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.
|
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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
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 | |||||
- 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)
- 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)