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.
|
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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 | |||||
- 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)
- Time Zones Abbreviations
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
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)