2015 Calendar of Astronomical Events



2015 Phases of the Moon

Mountain Standard Time

The following table gives the date and time of the Moon's phases for the year. If Daylight Saving Time is in effect, add one hour to the times listed.

2015 Phases of the Moon
Mountain Standard Time
New Moon First Quarter Full Moon Last Quarter
-- Jan 4 21:53 Jan 13 02:47
Jan 20 06:14 Jan 26 21:48 Feb 3 16:09 Feb 11 20:50
Feb 18 16:47 Feb 25 10:14 Mar 5 11:06 Mar 13 10:48
Mar 20 02:36 T Mar 27 00:43 Apr 4 05:06 t Apr 11 20:44
Apr 18 11:57 Apr 25 16:55 May 3 20:42 May 11 03:36
May 17 21:13 May 25 10:19 Jun 2 09:19 Jun 9 08:42
Jun 16 07:05 Jun 24 04:03 Jul 1 19:20 Jul 8 13:24
Jul 15 18:24 Jul 23 21:04 Jul 31 03:43 Aug 6 19:03
Aug 14 07:54 Aug 22 12:31 Aug 29 11:35 Sep 5 02:54
Sep 12 23:41 P Sep 21 01:59 Sep 27 19:50 t Oct 4 14:06
Oct 12 17:06 Oct 20 13:31 Oct 27 05:05 Nov 3 05:24
Nov 11 10:47 Nov 18 23:27 Nov 25 15:44 Dec 3 00:40
Dec 11 03:29 Dec 18 08:14 Dec 25 04:11 -

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 table above. 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.

Phases of the Moon Photo Gallery is an image collection showing the Moon's phases over a complete synodic month.



2015 Calendar of Astronomical Events

Mountain Standard Time

The following table gives the date and time of the important astronomical events for the year. If Daylight Saving Time is in effect, add one hour to the times listed. A key to astronomical terms appears below the calendar.

2015 Calendar of Astronomical Events
January - June July - December
Date     MST   Event
        (h:m)

Jan 02  04:35  Aldebaran 1.4°S of Moon
    03  19     Quadrantid Meteor Shower
    03  23     Earth at Perihelion: 0.98328 AU
    04  21:53  FULL MOON 
    08  01:16  Jupiter 5.1°N of Moon
    08  18:34  Regulus 4.1°N of Moon
    09  11:17  Moon at Apogee: 405411 km
    10  18     Mercury 0.6° of Venus
    12  08:33  Moon at Ascending Node 
    13  02:27  Spica 3.1°S of Moon
    13  02:47  LAST QUARTER MOON 
    14  13     Mercury at Greatest Elong: 18.9°E
    16  04:52  Saturn 1.9°S of Moon
    20  06:14  NEW MOON 
    21  10:39  Mercury 3.0°S of Moon
    21  13:06  Moon at Perigee: 359643 km
    21  14     Mercury at Perihelion 
    21  22:01  Venus 5.6°S of Moon
    22  21:40  Mars 3.9°S of Moon
    25  03:23  Moon at Descending Node 
    26  21:48  FIRST QUARTER MOON 
    29  10:07  Aldebaran 1.2°S of Moon
    30  07     Mercury at Inferior Conjunction 

Feb 03  16:09  FULL MOON 
    04  01:35  Jupiter 5.2°N of Moon
    05  01:17  Regulus 4.0°N of Moon
    05  23:25  Moon at Apogee: 406155 km
    06  10     Jupiter at Opposition 
    08  10:10  Moon at Ascending Node 
    09  09:23  Spica 3.3°S of Moon
    11  20:50  LAST QUARTER MOON 
    12  17:10  Saturn 2.1°S of Moon
    16  23:20  Mercury 3.5°S of Moon
    18  16:47  NEW MOON 
    19  00:29  Moon at Perigee: 356992 km
    20  17:56  Venus 2.0°S of Moon
    20  18:28  Mars 1.5°S of Moon
    21  09:05  Moon at Descending Node 
    24  09     Mercury at Greatest Elong: 26.7°W
    25  10:14  FIRST QUARTER MOON 
    25  16:02  Aldebaran 1.0°S of Moon
    25  21     Neptune in Conjunction with Sun 

Mar 03  00:56  Jupiter 5.5°N of Moon
    04  07:29  Regulus 4.0°N of Moon
    05  00:35  Moon at Apogee: 406386 km
    05  11:05  FULL MOON 
    06  13     Mercury at Aphelion 
    07  14:04  Moon at Ascending Node 
    08  15:21  Spica 3.4°S of Moon
    12  01:25  Saturn 2.3°S of Moon
    13  10:48  LAST QUARTER MOON 
    18  21:57  Mercury 5.2°S of Moon
    19  12:38  Moon at Perigee: 357584 km
    20  02:36  NEW MOON 
    20  02:46  Total Solar Eclipse; mag=1.045
    20  15:45  Vernal Equinox 
    20  19:19  Moon at Descending Node 
    21  15:13  Mars 1.0°N of Moon: Occn.
    22  12:51  Venus 2.8°N of Moon
    24  23:55  Aldebaran 0.9°S of Moon
    27  00:43  FIRST QUARTER MOON 
    30  03:19  Jupiter 5.6°N of Moon
    31  13:45  Regulus 4.0°N of Moon

Apr 01  05:59  Moon at Apogee: 406012 km
    03  20:17  Moon at Ascending Node 
    04  05:00  Total Lunar Eclipse; mag=1.001
    04  05:06  FULL MOON 
    04  21:21  Spica 3.5°S of Moon
    06  07     Uranus in Conjunction with Sun 
    08  06:08  Saturn 2.2°S of Moon
    08  07:34  Jupiter 2.0°S of Beehive
    09  21     Mercury at Superior Conjunction 
    11  08:28  Venus 2.5°S of Pleiades
    11  20:44  LAST QUARTER MOON 
    16  20:53  Moon at Perigee: 361026 km
    17  06:07  Moon at Descending Node 
    18  06     Venus at Perihelion 
    18  11:57  NEW MOON 
    19  12:24  Venus 7.2°N of Aldebaran
    19  13     Mercury at Perihelion 
    21  09:35  Aldebaran 0.9°S of Moon
    22  12     Mercury 1.3° of Mars
    22  16     Lyrid Meteor Shower
    25  16:55  FIRST QUARTER MOON 
    26  11:06  Jupiter 5.5°N of Moon
    27  20:38  Regulus 4.0°N of Moon
    28  20:55  Moon at Apogee: 405085 km
    30  18:29  Mercury 1.6°S of Pleiades

May 01  02:50  Moon at Ascending Node 
    02  04:10  Spica 3.5°S of Moon
    03  20:42  FULL MOON 
    05  06     Eta-Aquarid Meteor Shower
    05  09:19  Saturn 2.0°S of Moon
    06  22     Mercury at Greatest Elong: 21.2°E
    11  03:36  LAST QUARTER MOON 
    14  13:37  Moon at Descending Node 
    14  17:23  Moon at Perigee: 366024 km
    17  21:13  NEW MOON 
    18  23:51  Mercury 5.7°N of Moon
    22  18     Saturn at Opposition 
    24  00:03  Jupiter 5.1°N of Moon
    25  04:14  Regulus 3.8°N of Moon
    25  10:19  FIRST QUARTER MOON 
    26  15:12  Moon at Apogee: 404246 km
    28  07:40  Moon at Ascending Node 
    29  10:27  Venus 3.9°S of Pollux
    29  11:52  Spica 3.6°S of Moon
    30  10     Mercury at Inferior Conjunction 

Jun 01  13:02  Saturn 1.9°S of Moon
    02  09:19  FULL MOON 
    06  12     Venus at Greatest Elong: 45.4°E
    09  08:42  LAST QUARTER MOON 
    09  21:39  Moon at Perigee: 369713 km
    10  16:30  Moon at Descending Node 
    13  01:59  Venus 0.5°N of Beehive
    14  08     Mars in Conjunction with Sun 
    14  19:26  Mercury 0.0°N of Moon: Occn.
    16  07:05  NEW MOON 
    20  04:28  Venus 5.8°N of Moon
    20  16:29  Jupiter 4.7°N of Moon
    21  09:38  Summer Solstice 
    21  12:10  Regulus 3.6°N of Moon
    23  02:37  Mercury 1.8°N of Aldebaran
    23  10:01  Moon at Apogee: 404134 km
    24  04:03  FIRST QUARTER MOON 
    24  10     Mercury at Greatest Elong: 22.5°W
    24  10:23  Moon at Ascending Node 
    25  19:58  Spica 3.8°S of Moon
    28  18:27  Saturn 2.0°S of Moon

Date     MST   Event
        (h:m)

Jul 01  19:20  FULL MOON 
    05  11:54  Moon at Perigee: 367095 km
    06  12     Earth at Aphelion: 1.01668 AU
    07  17:07  Moon at Descending Node 
    08  13:24  LAST QUARTER MOON 
    12  10:55  Aldebaran 0.9°S of Moon
    14  14:15  Venus 1.5°S of Regulus
    15  18:24  NEW MOON 
    16  12     Mercury at Perihelion 
    18  10:34  Jupiter 4.1°N of Moon
    18  18:06  Venus 0.4°N of Moon: Occn.
    18  19:49  Regulus 3.4°N of Moon
    21  04:02  Moon at Apogee: 404837 km
    21  12:32  Moon at Ascending Node 
    23  03:45  Spica 4.0°S of Moon
    23  12     Mercury at Superior Conjunction 
    23  21:04  FIRST QUARTER MOON 
    26  01:43  Saturn 2.2°S of Moon
    28  07     Delta-Aquarid Meteor Shower
    31  03:43  FULL MOON 

Aug 02  03:11  Moon at Perigee: 362135 km
    03  19:53  Moon at Descending Node 
    06  19:03  LAST QUARTER MOON 
    07  00     Mercury 0.5° of Jupiter
    07  10:25  Mercury 0.8°N of Regulus
    08  15     Venus at Aphelion 
    08  16:22  Aldebaran 0.7°S of Moon
    12  23     Perseid Meteor Shower
    14  07:54  NEW MOON 
    15  12     Venus at Inferior Conjunction 
    16  07:34  Mercury 2.0°N of Moon
    17  16:05  Moon at Ascending Node 
    17  19:33  Moon at Apogee: 405852 km
    19  10:46  Spica 4.2°S of Moon
    19  20:35  Mars 0.5°S of Beehive
    22  10:21  Saturn 2.6°S of Moon
    22  12:31  FIRST QUARTER MOON 
    26  14     Jupiter in Conjunction with Sun 
    29  11:35  FULL MOON 
    29  12     Mercury at Aphelion 
    30  08:24  Moon at Perigee: 358289 km
    31  03:16  Moon at Descending Node 
    31  19     Neptune at Opposition 

Sep 04  03     Mercury at Greatest Elong: 27.1°E
    04  22:09  Aldebaran 0.6°S of Moon
    05  02:54  LAST QUARTER MOON 
    09  22:53  Venus 2.7°S of Moon
    12  23:41  NEW MOON 
    12  23:54  Partial Solar Eclipse; mag=0.788
    13  21:38  Moon at Ascending Node 
    14  04:28  Moon at Apogee: 406466 km
    14  23:15  Mercury 5.3°S of Moon
    15  17:00  Spica 4.3°S of Moon
    18  19:54  Saturn 2.8°S of Moon
    21  01:59  FIRST QUARTER MOON 
    23  01:20  Autumnal Equinox 
    24  12:38  Mars 0.7°N of Regulus
    27  14:04  Moon at Descending Node 
    27  18:46  Moon at Perigee: 356877 km
    27  19:47  Total Lunar Eclipse; mag=1.276
    27  19:50  FULL MOON 
    30  08     Mercury at Inferior Conjunction 

Oct 02  05:51  Aldebaran 0.5°S of Moon
    04  14:06  LAST QUARTER MOON 
    08  13:32  Venus 0.7°N of Moon: Occn.
    08  14:52  Regulus 3.3°N of Moon
    08  17:26  Venus 2.5°S of Regulus
    09  09:51  Mars 3.4°N of Moon
    09  16:30  Jupiter 2.7°N of Moon
    11  03:54  Moon at Ascending Node 
    11  05:00  Mercury 1.0°N of Moon: Occn.
    11  06:17  Moon at Apogee: 406389 km
    11  20     Uranus at Opposition 
    12  11     Mercury at Perihelion 
    12  17:06  NEW MOON 
    15  20     Mercury at Greatest Elong: 18.1°W
    16  06:20  Saturn 3.0°S of Moon
    20  13:31  FIRST QUARTER MOON 
    21  16     Orionid Meteor Shower
    25  00:36  Moon at Descending Node 
    26  00     Venus at Greatest Elong: 46.4°W
    26  05:59  Moon at Perigee: 358464 km
    27  05:05  FULL MOON 
    29  15:45  Aldebaran 0.6°S of Moon

Nov 03  05:24  LAST QUARTER MOON 
    04  21:19  Regulus 3.2°N of Moon
    05  16     S Taurid Meteor Shower
    06  08:49  Jupiter 2.3°N of Moon
    07  02:56  Mars 1.8°N of Moon
    07  06:54  Venus 1.2°N of Moon
    07  08:53  Moon at Ascending Node 
    07  14:48  Moon at Apogee: 405724 km
    09  05:27  Spica 4.3°S of Moon
    11  10:47  NEW MOON 
    12  15     N Taurid Meteor Shower
    17  08     Mercury at Superior Conjunction 
    17  22     Leonid Meteor Shower
    18  23:27  FIRST QUARTER MOON 
    20  17     Mars at Aphelion 
    21  06:56  Moon at Descending Node 
    23  13:06  Moon at Perigee: 362818 km
    25  15:44  FULL MOON 
    26  02:33  Aldebaran 0.7°S of Moon
    28  23     Venus at Perihelion 
    29  12:20  Venus 3.9°N of Spica
    29  17     Saturn in Conjunction with Sun 

Dec 02  04:53  Regulus 3.0°N of Moon
    03  00:40  LAST QUARTER MOON 
    03  23:21  Jupiter 1.8°N of Moon
    04  11:33  Moon at Ascending Node 
    05  07:56  Moon at Apogee: 404800 km
    05  19:40  Mars 0.1°N of Moon: Occn.
    06  12:42  Spica 4.4°S of Moon
    07  09:55  Venus 0.7°S of Moon: Occn.
    11  03:29  NEW MOON 
    14  11     Geminid Meteor Shower
    17  23:01  Saturn 6.1°N of Antares
    18  08:13  Moon at Descending Node 
    18  08:14  FIRST QUARTER MOON 
    21  01:53  Moon at Perigee: 368418 km
    21  21:48  Winter Solstice 
    22  19     Ursid Meteor Shower
    23  07:18  Mars 3.3°N of Spica
    23  12:09  Aldebaran 0.7°S of Moon
    25  04:11  FULL MOON 
    28  20     Mercury at Greatest Elong: 19.7°E
    29  13:30  Regulus 2.7°N of Moon
    31  10:55  Jupiter 1.5°N of Moon
    31  13:19  Moon at Ascending Node 

    

Astronomical Definitions

  • Perihelion - the instant when a planet is closest to the Sun
  • Aphelion - the instant when a planet is furthest from the Sun
  • Perigee - the instant when the Moon is closest to Earth
  • Apogee - the instant when the Moon is furthest from Earth
  • Inferior Conjunction - the instant when a planet passes between Earth and the Sun (Mercury or Venus)
  • Superior Conjunction - the instant when a planet passes on the opposite side of the Sun from Earth (Mercury or Venus)
  • Greatest Elongation - elongation is the apparent angle between a planet and the Sun 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 - the instant when a planet appears opposite the Sun as seen from Earth
  • Conjunction - the instant when a planet appears closest the Sun as seen from Earth
  • Occultation - the Moon occults or eclipses a star or planet
  • Ascending Node - the point where a planet crosses from the southern to northern portion of its orbit
  • Descending Node - the point where a planet crosses from the northern to the southern portion of its orbit



Calendars for Other Years and Time Zones

The table below contains links to astronomical events calendars for a range of years and Time Zones. Abbreviations for the time zones are: GMT = Greenwich Mean Time, AST = Atlantic Standard Time, EST = Eastern Standard Time, CST = Central Standard Time, MST = Mountain Standard Time, PST = Pacific Standard Time, AKST = Alaskan Standard Time, and HST = Hawaiian Standard Time.

Calendar of Astronomical Events
GMT 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025
AST 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025
EST 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025
CST 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025
MST 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025
PST 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025
AKST 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025
HST 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025

For years or time zones not covered above, please visit SKYCAL the astronomical events calendar generator.

Accuracy

The times of astronomical events listed with a precision in hours and minutes (i.e., hh:mm) are accurate to the nearest minute. Similarly, the times of astronomical events listed with a precision in hours (i.e., hh) are accurate to the nearest hour.

A simplified solar ephemeris results an accuracy of ±0.5 hours for the perihelion and aphelion of Earth. The algorithm used in the perihelion and aphelion of the other planets is based on unperturbed elliptical orbits. For Mars, the accuracy is about 2 hours. Due to mutual planetary perturbations, the times for Jupiter may be in error by several weeks, while Saturn's times may be in error by a month. The times for Uranus and Neptune may be in error by several months. In the future, we plan to develop algorithms to improve the computed times of perihelion and aphelion of the planets.

Acknowledgements

All calculations are by Fred Espenak, and he assumes full responsibility for their accuracy. Algorithms used in predicting the phases of the Moon, eclipses and other sky phenomena 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:


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