2023Calendar of Astronomical Events
2023Phases 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(Greenwich Mean Time - 4 hours).If Daylight Saving Time is in effect, add one hour to the times listed.
| 2023 Phases of the Moon | |||
| Atlantic Standard Time | |||
| New Moon | First Quarter | Full Moon | Last Quarter |
| - | - | Jan 6 19:08 | Jan 14 22:10 |
| Jan 21 16:53 | Jan 28 11:19 | Feb 5 14:29 | Feb 13 12:01 |
| Feb 20 03:06 | Feb 27 04:06 | Mar 7 08:40 | Mar 14 22:08 |
| Mar 21 13:23 | Mar 28 22:32 | Apr 6 00:35 | Apr 13 05:11 |
| Apr 20 00:12 H | Apr 27 17:20 | May 5 13:34 n | May 12 10:28 |
| May 19 11:53 | May 27 11:22 | Jun 3 23:42 | Jun 10 15:31 |
| Jun 18 00:37 | Jun 26 03:50 | Jul 3 07:39 | Jul 9 21:48 |
| Jul 17 14:32 | Jul 25 18:07 | Aug 1 14:31 | Aug 8 06:28 |
| Aug 16 05:38 | Aug 24 05:57 | Aug 30 21:35 | Sep 6 18:21 |
| Sep 14 21:40 | Sep 22 15:32 | Sep 29 05:57 | Oct 6 09:48 |
| Oct 14 13:55 A | Oct 21 23:29 | Oct 28 16:24 p | Nov 5 04:37 |
| Nov 13 05:27 | Nov 20 06:50 | Nov 27 05:16 | Dec 5 01:49 |
| Dec 12 19:32 | Dec 19 14:39 | Dec 26 20:33 | - |
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 table above. 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.
Phases of the Moon Photo Gallery is an image collection showing the Moon's phases over a complete synodic month.
2023Calendar of Astronomical Events
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(Greenwich Mean Time - 4 hours).If Daylight Saving Time is in effect, add one hour to the times listed. A key to astronomical terms appears below the calendar.
| 2023Calendar of Astronomical Events | ||||||||
| Atlantic Standard Time | ||||||||
| January - June | July - December | |||||||
Date AST Event (h:m)Jan 01 11:25 Moon at Ascending Node 02 16 Mercury at Perihelion 02 21:24 Pleiades 2.6°N of Moon 03 15:35 Mars 0.5°N of Moon: Occn. 03 23 Quadrantid Meteor Shower 04 12 Earth at Perihelion: 0.98329 AU 06 19:08 FULL MOON 07 09 Mercury at Inferior Conjunction 07 09:40 Pollux 1.9°N of Moon 08 05:19 Moon at Apogee: 406459 km 08 11:23 Beehive 3.6°S of Moon 10 07:38 Regulus 4.6°S of Moon 14 17:59 Spica 3.9°S of Moon 14 22:10 LAST QUARTER MOON 16 02:32 Moon at Descending Node 18 05:32 Antares 2.1°S of Moon 20 08 Jupiter at Perihelion: 4.95101 AU 21 16:53 NEW MOON 21 16:58 Moon at Perigee: 356570 km 22 18 Venus 0.3°S of Saturn 23 03:22 Saturn 3.8°N of Moon 23 04:20 Venus 3.5°N of Moon 25 22:00 Jupiter 1.8°N of Moon 28 11:19 FIRST QUARTER MOON 28 12:05 Moon at Ascending Node 30 02 Mercury at Greatest Elong: 25.0°W 30 03:21 Pleiades 2.4°N of Moon 31 00:24 Mars 0.1°N of Moon: Occn.Feb 03 15:47 Pollux 1.9°N of Moon 04 04:55 Moon at Apogee: 406476 km 04 17:32 Beehive 3.5°S of Moon 05 14:29 FULL MOON 06 13:44 Regulus 4.5°S of Moon 11 00:23 Spica 3.6°S of Moon 12 03:31 Moon at Descending Node 13 12:01 LAST QUARTER MOON 14 14:09 Antares 1.9°S of Moon 15 16 Mercury at Aphelion 16 12 Saturn in Conjunction with Sun 18 16:53 Mercury 3.6°N of Moon 19 05:06 Moon at Perigee: 358267 km 20 03:06 NEW MOON 22 03:57 Venus 2.1°N of Moon 22 17:58 Jupiter 1.2°N of Moon: Occn. 24 14:56 Moon at Ascending Node 26 10:42 Pleiades 2.1°N of Moon 27 04:06 FIRST QUARTER MOON 28 00:32 Mars 1.1°S of Moon: Occn.Mar 02 00 Venus 0.5°N of Jupiter 02 10 Mercury 0.9°S of Saturn 02 22:10 Pollux 1.7°N of Moon 03 14:01 Moon at Apogee: 405890 km 03 23:56 Beehive 3.6°S of Moon 05 20:08 Regulus 4.5°S of Moon 07 08:40 FULL MOON 10 06:06 Spica 3.4°S of Moon 11 04:53 Moon at Descending Node 13 20:21 Antares 1.6°S of Moon 14 22:08 LAST QUARTER MOON 15 19 Neptune in Conjunction with Sun 17 07 Mercury at Superior Conjunction 19 11:16 Moon at Perigee: 362698 km 19 11:20 Saturn 3.6°N of Moon 20 17:25 Vernal Equinox 21 13:23 NEW MOON 23 22:08 Moon at Ascending Node 24 06:28 Venus 0.1°N of Moon: Occn. 25 19:42 Pleiades 1.9°N of Moon 28 00 Mercury 1.3°N of Jupiter 28 09:16 Mars 2.3°S of Moon 28 22:32 FIRST QUARTER MOON 30 05:23 Pollux 1.6°N of Moon 31 07:07 Beehive 3.8°S of Moon 31 07:18 Moon at Apogee: 404921 km 31 16 Mercury at Perihelion Apr 02 03:22 Regulus 4.6°S of Moon 06 00:35 FULL MOON 06 12:45 Spica 3.3°S of Moon 07 09:51 Moon at Descending Node 10 01:50 Antares 1.5°S of Moon 11 00:42 Venus 2.5°S of Pleiades 11 17 Jupiter in Conjunction with Sun 11 18 Mercury at Greatest Elong: 19.5°E 13 05:11 LAST QUARTER MOON 15 22:22 Moon at Perigee: 367967 km 15 23:47 Saturn 3.5°N of Moon 17 12 Venus at Perihelion 19 05:08 Venus 7.3°N of Aldebaran 20 00:12 NEW MOON 20 00:17 Hybrid Solar Eclipse; mag=1.013 20 07:32 Moon at Ascending Node 22 05:14 Pleiades 1.9°N of Moon 22 21 Lyrid Meteor Shower 23 09:03 Venus 1.3°S of Moon 25 22:18 Mars 3.2°S of Moon 26 13:26 Pollux 1.5°N of Moon 27 15:02 Beehive 3.8°S of Moon 27 17:20 FIRST QUARTER MOON 28 02:43 Moon at Apogee: 404300 km 29 11:21 Regulus 4.7°S of MoonMay 01 19 Mercury at Inferior Conjunction 03 20:55 Spica 3.3°S of Moon 04 17:57 Moon at Descending Node 05 10 Eta-Aquarid Meteor Shower 05 13:23 Pen. Lunar Eclipse; mag=0.964 05 13:34 FULL MOON 07 08:35 Antares 1.5°S of Moon 08 07:27 Mars 4.9°S of Pollux 09 17 Uranus in Conjunction with Sun 11 00:57 Moon at Perigee: 369345 km 12 10:28 LAST QUARTER MOON 13 09:04 Saturn 3.3°N of Moon 17 09 Mercury 6.2°N of Jupiter 17 09:15 Jupiter 0.8°S of Moon: Occn. 17 15:36 Moon at Ascending Node 17 21:34 Mercury 3.6°S of Moon 19 11:53 NEW MOON 23 08:08 Venus 2.2°S of Moon 23 21:37 Pollux 1.6°N of Moon 24 13:32 Mars 3.8°S of Moon 24 23:06 Beehive 3.8°S of Moon 25 21:39 Moon at Apogee: 404510 km 26 19:30 Regulus 4.6°S of Moon 27 11:22 FIRST QUARTER MOON 29 01 Mercury at Greatest Elong: 24.9°W 29 09:04 Venus 3.9°S of Pollux 30 17 Mars at Aphelion: 1.66594 AU 31 06:05 Spica 3.3°S of MoonJun 01 02:22 Moon at Descending Node 01 23:35 Mars 0.1°S of Beehive 03 17:19 Antares 1.6°S of Moon 03 23:42 FULL MOON 04 07 Venus at Greatest Elong: 45.4°E 06 19:07 Moon at Perigee: 364860 km 09 16:19 Saturn 3.0°N of Moon 10 15:31 LAST QUARTER MOON 11 13:50 Mercury 5.9°S of Pleiades 13 07:05 Venus 0.5°N of Beehive 13 20:05 Moon at Ascending Node 14 02:33 Jupiter 1.5°S of Moon 15 20:47 Pleiades 1.8°N of Moon 16 16:16 Mercury 4.2°N of Aldebaran 16 16:39 Mercury 4.3°S of Moon 18 00:37 NEW MOON 20 05:10 Pollux 1.7°N of Moon 21 06:38 Beehive 3.6°S of Moon 21 10:58 Summer Solstice 21 20:47 Venus 3.7°S of Moon 22 06:09 Mars 3.8°S of Moon 22 14:30 Moon at Apogee: 405385 km 23 03:08 Regulus 4.4°S of Moon 26 03:50 FIRST QUARTER MOON 27 15 Mercury at Perihelion 27 15:08 Spica 3.1°S of Moon 28 08:22 Moon at Descending Node | Date AST Event (h:m)Jul 01 01 Mercury at Superior Conjunction 01 02 Venus 3.6°N of Mars 01 03:20 Antares 1.5°S of Moon 03 07:39 FULL MOON 04 18:28 Moon at Perigee: 360151 km 06 15 Earth at Aphelion: 1.01668 AU 06 23:05 Saturn 2.7°N of Moon 09 21:48 LAST QUARTER MOON 10 01:21 Mars 0.6°N of Regulus 10 21:23 Moon at Ascending Node 11 17:18 Jupiter 2.2°S of Moon 13 02:31 Pleiades 1.7°N of Moon 14 18:33 Mercury 0.2°N of Beehive 16 04:05 Venus 1.7°S of Regulus 17 14:32 NEW MOON 19 04:56 Mercury 3.5°S of Moon 20 02:56 Moon at Apogee: 406291 km 20 09:53 Regulus 4.2°S of Moon 21 00:00 Mars 3.3°S of Moon 24 23:01 Spica 2.8°S of Moon 25 11:05 Moon at Descending Node 25 18:07 FIRST QUARTER MOON 27 07 Mercury 5.1°N of Venus 28 12 Delta-Aquarid Meteor Shower 28 13:11 Antares 1.3°S of Moon 28 14:21 Mercury 0.1°S of RegulusAug 01 14:31 FULL MOON 02 01:52 Moon at Perigee: 357311 km 03 06:21 Saturn 2.5°N of Moon 06 22:46 Moon at Ascending Node 07 20 Venus at Aphelion 08 05:41 Jupiter 2.9°S of Moon 08 06:28 LAST QUARTER MOON 09 08:16 Pleiades 1.5°N of Moon 09 22 Mercury at Greatest Elong: 27.4°E 10 14 Mercury at Aphelion 13 03 Perseid Meteor Shower 13 04 Mercury 4.7°S of Mars 13 07 Venus at Inferior Conjunction 13 17:36 Pollux 1.7°N of Moon 16 05:38 NEW MOON 16 07:55 Moon at Apogee: 406635 km 18 19:06 Mars 2.2°S of Moon 21 05:28 Spica 2.6°S of Moon 21 12:23 Moon at Descending Node 24 05:57 FIRST QUARTER MOON 24 21:29 Antares 1.1°S of Moon 27 04 Saturn at Opposition 30 11:51 Moon at Perigee: 357182 km 30 14:03 Saturn 2.5°N of Moon 30 21:35 FULL MOON Sep 03 03:44 Moon at Ascending Node 04 15:44 Jupiter 3.3°S of Moon 05 15:25 Pleiades 1.2°N of Moon 06 07 Mercury at Inferior Conjunction 06 18:21 LAST QUARTER MOON 09 23:32 Pollux 1.5°N of Moon 11 01:15 Beehive 3.6°S of Moon 12 11:42 Moon at Apogee: 406289 km 12 22:00 Regulus 4.1°S of Moon 14 21:40 NEW MOON 17 11:12 Spica 2.4°S of Moon 17 15:18 Moon at Descending Node 19 06 Neptune at Opposition 21 03:50 Antares 0.9°S of Moon 22 09 Mercury at Greatest Elong: 17.9°W 22 15:32 FIRST QUARTER MOON 23 02:50 Autumnal Equinox 23 14 Mercury at Perihelion 26 21:25 Saturn 2.7°N of Moon 27 21:05 Moon at Perigee: 359911 km 29 05:57 FULL MOON 30 12:49 Moon at Ascending Node Oct 01 23:16 Jupiter 3.4°S of Moon 03 00:25 Pleiades 1.1°N of Moon 06 09:48 LAST QUARTER MOON 07 06:23 Pollux 1.4°N of Moon 08 07:57 Beehive 3.7°S of Moon 09 02:08 Venus 2.3°S of Regulus 09 23:41 Moon at Apogee: 405426 km 10 04:41 Regulus 4.2°S of Moon 14 13:55 NEW MOON 14 13:59 Annular Solar Eclipse; mag=0.952 14 21:11 Moon at Descending Node 18 09:17 Antares 0.9°S of Moon 20 01 Mercury at Superior Conjunction 21 20 Orionid Meteor Shower 21 23:29 FIRST QUARTER MOON 23 18 Venus at Greatest Elong: 46.4°W 24 03:52 Saturn 2.8°N of Moon 25 22:53 Moon at Perigee: 364873 km 27 23:14 Moon at Ascending Node 28 16:14 Partial Lunar Eclipse; mag=0.122 28 16:24 FULL MOON 29 04:10 Jupiter 3.1°S of Moon 30 10:30 Pleiades 1.1°N of MoonNov 03 00 Jupiter at Opposition 03 14:31 Pollux 1.4°N of Moon 04 15:46 Beehive 3.7°S of Moon 05 04:37 LAST QUARTER MOON 05 20 S Taurid Meteor Shower 06 12:19 Regulus 4.2°S of Moon 06 17:49 Moon at Apogee: 404569 km 09 05:28 Venus 1.0°S of Moon: Occn. 11 01:09 Spica 2.4°S of Moon 11 04:49 Moon at Descending Node 12 20 N Taurid Meteor Shower 13 05:27 NEW MOON 13 14 Uranus at Opposition 16 17:17 Mercury 2.5°N of Antares 18 01 Mars in Conjunction with Sun 18 02 Leonid Meteor Shower 20 06:50 FIRST QUARTER MOON 20 10:02 Saturn 2.7°N of Moon 21 17:03 Moon at Perigee: 369824 km 24 07:02 Moon at Ascending Node 25 07:10 Jupiter 2.8°S of Moon 26 20:02 Pleiades 1.1°N of Moon 27 05:16 FULL MOON 28 05 Venus at Perihelion 29 06:27 Venus 3.9°N of Spica 30 23:23 Pollux 1.6°N of MoonDec 02 00:21 Beehive 3.6°S of Moon 03 20:38 Regulus 4.0°S of Moon 04 10 Mercury at Greatest Elong: 21.3°E 04 14:42 Moon at Apogee: 404348 km 05 01:49 LAST QUARTER MOON 08 10:05 Spica 2.3°S of Moon 08 11:24 Moon at Descending Node 09 12:53 Venus 3.6°N of Moon 12 19:32 NEW MOON 14 01:18 Mercury 4.4°N of Moon 14 15 Geminid Meteor Shower 16 14:53 Moon at Perigee: 367900 km 17 17:58 Saturn 2.5°N of Moon 19 14:39 FIRST QUARTER MOON 20 13 Mercury at Perihelion 21 09:54 Moon at Ascending Node 21 23:28 Winter Solstice 22 10:20 Jupiter 2.6°S of Moon 22 15 Mercury at Inferior Conjunction 22 23 Ursid Meteor Shower 24 03:37 Pleiades 1.1°N of Moon 26 20:33 FULL MOON 27 18 Mercury 3.6°N of Mars 28 07:51 Pollux 1.7°N of Moon 29 08:45 Beehive 3.4°S of Moon 31 04:52 Regulus 3.8°S of Moon | |||||||
Terms Used in Astronomical Events Calendar
- 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
- Beehive - bright star cluster in the constellation Cancer
Calendars of Astronomical Events: 2021 to 2030
The Americas
Below are links to calendars of astronomical events from 2021 to 2030 for seven time zones in the Americas.
Choose a time zone and click on a year to get a calendar of astronomical events for that year.
| Calendars of Astronomical Events - The Americas | |||||||||||||||
| 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 | |||||
- AST = Atlantic Standard Time (= GMT - 4 hours)
- EST = Eastern Standard Time (= GMT - 5 hours)
- CST = Central Standard Time (= GMT - 6 hours)
- MST = Mountain Standard Time (= GMT - 7 hours)
- PST = Pacific Standard Time (= GMT - 8 hours)
- AKST = Alaskan Standard Time (= GMT - 9 hours)
- HST = Hawaiian Standard Time (= GMT - 10 hours)
(where GMT = Greenwich Mean 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 Greenwich Mean Time to help in identification.
For other years and other time zones, visit: Calendars of Astronomical Events.