2021 Sky Event Almanac
Mountain Standard Time
The following table gives the date and time of the important astronomical events for the year . The times listed are for Mountain Standard Time (Coordinated Universal Time − 7 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 | ||||||||
| Mountain Standard Time | ||||||||
| January - June | July - December | |||||||
Date MST Event
(h:m)
Jan 02 07 Earth at Perihelion: 0.98325 AU
02 14:58 Regulus 4.7°S of Moon
03 08 Quadrantid Meteor Shower
06 02:37 LAST QUARTER MOON
09 08:39 Moon at Perigee: 367390 km
10 13:14 Moon at Descending Node
11 13:12 Venus 1.5°N of Moon
12 22:00 NEW MOON
14 01:15 Mercury 2.3°N of Moon
20 14:02 FIRST QUARTER MOON
21 06:11 Moon at Apogee: 404361 km
23 19 Mercury at Greatest Elong: 18.6°E
23 19 Saturn in Conjunction with Sun
24 14:47 Moon at Ascending Node
27 08:46 Pollux 3.8°N of Moon
28 12:16 FULL MOON
28 18 Jupiter in Conjunction with Sun
28 19 Mercury at Perihelion
29 21:56 Regulus 4.6°S of Moon
Feb 03 12:33 Moon at Perigee: 370127 km
04 10:37 LAST QUARTER MOON
06 17:29 Moon at Descending Node
08 07 Mercury at Inferior Conjunction
10 04:16 Saturn 3.4°N of Moon
11 12:06 NEW MOON
18 03:22 Moon at Apogee: 404467 km
18 15:47 Mars 3.7°N of Moon
19 11:47 FIRST QUARTER MOON
19 22 Venus at Aphelion
20 18:44 Moon at Ascending Node
23 01 Mercury 4.0°N of Saturn
23 18:10 Pollux 3.7°N of Moon
26 07:04 Regulus 4.6°S of Moon
27 01:17 FULL MOON
Mar 01 22:19 Moon at Perigee: 365422 km
03 16:36 Mars 2.6°S of Pleiades
04 22 Mercury 0.3°N of Jupiter
05 17:56 Moon at Descending Node
05 18:30 LAST QUARTER MOON
06 04 Mercury at Greatest Elong: 27.3°W
09 16:02 Saturn 3.7°N of Moon
10 08:35 Jupiter 4.0°N of Moon
10 17 Neptune in Conjunction with Sun
10 18:02 Mercury 3.7°N of Moon
13 03:21 NEW MOON
13 19 Mercury at Aphelion
17 22:04 Moon at Apogee: 405253 km
19 10:48 Mars 1.9°N of Moon
19 20:31 Moon at Ascending Node
20 02:37 Vernal Equinox
21 07:40 FIRST QUARTER MOON
23 03:26 Pollux 3.5°N of Moon
25 17:17 Regulus 4.7°S of Moon
25 23 Venus at Superior Conjunction
28 11:48 FULL MOON
29 23:12 Moon at Perigee: 360311 km
Apr 01 13:49 Antares 4.9°S of Moon
01 19:41 Moon at Descending Node
04 03:02 LAST QUARTER MOON
06 01:34 Saturn 4.0°N of Moon
07 00:15 Jupiter 4.4°N of Moon
11 19:31 NEW MOON
14 10:47 Moon at Apogee: 406120 km
15 22:53 Moon at Ascending Node
17 05:09 Mars 0.1°N of Moon: Occn.
18 19 Mercury at Superior Conjunction
19 11:18 Pollux 3.2°N of Moon
19 23:59 FIRST QUARTER MOON
22 05 Lyrid Meteor Shower
26 18 Mercury at Perihelion
26 20:31 FULL MOON
27 08:24 Moon at Perigee: 357379 km
28 23:07 Antares 4.8°S of Moon
29 02:17 Moon at Descending Node
30 14 Uranus in Conjunction with Sun
May 03 10:02 Saturn 4.2°N of Moon
03 12:50 LAST QUARTER MOON
03 20:03 Mercury 2.1°S of Pleiades
04 14:00 Jupiter 4.6°N of Moon
04 18 Eta-Aquarid Meteor Shower
11 12:00 NEW MOON
11 14:54 Moon at Apogee: 406512 km
13 03:29 Moon at Ascending Node
13 10:59 Mercury 2.1°N of Moon
15 21:47 Mars 1.5°S of Moon
16 17:39 Pollux 3.1°N of Moon
16 23 Mercury at Greatest Elong: 22.0°E
19 12:13 FIRST QUARTER MOON
25 18:52 Moon at Perigee: 357310 km
26 04:14 FULL MOON
26 04:19 Total Lunar Eclipse; mag=1.009
26 09:55 Antares 4.8°S of Moon
26 12:38 Moon at Descending Node
28 20 Mercury 0.4°S of Venus
30 18:22 Saturn 4.2°N of Moon
Jun 01 01:57 Jupiter 4.6°N of Moon
02 00:24 LAST QUARTER MOON
07 19:27 Moon at Apogee: 406230 km
09 09:42 Moon at Ascending Node
10 03:42 Annular Solar Eclipse; mag=0.943
10 03:53 NEW MOON
10 18 Mercury at Inferior Conjunction
11 23:44 Venus 1.5°S of Moon
12 06 Venus at Perihelion
12 23:19 Pollux 3.1°N of Moon
13 12:52 Mars 2.8°S of Moon
17 20:54 FIRST QUARTER MOON
20 20:32 Summer Solstice
22 20:26 Antares 4.8°S of Moon
22 23:07 Moon at Descending Node
23 02:58 Moon at Perigee: 359960 km
24 11:40 FULL MOON
27 02:30 Saturn 4.0°N of Moon
28 11:38 Jupiter 4.5°N of Moon
|
Date MST Event
(h:m)
Jul 01 14:11 LAST QUARTER MOON
04 13 Mercury at Greatest Elong: 21.6°W
05 07:48 Moon at Apogee: 405342 km
05 16 Earth at Aphelion: 1.01673 AU
06 15:41 Moon at Ascending Node
07 21:38 Mercury 3.7°S of Moon
09 18:17 NEW MOON
12 02:10 Venus 3.3°S of Moon
12 03:10 Mars 3.8°S of Moon
12 17 Mars at Aphelion: 1.66596 AU
13 06 Venus 0.5°N of Mars
17 03:11 FIRST QUARTER MOON
20 05:06 Antares 4.7°S of Moon
20 06:22 Moon at Descending Node
21 03:30 Moon at Perigee: 364520 km
21 14:21 Venus 1.0°N of Regulus
23 18 Mercury at Perihelion
23 19:37 FULL MOON
24 09:42 Saturn 3.8°N of Moon
25 18:17 Jupiter 4.2°N of Moon
27 20 Delta-Aquarid Meteor Shower
29 07:09 Mars 0.6°N of Regulus
31 06:16 LAST QUARTER MOON
Aug 01 07 Mercury at Superior Conjunction
01 22 Saturn at Opposition
02 00:35 Moon at Apogee: 404412 km
02 19:51 Moon at Ascending Node
06 12:42 Pollux 3.1°N of Moon
08 06:50 NEW MOON
09 17:42 Mars 4.3°S of Moon
11 00:00 Venus 4.3°S of Moon
12 12 Perseid Meteor Shower
15 08:20 FIRST QUARTER MOON
16 09:04 Moon at Descending Node
16 11:34 Antares 4.5°S of Moon
17 02:23 Moon at Perigee: 369127 km
18 20 Mercury 0.1°S of Mars
19 16 Jupiter at Opposition
20 15:19 Saturn 3.7°N of Moon
21 21:52 Jupiter 4.0°N of Moon
22 05:02 FULL MOON
29 19:22 Moon at Apogee: 404100 km
29 22:13 Moon at Ascending Node
30 00:13 LAST QUARTER MOON
Sep 02 21:04 Pollux 3.0°N of Moon
05 07:32 Venus 1.4°N of Spica
05 17 Mercury at Aphelion
06 17:52 NEW MOON
09 19:09 Venus 4.1°S of Moon
11 03:05 Moon at Perigee: 368464 km
12 09:35 Moon at Descending Node
12 16:59 Antares 4.2°S of Moon
13 13:39 FIRST QUARTER MOON
13 21 Mercury at Greatest Elong: 26.8°E
14 01 Neptune at Opposition
16 19:37 Saturn 3.8°N of Moon
17 23:50 Jupiter 4.0°N of Moon
20 16:55 FULL MOON
20 19:00 Mercury 1.2°S of Spica
22 12:21 Autumnal Equinox
26 00:33 Moon at Ascending Node
26 14:44 Moon at Apogee: 404641 km
28 18:57 LAST QUARTER MOON
30 05:44 Pollux 2.8°N of Moon
Oct 02 15 Venus at Aphelion
06 04:05 NEW MOON
07 21 Mars in Conjunction with Sun
08 10:28 Moon at Perigee: 363388 km
09 09 Mercury at Inferior Conjunction
09 11:36 Venus 2.9°S of Moon
09 12:35 Moon at Descending Node
09 23:27 Antares 4.0°S of Moon
12 20:25 FIRST QUARTER MOON
14 00:12 Saturn 3.9°N of Moon
15 02:58 Jupiter 4.1°N of Moon
16 06:24 Venus 1.4°N of Antares
19 17 Mercury at Perihelion
20 07:57 FULL MOON
21 04 Orionid Meteor Shower
22 22:45 Pleiades 4.5°N of Moon
23 04:47 Moon at Ascending Node
24 08:30 Moon at Apogee: 405616 km
24 22 Mercury at Greatest Elong: 18.4°W
27 13:40 Pollux 2.6°N of Moon
28 13:05 LAST QUARTER MOON
29 15 Venus at Greatest Elong: 47.0°E
Nov 01 18:18 Mercury 3.7°N of Spica
03 11:40 Mercury 1.2°S of Moon: Occn.
04 14:15 NEW MOON
04 17 Uranus at Opposition
05 05 S Taurid Meteor Shower
05 15:23 Moon at Perigee: 358845 km
05 20:38 Moon at Descending Node
06 08:29 Antares 3.9°S of Moon
07 22:21 Venus 1.1°S of Moon: Occn.
10 07:27 Saturn 4.1°N of Moon
11 05:46 FIRST QUARTER MOON
11 10:13 Jupiter 4.4°N of Moon
12 04 N Taurid Meteor Shower
17 11 Leonid Meteor Shower
19 01:58 FULL MOON
19 02:03 Partial Lunar Eclipse; mag=0.974
19 05:21 Pleiades 4.5°N of Moon
19 10:59 Moon at Ascending Node
20 19:14 Moon at Apogee: 406276 km
23 20:22 Pollux 2.5°N of Moon
27 05:28 LAST QUARTER MOON
28 22 Mercury at Superior Conjunction
Dec 02 17:28 Mars 0.7°S of Moon: Occn.
03 07:58 Moon at Descending Node
04 00:33 Total Solar Eclipse; mag=1.037
04 00:43 NEW MOON
04 03:01 Moon at Perigee: 356794 km
06 17:48 Venus 1.9°N of Moon
07 18:52 Saturn 4.2°N of Moon
08 23:07 Jupiter 4.5°N of Moon
10 18:36 FIRST QUARTER MOON
14 00 Geminid Meteor Shower
16 11:30 Pleiades 4.5°N of Moon
16 17:12 Moon at Ascending Node
17 19:16 Moon at Apogee: 406322 km
18 21:36 FULL MOON
21 02:20 Pollux 2.6°N of Moon
21 08:59 Winter Solstice
22 08 Ursid Meteor Shower
26 19:24 LAST QUARTER MOON
27 02:15 Mars 4.4°N of Antares
28 22 Mercury 4.2°S of Venus
30 18:07 Moon at Descending Node
31 06:54 Antares 3.9°S of Moon
31 13:13 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
Mountain Standard Time
The following table gives the date and time of the Moon's phases for the year . The times listed are for Mountain Standard Time (Coordinated Universal Time − 7 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 | |||
| Mountain Standard Time | |||
| New Moon | First Quarter | Full Moon | Last Quarter |
| - | - | - | Jan 06 02:37 |
| Jan 12 22:00 | Jan 20 14:02 | Jan 28 12:16 | Feb 04 10:37 |
| Feb 11 12:06 | Feb 19 11:47 | Feb 27 01:17 | Mar 05 18:30 |
| Mar 13 03:21 | Mar 21 07:40 | Mar 28 11:48 | Apr 04 03:02 |
| Apr 11 19:31 | Apr 19 23:59 | Apr 26 20:31 | May 03 12:50 |
| May 11 12:00 | May 19 12:13 | May 26 04:14 t | Jun 02 00:24 |
| Jun 10 03:53 A | Jun 17 20:54 | Jun 24 11:40 | Jul 01 14:11 |
| Jul 09 18:17 | Jul 17 03:11 | Jul 23 19:37 | Jul 31 06:16 |
| Aug 08 06:50 | Aug 15 08:20 | Aug 22 05:02 | Aug 30 00:13 |
| Sep 06 17:52 | Sep 13 13:39 | Sep 20 16:55 | Sep 28 18:57 |
| Oct 06 04:05 | Oct 12 20:25 | Oct 20 07:57 | Oct 28 13:05 |
| Nov 04 14:15 | Nov 11 05:46 | Nov 19 01:58 p | Nov 27 05:28 |
| Dec 04 00:43 T | Dec 10 18:36 | Dec 18 21:36 | Dec 26 19:24 |
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)