2021 Sky Event Almanac
Alaska Standard Time
The following table gives the date and time of the important astronomical events for the year . The times listed are for Alaska Standard Time (Coordinated Universal Time − 9 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 | ||||||||
| Alaska Standard Time | ||||||||
| January - June | July - December | |||||||
Date AKST Even
(h:m)
Jan 02 05 Earth at Perihelion: 0.98325 AU
02 12:58 Regulus 4.7°S of Moon
03 06 Quadrantid Meteor Shower
06 00:37 LAST QUARTER MOON
09 06:39 Moon at Perigee: 367390 km
10 11:14 Moon at Descending Node
11 11:12 Venus 1.5°N of Moon
12 20:00 NEW MOON
13 23:15 Mercury 2.3°N of Moon
20 12:02 FIRST QUARTER MOON
21 04:11 Moon at Apogee: 404361 km
23 17 Mercury at Greatest Elong: 18.6°E
23 17 Saturn in Conjunction with Sun
24 12:47 Moon at Ascending Node
27 06:46 Pollux 3.8°N of Moon
28 10:16 FULL MOON
28 16 Jupiter in Conjunction with Sun
28 17 Mercury at Perihelion
29 19:56 Regulus 4.6°S of Moon
Feb 03 10:33 Moon at Perigee: 370127 km
04 08:37 LAST QUARTER MOON
06 15:29 Moon at Descending Node
08 05 Mercury at Inferior Conjunction
10 02:16 Saturn 3.4°N of Moon
11 10:06 NEW MOON
18 01:22 Moon at Apogee: 404467 km
18 13:47 Mars 3.7°N of Moon
19 09:47 FIRST QUARTER MOON
19 20 Venus at Aphelion
20 16:44 Moon at Ascending Node
22 23 Mercury 4.0°N of Saturn
23 16:10 Pollux 3.7°N of Moon
26 05:04 Regulus 4.6°S of Moon
26 23:17 FULL MOON
Mar 01 20:19 Moon at Perigee: 365422 km
03 14:36 Mars 2.6°S of Pleiades
04 20 Mercury 0.3°N of Jupiter
05 15:56 Moon at Descending Node
05 16:30 LAST QUARTER MOON
06 02 Mercury at Greatest Elong: 27.3°W
09 14:02 Saturn 3.7°N of Moon
10 06:35 Jupiter 4.0°N of Moon
10 15 Neptune in Conjunction with Sun
10 16:02 Mercury 3.7°N of Moon
13 01:21 NEW MOON
13 17 Mercury at Aphelion
17 20:04 Moon at Apogee: 405253 km
19 08:48 Mars 1.9°N of Moon
19 18:31 Moon at Ascending Node
20 00:37 Vernal Equinox
21 05:40 FIRST QUARTER MOON
23 01:26 Pollux 3.5°N of Moon
25 15:17 Regulus 4.7°S of Moon
25 21 Venus at Superior Conjunction
28 09:48 FULL MOON
29 21:12 Moon at Perigee: 360311 km
Apr 01 11:49 Antares 4.9°S of Moon
01 17:41 Moon at Descending Node
04 01:02 LAST QUARTER MOON
05 23:34 Saturn 4.0°N of Moon
06 22:15 Jupiter 4.4°N of Moon
11 17:31 NEW MOON
14 08:47 Moon at Apogee: 406120 km
15 20:53 Moon at Ascending Node
17 03:09 Mars 0.1°N of Moon: Occn.
18 17 Mercury at Superior Conjunction
19 09:18 Pollux 3.2°N of Moon
19 21:59 FIRST QUARTER MOON
22 03 Lyrid Meteor Shower
26 16 Mercury at Perihelion
26 18:31 FULL MOON
27 06:24 Moon at Perigee: 357379 km
28 21:07 Antares 4.8°S of Moon
29 00:17 Moon at Descending Node
30 12 Uranus in Conjunction with Sun
May 03 08:02 Saturn 4.2°N of Moon
03 10:50 LAST QUARTER MOON
03 18:03 Mercury 2.1°S of Pleiades
04 12:00 Jupiter 4.6°N of Moon
04 16 Eta-Aquarid Meteor Shower
11 10:00 NEW MOON
11 12:54 Moon at Apogee: 406512 km
13 01:29 Moon at Ascending Node
13 08:59 Mercury 2.1°N of Moon
15 19:47 Mars 1.5°S of Moon
16 15:39 Pollux 3.1°N of Moon
16 21 Mercury at Greatest Elong: 22.0°E
19 10:13 FIRST QUARTER MOON
25 16:52 Moon at Perigee: 357310 km
26 02:14 FULL MOON
26 02:19 Total Lunar Eclipse; mag=1.009
26 07:55 Antares 4.8°S of Moon
26 10:38 Moon at Descending Node
28 18 Mercury 0.4°S of Venus
30 16:22 Saturn 4.2°N of Moon
31 23:57 Jupiter 4.6°N of Moon
Jun 01 22:24 LAST QUARTER MOON
07 17:27 Moon at Apogee: 406230 km
09 07:42 Moon at Ascending Node
10 01:42 Annular Solar Eclipse; mag=0.943
10 01:53 NEW MOON
10 16 Mercury at Inferior Conjunction
11 21:44 Venus 1.5°S of Moon
12 04 Venus at Perihelion
12 21:19 Pollux 3.1°N of Moon
13 10:52 Mars 2.8°S of Moon
17 18:54 FIRST QUARTER MOON
20 18:32 Summer Solstice
22 18:26 Antares 4.8°S of Moon
22 21:07 Moon at Descending Node
23 00:58 Moon at Perigee: 359960 km
24 09:40 FULL MOON
27 00:30 Saturn 4.0°N of Moon
28 09:38 Jupiter 4.5°N of Moon
|
Date AKST Even
(h:m)
Jul 01 12:11 LAST QUARTER MOON
04 11 Mercury at Greatest Elong: 21.6°W
05 05:48 Moon at Apogee: 405342 km
05 14 Earth at Aphelion: 1.01673 AU
06 13:41 Moon at Ascending Node
07 19:38 Mercury 3.7°S of Moon
09 16:17 NEW MOON
12 00:10 Venus 3.3°S of Moon
12 01:10 Mars 3.8°S of Moon
12 15 Mars at Aphelion: 1.66596 AU
13 04 Venus 0.5°N of Mars
17 01:11 FIRST QUARTER MOON
20 03:06 Antares 4.7°S of Moon
20 04:22 Moon at Descending Node
21 01:30 Moon at Perigee: 364520 km
21 12:21 Venus 1.0°N of Regulus
23 16 Mercury at Perihelion
23 17:37 FULL MOON
24 07:42 Saturn 3.8°N of Moon
25 16:17 Jupiter 4.2°N of Moon
27 18 Delta-Aquarid Meteor Shower
29 05:09 Mars 0.6°N of Regulus
31 04:16 LAST QUARTER MOON
Aug 01 05 Mercury at Superior Conjunction
01 20 Saturn at Opposition
01 22:35 Moon at Apogee: 404412 km
02 17:51 Moon at Ascending Node
06 10:42 Pollux 3.1°N of Moon
08 04:50 NEW MOON
09 15:42 Mars 4.3°S of Moon
10 22:00 Venus 4.3°S of Moon
12 10 Perseid Meteor Shower
15 06:20 FIRST QUARTER MOON
16 07:04 Moon at Descending Node
16 09:34 Antares 4.5°S of Moon
17 00:23 Moon at Perigee: 369127 km
18 18 Mercury 0.1°S of Mars
19 14 Jupiter at Opposition
20 13:19 Saturn 3.7°N of Moon
21 19:52 Jupiter 4.0°N of Moon
22 03:02 FULL MOON
29 17:22 Moon at Apogee: 404100 km
29 20:13 Moon at Ascending Node
29 22:13 LAST QUARTER MOON
Sep 02 19:04 Pollux 3.0°N of Moon
05 05:32 Venus 1.4°N of Spica
05 15 Mercury at Aphelion
06 15:52 NEW MOON
09 17:09 Venus 4.1°S of Moon
11 01:05 Moon at Perigee: 368464 km
12 07:35 Moon at Descending Node
12 14:59 Antares 4.2°S of Moon
13 11:39 FIRST QUARTER MOON
13 19 Mercury at Greatest Elong: 26.8°E
13 23 Neptune at Opposition
16 17:37 Saturn 3.8°N of Moon
17 21:50 Jupiter 4.0°N of Moon
20 14:55 FULL MOON
20 17:00 Mercury 1.2°S of Spica
22 10:21 Autumnal Equinox
25 22:33 Moon at Ascending Node
26 12:44 Moon at Apogee: 404641 km
28 16:57 LAST QUARTER MOON
30 03:44 Pollux 2.8°N of Moon
Oct 02 13 Venus at Aphelion
06 02:05 NEW MOON
07 19 Mars in Conjunction with Sun
08 08:28 Moon at Perigee: 363388 km
09 07 Mercury at Inferior Conjunction
09 09:36 Venus 2.9°S of Moon
09 10:35 Moon at Descending Node
09 21:27 Antares 4.0°S of Moon
12 18:25 FIRST QUARTER MOON
13 22:12 Saturn 3.9°N of Moon
15 00:58 Jupiter 4.1°N of Moon
16 04:24 Venus 1.4°N of Antares
19 15 Mercury at Perihelion
20 05:57 FULL MOON
21 02 Orionid Meteor Shower
22 20:45 Pleiades 4.5°N of Moon
23 02:47 Moon at Ascending Node
24 06:30 Moon at Apogee: 405616 km
24 20 Mercury at Greatest Elong: 18.4°W
27 11:40 Pollux 2.6°N of Moon
28 11:05 LAST QUARTER MOON
29 13 Venus at Greatest Elong: 47.0°E
Nov 01 16:18 Mercury 3.7°N of Spica
03 09:40 Mercury 1.2°S of Moon: Occn.
04 12:15 NEW MOON
04 15 Uranus at Opposition
05 03 S Taurid Meteor Shower
05 13:23 Moon at Perigee: 358845 km
05 18:38 Moon at Descending Node
06 06:29 Antares 3.9°S of Moon
07 20:21 Venus 1.1°S of Moon: Occn.
10 05:27 Saturn 4.1°N of Moon
11 03:46 FIRST QUARTER MOON
11 08:13 Jupiter 4.4°N of Moon
12 02 N Taurid Meteor Shower
17 09 Leonid Meteor Shower
18 23:58 FULL MOON
19 00:03 Partial Lunar Eclipse; mag=0.974
19 03:21 Pleiades 4.5°N of Moon
19 08:59 Moon at Ascending Node
20 17:14 Moon at Apogee: 406276 km
23 18:22 Pollux 2.5°N of Moon
27 03:28 LAST QUARTER MOON
28 20 Mercury at Superior Conjunction
Dec 02 15:28 Mars 0.7°S of Moon: Occn.
03 05:58 Moon at Descending Node
03 22:33 Total Solar Eclipse; mag=1.037
03 22:43 NEW MOON
04 01:01 Moon at Perigee: 356794 km
06 15:48 Venus 1.9°N of Moon
07 16:52 Saturn 4.2°N of Moon
08 21:07 Jupiter 4.5°N of Moon
10 16:36 FIRST QUARTER MOON
13 22 Geminid Meteor Shower
16 09:30 Pleiades 4.5°N of Moon
16 15:12 Moon at Ascending Node
17 17:16 Moon at Apogee: 406322 km
18 19:36 FULL MOON
21 00:20 Pollux 2.6°N of Moon
21 06:59 Winter Solstice
22 06 Ursid Meteor Shower
26 17:24 LAST QUARTER MOON
27 00:15 Mars 4.4°N of Antares
28 20 Mercury 4.2°S of Venus
30 16:07 Moon at Descending Node
31 04:54 Antares 3.9°S of Moon
31 11:13 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
Alaska Standard Time
The following table gives the date and time of the Moon's phases for the year . The times listed are for Alaska Standard Time (Coordinated Universal Time − 9 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 | |||
| Alaska Standard Time | |||
| New Moon | First Quarter | Full Moon | Last Quarter |
| - | - | - | Jan 06 00:37 |
| Jan 12 20:00 | Jan 20 12:02 | Jan 28 10:16 | Feb 04 08:37 |
| Feb 11 10:06 | Feb 19 09:47 | Feb 26 23:17 | Mar 05 16:30 |
| Mar 13 01:21 | Mar 21 05:40 | Mar 28 09:48 | Apr 04 01:02 |
| Apr 11 17:31 | Apr 19 21:59 | Apr 26 18:31 | May 03 10:50 |
| May 11 10:00 | May 19 10:13 | May 26 02:14 t | Jun 01 22:24 |
| Jun 10 01:53 A | Jun 17 18:54 | Jun 24 09:40 | Jul 01 12:11 |
| Jul 09 16:17 | Jul 17 01:11 | Jul 23 17:37 | Jul 31 04:16 |
| Aug 08 04:50 | Aug 15 06:20 | Aug 22 03:02 | Aug 29 22:13 |
| Sep 06 15:52 | Sep 13 11:39 | Sep 20 14:55 | Sep 28 16:57 |
| Oct 06 02:05 | Oct 12 18:25 | Oct 20 05:57 | Oct 28 11:05 |
| Nov 04 12:15 | Nov 11 03:46 | Nov 18 23:58 p | Nov 27 03:28 |
| Dec 03 22:43 T | Dec 10 16:36 | Dec 18 19:36 | Dec 26 17:24 |
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)