2011 Sky Event Almanac
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 (Coordinated Universal Time − 4 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 | ||||||||
| Atlantic Standard Time | ||||||||
| January - June | July - December | |||||||
Date AST Event
(h:m)
Jan 01 14:07 Antares 2.5°S of Moon
02 10:32 Mercury 3.8°N of Moon
03 08:48 Moon at Ascending Node
03 15 Earth at Perihelion: 0.98334 AU
03 21 Quadrantid Meteor Shower
04 04:51 Partial Solar Eclipse; mag=0.858
04 05:03 NEW MOON
08 11 Venus at Greatest Elong: 47.0°W
09 10 Mercury at Greatest Elong: 23.3°W
10 01:38 Moon at Apogee: 404976 km
12 07:31 FIRST QUARTER MOON
15 08:39 Pleiades 1.3°N of Moon
17 20:06 Moon at Descending Node
19 17:21 FULL MOON
21 20:10 Moon at Perigee: 362793 km
25 13:38 Spica 3.0°N of Moon
26 08:57 LAST QUARTER MOON
28 19:53 Antares 2.6°S of Moon
29 23:36 Venus 3.5°N of Moon
30 14:29 Moon at Ascending Node
31 05 Mercury at Aphelion
Feb 01 14:14 Mercury 3.6°S of Moon
02 22:31 NEW MOON
04 13 Mars in Conjunction with Sun
06 19:13 Moon at Apogee: 405924 km
11 03:18 FIRST QUARTER MOON
11 17:32 Pleiades 1.4°N of Moon
14 04:14 Moon at Descending Node
17 05 Neptune in Conjunction with Sun
18 04:36 FULL MOON
19 03:27 Moon at Perigee: 358247 km
21 21:02 Spica 2.8°N of Moon
24 19:26 LAST QUARTER MOON
25 01:26 Antares 2.8°S of Moon
25 04 Mercury at Superior Conjunction
26 16:19 Moon at Ascending Node
28 23:40 Venus 1.6°S of Moon
Mar 04 16:46 NEW MOON
06 03:50 Moon at Apogee: 406584 km
09 10 Mars at Perihelion: 1.38138 AU
11 00:35 Pleiades 1.7°N of Moon
12 19:45 FIRST QUARTER MOON
13 07:55 Moon at Descending Node
15 16 Mercury 2.0°N of Jupiter
16 04 Mercury at Perihelion
17 13 Jupiter at Perihelion: 4.94839 AU
19 14:10 FULL MOON
19 15:09 Moon at Perigee: 356578 km
20 19:21 Vernal Equinox
21 07:00 Spica 2.6°N of Moon
21 08 Uranus in Conjunction with Sun
22 21 Mercury at Greatest Elong: 18.6°E
24 08:48 Antares 3.0°S of Moon
25 17:09 Moon at Ascending Node
26 08:07 LAST QUARTER MOON
Apr 02 05:00 Moon at Apogee: 406656 km
03 10:32 NEW MOON
03 19 Saturn at Opposition
06 11 Jupiter in Conjunction with Sun
07 06:19 Pleiades 1.9°N of Moon
09 08:48 Moon at Descending Node
09 15 Mercury at Inferior Conjunction
11 08:05 FIRST QUARTER MOON
17 01:59 Moon at Perigee: 358088 km
17 18:04 Spica 2.5°N of Moon
17 22:44 FULL MOON
18 20 Venus at Aphelion
19 14 Mercury 0.6°N of Mars
20 18:21 Antares 3.2°S of Moon
21 21:05 Moon at Ascending Node
22 19 Lyrid Meteor Shower
24 22:47 LAST QUARTER MOON
29 14:02 Moon at Apogee: 406043 km
May 01 00 Mars 0.4°N of Jupiter
03 02:51 NEW MOON
04 12:05 Pleiades 2.0°N of Moon
05 08 Eta-Aquarid Meteor Shower
06 10:54 Moon at Descending Node
07 15 Mercury at Greatest Elong: 26.6°W
08 01 Mercury 1.4°S of Venus
10 16:33 FIRST QUARTER MOON
11 11 Venus 0.6°S of Jupiter
11 16 Mercury 2.1°S of Jupiter
15 04:08 Spica 2.6°N of Moon
15 07:18 Moon at Perigee: 362133 km
17 07:09 FULL MOON
18 03 Mercury 1.4°S of Venus
18 04:46 Antares 3.3°S of Moon
19 05:03 Moon at Ascending Node
21 04 Mercury 2.1°S of Mars
23 05 Venus 1.0°S of Mars
24 14:52 LAST QUARTER MOON
27 05:58 Moon at Apogee: 405006 km
30 16:04 Mars 3.8°S of Moon
31 00:00 Venus 4.4°S of Moon
Jun 01 17:03 NEW MOON
01 17:16 Partial Solar Eclipse; mag=0.601
02 16:21 Moon at Descending Node
08 22:11 FIRST QUARTER MOON
11 11:57 Spica 2.6°N of Moon
11 21:42 Moon at Perigee: 367188 km
12 04 Mercury at Perihelion
12 19 Mercury at Superior Conjunction
14 14:17 Antares 3.3°S of Moon
15 14:35 Moon at Ascending Node
15 16:13 Total Lunar Eclipse; mag=1.700
15 16:13 FULL MOON
17 08:15 Venus 4.6°N of Aldebaran
20 21:24 Mars 4.2°S of Pleiades
21 13:16 Summer Solstice
23 07:48 LAST QUARTER MOON
24 00:13 Moon at Apogee: 404275 km
28 02:52 Pleiades 2.0°N of Moon
28 03:40 Mercury 4.7°S of Pollux
28 14:59 Mars 1.7°S of Moon
30 00:14 Moon at Descending Node
|
Date AST Event
(h:m)
Jul 01 04:38 Partial Solar Eclipse; mag=0.097
01 04:54 NEW MOON
04 11 Earth at Aphelion: 1.01674 AU
07 10:04 Moon at Perigee: 369566 km
08 02:29 FIRST QUARTER MOON
08 17:44 Spica 2.6°N of Moon
11 21:48 Antares 3.3°S of Moon
12 22:27 Moon at Ascending Node
15 02:40 FULL MOON
20 01 Mercury at Greatest Elong: 26.8°E
21 18:46 Moon at Apogee: 404358 km
23 01:02 LAST QUARTER MOON
25 11:28 Pleiades 2.1°N of Moon
26 03 Mercury at Aphelion
26 08:51 Mercury 2.1°S of Regulus
27 08:03 Moon at Descending Node
27 12:52 Mars 0.5°N of Moon: Occn.
28 10 Delta-Aquarid Meteor Shower
30 14:40 NEW MOON
Aug 01 07:20 Mercury 1.5°N of Moon
02 16:59 Moon at Perigee: 365756 km
04 23:08 Spica 2.4°N of Moon
06 07:08 FIRST QUARTER MOON
08 03:32 Antares 3.5°S of Moon
09 02:35 Moon at Ascending Node
09 04 Venus at Perihelion
13 02 Perseid Meteor Shower
13 14:58 FULL MOON
16 08 Venus at Superior Conjunction
16 21 Mercury at Inferior Conjunction
18 12:23 Moon at Apogee: 405161 km
21 17:55 LAST QUARTER MOON
21 19:40 Pleiades 2.3°N of Moon
22 18 Neptune at Opposition
23 13:23 Moon at Descending Node
25 09:36 Mars 2.7°N of Moon
27 21:07 Mercury 2.6°N of Moon
28 23:04 NEW MOON
30 13:35 Moon at Perigee: 360858 km
Sep 01 06:06 Spica 2.2°N of Moon
03 02 Mercury at Greatest Elong: 18.1°W
04 09:00 Antares 3.7°S of Moon
04 13:39 FIRST QUARTER MOON
05 03:36 Moon at Ascending Node
08 03 Mercury at Perihelion
08 22:18 Mercury 0.6°N of Regulus
12 05:27 FULL MOON
15 02:23 Moon at Apogee: 406068 km
18 02:46 Pleiades 2.5°N of Moon
19 15:38 Moon at Descending Node
20 09:39 LAST QUARTER MOON
23 04:23 Mars 4.8°N of Moon
23 05:05 Autumnal Equinox
25 20 Uranus at Opposition
27 07:09 NEW MOON
27 21:01 Moon at Perigee: 357556 km
28 15:34 Spica 2.1°N of Moon
28 16 Mercury at Superior Conjunction
Oct 01 16:04 Antares 3.9°S of Moon
02 05:09 Moon at Ascending Node
03 23:15 FIRST QUARTER MOON
11 22:06 FULL MOON
12 07:43 Moon at Apogee: 406435 km
13 17 Saturn in Conjunction with Sun
15 08:49 Pleiades 2.7°N of Moon
16 17:01 Moon at Descending Node
19 23:30 LAST QUARTER MOON
21 18 Orionid Meteor Shower
26 08:26 Moon at Perigee: 357051 km
26 15:56 NEW MOON
27 22:14 Mercury 0.2°N of Moon: Occn.
28 01:11 Venus 1.8°N of Moon
28 21 Jupiter at Opposition
29 01:37 Antares 4.1°S of Moon
29 10:59 Moon at Ascending Node
Nov 01 16 Mercury 2.0°S of Venus
02 12:38 FIRST QUARTER MOON
05 18 S Taurid Meteor Shower
08 09:20 Moon at Apogee: 406177 km
10 03:51 Venus 3.8°N of Antares
10 04:27 Mercury 1.9°N of Antares
10 14:21 Mars 1.3°N of Regulus
10 16:16 FULL MOON
11 07:32 Saturn 4.0°N of Spica
11 14:43 Pleiades 2.8°N of Moon
12 18 N Taurid Meteor Shower
12 20:35 Moon at Descending Node
13 04 Mercury 2.0°S of Venus
14 05 Mercury at Greatest Elong: 22.7°E
18 00 Leonid Meteor Shower
18 11:09 LAST QUARTER MOON
22 13:21 Spica 2.1°N of Moon
23 19:24 Moon at Perigee: 359692 km
25 02:10 NEW MOON
25 02:20 Partial Solar Eclipse; mag=0.905
25 21:02 Moon at Ascending Node
26 05:48 Mercury 1.7°S of Moon
27 00:29 Venus 2.8°S of Moon
Dec 02 05:52 FIRST QUARTER MOON
04 05 Mercury at Inferior Conjunction
05 02 Mercury at Perihelion
05 21:13 Moon at Apogee: 405414 km
08 21:26 Pleiades 2.8°N of Moon
10 03:04 Moon at Descending Node
10 10:32 Total Lunar Eclipse; mag=1.106
10 10:36 FULL MOON
14 13 Geminid Meteor Shower
17 20:48 LAST QUARTER MOON
19 21:37 Spica 2.1°N of Moon
21 22:56 Moon at Perigee: 364801 km
22 01:30 Winter Solstice
22 22 Ursid Meteor Shower
22 23 Mercury at Greatest Elong: 21.8°W
22 23:05 Antares 4.1°S of Moon
22 23:50 Mercury 2.6°N of Moon
23 07:36 Moon at Ascending Node
24 14:06 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
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 (Coordinated Universal Time − 4 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 | |||
| Atlantic Standard Time | |||
| New Moon | First Quarter | Full Moon | Last Quarter |
| Jan 04 05:03 P | Jan 12 07:31 | Jan 19 17:21 | Jan 26 08:57 |
| Feb 02 22:31 | Feb 11 03:18 | Feb 18 04:36 | Feb 24 19:26 |
| Mar 04 16:46 | Mar 12 19:45 | Mar 19 14:10 | Mar 26 08:07 |
| Apr 03 10:32 | Apr 11 08:05 | Apr 17 22:44 | Apr 24 22:47 |
| May 03 02:51 | May 10 16:33 | May 17 07:09 | May 24 14:52 |
| Jun 01 17:03 P | Jun 08 22:11 | Jun 15 16:13 t | Jun 23 07:48 |
| Jul 01 04:54 P | Jul 08 02:29 | Jul 15 02:40 | Jul 23 01:02 |
| Jul 30 14:40 | Aug 06 07:08 | Aug 13 14:58 | Aug 21 17:55 |
| Aug 28 23:04 | Sep 04 13:39 | Sep 12 05:27 | Sep 20 09:39 |
| Sep 27 07:09 | Oct 03 23:15 | Oct 11 22:06 | Oct 19 23:30 |
| Oct 26 15:56 | Nov 02 12:38 | Nov 10 16:16 | Nov 18 11:09 |
| Nov 25 02:10 P | Dec 02 05:52 | Dec 10 10:36 t | Dec 17 20:48 |
| Dec 24 14:06 | - | - | - |
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)