Events for April 2014

The following table gives the date and time of important astronomical events for April 2014. The time of each event is given in Greenwich Mean Time or GMT (a.k.a. Universal Time or UT). To convert GMT to Eastern Standard Time (EST) just subtract 5 hours. To convert GMT to other time zones, visit Time Zones. Some of the astronomical terms used in the calendar are explained in Definitions.

 Date    GMT   Astronomical Events for April 2014
------  -----  --------------------------------------------
        (h:m)

Apr 01  02:30  Moon at Descending Node 
    02  07     Uranus-Sun Conjunction 
    07  08:31  MOON AT FIRST QUARTER 
    08  14:52  Moon at Apogee: 404503 km
    08  20     Mars at Opposition 
    14  18:24  Mars 3.5°N of Moon
    15  07:42  FULL MOON 
    15  07:47  Total Lunar Eclipse; mag=1.296
    15  13:22  Moon at Ascending Node 
    17  07:42  Saturn 0.4°N of Moon: Occn.
    22  07:52  MOON AT LAST QUARTER 
    23  00:27  Moon at Perigee: 369765 km
    25  23:16  Venus 4.4°S of Moon
    26  03     Mercury at Superior Conjunction 
    28  11:36  Moon at Descending Node 
    29  06:04  Non-Central Annular Solar Eclipse; mag=0.982
    29  06:14  NEW MOON 

As the events above transpire, I will post photographs of some of them at Recent Images.

The highlight of the month is the Total Lunar Eclipse of April 15. You’ll find complete details, diagrams and maps at this link.

Astronomical events calendars for complete years and for five time zones are available through the links below.

Time Zones Calendars of Astronomical Events
Greenwich Mean Time 2014 2015 2016 2017 2018 2019 2020
Eastern Standard Time 2014 2015 2016 2017 2018 2019 2020
Central Standard Time 2014 2015 2016 2017 2018 2019 2020
Mountain Standard Time 2014 2015 2016 2017 2018 2019 2020
Pacific Standard Time 2014 2015 2016 2017 2018 2019 2020

For additional years and time zones, see Calendars of Astronomical Events.

The sky events tables were all generated by a computer program I wrote (with THINK Pascal running on a Macintosh G4) using Astronomical Algorithms (Jean Meeus).

Fred Espenak


Events for March 2014

The following table gives the date and time of important astronomical events for March 2014. The time of each event is given in Greenwich Mean Time or GMT (a.k.a. Universal Time or UT). To convert GMT to Eastern Standard Time (EST) just subtract 5 hours. To convert GMT to other time zones, visit Time Zones. Some of the astronomical terms used in the calendar are explained in Definitions.

 Date    GMT   Astronomical Events for March 2014
------  -----  --------------------------------------------
        (h:m)

Mar 01  08:00  NEW MOON 
    04  17:45  Moon at Descending Node 
    08  13:27  MOON AT FIRST QUARTER 
    11  19:46  Moon at Apogee: 405367 km
    14  06     Mercury at Greatest Elong: 27.6°W
    16  17:09  FULL MOON 
    19  03:14  Mars 3.2°N of Moon
    19  06:30  Moon at Ascending Node 
    19  23     Mercury at Aphelion 
    20  16:57  Vernal Equinox 
    21  03:40  Saturn 0.2°N of Moon: Occn.
    22  21     Venus at Greatest Elong: 46.6°W
    24  01:46  MOON AT LAST QUARTER 
    26  15:10  Mars-Spica: 4.6°N
    27  09:52  Venus 3.6°S of Moon
    27  18:30  Moon at Perigee: 365706 km
    30  18:45  NEW MOON 

As the events above transpire, I will post photographs of some of them at Recent Images.

Astronomical events calendars for complete years and for five time zones are available through the links below.

Time Zones Calendars of Astronomical Events
Greenwich Mean Time 2014 2015 2016 2017 2018 2019 2020
Eastern Standard Time 2014 2015 2016 2017 2018 2019 2020
Central Standard Time 2014 2015 2016 2017 2018 2019 2020
Mountain Standard Time 2014 2015 2016 2017 2018 2019 2020
Pacific Standard Time 2014 2015 2016 2017 2018 2019 2020

For additional years and time zones, see Calendars of Astronomical Events.

The sky events tables were all generated by a computer program I wrote (with THINK Pascal running on a Macintosh G4) using Astronomical Algorithms (Jean Meeus).

Fred Espenak


Events for February 2014

The following table gives the date and time of important astronomical events for February 2014. The time of each event is given in Greenwich Mean Time or GMT (a.k.a. Universal Time or UT). To convert GMT to Eastern Standard Time (EST) just subtract 5 hours. To convert GMT to other time zones, visit Time Zones. Some of the astronomical terms used in the calendar are explained in Definitions.

 Date    GMT   Astronomical Events for February 2014
------  -----  --------------------------------------------
        (h:m)

Feb 02  20:27  Mars-Spica: 4.4°N
    04  00     Mercury at Perihelion 
    05  12:41  Moon at Descending Node 
    06  19:22  MOON AT FIRST QUARTER 
    12  05:09  Moon at Apogee: 406232 km
    14  23:53  FULL MOON 
    15  20     Mercury at Inferior Conjunction 
    19  23:59  Mars 3.1°N of Moon
    20  03:28  Moon at Ascending Node 
    21  22:39  Saturn 0.3°N of Moon: Occn.
    22  17:15  MOON AT LAST QUARTER 
    23  17     Neptune-Sun Conjunction 
    26  05:23  Venus 0.4°S of Moon: Occn.
    27  19:52  Moon at Perigee: 360439 km
    27  21:24  Mercury 2.9°S of Moon

As the events above transpire, I will post photographs of some of them at Recent Images.

Astronomical events calendars for complete years and for five time zones are available through the links below.

Time Zones Calendars of Astronomical Events
Greenwich Mean Time 2014 2015 2016 2017 2018 2019 2020
Eastern Standard Time 2014 2015 2016 2017 2018 2019 2020
Central Standard Time 2014 2015 2016 2017 2018 2019 2020
Mountain Standard Time 2014 2015 2016 2017 2018 2019 2020
Pacific Standard Time 2014 2015 2016 2017 2018 2019 2020

For additional years and time zones, see Calendars of Astronomical Events.

The sky events tables were all generated by a computer program I wrote (with THINK Pascal running on a Macintosh G4) using Astronomical Algorithms (Jean Meeus).

Fred Espenak


Enormous Sunspot in 2014

In the first days of 2014, an enormous sunspot appeared along the eastern edge of the Sun. Formally known as Active Region 1944 (or AR1944), this feature is actually composed over 60 individual sunspots. The largest of them is several times larger than planet Earth.

The Sun and Active Region 1944 as seen on 2014 Jan 07. For more information, see Sun and Sunspot.

The Sun and Active Region 1944 as seen on 2014 Jan 07. For more information, see Sun and Sunspot. Photo ©2014 by Fred Espenak

So large is AR 1944, that it can be seen with the naked eye provided you use a solar filter to attenuate the Sun’s intense light. I’ve spotted AR 1944 with nothing more that a pair of eclipse glasses left over from a past eclipse trip. Last night (Jan. 06), I photographed the Sun setting behind some of the rugged peaks of the Chiricahua Mountains near my home in Portal, AZ. I found it fascinating to watch the Sun and AR 1944 pass behind the distant spires before disappearing from view.

AR1944 is easily seen as the Sun sets among the rugged peaks of the Chiricahua Mountains on January 06. For more information, see Sunset with Sunspot. Photo ©2014 by Fred Espenak

AR 1944 is easily seen as the Sun sets among the rugged peaks of the Chiricahua Mountains on January 06. For more information, see Sunset with Sunspot. Photo ©2014 by Fred Espenak

In spite of being an active region on the Sun, AR 1944 has been relatively quite since its appearance. But that could change quickly with a powerful solar flare. According to SpaceWeather.com: “The sunspot has an unstable ‘beta-gamma-delta’ magnetic field that could erupt at any time. NOAA forecasters estimate a 75% chance of M-class flares and a 30% chance of X-flares on Jan. 7th.”

Since AR 1944 is now appears near the center of the Sun’s disk, it is aimed directly at Earth. So any major eruptions will spew high energy particles and x-rays directly at us, possibly triggering a major geomagnetic storm. Such events can damage satellites in high geosynchronous orbits. This is where most communications satellites orbit, so a major flare can effect global telecommunications. For more on this topic, see What impact do solar flares have on human activities?.

A closeup of AR1944 reveals that the large sunspot is actually composed of dozens of smaller sunspots. This image was made on January 7 from Portal, AZ . For more information, see Sunset with Sunspot. Photo ©2014 by Fred Espenak

A closeup of AR 1944 reveals that the large sunspot is actually composed of dozens of smaller sunspots. This image was made on January 7 from Portal, AZ . For more information, see Sunset with Sunspot. Photo ©2014 by Fred Espenak

Solar physicists and space weather experts will be watching AR 1944 closely in the coming days. And so will amateur astronomers and sky watchers around the globe.

Fred Espenak

Update: According to NASA: “The sun emitted a significant solar flare, an X1.2, peaking at 3:31 p.m. EST on Jan.7, 2014. This is the first significant flare of 2014, and it follows on the heels of mid-level flare earlier in the day.” The source of this flare is AR 1944.

Events for January 2014

The following table gives the date and time of important astronomical events for January 2014. The time of each event is given in Greenwich Mean Time or GMT (a.k.a. Universal Time or UT). To convert GMT to Eastern Standard Time (EST) just subtract 5 hours. To convert GMT to other time zones, visit Time Zones. Some of the astronomical terms used in the calendar are explained in Definitions.

 Date    GMT   Astronomical Events for January 2014
------  -----  --------------------------------------------
        (h:m)

Jan 01  11:14  NEW MOON 
    01  21:00  Moon at Perigee: 356922 km
    03  00     Mars at Aphelion 
    04  05:59  Earth at Perihelion: 0.98333 AU
    05  20     Jupiter at Opposition 
    08  03:39  FIRST QUARTER 
    09  11:26  Moon at Descending Node 
    11  12     Venus at Inferior Conjunction 
    16  01:53  Moon at Apogee: 406537 km
    16  04:52  FULL MOON 
    23  06:29  Mars 3.7°N of Moon
    24  02:55  Moon at Ascending Node 
    24  04     Venus at Perihelion 
    24  05:19  LAST QUARTER 
    25  14:18  Saturn 0.5°N of Moon: Occn.
    29  02:36  Venus 2.2°N of Moon
    30  09:58  Moon at Perigee: 357080 km
    30  21:39  NEW MOON 
    31  10     Mercury at Greatest Elong: 18.4°E

As the events above transpire, I will post photographs of some of them at Recent Images.

Astronomical events calendars for complete years and for five time zones are available through the links below.

Time Zones Calendars of Astronomical Events
Greenwich Mean Time 2014 2015 2016 2017 2018 2019 2020
Eastern Standard Time 2014 2015 2016 2017 2018 2019 2020
Central Standard Time 2014 2015 2016 2017 2018 2019 2020
Mountain Standard Time 2014 2015 2016 2017 2018 2019 2020
Pacific Standard Time 2014 2015 2016 2017 2018 2019 2020

For additional years and time zones, see Calendars of Astronomical Events.

The sky events tables were all generated by a computer program I wrote (with THINK Pascal running on a Macintosh G4) using Astronomical Algorithms (Jean Meeus).

Fred Espenak


Moon in 2014

Moon Phases Mosaic

As the Moon orbits Earth, its changing geometry with respect to the Sun produces the characteristic phases. This composite image is a mosaic made from 25 individual photos of the Moon and illustrates its phases over one synodic month. For complete details about this image, see Moon Phases Mosaic. The individual images included in this composite can be found in the Moon Phases Gallery. For more composites, see Moon Phases Mosaics. Photo copyright 2012 by Fred Espenak.

As the Moon orbits Earth, its changing geometry with respect to the Sun produces the Moon’s characteristic phases (New Moon, First Quarter, Full Moon and Last Quarter). One orbit of the Moon relative to the Sun (the synodic month) has a mean duration of 29.53 days.

The table below lists the date and time of the Moon’s phases throughout 2014. The time of each phase is given in Greenwich Mean Time or GMT (a.k.a. Universal Time or UT). To convert GMT to Eastern Standard Time (EST) just subtract 5 hours. To convert GMT to other time zones, visit Time Zones.

                    Moon Phases for 2014 (GMT)

   New Moon      First Quarter      Full Moon       Last Quarter
-------------    -------------    -------------    -------------   
Jan  1  06:14    Jan  7  22:39    Jan 15  23:52    Jan 24  00:19    
Jan 30  16:39    Feb  6  14:22    Feb 14  18:53    Feb 22  12:15    
Mar  1  03:00    Mar  8  08:27    Mar 16  12:09    Mar 23  20:46    
Mar 30  13:45    Apr  7  03:31    Apr 15  02:42    Apr 22  02:52    
Apr 29  01:14    May  6  22:15    May 14  14:16    May 21  07:59    
May 28  13:40    Jun  5  15:39    Jun 12  23:11    Jun 19  13:39    
Jun 27  03:09    Jul  5  06:59    Jul 12  06:25    Jul 18  21:08    
Jul 26  17:42    Aug  3  19:50    Aug 10  13:09    Aug 17  07:26    
Aug 25  09:13    Sep  2  06:11    Sep  8  20:38    Sep 15  21:05    
Sep 24  01:14    Oct  1  14:33    Oct  8  05:51    Oct 15  14:12    
Oct 23  16:57    Oct 30  21:48    Nov  6  17:23    Nov 14  10:16    
Nov 22  07:32    Nov 29  05:06    Dec  6  07:27    Dec 14  07:51    
Dec 21  20:36    Dec 28  13:31                                        

I’ve generated a table of the Moon’s phases covering 100 years at Moon’s Phases – 21st Century (GMT). Similar 100-year tables for other time zones include Eastern Standard Time (EST), Central Standard Time (CST), Mountain Standard Time (MST), and Pacific Standard Time (PST).

What surprises many people is that the length of the synodic month can vary by over 6 hours from its mean value of 29.5306 days (29 days 12 hours 44 minutes). The table below gives the date of New Moon, the length of the synodic month, and the difference from the synodic month’s mean value for every synodic month in 2014. For instance, the first synodic month of 2014 is 2 hours 20 minutes shorter than the mean while the nineth month (beginning Aug 25) is 3 hours 17 minutes longer than the mean.

              Synodic Months for 2014 

   Date/Time of        Length of     Dif. from
  New Moon (GMT)     Synodic Month   Mean Month 
------------------   -------------  -----------
2014 Jan 01  11:14    29d 10h 24m    -02h 20m
2014 Jan 30  21:39    29d 10h 21m    -02h 23m 
2014 Mar 01  08:00    29d 10h 45m    -01h 59m
2014 Mar 30  18:45    29d 11h 30m    -01h 14m
2014 Apr 29  06:14    29d 12h 26m    -00h 18m
2014 May 28  18:40    29d 13h 28m    +00h 44m
2014 Jun 27  08:08    29d 14h 33m    +01h 49m
2014 Jul 26  22:42    29d 15h 31m    +02h 47m
2014 Aug 25  14:13    29d 16h 01m    +03h 17m 
2014 Sep 24  06:14    29d 15h 43m    +02h 59m
2014 Oct 23  21:57    29d 14h 36m    +01h 52m
2014 Nov 22  12:32    29d 13h 04m    +00h 20m
2014 Dec 22  01:36    29d 11h 38m    -01h 06m

The year 2008 had even greater extremes in the synodic month – from 5 hours 48 minutes shorter, to 6 hours 49 minutes longer than the mean value. So what causes these variations? The explanation lies in the fact that the Moon’s orbit is elliptical. If New Moon occurs when the Moon is nearest to Earth (perigee), then the synodic month is shorter than normal. On the other hand, if New Moon occurs when the Moon is farthest from Earth (apogee), then the synodic month is longer than normal. Furthermore, the orientation of the Moon’s ellipse-shaped orbit slowly rotates in space with a period of about 18 years. A more detailed discussion on this topic can be found at Moon’s Orbit and the Synodic Month. You can also find the duration of every synodic month this century at Length of the Synodic Month: 2001 to 2100.

Because the Moon orbits Earth in ~29.5 days with respect to the Sun, its daily motion against the background stars and constellations is quite rapid. It averages about 12.2° per day. A table giving the Moon’s daily celestial coordinates throughout the year can be found at 2014 Moon Ephemeris. This table lists a lot of other details about the Moon including its daily distance, apparent size, libration, phase age (days since New Moon) and the phase illumination fraction. See the above table for descriptions of all these terms.

A Super Moon is a Full Moon that occurs within 90% of the Moon’s closest approach to Earth in a given orbit. The Full Moon then appears especially big and bright since it subtends its largest apparent diameter as seen from Earth. The table below lists the Super Moons occurring in 2014.

              Super Moons for 2014 

   Full Moon     Distance  Diameter  Relative
    (GMT)          (km)    (arc-min) Distance

Jun 13  04:11     365038     32.73    0.931
Jul 12  11:25     358975     33.29    0.985
Aug 10  18:09     356898     33.48    1.000
Sep 09  01:38     359182     33.27    0.983
Oct 08  10:51     365659     32.68    0.925

The Relative Distance listed in this table expresses the Moon’s distance as a fraction between apogee (0.0) and perigee (1.0). For much more on Super Moons and a complete list of them for this century, see Full Moon at Perigee (Super Moon): 2001 to 2100.

Besides its obvious phases, the Moon also undergoes some additional extremes in its orbit including: Perigee and Apogee, Ascending/Descending Nodes, and Lunar Standstills. Each of the above links covers lunar phenomena for the entire 21st Century.

Moon Phases Mosaic

A mosaic made from 9 individual photos of the Moon captures its phases over one synodic month. For complete details about this image, see Moon Phases Mosaic. The individual images included in this composite can be found in the Moon Phases Gallery. For more composites, see Moon Phases Mosaics. Photo copyright 2012 by Fred Espenak.

One of the first projects I tacked upon completing Bifrost Observatory in 2010 was to photograph the Moon’s phases every day for a complete month. Of course, the weather doesn’t always cooperate (even from sunny Arizona) so it actually took several months to complete the project. You can see the results at the Moon Phases Gallery. Clicking on any of the thumbnails pictures will give you an enlarged image with complete technical details. You can also visit Moon Phases Mosaics to see composites showing the Moon’s phases over a complete synodic month.

Last year (2013), NASA’s Lunar Reconnaissance Orbiter (LRO) team created clever animation using data from both the LRO and Clementine missions. It illustrates the Moon’s phases throughout 2013 at 1-hour intervals.

Besides presenting the Moon’s phase and apparent size, the video shows the Moon’s orbital position with respect to the Sun and Earth, and it’s distance from Earth. As the Moon orbits Earth, it appears to wobble and tip on its axis. This motion is called libration and it allows us to see about 59% of the Moon’s surface. The major cause of libration is due to our changing line of sight because of the Moon’s elliptical orbit.

Finally, what discussion of the Moon would be complete without mentioning eclipses in 2014? There are two eclipses of the Moon and both of them are total. The first occurs on April 15 and the second, six months later on October 8. Both of them are well placed for viewing from North America. There are also two solar eclipses. The first is an annular eclipse in Antarctica on April 29 (a partial eclipse is visible from Australia). The second is a partial solar eclipse visible from most of North America on October 23. I’ve written an article with more information at Eclipses During 2014.

Watching the Moon’s phases wax and wane as well as the occasional lunar eclipse can best be enjoyed with the naked eye and binoculars. And you don’t even need a dark sky since the Moon is easily visible from the heart of brightly lit cities.

The Moon phases and lunar phenomena discussed here were all generated with computer programs I’ve written (THINK Pascal running on a Macintosh G4) using Astronomical Algorithms (Jean Meeus).

Fred Espenak

Events for December 2013

The following table gives the date and time of important astronomical events for December 2013. The time of each event is given in Greenwich Mean Time or GMT (a.k.a. Universal Time or UT). To convert GMT to Eastern Standard Time (EST) just subtract 5 hours. To convert GMT to other time zones, visit Time Zones. Some of the astronomical terms used in the calendar are explained in Definitions.

 Date    GMT   Astronomical Events for December 2013
------  -----  --------------------------------------------
        (h:m)
Dec 01  10:13  Saturn 1.2°N of Moon: Occultation
Dec 03  00:22  NEW MOON 
Dec 04  10:15  Moon at Perigee: 360065 km
Dec 09  15:12  FIRST QUARTER MOON 
Dec 13  10:10  Moon at Descending Node 
Dec 14  05     Geminid Meteor Shower
Dec 16  02:45  Aldebaran 2.7°S of Moon
Dec 17  09:28  FULL MOON 
Dec 19  07:11  Jupiter 5.0°N of Moon
Dec 19  23:49  Moon at Apogee: 406269 km
Dec 21  17:11  Winter Solstice 
Dec 22  00     Mercury at Aphelion 
Dec 22  14     Ursid Meteor Shower
Dec 22  22:47  Regulus 5.4°N of Moon
Dec 25  13:48  LAST QUARTER MOON 
Dec 26  02:45  Mars 4.6°N of Moon
Dec 27  02:10  Spica 1.0°S of Moon
Dec 28  00:21  Moon at Ascending Node 
Dec 29  01:42  Saturn 0.9°N of Moon: Occultation
Dec 29  06     Mercury at Superior Conjunction 

As the events above transpire, I will post photographs of some of them at Recent Images.

Astronomical events calendars for complete years and for five time zones are available through the links below.

Time Zones Calendars of Astronomical Events
Greenwich Mean Time 2013 2014 2015 2016 2017 2018 2019 2020
Eastern Standard Time 2013 2014 2015 2016 2017 2018 2019 2020
Central Standard Time 2013 2014 2015 2016 2017 2018 2019 2020
Mountain Standard Time 2013 2014 2015 2016 2017 2018 2019 2020
Pacific Standard Time 2013 2014 2015 2016 2017 2018 2019 2020

For additional years and time zones, see Calendars of Astronomical Events.

The sky events tables were all generated by a computer program I wrote (with THINK Pascal running on a Macintosh G4) using Astronomical Algorithms (Jean Meeus).

Fred Espenak


Events for November 2013

The following table gives the date and time of important astronomical events for November 2013. The time of each event is given in Greenwich Mean Time or GMT (a.k.a. Universal Time or UT). To convert GMT to Eastern Standard Time (EST) just subtract 5 hours. To convert GMT to other time zones, visit Time Zones. Some of the astronomical terms used in the calendar are explained in Definitions.

 Date    GMT   Astronomical Events for November 2013
------  -----  --------------------------------------------
        (h:m)
Nov 01  09     Venus at Greatest Elongation: 47.1°E
Nov 01  20     Mercury at Inferior Conjunction 
Nov 03  06:52  Moon at Ascending Node 
Nov 03  12:47  Hybrid Solar Eclipse; mag=1.014
Nov 03  12:50  NEW MOON 
Nov 05  11     S Taurid Meteor Shower
Nov 06  09:28  Moon at Perigee: 365362 km
Nov 06  11     Saturn in Conjunction with Sun 
Nov 08  00     Mercury at Perihelion 
Nov 08  15:08  Jupiter 6.1°S of Pollux
Nov 10  05:57  FIRST QUARTER MOON 
Nov 12  10     N Taurid Meteor Shower
Nov 16  05:30  Moon at Descending Node 
Nov 17  15:16  FULL MOON 
Nov 17  16     Leonid Meteor Shower
Nov 18  02     Mercury at Greatest Elongation: 19.5°W
Nov 18  20:00  Aldebaran 2.7°S of Moon
Nov 22  05:21  Jupiter 5.1°N of Moon
Nov 22  09:50  Moon at Apogee: 405446 km
Nov 25  15:45  Regulus 5.6°N of Moon
Nov 25  19:28  LAST QUARTER MOON 
Nov 26  05     Mercury 0.3° of Saturn
Nov 27  16:10  Mars 5.7°N of Moon
Nov 29  16:43  Spica 0.9°S of Moon
Nov 30  16:59  Moon at Ascending Node 

As the events above transpire, I will post photographs of some of them at Recent Images.

Astronomical events calendars for complete years and for five time zones are available through the links below.

Time Zones Calendars of Astronomical Events
Greenwich Mean Time 2013 2014 2015 2016 2017 2018 2019 2020
Eastern Standard Time 2013 2014 2015 2016 2017 2018 2019 2020
Central Standard Time 2013 2014 2015 2016 2017 2018 2019 2020
Mountain Standard Time 2013 2014 2015 2016 2017 2018 2019 2020
Pacific Standard Time 2013 2014 2015 2016 2017 2018 2019 2020

For additional years and time zones, see Calendars of Astronomical Events.

The sky events tables were all generated by a computer program I wrote (with THINK Pascal running on a Macintosh G4) using Astronomical Algorithms (Jean Meeus).

Fred Espenak


Events for October 2013

The following table gives the date and time of important astronomical events for October 2013. The time of each event is given in Greenwich Mean Time or GMT (a.k.a. Universal Time or UT). To convert GMT to Eastern Standard Time (EST) just subtract 5 hours. To convert GMT to other time zones, visit Time Zones. Some of the astronomical terms used in the calendar are explained in Definitions.

 Date    GMT   Astronomical Events for October 2013
------  -----  --------------------------------------------
        (h:m)
Oct 01  22:19  Regulus 5.6°N of Moon
Oct 03  13     Uranus at Opposition 
Oct 03  19     Venus at Aphelion 
Oct 05  00:35  NEW MOON 
Oct 06  22:08  Moon at Ascending Node 
Oct 06  22:28  Mercury 2.8°S of Moon
Oct 07  04:30  Saturn 1.9°N of Moon
Oct 08  12:07  Venus 4.7°S of Moon
Oct 08  13     Mercury 5.0° of Saturn
Oct 09  10     Mercury at Greatest Elongation: 25.3°E
Oct 10  23:06  Moon at Perigee: 369813 km
Oct 11  23:02  FIRST QUARTER MOON 
Oct 15  03:51  Mars 0.9°N of Regulus
Oct 16  18:26  Venus 1.5°N of Antares
Oct 18  23:38  FULL MOON 
Oct 18  23:51  Penumbral Lunar Eclipse; mag=0.756
Oct 19  21:47  Moon at Descending Node 
Oct 21  10     Orionid Meteor Shower
Oct 22  12:06  Aldebaran 2.7°S of Moon
Oct 25  14:25  Moon at Apogee: 404561 km
Oct 25  21:55  Jupiter 5.1°N of Moon
Oct 26  23:41  LAST QUARTER MOON 
Oct 29  07:17  Regulus 5.7°N of Moon

As the events above transpire, I will post photographs of some of them at Recent Images.

Astronomical events calendars for complete years and for five time zones are available through the links below.

Time Zones Calendars of Astronomical Events
Greenwich Mean Time 2013 2014 2015 2016 2017 2018 2019 2020
Eastern Standard Time 2013 2014 2015 2016 2017 2018 2019 2020
Central Standard Time 2013 2014 2015 2016 2017 2018 2019 2020
Mountain Standard Time 2013 2014 2015 2016 2017 2018 2019 2020
Pacific Standard Time 2013 2014 2015 2016 2017 2018 2019 2020

For additional years and time zones, see Calendars of Astronomical Events.

The sky events tables were all generated by a computer program I wrote (with THINK Pascal running on a Macintosh G4) using Astronomical Algorithms (Jean Meeus).

Fred Espenak


Events for September 2013

The following table gives the date and time of important astronomical events for September 2013. The time of each event is given in Greenwich Mean Time or GMT (a.k.a. Universal Time or UT). To convert GMT to Eastern Standard Time (EST) just subtract 5 hours. To convert GMT to other time zones, visit Time Zones. Some of the astronomical terms used in the calendar are explained in Definitions.

 Date    GMT   Astronomical Events for September 2013
------  -----  --------------------------------------------
        (h:m)
Sep 05  11:36  NEW MOON 
Sep 06  00:37  Venus 1.5°N of Spica
Sep 08  10:00  Mars 0.5°S of Beehive
Sep 08  14:11  Spica 0.8°S of Moon
Sep 08  21:04  Venus 0.4°N of Moon: Occultation
Sep 09  17:29  Moon at Ascending Node 
Sep 09  17:29  Saturn 2.3°N of Moon
Sep 12  17:08  FIRST QUARTER MOON 
Sep 15  16:34  Moon at Perigee: 367388 km
Sep 19  11:13  FULL MOON 
Sep 22  13:48  Moon at Descending Node 
Sep 22  20:44  Autumnal Equinox 
Sep 24  22:29  Mercury 0.7°N of Spica
Sep 25  03:39  Aldebaran 2.7°S of Moon
Sep 27  03:56  LAST QUARTER MOON 
Sep 27  18:17  Moon at Apogee: 404309 km
Sep 28  09:05  Jupiter 4.9°N of Moon

As the events above transpire, I will post photographs of some of them at Recent Images.

Astronomical events calendars for complete years and for five time zones are available through the links below.

Time Zones Calendars of Astronomical Events
Greenwich Mean Time 2013 2014 2015 2016 2017 2018 2019 2020
Eastern Standard Time 2013 2014 2015 2016 2017 2018 2019 2020
Central Standard Time 2013 2014 2015 2016 2017 2018 2019 2020
Mountain Standard Time 2013 2014 2015 2016 2017 2018 2019 2020
Pacific Standard Time 2013 2014 2015 2016 2017 2018 2019 2020

For additional years and time zones, see Calendars of Astronomical Events.

The sky events tables were all generated by a computer program I wrote (with THINK Pascal running on a Macintosh G4) using Astronomical Algorithms (Jean Meeus).

Fred Espenak