2018Calendar of Astronomical Events
2018Phases 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(Greenwich Mean Time - 7 hours).If Daylight Saving Time is in effect, add one hour to the times listed.
| 2018 Phases of the Moon | |||
| Mountain Standard Time | |||
| New Moon | First Quarter | Full Moon | Last Quarter |
| - | - | Jan 1 19:24 | Jan 8 15:25 |
| Jan 16 19:17 | Jan 24 15:20 | Jan 31 06:27 t | Feb 7 08:54 |
| Feb 15 14:05 P | Feb 23 01:09 | Mar 1 17:51 | Mar 9 04:20 |
| Mar 17 06:12 | Mar 24 08:35 | Mar 31 05:37 | Apr 8 00:18 |
| Apr 15 18:57 | Apr 22 14:46 | Apr 29 17:58 | May 7 19:09 |
| May 15 04:48 | May 21 20:49 | May 29 07:20 | Jun 6 11:32 |
| Jun 13 12:43 | Jun 20 03:51 | Jun 27 21:53 | Jul 6 00:51 |
| Jul 12 19:48 P | Jul 19 12:52 | Jul 27 13:20 t | Aug 4 11:18 |
| Aug 11 02:58 P | Aug 18 00:49 | Aug 26 04:56 | Sep 2 19:37 |
| Sep 9 11:01 | Sep 16 16:15 | Sep 24 19:53 | Oct 2 02:45 |
| Oct 8 20:47 | Oct 16 11:02 | Oct 24 09:45 | Oct 31 09:40 |
| Nov 7 09:02 | Nov 15 07:54 | Nov 22 22:39 | Nov 29 17:19 |
| Dec 7 00:20 | Dec 15 04:49 | Dec 22 10:49 | Dec 29 02:34 |
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.
2018Calendar of Astronomical Events
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(Greenwich Mean Time - 7 hours).If Daylight Saving Time is in effect, add one hour to the times listed. A key to astronomical terms appears below the calendar.
| 2018Calendar of Astronomical Events | ||||||||
| Mountain Standard Time | ||||||||
| January - June | July - December | |||||||
Date MST Event (h:m)Jan 01 13 Mercury at Greatest Elong: 22.7°W 01 14:54 Moon at Perigee: 356566 km 01 19:24 FULL MOON 02 23 Earth at Perihelion: 0.98329 AU 03 12:50 Beehive 2.3°N of Moon 03 13 Quadrantid Meteor Shower 04 00:48 Moon at Ascending Node 05 00:24 Regulus 0.9°S of Moon 06 18 Mars 0.2°S of Jupiter 08 15:25 LAST QUARTER MOON 08 23 Venus at Superior Conjunction 10 22:59 Jupiter 4.3°S of Moon 11 03:03 Mars 4.6°S of Moon 13 01 Mercury 0.7°S of Saturn 14 19:10 Moon at Apogee: 406461 km 14 19:13 Saturn 2.6°S of Moon 15 00:24 Mercury 3.4°S of Moon 16 19:17 NEW MOON 18 07:28 Moon at Descending Node 23 10 Venus at Aphelion 24 15:20 FIRST QUARTER MOON 25 04 Mercury at Aphelion 27 03:09 Aldebaran 0.7°S of Moon 30 02:54 Moon at Perigee: 358995 km 31 00:19 Beehive 2.3°N of Moon 31 06:27 FULL MOON 31 06:30 Total Lunar Eclipse; mag=1.315 31 11:46 Moon at Ascending Node Feb 01 11:24 Regulus 0.9°S of Moon 07 08:54 LAST QUARTER MOON 07 12:47 Jupiter 4.3°S of Moon 08 22:12 Mars 4.4°S of Moon 11 07:16 Moon at Apogee: 405701 km 11 07:46 Saturn 2.5°S of Moon 11 09:40 Mars 5.0°N of Antares 14 14:11 Moon at Descending Node 15 13:51 Partial Solar Eclipse; mag=0.599 15 14:05 NEW MOON 17 05 Mercury at Superior Conjunction 23 01:09 FIRST QUARTER MOON 23 10:07 Aldebaran 0.7°S of Moon 27 07:48 Moon at Perigee: 363938 km 27 10:28 Beehive 2.3°N of Moon 27 22:03 Moon at Ascending Node 28 22:09 Regulus 0.9°S of MoonMar 01 17:51 FULL MOON 03 23 Mercury 1.1°N of Venus 04 07 Neptune in Conjunction with Sun 06 23:57 Jupiter 4.1°S of Moon 09 04:20 LAST QUARTER MOON 09 17:37 Mars 3.8°S of Moon 10 04 Mercury at Perihelion 10 19:37 Saturn 2.2°S of Moon 11 02:13 Moon at Apogee: 404682 km 13 20:47 Moon at Descending Node 15 08 Mercury at Greatest Elong: 18.4°E 17 06:12 NEW MOON 18 12:07 Venus 3.7°N of Moon 19 01 Mercury 3.8°N of Venus 20 09:15 Vernal Equinox 22 15:33 Aldebaran 0.9°S of Moon 24 08:35 FIRST QUARTER MOON 26 10:17 Moon at Perigee: 369104 km 26 17:52 Beehive 2.2°N of Moon 27 03:56 Moon at Ascending Node 28 06:38 Regulus 1.0°S of Moon 31 05:37 FULL MOON Apr 01 11 Mercury at Inferior Conjunction 02 12 Mars 1.3°S of Saturn 03 07:14 Jupiter 3.9°S of Moon 07 05:50 Saturn 1.9°S of Moon 07 11:15 Mars 3.1°S of Moon 07 22:32 Moon at Apogee: 404145 km 08 00:18 LAST QUARTER MOON 10 01:09 Moon at Descending Node 14 02:24 Mercury 3.9°N of Moon 15 18:57 NEW MOON 17 05 Saturn at Aphelion: 10.06564 AU 17 12:29 Venus 5.4°N of Moon 18 08 Uranus in Conjunction with Sun 18 21:45 Aldebaran 1.1°S of Moon 20 07:44 Moon at Perigee: 368713 km 22 11 Lyrid Meteor Shower 22 14:46 FIRST QUARTER MOON 22 23:17 Beehive 1.9°N of Moon 23 05:19 Moon at Ascending Node 24 09:47 Venus 3.4°S of Pleiades 24 12:39 Regulus 1.2°S of Moon 29 11 Mercury at Greatest Elong: 27.0°W 29 17:58 FULL MOON 30 10:16 Jupiter 3.8°S of MoonMay 02 06:29 Venus 6.3°N of Aldebaran 04 13:31 Saturn 1.7°S of Moon 05 00 Eta-Aquarid Meteor Shower 05 17:35 Moon at Apogee: 404458 km 06 00:24 Mars 2.7°S of Moon 07 03:23 Moon at Descending Node 07 19:09 LAST QUARTER MOON 08 17 Jupiter at Opposition 13 10:21 Mercury 2.4°N of Moon 15 04:48 NEW MOON 15 18 Venus at Perihelion 17 11:11 Venus 4.8°N of Moon 17 14:06 Moon at Perigee: 363777 km 20 04:57 Beehive 1.7°N of Moon 20 06:13 Moon at Ascending Node 21 17:53 Regulus 1.4°S of Moon 21 20:49 FIRST QUARTER MOON 27 10:39 Jupiter 4.0°S of Moon 29 07:20 FULL MOON 31 18:20 Saturn 1.6°S of MoonJun 02 09:34 Moon at Apogee: 405316 km 03 04:58 Mars 3.2°S of Moon 03 05:39 Moon at Descending Node 05 19 Mercury at Superior Conjunction 06 03 Mercury at Perihelion 06 11:32 LAST QUARTER MOON 07 20:37 Venus 4.6°S of Pollux 13 12:43 NEW MOON 14 16:55 Moon at Perigee: 359507 km 16 06:13 Venus 2.3°N of Moon 16 10:50 Moon at Ascending Node 16 12:38 Beehive 1.5°N of Moon 18 00:25 Regulus 1.7°S of Moon 19 19:21 Venus 0.4°N of Beehive 20 03:51 FIRST QUARTER MOON 21 03:07 Summer Solstice 23 11:47 Jupiter 4.2°S of Moon 24 14:37 Mercury 4.7°S of Pollux 27 05 Saturn at Opposition 27 20:59 Saturn 1.8°S of Moon 27 21:53 FULL MOON 29 19:43 Moon at Apogee: 406061 km 30 09:44 Moon at Descending Node 30 18:43 Mars 4.8°S of Moon | Date MST Event (h:m)Jul 03 22:39 Mercury 0.6°S of Beehive 06 00:51 LAST QUARTER MOON 06 10 Earth at Aphelion: 1.01670 AU 09 16:34 Venus 0.9°N of Regulus 10 02:30 Aldebaran 1.1°S of Moon 11 22 Mercury at Greatest Elong: 26.4°E 12 19:48 NEW MOON 12 20:01 Partial Solar Eclipse; mag=0.337 13 01:28 Moon at Perigee: 357432 km 13 19:50 Moon at Ascending Node 14 15:04 Mercury 2.2°S of Moon 15 09:14 Regulus 1.7°S of Moon 15 20:31 Venus 1.6°S of Moon 19 12:52 FIRST QUARTER MOON 20 03 Mercury at Aphelion 20 16:57 Jupiter 4.4°S of Moon 24 09:49 Mercury 1.2°S of Regulus 24 23:10 Saturn 2.0°S of Moon 26 23 Mars at Opposition 26 22:44 Moon at Apogee: 406223 km 27 13:20 FULL MOON 27 13:22 Total Lunar Eclipse; mag=1.609 27 15:40 Moon at Descending Node 28 02 Delta-Aquarid Meteor ShowerAug 04 11:18 LAST QUARTER MOON 06 11:35 Aldebaran 1.1°S of Moon 08 19 Mercury at Inferior Conjunction 10 06:40 Moon at Ascending Node 10 11:05 Moon at Perigee: 358083 km 11 02:46 Partial Solar Eclipse; mag=0.737 11 02:58 NEW MOON 12 18 Perseid Meteor Shower 14 06:35 Venus 6.3°S of Moon 17 03:38 Jupiter 4.5°S of Moon 17 09 Venus at Greatest Elong: 45.9°E 18 00:49 FIRST QUARTER MOON 20 19:09 Mercury 4.8°S of Beehive 21 02:55 Saturn 2.1°S of Moon 23 04:23 Moon at Apogee: 405744 km 23 21:51 Moon at Descending Node 26 04:56 FULL MOON 26 13 Mercury at Greatest Elong: 18.3°W 31 21:45 Venus 1.0°S of SpicaSep 02 03 Mercury at Perihelion 02 18:34 Aldebaran 1.2°S of Moon 02 19:37 LAST QUARTER MOON 06 15:42 Moon at Ascending Node 06 19:13 Beehive 1.4°N of Moon 07 10 Neptune at Opposition 07 18:21 Moon at Perigee: 361355 km 09 11:01 NEW MOON 13 19:21 Jupiter 4.4°S of Moon 16 06 Mars at Perihelion: 1.38144 AU 16 16:15 FIRST QUARTER MOON 17 09:46 Saturn 2.1°S of Moon 19 17:54 Moon at Apogee: 404875 km 19 23:38 Mars 4.8°S of Moon 20 02:30 Moon at Descending Node 20 19 Mercury at Superior Conjunction 22 18:54 Autumnal Equinox 24 19:52 FULL MOON 30 00:06 Aldebaran 1.4°S of MoonOct 02 02:45 LAST QUARTER MOON 03 20:10 Moon at Ascending Node 04 02:51 Beehive 1.3°N of Moon 05 14:58 Regulus 1.8°S of Moon 05 15:29 Moon at Perigee: 366396 km 08 20:47 NEW MOON 11 14:21 Jupiter 4.1°S of Moon 14 20:01 Saturn 1.8°S of Moon 15 20 Mercury 6.2°N of Venus 16 11:02 FIRST QUARTER MOON 17 05:03 Moon at Descending Node 17 12:16 Moon at Apogee: 404227 km 18 06:01 Mars 1.9°S of Moon 21 10 Orionid Meteor Shower 23 18 Uranus at Opposition 24 09:45 FULL MOON 26 07 Venus at Inferior Conjunction 27 06:04 Aldebaran 1.6°S of Moon 28 23 Mercury 3.1°S of Jupiter 30 20:46 Moon at Ascending Node 31 08:24 Beehive 1.0°N of Moon 31 09:40 LAST QUARTER MOON 31 13:05 Moon at Perigee: 370201 kmNov 01 21:16 Regulus 2.1°S of Moon 05 11 S Taurid Meteor Shower 06 08 Mercury at Greatest Elong: 23.3°E 07 09:02 NEW MOON 08 21:58 Mercury 1.8°N of Antares 11 08:46 Saturn 1.4°S of Moon 12 10 N Taurid Meteor Shower 13 07:04 Moon at Descending Node 14 08:57 Moon at Apogee: 404341 km 14 16:14 Venus 0.2°S of Spica 15 07:54 FIRST QUARTER MOON 15 21:16 Mars 1.0°N of Moon: Occn. 17 16 Leonid Meteor Shower 22 22:39 FULL MOON 23 14:11 Aldebaran 1.7°S of Moon 25 23 Jupiter in Conjunction with Sun 26 05:10 Moon at Perigee: 366623 km 26 22:18 Moon at Ascending Node 27 02 Mercury at Inferior Conjunction 27 13:57 Beehive 0.8°N of Moon 29 02 Mercury at Perihelion 29 02:27 Regulus 2.3°S of Moon 29 17:19 LAST QUARTER MOON Dec 03 11:42 Venus 3.6°S of Moon 05 14:06 Mercury 1.9°S of Moon 07 00:20 NEW MOON 08 22:30 Saturn 1.1°S of Moon: Occn. 10 10:57 Moon at Descending Node 12 05:25 Moon at Apogee: 405177 km 14 05 Geminid Meteor Shower 14 16:21 Mars 3.6°N of Moon 15 04 Mercury at Greatest Elong: 21.3°W 15 04:49 FIRST QUARTER MOON 21 00:31 Aldebaran 1.7°S of Moon 21 13 Mercury 0.8°N of Jupiter 21 15:22 Winter Solstice 22 01:05 Mercury 5.8°N of Antares 22 08:03 Jupiter 5.1°N of Antares 22 10:49 FULL MOON 22 14 Ursid Meteor Shower 24 02:52 Moon at Perigee: 361060 km 24 04:54 Moon at Ascending Node 24 21:52 Beehive 0.6°N of Moon 26 09:06 Regulus 2.5°S of Moon 26 11 Venus at Perihelion 29 02:34 LAST QUARTER 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: 2011 to 2020
The Americas
Below are links to calendars of astronomical events from 2011 to 2020 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 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | |||||
| EST | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | |||||
| CST | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | |||||
| MST | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | |||||
| PST | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | |||||
| AKST | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | |||||
| HST | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | |||||
- 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.