2017Calendar of Astronomical Events

    

2017Phases of the Moon

Hawaiian Standard Time

The following table gives the date and time of the Moon's phases for the year. The times listed are for Hawaiian Standard Time(Greenwich Mean Time - 10 hours).If Daylight Saving Time is in effect, add one hour to the times listed.

2017 Phases of the Moon
Hawaiian Standard Time
New Moon First Quarter Full Moon Last Quarter
- Jan 5 09:47 Jan 12 01:34 Jan 19 12:14
Jan 27 14:07 Feb 3 18:19 Feb 10 14:33 n Feb 18 09:33
Feb 26 04:58 A Mar 5 01:32 Mar 12 04:54 Mar 20 05:58
Mar 27 16:57 Apr 3 08:39 Apr 10 20:08 Apr 18 23:57
Apr 26 02:16 May 2 16:47 May 10 11:43 May 18 14:33
May 25 09:44 Jun 1 02:42 Jun 9 03:10 Jun 17 01:33
Jun 23 16:31 Jun 30 14:51 Jul 8 18:07 Jul 16 09:26
Jul 22 23:46 Jul 30 05:23 Aug 7 08:11 p Aug 14 15:15
Aug 21 08:30 T Aug 28 22:13 Sep 5 21:03 Sep 12 20:25
Sep 19 19:30 Sep 27 16:54 Oct 5 08:40 Oct 12 02:25
Oct 19 09:12 Oct 27 12:22 Nov 3 19:23 Nov 10 10:37
Nov 18 01:42 Nov 26 07:03 Dec 3 05:47 Dec 9 21:51
Dec 17 20:31 Dec 25 23:20 --

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.


2017Calendar of Astronomical Events

Hawaiian Standard Time

The following table gives the date and time of the important astronomical events for the year. The times listed are for Hawaiian Standard Time(Greenwich Mean Time - 10 hours).If Daylight Saving Time is in effect, add one hour to the times listed. A key to astronomical terms appears below the calendar.

2017Calendar of Astronomical Events
Hawaiian Standard Time
January - June July - December
Date     HST   Event        (h:m)Jan 01  23:20  Venus 1.9°S of Moon    02  08:14  Moon at Descending Node     02  20:47  Mars 0.2°S of Moon: Occn.    03  04     Quadrantid Meteor Shower    04  05     Earth at Perihelion: 0.98331 AU    05  09:47  FIRST QUARTER MOON     08  23     Mercury 6.7°N of Saturn    09  04:07  Aldebaran 0.4°S of Moon    09  20:07  Moon at Perigee: 363242 km    12  01:34  FULL MOON     12  03     Venus at Greatest Elong: 47.1°E    13  03:59  Beehive 3.9°N of Moon    14  18:07  Regulus 0.9°N of Moon    15  00:44  Moon at Ascending Node     18  19:26  Jupiter 2.7°S of Moon    19  00     Mercury at Greatest Elong: 24.1°W    19  12:14  LAST QUARTER MOON     21  14:14  Moon at Apogee: 404913 km    24  00:37  Saturn 3.6°S of Moon    25  14:46  Mercury 3.7°S of Moon    27  14:07  NEW MOON     29  12:21  Moon at Descending Node     31  03:11  Jupiter 3.5°N of Spica    31  04:34  Venus 4.1°N of Moon    31  15:09  Mars 2.3°N of MoonFeb 02  03     Venus 5.4°N of Mars    03  18:19  FIRST QUARTER MOON     05  11:14  Aldebaran 0.2°S of Moon    06  03:59  Moon at Perigee: 368817 km    07  04     Mercury at Aphelion     09  13:46  Beehive 3.9°N of Moon    10  14:33  FULL MOON     10  14:44  Pen. Lunar Eclipse; mag=0.988    11  04:04  Regulus 0.8°N of Moon    11  09:49  Moon at Ascending Node     15  04:55  Jupiter 2.7°S of Moon    16  21     Jupiter at Aphelion:  5.45652 AU    18  09:33  LAST QUARTER MOON     18  11:14  Moon at Apogee: 404376 km    20  06     Venus at Perihelion     20  13:44  Saturn 3.6°S of Moon    25  20:28  Moon at Descending Node     26  04:53  Annular Solar Eclipse; mag=0.992    26  04:58  NEW MOON Mar 01  08:58  Mars 4.3°N of Moon    01  16     Neptune in Conjunction with Sun     02  21:24  Moon at Perigee: 369065 km    04  16:38  Aldebaran 0.2°S of Moon    05  01:32  FIRST QUARTER MOON     06  14     Mercury at Superior Conjunction     08  21:12  Beehive 3.9°N of Moon    10  12:20  Regulus 0.8°N of Moon    10  18:17  Moon at Ascending Node     12  04:54  FULL MOON     14  10:04  Jupiter 2.5°S of Moon    18  07:25  Moon at Apogee: 404651 km    20  00:29  Vernal Equinox     20  00:49  Saturn 3.4°S of Moon    20  05:58  LAST QUARTER MOON     23  04     Mercury at Perihelion     25  01     Venus at Inferior Conjunction     25  05:41  Moon at Descending Node     27  16:57  NEW MOON     30  02:39  Moon at Perigee: 363855 km    30  03:03  Mars 5.5°N of Moon    31  22:50  Aldebaran 0.3°S of MoonApr 01  00     Mercury at Greatest Elong: 19.0°E    03  08:39  FIRST QUARTER MOON     05  02:45  Beehive 3.8°N of Moon    06  18:30  Regulus 0.7°N of Moon    06  23:14  Moon at Ascending Node     07  11     Jupiter at Opposition     10  11:20  Jupiter 2.2°S of Moon    10  20:08  FULL MOON     13  20     Uranus in Conjunction with Sun     15  00:05  Moon at Apogee: 405478 km    16  08:39  Saturn 3.2°S of Moon    18  23:57  LAST QUARTER MOON     19  20     Mercury at Inferior Conjunction     20  22:16  Mars 3.4°S of Pleiades    21  12:30  Moon at Descending Node     22  02     Lyrid Meteor Shower    23  07:59  Venus 5.2°N of Moon    26  02:16  NEW MOON     27  06:18  Moon at Perigee: 359325 km    28  07:19  Aldebaran 0.5°S of MoonMay 02  08:23  Beehive 3.6°N of Moon    02  16:47  FIRST QUARTER MOON     03  23:49  Regulus 0.5°N of Moon    04  00:42  Moon at Ascending Node     04  15     Eta-Aquarid Meteor Shower    05  03:51  Mars 6.1°N of Aldebaran    07  11:24  Jupiter 2.1°S of Moon    10  11:43  FULL MOON     12  09:51  Moon at Apogee: 406212 km    13  13:07  Saturn 3.1°S of Moon    17  13     Mercury at Greatest Elong: 25.8°W    18  14:33  LAST QUARTER MOON     18  15:30  Moon at Descending Node     22  02:32  Venus 2.4°N of Moon    23  15:20  Mercury 1.6°N of Moon    25  09:44  NEW MOON     25  15:23  Moon at Perigee: 357210 km    29  15:50  Beehive 3.4°N of Moon    31  01:56  Moon at Ascending Node     31  06:08  Regulus 0.3°N of MoonJun 01  02:42  FIRST QUARTER MOON     03  01     Venus at Greatest Elong: 45.9°W    03  13:57  Jupiter 2.3°S of Moon    06  17:19  Mercury 5.3°S of Pleiades    08  12:21  Moon at Apogee: 406402 km    09  03:10  FULL MOON     09  15:25  Saturn 3.1°S of Moon    12  14     Venus at Aphelion     14  16:40  Moon at Descending Node     14  23     Saturn at Opposition     17  01:33  LAST QUARTER MOON     19  03     Mercury at Perihelion     20  11:13  Venus 2.4°N of Moon    20  18:25  Summer Solstice     21  04     Mercury at Superior Conjunction     22  04:23  Aldebaran 0.5°S of Moon    23  00:49  Moon at Perigee: 357938 km    23  16:31  NEW MOON     26  01:18  Beehive 3.2°N of Moon    27  06:26  Moon at Ascending Node     27  14:26  Regulus 0.1°N of Moon    30  14:51  FIRST QUARTER MOON     30  21:28  Jupiter 2.7°S of Moon
Date     HST   Event        (h:m)Jul 03  10     Earth at Aphelion: 1.01668 AU    04  14:21  Venus 6.5°S of Pleiades    05  18:27  Moon at Apogee: 405934 km    06  17:34  Saturn 3.2°S of Moon    08  18:07  FULL MOON     09  15:33  Mercury 0.1°N of Beehive    11  19:17  Moon at Descending Node     13  08:03  Venus 3.1°N of Aldebaran    16  09:26  LAST QUARTER MOON     19  13:37  Aldebaran 0.4°S of Moon    20  01:13  Venus 2.7°N of Moon    21  07:09  Moon at Perigee: 361238 km    22  23:46  NEW MOON     24  14:46  Moon at Ascending Node     24  22:49  Mercury 0.9°S of Moon: Occn.    25  00:14  Regulus 0.0°S of Moon    25  07:03  Mercury 0.8°S of Regulus    26  14     Mars in Conjunction with Sun     27  17     Delta-Aquarid Meteor Shower    28  10:15  Jupiter 3.1°S of Moon    29  18     Mercury at Greatest Elong: 27.2°E    30  05:23  FIRST QUARTER MOON Aug 02  03     Mercury at Aphelion     02  07:55  Moon at Apogee: 405026 km    02  21:31  Saturn 3.5°S of Moon    07  08:11  FULL MOON     07  08:20  Partial Lunar Eclipse; mag=0.246    08  00:56  Moon at Descending Node     12  09     Perseid Meteor Shower    14  15:15  LAST QUARTER MOON     15  20:39  Aldebaran 0.4°S of Moon    18  03:14  Moon at Perigee: 366129 km    18  18:45  Venus 2.2°N of Moon    19  21:15  Beehive 3.2°N of Moon    20  08:08  Venus 7.2°S of Pollux    21  00:34  Moon at Ascending Node     21  08:26  Total Solar Eclipse; mag=1.031    21  08:30  NEW MOON     25  03:00  Jupiter 3.5°S of Moon    26  11     Mercury at Inferior Conjunction     28  22:13  FIRST QUARTER MOON     30  01:25  Moon at Apogee: 404307 km    30  04:23  Saturn 3.6°S of Moon    31  20:08  Venus 1.4°S of BeehiveSep 04  08:41  Moon at Descending Node     04  14     Mercury 3.2°S of Mars    04  18     Neptune at Opposition     05  21:03  FULL MOON     09  19:30  Mercury 0.7°S of Regulus    10  11:44  Jupiter 2.9°N of Spica    12  00     Mercury at Greatest Elong: 17.9°W    12  02:09  Aldebaran 0.4°S of Moon    12  20:25  LAST QUARTER MOON     13  06:04  Moon at Perigee: 369856 km    15  02     Mercury at Perihelion     16  04:50  Beehive 3.1°N of Moon    16  08     Mercury 0.1°N of Mars    17  08:28  Moon at Ascending Node     17  14:56  Venus 0.5°N of Moon: Occn.    17  18:32  Regulus 0.1°S of Moon    18  13:22  Mercury 0.0°N of Moon: Occn.    19  11:30  Venus 0.4°N of Regulus    19  19:30  NEW MOON     21  21:51  Jupiter 3.7°S of Moon    22  10:02  Autumnal Equinox     26  14:09  Saturn 3.5°S of Moon    26  20:49  Moon at Apogee: 404342 km    27  16:54  FIRST QUARTER MOON Oct 01  16:05  Moon at Descending Node     02  23     Venus at Perihelion     05  06     Venus 0.2°N of Mars    05  08:40  FULL MOON     07  12     Mars at Aphelion:  1.66609 AU    08  11     Mercury at Superior Conjunction     08  19:51  Moon at Perigee: 366858 km    09  08:05  Aldebaran 0.6°S of Moon    12  02:25  LAST QUARTER MOON     13  10:29  Beehive 3.0°N of Moon    14  12:10  Moon at Ascending Node     15  00:54  Regulus 0.2°S of Moon    17  00:04  Mars 1.8°S of Moon    17  14:21  Venus 2.0°S of Moon    19  07     Uranus at Opposition     19  09:12  NEW MOON     21  01     Orionid Meteor Shower    24  01:54  Saturn 3.3°S of Moon    24  16:25  Moon at Apogee: 405151 km    26  08     Jupiter in Conjunction with Sun     27  12:22  FIRST QUARTER MOON     28  20:41  Moon at Descending Node Nov 02  03:58  Venus 3.3°N of Spica    03  19:23  FULL MOON     05  01     S Taurid Meteor Shower    05  14:09  Moon at Perigee: 361438 km    05  16:19  Aldebaran 0.8°S of Moon    09  15:58  Beehive 2.7°N of Moon    10  10:37  LAST QUARTER MOON     10  12:40  Moon at Ascending Node     11  06:07  Regulus 0.4°S of Moon    12  01     N Taurid Meteor Shower    12  07:50  Mercury 2.2°N of Antares    12  22     Venus 0.3°N of Jupiter    14  14:40  Mars 3.2°S of Moon    17  07     Leonid Meteor Shower    18  01:42  NEW MOON     20  14:34  Saturn 3.0°S of Moon    21  08:52  Moon at Apogee: 406132 km    23  14     Mercury at Greatest Elong: 22.0°E    24  22:22  Moon at Descending Node     26  07:03  FIRST QUARTER MOON     29  04:30  Mars 2.9°N of SpicaDec 03  03:00  Aldebaran 0.8°S of Moon    03  05:47  FULL MOON     03  22:42  Moon at Perigee: 357496 km    06  14     Mercury 1.3°S of Saturn    06  23:30  Beehive 2.5°N of Moon    07  14:39  Moon at Ascending Node     08  12:25  Regulus 0.7°S of Moon    09  21:51  LAST QUARTER MOON     12  02     Mercury at Perihelion     12  16     Mercury at Inferior Conjunction     13  06:27  Mars 4.2°S of Moon    13  20     Geminid Meteor Shower    14  04:26  Jupiter 4.2°S of Moon    17  20:31  NEW MOON     18  15:27  Moon at Apogee: 406605 km    21  06:29  Winter Solstice     21  10     Saturn in Conjunction with Sun     22  00:04  Moon at Descending Node     22  05     Ursid Meteor Shower    25  23:20  FIRST QUARTER MOON     30  14:25  Aldebaran 0.7°S of Moon    

Terms Used in Astronomical Events Calendar

  • 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
  • Beehive - bright star cluster in the constellation Cancer

Calendars of Astronomical Events: 2011 to 2020

The Americas

Below are links to calendars of astronomical events from 2011 to 2020 for seven time zones in the Americas.
Choose a time zone and click on a year to get a calendar of astronomical events for that year.

Calendars of Astronomical Events - The Americas
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

        Time Zones Abbreviations
        • AST = Atlantic Standard Time (= GMT - 4 hours)
        • EST = Eastern Standard Time (= GMT - 5 hours)
        • CST = Central Standard Time (= GMT - 6 hours)
        • MST = Mountain Standard Time (= GMT - 7 hours)
        • PST = Pacific Standard Time (= GMT - 8 hours)
        • AKST = Alaskan Standard Time (= GMT - 9 hours)
        • HST = Hawaiian Standard Time (= GMT - 10 hours)
          (where GMT = Greenwich Mean Time)

A time zone may have a different name in different countries. Note the difference in hours between a given time zone and Greenwich Mean Time to help in identification.

For other years and other time zones, visit: Calendars of Astronomical Events.

Accuracy of the Astronomical Events Calendars

The goal of the Astronomical Events Calendars 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 Astronomical Events Calendars
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

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:


Return to: Calendars of Astronomical Events

Return to: Planetary Ephemeris Data