The following table gives the date and time of important astronomical events for December 2017.
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 2017 ------ ----- -------------------------------------------- (h:m) Dec 03 13:00 Aldebaran 0.8°S of Moon Dec 03 15:47 FULL MOON Dec 04 08:42 Moon at Perigee: 357496 km Dec 07 00 Mercury 1.3° of Saturn Dec 07 09:30 Beehive 2.5°N of Moon Dec 08 00:39 Moon at Ascending Node Dec 08 22:25 Regulus 0.7°S of Moon Dec 10 07:51 LAST QUARTER MOON Dec 12 12 Mercury at Perihelion Dec 13 02 Mercury at Inferior Conjunction Dec 13 16:27 Mars 4.2°S of Moon Dec 14 06 Geminid Meteor Shower Dec 14 14:26 Jupiter 4.2°S of Moon Dec 18 06:31 NEW MOON Dec 19 01:27 Moon at Apogee: 406605 km Dec 21 16:29 Winter Solstice Dec 21 20 Saturn in Conjunction with Sun Dec 22 10:04 Moon at Descending Node Dec 22 15 Ursid Meteor Shower Dec 26 09:20 FIRST QUARTER MOON Dec 31 00:25 Aldebaran 0.7°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 eight time zones are available through the links below.
|Time Zones||Calendars of Astronomical Events|
|Greenwich Mean Time||2017||2018||2019||2020||2021||2022|
|Atlantic Standard Time||2017||2018||2019||2020||2021||2022|
|Eastern Standard Time||2017||2018||2019||2020||2021||2022|
|Central Standard Time||2017||2018||2019||2020||2021||2022|
|Mountain Standard Time||2017||2018||2019||2020||2021||2022|
|Pacific Standard Time||2017||2018||2019||2020||2021||2022|
|Alaska Standard Time||2017||2018||2019||2020||2021||2022|
|Hawaii Standard Time||2017||2018||2019||2020||2021||2022|
For additional years, see Calendars of Astronomical Events.
The astronomical highlight of 2017 is the Great American Total Solar Eclipse on August 21. This is the first total eclipse visible from the continental USA in 38 years. For complete details on this highly anticipated event, see: 2017 Total Solar Eclipse (EclipseWise.com).
For information on all solar and lunar eclipses this year, see: Eclipses During 2017.
The Calendars of Astronomical Events were all generated by a computer program I wrote (with THINK Pascal running on a Macintosh G4) using Astronomical Algorithms (Jean Meeus).
- More Information
- Sky Events Calendar (AstroPixels.com)
- This Week’s Sky at a Glance (Sky & Telescope)
- Heavens Above
- Cal Sky
- Star Date
- Eclipses During 2017 (EclipseWise.com)
- 2017 Total Solar Eclipse (EclipseWise.com)
- Additional Astronomical Events
- Solstices and Equinoxes: 2001 to 2100 (GMT)
- Perihelion and Aphelion: 2001 to 2100 (GMT)
- Phases of the Moon: 2001 to 2100 (Greenwich Mean Time)
- Full Moon at Perigee (Super Moon): 2001 to 2100 (GMT)
- More Astronomical Data (AstroPixels.com)
- Solar and Lunar Eclipses (EclipseWise.com)