2011 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.
| 2011 Sky Event Almanac | ||||||||
| Mountain Standard Time | ||||||||
| January - June | July - December | |||||||
Date MST Event
(h:m)
Jan 01 11:07 Antares 2.5°S of Moon
02 07:32 Mercury 3.8°N of Moon
03 05:48 Moon at Ascending Node
03 12 Earth at Perihelion: 0.98334 AU
03 18 Quadrantid Meteor Shower
04 01:51 Partial Solar Eclipse; mag=0.858
04 02:03 NEW MOON
08 08 Venus at Greatest Elong: 47.0°W
09 07 Mercury at Greatest Elong: 23.3°W
09 22:38 Moon at Apogee: 404976 km
12 04:31 FIRST QUARTER MOON
15 05:39 Pleiades 1.3°N of Moon
17 17:06 Moon at Descending Node
19 14:21 FULL MOON
21 17:10 Moon at Perigee: 362793 km
25 10:38 Spica 3.0°N of Moon
26 05:57 LAST QUARTER MOON
28 16:53 Antares 2.6°S of Moon
29 20:36 Venus 3.5°N of Moon
30 11:29 Moon at Ascending Node
31 02 Mercury at Aphelion
Feb 01 11:14 Mercury 3.6°S of Moon
02 19:31 NEW MOON
04 10 Mars in Conjunction with Sun
06 16:13 Moon at Apogee: 405924 km
11 00:18 FIRST QUARTER MOON
11 14:32 Pleiades 1.4°N of Moon
14 01:14 Moon at Descending Node
17 02 Neptune in Conjunction with Sun
18 01:36 FULL MOON
19 00:27 Moon at Perigee: 358247 km
21 18:02 Spica 2.8°N of Moon
24 16:26 LAST QUARTER MOON
24 22:26 Antares 2.8°S of Moon
25 01 Mercury at Superior Conjunction
26 13:19 Moon at Ascending Node
28 20:40 Venus 1.6°S of Moon
Mar 04 13:46 NEW MOON
06 00:50 Moon at Apogee: 406584 km
09 07 Mars at Perihelion: 1.38138 AU
10 21:35 Pleiades 1.7°N of Moon
12 16:45 FIRST QUARTER MOON
13 04:55 Moon at Descending Node
15 13 Mercury 2.0°N of Jupiter
16 01 Mercury at Perihelion
17 10 Jupiter at Perihelion: 4.94839 AU
19 11:10 FULL MOON
19 12:09 Moon at Perigee: 356578 km
20 16:21 Vernal Equinox
21 04:00 Spica 2.6°N of Moon
21 05 Uranus in Conjunction with Sun
22 18 Mercury at Greatest Elong: 18.6°E
24 05:48 Antares 3.0°S of Moon
25 14:09 Moon at Ascending Node
26 05:07 LAST QUARTER MOON
Apr 02 02:00 Moon at Apogee: 406656 km
03 07:32 NEW MOON
03 16 Saturn at Opposition
06 08 Jupiter in Conjunction with Sun
07 03:19 Pleiades 1.9°N of Moon
09 05:48 Moon at Descending Node
09 12 Mercury at Inferior Conjunction
11 05:05 FIRST QUARTER MOON
16 22:59 Moon at Perigee: 358088 km
17 15:04 Spica 2.5°N of Moon
17 19:44 FULL MOON
18 17 Venus at Aphelion
19 11 Mercury 0.6°N of Mars
20 15:21 Antares 3.2°S of Moon
21 18:05 Moon at Ascending Node
22 16 Lyrid Meteor Shower
24 19:47 LAST QUARTER MOON
29 11:02 Moon at Apogee: 406043 km
30 21 Mars 0.4°N of Jupiter
May 02 23:51 NEW MOON
04 09:05 Pleiades 2.0°N of Moon
05 05 Eta-Aquarid Meteor Shower
06 07:54 Moon at Descending Node
07 12 Mercury at Greatest Elong: 26.6°W
07 22 Mercury 1.4°S of Venus
10 13:33 FIRST QUARTER MOON
11 08 Venus 0.6°S of Jupiter
11 13 Mercury 2.1°S of Jupiter
15 01:08 Spica 2.6°N of Moon
15 04:18 Moon at Perigee: 362133 km
17 04:09 FULL MOON
18 00 Mercury 1.4°S of Venus
18 01:46 Antares 3.3°S of Moon
19 02:03 Moon at Ascending Node
21 01 Mercury 2.1°S of Mars
23 02 Venus 1.0°S of Mars
24 11:52 LAST QUARTER MOON
27 02:58 Moon at Apogee: 405006 km
30 13:04 Mars 3.8°S of Moon
30 21:00 Venus 4.4°S of Moon
Jun 01 14:03 NEW MOON
01 14:16 Partial Solar Eclipse; mag=0.601
02 13:21 Moon at Descending Node
08 19:11 FIRST QUARTER MOON
11 08:57 Spica 2.6°N of Moon
11 18:42 Moon at Perigee: 367188 km
12 01 Mercury at Perihelion
12 16 Mercury at Superior Conjunction
14 11:17 Antares 3.3°S of Moon
15 11:35 Moon at Ascending Node
15 13:13 Total Lunar Eclipse; mag=1.700
15 13:13 FULL MOON
17 05:15 Venus 4.6°N of Aldebaran
20 18:24 Mars 4.2°S of Pleiades
21 10:16 Summer Solstice
23 04:48 LAST QUARTER MOON
23 21:13 Moon at Apogee: 404275 km
27 23:52 Pleiades 2.0°N of Moon
28 00:40 Mercury 4.7°S of Pollux
28 11:59 Mars 1.7°S of Moon
29 21:14 Moon at Descending Node
|
Date MST Event
(h:m)
Jul 01 01:38 Partial Solar Eclipse; mag=0.097
01 01:54 NEW MOON
04 08 Earth at Aphelion: 1.01674 AU
07 07:04 Moon at Perigee: 369566 km
07 23:29 FIRST QUARTER MOON
08 14:44 Spica 2.6°N of Moon
11 18:48 Antares 3.3°S of Moon
12 19:27 Moon at Ascending Node
14 23:40 FULL MOON
19 22 Mercury at Greatest Elong: 26.8°E
21 15:46 Moon at Apogee: 404358 km
22 22:02 LAST QUARTER MOON
25 08:28 Pleiades 2.1°N of Moon
26 00 Mercury at Aphelion
26 05:51 Mercury 2.1°S of Regulus
27 05:03 Moon at Descending Node
27 09:52 Mars 0.5°N of Moon: Occn.
28 07 Delta-Aquarid Meteor Shower
30 11:40 NEW MOON
Aug 01 04:20 Mercury 1.5°N of Moon
02 13:59 Moon at Perigee: 365756 km
04 20:08 Spica 2.4°N of Moon
06 04:08 FIRST QUARTER MOON
08 00:32 Antares 3.5°S of Moon
08 23:35 Moon at Ascending Node
09 01 Venus at Perihelion
12 23 Perseid Meteor Shower
13 11:58 FULL MOON
16 05 Venus at Superior Conjunction
16 18 Mercury at Inferior Conjunction
18 09:23 Moon at Apogee: 405161 km
21 14:55 LAST QUARTER MOON
21 16:40 Pleiades 2.3°N of Moon
22 15 Neptune at Opposition
23 10:23 Moon at Descending Node
25 06:36 Mars 2.7°N of Moon
27 18:07 Mercury 2.6°N of Moon
28 20:04 NEW MOON
30 10:35 Moon at Perigee: 360858 km
Sep 01 03:06 Spica 2.2°N of Moon
02 23 Mercury at Greatest Elong: 18.1°W
04 06:00 Antares 3.7°S of Moon
04 10:39 FIRST QUARTER MOON
05 00:36 Moon at Ascending Node
08 00 Mercury at Perihelion
08 19:18 Mercury 0.6°N of Regulus
12 02:27 FULL MOON
14 23:23 Moon at Apogee: 406068 km
17 23:46 Pleiades 2.5°N of Moon
19 12:38 Moon at Descending Node
20 06:39 LAST QUARTER MOON
23 01:23 Mars 4.8°N of Moon
23 02:05 Autumnal Equinox
25 17 Uranus at Opposition
27 04:09 NEW MOON
27 18:01 Moon at Perigee: 357556 km
28 12:34 Spica 2.1°N of Moon
28 13 Mercury at Superior Conjunction
Oct 01 13:04 Antares 3.9°S of Moon
02 02:09 Moon at Ascending Node
03 20:15 FIRST QUARTER MOON
11 19:06 FULL MOON
12 04:43 Moon at Apogee: 406435 km
13 14 Saturn in Conjunction with Sun
15 05:49 Pleiades 2.7°N of Moon
16 14:01 Moon at Descending Node
19 20:30 LAST QUARTER MOON
21 15 Orionid Meteor Shower
26 05:26 Moon at Perigee: 357051 km
26 12:56 NEW MOON
27 19:14 Mercury 0.2°N of Moon: Occn.
27 22:11 Venus 1.8°N of Moon
28 18 Jupiter at Opposition
28 22:37 Antares 4.1°S of Moon
29 07:59 Moon at Ascending Node
Nov 01 13 Mercury 2.0°S of Venus
02 09:38 FIRST QUARTER MOON
05 15 S Taurid Meteor Shower
08 06:20 Moon at Apogee: 406177 km
10 00:51 Venus 3.8°N of Antares
10 01:27 Mercury 1.9°N of Antares
10 11:21 Mars 1.3°N of Regulus
10 13:16 FULL MOON
11 04:32 Saturn 4.0°N of Spica
11 11:43 Pleiades 2.8°N of Moon
12 15 N Taurid Meteor Shower
12 17:35 Moon at Descending Node
13 01 Mercury 2.0°S of Venus
14 02 Mercury at Greatest Elong: 22.7°E
17 21 Leonid Meteor Shower
18 08:09 LAST QUARTER MOON
22 10:21 Spica 2.1°N of Moon
23 16:24 Moon at Perigee: 359692 km
24 23:10 NEW MOON
24 23:20 Partial Solar Eclipse; mag=0.905
25 18:02 Moon at Ascending Node
26 02:48 Mercury 1.7°S of Moon
26 21:29 Venus 2.8°S of Moon
Dec 02 02:52 FIRST QUARTER MOON
04 02 Mercury at Inferior Conjunction
04 23 Mercury at Perihelion
05 18:13 Moon at Apogee: 405414 km
08 18:26 Pleiades 2.8°N of Moon
10 00:04 Moon at Descending Node
10 07:32 Total Lunar Eclipse; mag=1.106
10 07:36 FULL MOON
14 10 Geminid Meteor Shower
17 17:48 LAST QUARTER MOON
19 18:37 Spica 2.1°N of Moon
21 19:56 Moon at Perigee: 364801 km
21 22:30 Winter Solstice
22 19 Ursid Meteor Shower
22 20 Mercury at Greatest Elong: 21.8°W
22 20:05 Antares 4.1°S of Moon
22 20:50 Mercury 2.6°N of Moon
23 04:36 Moon at Ascending Node
24 11:06 NEW MOON
|
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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
2011 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.
| 2011 Phases of the Moon | |||
| Mountain Standard Time | |||
| New Moon | First Quarter | Full Moon | Last Quarter |
| Jan 04 02:03 P | Jan 12 04:31 | Jan 19 14:21 | Jan 26 05:57 |
| Feb 02 19:31 | Feb 11 00:18 | Feb 18 01:36 | Feb 24 16:26 |
| Mar 04 13:46 | Mar 12 16:45 | Mar 19 11:10 | Mar 26 05:07 |
| Apr 03 07:32 | Apr 11 05:05 | Apr 17 19:44 | Apr 24 19:47 |
| May 02 23:51 | May 10 13:33 | May 17 04:09 | May 24 11:52 |
| Jun 01 14:03 P | Jun 08 19:11 | Jun 15 13:13 t | Jun 23 04:48 |
| Jul 01 01:54 P | Jul 07 23:29 | Jul 14 23:40 | Jul 22 22:02 |
| Jul 30 11:40 | Aug 06 04:08 | Aug 13 11:58 | Aug 21 14:55 |
| Aug 28 20:04 | Sep 04 10:39 | Sep 12 02:27 | Sep 20 06:39 |
| Sep 27 04:09 | Oct 03 20:15 | Oct 11 19:06 | Oct 19 20:30 |
| Oct 26 12:56 | Nov 02 09:38 | Nov 10 13:16 | Nov 18 08:09 |
| Nov 24 23:10 P | Dec 02 02:52 | Dec 10 07:36 t | Dec 17 17:48 |
| Dec 24 11:06 | - | - | - |
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: 2011 to 2020
The Americas
Below are links to sky event almanacs from 2011 to 2020 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 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | |||||
| 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 | |||||
- 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
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)