2011 Sky Event Almanac
Central Standard Time
The following table gives the date and time of the important astronomical events for the year. The times listed are for Central Standard Time (Coordinated Universal Time − 6 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 | ||||||||
| Central Standard Time | ||||||||
| January - June | July - December | |||||||
Date CST Event
(h:m)
Jan 01 12:07 Antares 2.5°S of Moon
02 08:32 Mercury 3.8°N of Moon
03 06:48 Moon at Ascending Node
03 13 Earth at Perihelion: 0.98334 AU
03 19 Quadrantid Meteor Shower
04 02:51 Partial Solar Eclipse; mag=0.858
04 03:03 NEW MOON
08 09 Venus at Greatest Elong: 47.0°W
09 08 Mercury at Greatest Elong: 23.3°W
09 23:38 Moon at Apogee: 404976 km
12 05:31 FIRST QUARTER MOON
15 06:39 Pleiades 1.3°N of Moon
17 18:06 Moon at Descending Node
19 15:21 FULL MOON
21 18:10 Moon at Perigee: 362793 km
25 11:38 Spica 3.0°N of Moon
26 06:57 LAST QUARTER MOON
28 17:53 Antares 2.6°S of Moon
29 21:36 Venus 3.5°N of Moon
30 12:29 Moon at Ascending Node
31 03 Mercury at Aphelion
Feb 01 12:14 Mercury 3.6°S of Moon
02 20:31 NEW MOON
04 11 Mars in Conjunction with Sun
06 17:13 Moon at Apogee: 405924 km
11 01:18 FIRST QUARTER MOON
11 15:32 Pleiades 1.4°N of Moon
14 02:14 Moon at Descending Node
17 03 Neptune in Conjunction with Sun
18 02:36 FULL MOON
19 01:27 Moon at Perigee: 358247 km
21 19:02 Spica 2.8°N of Moon
24 17:26 LAST QUARTER MOON
24 23:26 Antares 2.8°S of Moon
25 02 Mercury at Superior Conjunction
26 14:19 Moon at Ascending Node
28 21:40 Venus 1.6°S of Moon
Mar 04 14:46 NEW MOON
06 01:50 Moon at Apogee: 406584 km
09 08 Mars at Perihelion: 1.38138 AU
10 22:35 Pleiades 1.7°N of Moon
12 17:45 FIRST QUARTER MOON
13 05:55 Moon at Descending Node
15 14 Mercury 2.0°N of Jupiter
16 02 Mercury at Perihelion
17 11 Jupiter at Perihelion: 4.94839 AU
19 12:10 FULL MOON
19 13:09 Moon at Perigee: 356578 km
20 17:21 Vernal Equinox
21 05:00 Spica 2.6°N of Moon
21 06 Uranus in Conjunction with Sun
22 19 Mercury at Greatest Elong: 18.6°E
24 06:48 Antares 3.0°S of Moon
25 15:09 Moon at Ascending Node
26 06:07 LAST QUARTER MOON
Apr 02 03:00 Moon at Apogee: 406656 km
03 08:32 NEW MOON
03 17 Saturn at Opposition
06 09 Jupiter in Conjunction with Sun
07 04:19 Pleiades 1.9°N of Moon
09 06:48 Moon at Descending Node
09 13 Mercury at Inferior Conjunction
11 06:05 FIRST QUARTER MOON
16 23:59 Moon at Perigee: 358088 km
17 16:04 Spica 2.5°N of Moon
17 20:44 FULL MOON
18 18 Venus at Aphelion
19 12 Mercury 0.6°N of Mars
20 16:21 Antares 3.2°S of Moon
21 19:05 Moon at Ascending Node
22 17 Lyrid Meteor Shower
24 20:47 LAST QUARTER MOON
29 12:02 Moon at Apogee: 406043 km
30 22 Mars 0.4°N of Jupiter
May 03 00:51 NEW MOON
04 10:05 Pleiades 2.0°N of Moon
05 06 Eta-Aquarid Meteor Shower
06 08:54 Moon at Descending Node
07 13 Mercury at Greatest Elong: 26.6°W
07 23 Mercury 1.4°S of Venus
10 14:33 FIRST QUARTER MOON
11 09 Venus 0.6°S of Jupiter
11 14 Mercury 2.1°S of Jupiter
15 02:08 Spica 2.6°N of Moon
15 05:18 Moon at Perigee: 362133 km
17 05:09 FULL MOON
18 01 Mercury 1.4°S of Venus
18 02:46 Antares 3.3°S of Moon
19 03:03 Moon at Ascending Node
21 02 Mercury 2.1°S of Mars
23 03 Venus 1.0°S of Mars
24 12:52 LAST QUARTER MOON
27 03:58 Moon at Apogee: 405006 km
30 14:04 Mars 3.8°S of Moon
30 22:00 Venus 4.4°S of Moon
Jun 01 15:03 NEW MOON
01 15:16 Partial Solar Eclipse; mag=0.601
02 14:21 Moon at Descending Node
08 20:11 FIRST QUARTER MOON
11 09:57 Spica 2.6°N of Moon
11 19:42 Moon at Perigee: 367188 km
12 02 Mercury at Perihelion
12 17 Mercury at Superior Conjunction
14 12:17 Antares 3.3°S of Moon
15 12:35 Moon at Ascending Node
15 14:13 Total Lunar Eclipse; mag=1.700
15 14:13 FULL MOON
17 06:15 Venus 4.6°N of Aldebaran
20 19:24 Mars 4.2°S of Pleiades
21 11:16 Summer Solstice
23 05:48 LAST QUARTER MOON
23 22:13 Moon at Apogee: 404275 km
28 00:52 Pleiades 2.0°N of Moon
28 01:40 Mercury 4.7°S of Pollux
28 12:59 Mars 1.7°S of Moon
29 22:14 Moon at Descending Node
|
Date CST Event
(h:m)
Jul 01 02:38 Partial Solar Eclipse; mag=0.097
01 02:54 NEW MOON
04 09 Earth at Aphelion: 1.01674 AU
07 08:04 Moon at Perigee: 369566 km
08 00:29 FIRST QUARTER MOON
08 15:44 Spica 2.6°N of Moon
11 19:48 Antares 3.3°S of Moon
12 20:27 Moon at Ascending Node
15 00:40 FULL MOON
19 23 Mercury at Greatest Elong: 26.8°E
21 16:46 Moon at Apogee: 404358 km
22 23:02 LAST QUARTER MOON
25 09:28 Pleiades 2.1°N of Moon
26 01 Mercury at Aphelion
26 06:51 Mercury 2.1°S of Regulus
27 06:03 Moon at Descending Node
27 10:52 Mars 0.5°N of Moon: Occn.
28 08 Delta-Aquarid Meteor Shower
30 12:40 NEW MOON
Aug 01 05:20 Mercury 1.5°N of Moon
02 14:59 Moon at Perigee: 365756 km
04 21:08 Spica 2.4°N of Moon
06 05:08 FIRST QUARTER MOON
08 01:32 Antares 3.5°S of Moon
09 00:35 Moon at Ascending Node
09 02 Venus at Perihelion
13 00 Perseid Meteor Shower
13 12:58 FULL MOON
16 06 Venus at Superior Conjunction
16 19 Mercury at Inferior Conjunction
18 10:23 Moon at Apogee: 405161 km
21 15:55 LAST QUARTER MOON
21 17:40 Pleiades 2.3°N of Moon
22 16 Neptune at Opposition
23 11:23 Moon at Descending Node
25 07:36 Mars 2.7°N of Moon
27 19:07 Mercury 2.6°N of Moon
28 21:04 NEW MOON
30 11:35 Moon at Perigee: 360858 km
Sep 01 04:06 Spica 2.2°N of Moon
03 00 Mercury at Greatest Elong: 18.1°W
04 07:00 Antares 3.7°S of Moon
04 11:39 FIRST QUARTER MOON
05 01:36 Moon at Ascending Node
08 01 Mercury at Perihelion
08 20:18 Mercury 0.6°N of Regulus
12 03:27 FULL MOON
15 00:23 Moon at Apogee: 406068 km
18 00:46 Pleiades 2.5°N of Moon
19 13:38 Moon at Descending Node
20 07:39 LAST QUARTER MOON
23 02:23 Mars 4.8°N of Moon
23 03:05 Autumnal Equinox
25 18 Uranus at Opposition
27 05:09 NEW MOON
27 19:01 Moon at Perigee: 357556 km
28 13:34 Spica 2.1°N of Moon
28 14 Mercury at Superior Conjunction
Oct 01 14:04 Antares 3.9°S of Moon
02 03:09 Moon at Ascending Node
03 21:15 FIRST QUARTER MOON
11 20:06 FULL MOON
12 05:43 Moon at Apogee: 406435 km
13 15 Saturn in Conjunction with Sun
15 06:49 Pleiades 2.7°N of Moon
16 15:01 Moon at Descending Node
19 21:30 LAST QUARTER MOON
21 16 Orionid Meteor Shower
26 06:26 Moon at Perigee: 357051 km
26 13:56 NEW MOON
27 20:14 Mercury 0.2°N of Moon: Occn.
27 23:11 Venus 1.8°N of Moon
28 19 Jupiter at Opposition
28 23:37 Antares 4.1°S of Moon
29 08:59 Moon at Ascending Node
Nov 01 14 Mercury 2.0°S of Venus
02 10:38 FIRST QUARTER MOON
05 16 S Taurid Meteor Shower
08 07:20 Moon at Apogee: 406177 km
10 01:51 Venus 3.8°N of Antares
10 02:27 Mercury 1.9°N of Antares
10 12:21 Mars 1.3°N of Regulus
10 14:16 FULL MOON
11 05:32 Saturn 4.0°N of Spica
11 12:43 Pleiades 2.8°N of Moon
12 16 N Taurid Meteor Shower
12 18:35 Moon at Descending Node
13 02 Mercury 2.0°S of Venus
14 03 Mercury at Greatest Elong: 22.7°E
17 22 Leonid Meteor Shower
18 09:09 LAST QUARTER MOON
22 11:21 Spica 2.1°N of Moon
23 17:24 Moon at Perigee: 359692 km
25 00:10 NEW MOON
25 00:20 Partial Solar Eclipse; mag=0.905
25 19:02 Moon at Ascending Node
26 03:48 Mercury 1.7°S of Moon
26 22:29 Venus 2.8°S of Moon
Dec 02 03:52 FIRST QUARTER MOON
04 03 Mercury at Inferior Conjunction
05 00 Mercury at Perihelion
05 19:13 Moon at Apogee: 405414 km
08 19:26 Pleiades 2.8°N of Moon
10 01:04 Moon at Descending Node
10 08:32 Total Lunar Eclipse; mag=1.106
10 08:36 FULL MOON
14 11 Geminid Meteor Shower
17 18:48 LAST QUARTER MOON
19 19:37 Spica 2.1°N of Moon
21 20:56 Moon at Perigee: 364801 km
21 23:30 Winter Solstice
22 20 Ursid Meteor Shower
22 21 Mercury at Greatest Elong: 21.8°W
22 21:05 Antares 4.1°S of Moon
22 21:50 Mercury 2.6°N of Moon
23 05:36 Moon at Ascending Node
24 12:06 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
Central Standard Time
The following table gives the date and time of the Moon's phases for the year. The times listed are for Central Standard Time (Coordinated Universal Time − 6 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 | |||
| Central Standard Time | |||
| New Moon | First Quarter | Full Moon | Last Quarter |
| Jan 04 03:03 P | Jan 12 05:31 | Jan 19 15:21 | Jan 26 06:57 |
| Feb 02 20:31 | Feb 11 01:18 | Feb 18 02:36 | Feb 24 17:26 |
| Mar 04 14:46 | Mar 12 17:45 | Mar 19 12:10 | Mar 26 06:07 |
| Apr 03 08:32 | Apr 11 06:05 | Apr 17 20:44 | Apr 24 20:47 |
| May 03 00:51 | May 10 14:33 | May 17 05:09 | May 24 12:52 |
| Jun 01 15:03 P | Jun 08 20:11 | Jun 15 14:13 t | Jun 23 05:48 |
| Jul 01 02:54 P | Jul 08 00:29 | Jul 15 00:40 | Jul 22 23:02 |
| Jul 30 12:40 | Aug 06 05:08 | Aug 13 12:58 | Aug 21 15:55 |
| Aug 28 21:04 | Sep 04 11:39 | Sep 12 03:27 | Sep 20 07:39 |
| Sep 27 05:09 | Oct 03 21:15 | Oct 11 20:06 | Oct 19 21:30 |
| Oct 26 13:56 | Nov 02 10:38 | Nov 10 14:16 | Nov 18 09:09 |
| Nov 25 00:10 P | Dec 02 03:52 | Dec 10 08:36 t | Dec 17 18:48 |
| Dec 24 12:06 | - | - | - |
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)