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