2011 Sky Event Almanac
Argentina Time
The following table gives the date and time of the important astronomical events for the year. The times listed are for Argentina Time (Coordinated Universal Time − 3 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 | ||||||||
| Argentina Time | ||||||||
| January - June | July - December | |||||||
Date ART Event
(h:m)
Jan 01 15:07 Antares 2.5°S of Moon
02 11:32 Mercury 3.8°N of Moon
03 09:48 Moon at Ascending Node
03 16 Earth at Perihelion: 0.98334 AU
03 22 Quadrantid Meteor Shower
04 05:51 Partial Solar Eclipse; mag=0.858
04 06:03 NEW MOON
08 12 Venus at Greatest Elong: 47.0°W
09 11 Mercury at Greatest Elong: 23.3°W
10 02:38 Moon at Apogee: 404976 km
12 08:31 FIRST QUARTER MOON
15 09:39 Pleiades 1.3°N of Moon
17 21:06 Moon at Descending Node
19 18:21 FULL MOON
21 21:10 Moon at Perigee: 362793 km
25 14:38 Spica 3.0°N of Moon
26 09:57 LAST QUARTER MOON
28 20:53 Antares 2.6°S of Moon
30 00:36 Venus 3.5°N of Moon
30 15:29 Moon at Ascending Node
31 06 Mercury at Aphelion
Feb 01 15:14 Mercury 3.6°S of Moon
02 23:31 NEW MOON
04 14 Mars in Conjunction with Sun
06 20:13 Moon at Apogee: 405924 km
11 04:18 FIRST QUARTER MOON
11 18:32 Pleiades 1.4°N of Moon
14 05:14 Moon at Descending Node
17 06 Neptune in Conjunction with Sun
18 05:36 FULL MOON
19 04:27 Moon at Perigee: 358247 km
21 22:02 Spica 2.8°N of Moon
24 20:26 LAST QUARTER MOON
25 02:26 Antares 2.8°S of Moon
25 05 Mercury at Superior Conjunction
26 17:19 Moon at Ascending Node
Mar 01 00:40 Venus 1.6°S of Moon
04 17:46 NEW MOON
06 04:50 Moon at Apogee: 406584 km
09 11 Mars at Perihelion: 1.38138 AU
11 01:35 Pleiades 1.7°N of Moon
12 20:45 FIRST QUARTER MOON
13 08:55 Moon at Descending Node
15 17 Mercury 2.0°N of Jupiter
16 05 Mercury at Perihelion
17 14 Jupiter at Perihelion: 4.94839 AU
19 15:10 FULL MOON
19 16:09 Moon at Perigee: 356578 km
20 20:21 Vernal Equinox
21 08:00 Spica 2.6°N of Moon
21 09 Uranus in Conjunction with Sun
22 22 Mercury at Greatest Elong: 18.6°E
24 09:48 Antares 3.0°S of Moon
25 18:09 Moon at Ascending Node
26 09:07 LAST QUARTER MOON
Apr 02 06:00 Moon at Apogee: 406656 km
03 11:32 NEW MOON
03 20 Saturn at Opposition
06 12 Jupiter in Conjunction with Sun
07 07:19 Pleiades 1.9°N of Moon
09 09:48 Moon at Descending Node
09 16 Mercury at Inferior Conjunction
11 09:05 FIRST QUARTER MOON
17 02:59 Moon at Perigee: 358088 km
17 19:04 Spica 2.5°N of Moon
17 23:44 FULL MOON
18 21 Venus at Aphelion
19 15 Mercury 0.6°N of Mars
20 19:21 Antares 3.2°S of Moon
21 22:05 Moon at Ascending Node
22 20 Lyrid Meteor Shower
24 23:47 LAST QUARTER MOON
29 15:02 Moon at Apogee: 406043 km
May 01 01 Mars 0.4°N of Jupiter
03 03:51 NEW MOON
04 13:05 Pleiades 2.0°N of Moon
05 09 Eta-Aquarid Meteor Shower
06 11:54 Moon at Descending Node
07 16 Mercury at Greatest Elong: 26.6°W
08 02 Mercury 1.4°S of Venus
10 17:33 FIRST QUARTER MOON
11 12 Venus 0.6°S of Jupiter
11 17 Mercury 2.1°S of Jupiter
15 05:08 Spica 2.6°N of Moon
15 08:18 Moon at Perigee: 362133 km
17 08:09 FULL MOON
18 04 Mercury 1.4°S of Venus
18 05:46 Antares 3.3°S of Moon
19 06:03 Moon at Ascending Node
21 05 Mercury 2.1°S of Mars
23 06 Venus 1.0°S of Mars
24 15:52 LAST QUARTER MOON
27 06:58 Moon at Apogee: 405006 km
30 17:04 Mars 3.8°S of Moon
31 01:00 Venus 4.4°S of Moon
Jun 01 18:03 NEW MOON
01 18:16 Partial Solar Eclipse; mag=0.601
02 17:21 Moon at Descending Node
08 23:11 FIRST QUARTER MOON
11 12:57 Spica 2.6°N of Moon
11 22:42 Moon at Perigee: 367188 km
12 05 Mercury at Perihelion
12 20 Mercury at Superior Conjunction
14 15:17 Antares 3.3°S of Moon
15 15:35 Moon at Ascending Node
15 17:13 Total Lunar Eclipse; mag=1.700
15 17:13 FULL MOON
17 09:15 Venus 4.6°N of Aldebaran
20 22:24 Mars 4.2°S of Pleiades
21 14:16 Summer Solstice
23 08:48 LAST QUARTER MOON
24 01:13 Moon at Apogee: 404275 km
28 03:52 Pleiades 2.0°N of Moon
28 04:40 Mercury 4.7°S of Pollux
28 15:59 Mars 1.7°S of Moon
30 01:14 Moon at Descending Node
|
Date ART Event
(h:m)
Jul 01 05:38 Partial Solar Eclipse; mag=0.097
01 05:54 NEW MOON
04 12 Earth at Aphelion: 1.01674 AU
07 11:04 Moon at Perigee: 369566 km
08 03:29 FIRST QUARTER MOON
08 18:44 Spica 2.6°N of Moon
11 22:48 Antares 3.3°S of Moon
12 23:27 Moon at Ascending Node
15 03:40 FULL MOON
20 02 Mercury at Greatest Elong: 26.8°E
21 19:46 Moon at Apogee: 404358 km
23 02:02 LAST QUARTER MOON
25 12:28 Pleiades 2.1°N of Moon
26 04 Mercury at Aphelion
26 09:51 Mercury 2.1°S of Regulus
27 09:03 Moon at Descending Node
27 13:52 Mars 0.5°N of Moon: Occn.
28 11 Delta-Aquarid Meteor Shower
30 15:40 NEW MOON
Aug 01 08:20 Mercury 1.5°N of Moon
02 17:59 Moon at Perigee: 365756 km
05 00:08 Spica 2.4°N of Moon
06 08:08 FIRST QUARTER MOON
08 04:32 Antares 3.5°S of Moon
09 03:35 Moon at Ascending Node
09 05 Venus at Perihelion
13 03 Perseid Meteor Shower
13 15:58 FULL MOON
16 09 Venus at Superior Conjunction
16 22 Mercury at Inferior Conjunction
18 13:23 Moon at Apogee: 405161 km
21 18:55 LAST QUARTER MOON
21 20:40 Pleiades 2.3°N of Moon
22 19 Neptune at Opposition
23 14:23 Moon at Descending Node
25 10:36 Mars 2.7°N of Moon
27 22:07 Mercury 2.6°N of Moon
29 00:04 NEW MOON
30 14:35 Moon at Perigee: 360858 km
Sep 01 07:06 Spica 2.2°N of Moon
03 03 Mercury at Greatest Elong: 18.1°W
04 10:00 Antares 3.7°S of Moon
04 14:39 FIRST QUARTER MOON
05 04:36 Moon at Ascending Node
08 04 Mercury at Perihelion
08 23:18 Mercury 0.6°N of Regulus
12 06:27 FULL MOON
15 03:23 Moon at Apogee: 406068 km
18 03:46 Pleiades 2.5°N of Moon
19 16:38 Moon at Descending Node
20 10:39 LAST QUARTER MOON
23 05:23 Mars 4.8°N of Moon
23 06:05 Autumnal Equinox
25 21 Uranus at Opposition
27 08:09 NEW MOON
27 22:01 Moon at Perigee: 357556 km
28 16:34 Spica 2.1°N of Moon
28 17 Mercury at Superior Conjunction
Oct 01 17:04 Antares 3.9°S of Moon
02 06:09 Moon at Ascending Node
04 00:15 FIRST QUARTER MOON
11 23:06 FULL MOON
12 08:43 Moon at Apogee: 406435 km
13 18 Saturn in Conjunction with Sun
15 09:49 Pleiades 2.7°N of Moon
16 18:01 Moon at Descending Node
20 00:30 LAST QUARTER MOON
21 19 Orionid Meteor Shower
26 09:26 Moon at Perigee: 357051 km
26 16:56 NEW MOON
27 23:14 Mercury 0.2°N of Moon: Occn.
28 02:11 Venus 1.8°N of Moon
28 22 Jupiter at Opposition
29 02:37 Antares 4.1°S of Moon
29 11:59 Moon at Ascending Node
Nov 01 17 Mercury 2.0°S of Venus
02 13:38 FIRST QUARTER MOON
05 19 S Taurid Meteor Shower
08 10:20 Moon at Apogee: 406177 km
10 04:51 Venus 3.8°N of Antares
10 05:27 Mercury 1.9°N of Antares
10 15:21 Mars 1.3°N of Regulus
10 17:16 FULL MOON
11 08:32 Saturn 4.0°N of Spica
11 15:43 Pleiades 2.8°N of Moon
12 19 N Taurid Meteor Shower
12 21:35 Moon at Descending Node
13 05 Mercury 2.0°S of Venus
14 06 Mercury at Greatest Elong: 22.7°E
18 01 Leonid Meteor Shower
18 12:09 LAST QUARTER MOON
22 14:21 Spica 2.1°N of Moon
23 20:24 Moon at Perigee: 359692 km
25 03:10 NEW MOON
25 03:20 Partial Solar Eclipse; mag=0.905
25 22:02 Moon at Ascending Node
26 06:48 Mercury 1.7°S of Moon
27 01:29 Venus 2.8°S of Moon
Dec 02 06:52 FIRST QUARTER MOON
04 06 Mercury at Inferior Conjunction
05 03 Mercury at Perihelion
05 22:13 Moon at Apogee: 405414 km
08 22:26 Pleiades 2.8°N of Moon
10 04:04 Moon at Descending Node
10 11:32 Total Lunar Eclipse; mag=1.106
10 11:36 FULL MOON
14 14 Geminid Meteor Shower
17 21:48 LAST QUARTER MOON
19 22:37 Spica 2.1°N of Moon
21 23:56 Moon at Perigee: 364801 km
22 02:30 Winter Solstice
22 23 Ursid Meteor Shower
23 00 Mercury at Greatest Elong: 21.8°W
23 00:05 Antares 4.1°S of Moon
23 00:50 Mercury 2.6°N of Moon
23 08:36 Moon at Ascending Node
24 15:06 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
Argentina Time
The following table gives the date and time of the Moon's phases for the year. The times listed are for Argentina Time (Coordinated Universal Time − 3 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 | |||
| Argentina Time | |||
| New Moon | First Quarter | Full Moon | Last Quarter |
| Jan 04 06:03 P | Jan 12 08:31 | Jan 19 18:21 | Jan 26 09:57 |
| Feb 02 23:31 | Feb 11 04:18 | Feb 18 05:36 | Feb 24 20:26 |
| Mar 04 17:46 | Mar 12 20:45 | Mar 19 15:10 | Mar 26 09:07 |
| Apr 03 11:32 | Apr 11 09:05 | Apr 17 23:44 | Apr 24 23:47 |
| May 03 03:51 | May 10 17:33 | May 17 08:09 | May 24 15:52 |
| Jun 01 18:03 P | Jun 08 23:11 | Jun 15 17:13 t | Jun 23 08:48 |
| Jul 01 05:54 P | Jul 08 03:29 | Jul 15 03:40 | Jul 23 02:02 |
| Jul 30 15:40 | Aug 06 08:08 | Aug 13 15:58 | Aug 21 18:55 |
| Aug 29 00:04 | Sep 04 14:39 | Sep 12 06:27 | Sep 20 10:39 |
| Sep 27 08:09 | Oct 04 00:15 | Oct 11 23:06 | Oct 20 00:30 |
| Oct 26 16:56 | Nov 02 13:38 | Nov 10 17:16 | Nov 18 12:09 |
| Nov 25 03:10 P | Dec 02 06:52 | Dec 10 11:36 t | Dec 17 21:48 |
| Dec 24 15:06 | - | - | - |
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)