn.
    04  11:15  NEW MOON 
    04  14     Uranus at Opposition 
    05  02     S Taurid Meteor Shower
    05  12:23  Moon at Perigee: 358845 km
    05  17:38  Moon at Descending Node 
    06  05:29  Antares 3.9°S of Moon
    07  19:21  Venus 1.1°S of Moon: Occn.
    10  04:27  Saturn 4.1°N of Moon
    11  02:46  FIRST QUARTER MOON 
    11  07:13  Jupiter 4.4°N of Moon
    12  01     N Taurid Meteor Shower
    17  08     Leonid Meteor Shower
    18  22:58  FULL MOON 
    18  23:03  Partial Lunar Eclipse; mag=0.974
    19  02:21  Pleiades 4.5°N of Moon
    19  07:59  Moon at Ascending Node 
    20  16:14  Moon at Apogee: 406276 km
    23  17:22  Pollux 2.5°N of Moon
    27  02:28  LAST QUARTER MOON 
    28  19     Mercury at Superior Conjunction 

Dec 02  14:28  Mars 0.7°S of Moon: Occn.
    03  04:58  Moon at Descending Node 
    03  21:33  Total Solar Eclipse; mag=1.037
    03  21:43  NEW MOON 
    04  00:01  Moon at Perigee: 356794 km
    06  14:48  Venus 1.9°N of Moon
    07  15:52  Saturn 4.2°N of Moon
    08  20:07  Jupiter 4.5°N of Moon
    10  15:36  FIRST QUARTER MOON 
    13  21     Geminid Meteor Shower
    16  08:30  Pleiades 4.5°N of Moon
    16  14:12  Moon at Ascending Node 
    17  16:16  Moon at Apogee: 406322 km
    18  18:36  FULL MOON 
    20  23:20  Pollux 2.6°N of Moon
    21  05:59  Winter Solstice 
    22  05     Ursid Meteor Shower
    26  16:24  LAST QUARTER MOON 
    26  23:15  Mars 4.4°N of Antares
    28  19     Mercury 4.2°S of Venus
    30  15:07  Moon at Descending Node 
    31  03:54  Antares 3.9°S of Moon
    31  10:13  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

Hawaiian Standard Time

The following table gives the date and time of the Moon's phases for the year . The times listed are for Hawaiian Standard Time (Coordinated Universal Time − 10 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
Hawaiian Standard Time
New Moon First Quarter Full Moon Last Quarter
--- Jan 05 23:37
Jan 12 19:00 Jan 20 11:02 Jan 28 09:16 Feb 04 07:37
Feb 11 09:06 Feb 19 08:47 Feb 26 22:17 Mar 05 15:30
Mar 13 00:21 Mar 21 04:40 Mar 28 08:48 Apr 04 00:02
Apr 11 16:31 Apr 19 20:59 Apr 26 17:31 May 03 09:50
May 11 09:00 May 19 09:13 May 26 01:14 t Jun 01 21:24
Jun 10 00:53 A Jun 17 17:54 Jun 24 08:40 Jul 01 11:11
Jul 09 15:17 Jul 17 00:11 Jul 23 16:37 Jul 31 03:16
Aug 08 03:50 Aug 15 05:20 Aug 22 02:02 Aug 29 21:13
Sep 06 14:52 Sep 13 10:39 Sep 20 13:55 Sep 28 15:57
Oct 06 01:05 Oct 12 17:25 Oct 20 04:57 Oct 28 10:05
Nov 04 11:15 Nov 11 02:46 Nov 18 22:58 p Nov 27 02:28
Dec 03 21:43 T Dec 10 15:36 Dec 18 18:36 Dec 26 16:24

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

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