2011 Sky Event Almanac
Eastern Standard Time
The following table gives the date and time of the important astronomical events for the year. The times listed are for Eastern Standard Time (Coordinated Universal Time − 5 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 | ||||||||
| Eastern Standard Time | ||||||||
| January - June | July - December | |||||||
Date EST Event
(h:m)
Jan 01 13:07 Antares 2.5°S of Moon
02 09:32 Mercury 3.8°N of Moon
03 07:48 Moon at Ascending Node
03 14 Earth at Perihelion: 0.98334 AU
03 20 Quadrantid Meteor Shower
04 03:51 Partial Solar Eclipse; mag=0.858
04 04:03 NEW MOON
08 10 Venus at Greatest Elong: 47.0°W
09 09 Mercury at Greatest Elong: 23.3°W
10 00:38 Moon at Apogee: 404976 km
12 06:31 FIRST QUARTER MOON
15 07:39 Pleiades 1.3°N of Moon
17 19:06 Moon at Descending Node
19 16:21 FULL MOON
21 19:10 Moon at Perigee: 362793 km
25 12:38 Spica 3.0°N of Moon
26 07:57 LAST QUARTER MOON
28 18:53 Antares 2.6°S of Moon
29 22:36 Venus 3.5°N of Moon
30 13:29 Moon at Ascending Node
31 04 Mercury at Aphelion
Feb 01 13:14 Mercury 3.6°S of Moon
02 21:31 NEW MOON
04 12 Mars in Conjunction with Sun
06 18:13 Moon at Apogee: 405924 km
11 02:18 FIRST QUARTER MOON
11 16:32 Pleiades 1.4°N of Moon
14 03:14 Moon at Descending Node
17 04 Neptune in Conjunction with Sun
18 03:36 FULL MOON
19 02:27 Moon at Perigee: 358247 km
21 20:02 Spica 2.8°N of Moon
24 18:26 LAST QUARTER MOON
25 00:26 Antares 2.8°S of Moon
25 03 Mercury at Superior Conjunction
26 15:19 Moon at Ascending Node
28 22:40 Venus 1.6°S of Moon
Mar 04 15:46 NEW MOON
06 02:50 Moon at Apogee: 406584 km
09 09 Mars at Perihelion: 1.38138 AU
10 23:35 Pleiades 1.7°N of Moon
12 18:45 FIRST QUARTER MOON
13 06:55 Moon at Descending Node
15 15 Mercury 2.0°N of Jupiter
16 03 Mercury at Perihelion
17 12 Jupiter at Perihelion: 4.94839 AU
19 13:10 FULL MOON
19 14:09 Moon at Perigee: 356578 km
20 18:21 Vernal Equinox
21 06:00 Spica 2.6°N of Moon
21 07 Uranus in Conjunction with Sun
22 20 Mercury at Greatest Elong: 18.6°E
24 07:48 Antares 3.0°S of Moon
25 16:09 Moon at Ascending Node
26 07:07 LAST QUARTER MOON
Apr 02 04:00 Moon at Apogee: 406656 km
03 09:32 NEW MOON
03 18 Saturn at Opposition
06 10 Jupiter in Conjunction with Sun
07 05:19 Pleiades 1.9°N of Moon
09 07:48 Moon at Descending Node
09 14 Mercury at Inferior Conjunction
11 07:05 FIRST QUARTER MOON
17 00:59 Moon at Perigee: 358088 km
17 17:04 Spica 2.5°N of Moon
17 21:44 FULL MOON
18 19 Venus at Aphelion
19 13 Mercury 0.6°N of Mars
20 17:21 Antares 3.2°S of Moon
21 20:05 Moon at Ascending Node
22 18 Lyrid Meteor Shower
24 21:47 LAST QUARTER MOON
29 13:02 Moon at Apogee: 406043 km
30 23 Mars 0.4°N of Jupiter
May 03 01:51 NEW MOON
04 11:05 Pleiades 2.0°N of Moon
05 07 Eta-Aquarid Meteor Shower
06 09:54 Moon at Descending Node
07 14 Mercury at Greatest Elong: 26.6°W
08 00 Mercury 1.4°S of Venus
10 15:33 FIRST QUARTER MOON
11 10 Venus 0.6°S of Jupiter
11 15 Mercury 2.1°S of Jupiter
15 03:08 Spica 2.6°N of Moon
15 06:18 Moon at Perigee: 362133 km
17 06:09 FULL MOON
18 02 Mercury 1.4°S of Venus
18 03:46 Antares 3.3°S of Moon
19 04:03 Moon at Ascending Node
21 03 Mercury 2.1°S of Mars
23 04 Venus 1.0°S of Mars
24 13:52 LAST QUARTER MOON
27 04:58 Moon at Apogee: 405006 km
30 15:04 Mars 3.8°S of Moon
30 23:00 Venus 4.4°S of Moon
Jun 01 16:03 NEW MOON
01 16:16 Partial Solar Eclipse; mag=0.601
02 15:21 Moon at Descending Node
08 21:11 FIRST QUARTER MOON
11 10:57 Spica 2.6°N of Moon
11 20:42 Moon at Perigee: 367188 km
12 03 Mercury at Perihelion
12 18 Mercury at Superior Conjunction
14 13:17 Antares 3.3°S of Moon
15 13:35 Moon at Ascending Node
15 15:13 Total Lunar Eclipse; mag=1.700
15 15:13 FULL MOON
17 07:15 Venus 4.6°N of Aldebaran
20 20:24 Mars 4.2°S of Pleiades
21 12:16 Summer Solstice
23 06:48 LAST QUARTER MOON
23 23:13 Moon at Apogee: 404275 km
28 01:52 Pleiades 2.0°N of Moon
28 02:40 Mercury 4.7°S of Pollux
28 13:59 Mars 1.7°S of Moon
29 23:14 Moon at Descending Node
|
Date EST Event
(h:m)
Jul 01 03:38 Partial Solar Eclipse; mag=0.097
01 03:54 NEW MOON
04 10 Earth at Aphelion: 1.01674 AU
07 09:04 Moon at Perigee: 369566 km
08 01:29 FIRST QUARTER MOON
08 16:44 Spica 2.6°N of Moon
11 20:48 Antares 3.3°S of Moon
12 21:27 Moon at Ascending Node
15 01:40 FULL MOON
20 00 Mercury at Greatest Elong: 26.8°E
21 17:46 Moon at Apogee: 404358 km
23 00:02 LAST QUARTER MOON
25 10:28 Pleiades 2.1°N of Moon
26 02 Mercury at Aphelion
26 07:51 Mercury 2.1°S of Regulus
27 07:03 Moon at Descending Node
27 11:52 Mars 0.5°N of Moon: Occn.
28 09 Delta-Aquarid Meteor Shower
30 13:40 NEW MOON
Aug 01 06:20 Mercury 1.5°N of Moon
02 15:59 Moon at Perigee: 365756 km
04 22:08 Spica 2.4°N of Moon
06 06:08 FIRST QUARTER MOON
08 02:32 Antares 3.5°S of Moon
09 01:35 Moon at Ascending Node
09 03 Venus at Perihelion
13 01 Perseid Meteor Shower
13 13:58 FULL MOON
16 07 Venus at Superior Conjunction
16 20 Mercury at Inferior Conjunction
18 11:23 Moon at Apogee: 405161 km
21 16:55 LAST QUARTER MOON
21 18:40 Pleiades 2.3°N of Moon
22 17 Neptune at Opposition
23 12:23 Moon at Descending Node
25 08:36 Mars 2.7°N of Moon
27 20:07 Mercury 2.6°N of Moon
28 22:04 NEW MOON
30 12:35 Moon at Perigee: 360858 km
Sep 01 05:06 Spica 2.2°N of Moon
03 01 Mercury at Greatest Elong: 18.1°W
04 08:00 Antares 3.7°S of Moon
04 12:39 FIRST QUARTER MOON
05 02:36 Moon at Ascending Node
08 02 Mercury at Perihelion
08 21:18 Mercury 0.6°N of Regulus
12 04:27 FULL MOON
15 01:23 Moon at Apogee: 406068 km
18 01:46 Pleiades 2.5°N of Moon
19 14:38 Moon at Descending Node
20 08:39 LAST QUARTER MOON
23 03:23 Mars 4.8°N of Moon
23 04:05 Autumnal Equinox
25 19 Uranus at Opposition
27 06:09 NEW MOON
27 20:01 Moon at Perigee: 357556 km
28 14:34 Spica 2.1°N of Moon
28 15 Mercury at Superior Conjunction
Oct 01 15:04 Antares 3.9°S of Moon
02 04:09 Moon at Ascending Node
03 22:15 FIRST QUARTER MOON
11 21:06 FULL MOON
12 06:43 Moon at Apogee: 406435 km
13 16 Saturn in Conjunction with Sun
15 07:49 Pleiades 2.7°N of Moon
16 16:01 Moon at Descending Node
19 22:30 LAST QUARTER MOON
21 17 Orionid Meteor Shower
26 07:26 Moon at Perigee: 357051 km
26 14:56 NEW MOON
27 21:14 Mercury 0.2°N of Moon: Occn.
28 00:11 Venus 1.8°N of Moon
28 20 Jupiter at Opposition
29 00:37 Antares 4.1°S of Moon
29 09:59 Moon at Ascending Node
Nov 01 15 Mercury 2.0°S of Venus
02 11:38 FIRST QUARTER MOON
05 17 S Taurid Meteor Shower
08 08:20 Moon at Apogee: 406177 km
10 02:51 Venus 3.8°N of Antares
10 03:27 Mercury 1.9°N of Antares
10 13:21 Mars 1.3°N of Regulus
10 15:16 FULL MOON
11 06:32 Saturn 4.0°N of Spica
11 13:43 Pleiades 2.8°N of Moon
12 17 N Taurid Meteor Shower
12 19:35 Moon at Descending Node
13 03 Mercury 2.0°S of Venus
14 04 Mercury at Greatest Elong: 22.7°E
17 23 Leonid Meteor Shower
18 10:09 LAST QUARTER MOON
22 12:21 Spica 2.1°N of Moon
23 18:24 Moon at Perigee: 359692 km
25 01:10 NEW MOON
25 01:20 Partial Solar Eclipse; mag=0.905
25 20:02 Moon at Ascending Node
26 04:48 Mercury 1.7°S of Moon
26 23:29 Venus 2.8°S of Moon
Dec 02 04:52 FIRST QUARTER MOON
04 04 Mercury at Inferior Conjunction
05 01 Mercury at Perihelion
05 20:13 Moon at Apogee: 405414 km
08 20:26 Pleiades 2.8°N of Moon
10 02:04 Moon at Descending Node
10 09:32 Total Lunar Eclipse; mag=1.106
10 09:36 FULL MOON
14 12 Geminid Meteor Shower
17 19:48 LAST QUARTER MOON
19 20:37 Spica 2.1°N of Moon
21 21:56 Moon at Perigee: 364801 km
22 00:30 Winter Solstice
22 21 Ursid Meteor Shower
22 22 Mercury at Greatest Elong: 21.8°W
22 22:05 Antares 4.1°S of Moon
22 22:50 Mercury 2.6°N of Moon
23 06:36 Moon at Ascending Node
24 13:06 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
Eastern Standard Time
The following table gives the date and time of the Moon's phases for the year. The times listed are for Eastern Standard Time (Coordinated Universal Time − 5 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 | |||
| Eastern Standard Time | |||
| New Moon | First Quarter | Full Moon | Last Quarter |
| Jan 04 04:03 P | Jan 12 06:31 | Jan 19 16:21 | Jan 26 07:57 |
| Feb 02 21:31 | Feb 11 02:18 | Feb 18 03:36 | Feb 24 18:26 |
| Mar 04 15:46 | Mar 12 18:45 | Mar 19 13:10 | Mar 26 07:07 |
| Apr 03 09:32 | Apr 11 07:05 | Apr 17 21:44 | Apr 24 21:47 |
| May 03 01:51 | May 10 15:33 | May 17 06:09 | May 24 13:52 |
| Jun 01 16:03 P | Jun 08 21:11 | Jun 15 15:13 t | Jun 23 06:48 |
| Jul 01 03:54 P | Jul 08 01:29 | Jul 15 01:40 | Jul 23 00:02 |
| Jul 30 13:40 | Aug 06 06:08 | Aug 13 13:58 | Aug 21 16:55 |
| Aug 28 22:04 | Sep 04 12:39 | Sep 12 04:27 | Sep 20 08:39 |
| Sep 27 06:09 | Oct 03 22:15 | Oct 11 21:06 | Oct 19 22:30 |
| Oct 26 14:56 | Nov 02 11:38 | Nov 10 15:16 | Nov 18 10:09 |
| Nov 25 01:10 P | Dec 02 04:52 | Dec 10 09:36 t | Dec 17 19:48 |
| Dec 24 13:06 | - | - | - |
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)