First Quarter on . The illuminated surface of the moon is 56% and growing larger. The lunar cycle is 8 days young.
* The exact date and time of this First Quarter phase is on 17 February 2013 at 20:31 UTC.
The moon rises at noon and sets at midnight. It is visible high in the southern sky in early evening.
Slide horizontally to discover the moon phase on nearby dates.
Main moon phases of the following lunar cycle.
Moon is passing about ∠7° of ♊ Gemini tropical zodiac sector.
Next Full Moon is the Snow Moon of February 2013 after 7 days on 25 February 2013 at 20:26.
There is medium ocean tide on this date. Sun and Moon gravitational forces are not aligned, but meet at very acute angle, so their combined tidal force is moderate.
Lunar disc appears visually 9.2% narrower than solar disc. Moon and Sun apparent angular diameters are ∠1769" and ∠1941".
The Moon is 8 days young and navigating through the first part of the current synodic month. This is lunation 162 of Meeus index or 1115 from Brown series.
The length of this lunation is 29 days, 12 hours and 31 minutes and it is 1 hour and 13 minutes shorter than the upcoming lunation's length. The lengths of the following synodic months are going to increase with the lunar orbit true anomaly getting closer to the value it has at the point of New Moon at apogee (∠180°).
The length of the current synodic month is 13 minutes shorter than the mean synodic month length. It is 5 hours and 56 minutes longer compared to 21st century's shortest synodic month length.
The true anomaly of the Moon orbit at the beginning of this lunation cycle is ∠44.2° and at the beginning of the next lunar synodic month the true anomaly is going to be ∠73.6°.
10 days since point of perigee on 7 February 2013 at 12:09 in ♑ Capricorn the lunar orbit is getting widen while the Moon is moving away from the Earth. It will keep this direction over the next day until the Moon reaches the point of next apogee on 19 February 2013 at 06:30 in ♊ Gemini.
The Moon is 405 085 km (251 708 mi) away from Earth and getting further over the next day until the point apogee when Earth-Moon distance is going to be 404 475 km (251 329 mi).
1 day after descending node on 17 February 2013 at 02:57 in ♉ Taurus the Moon is positioned south of the ecliptic over the following 12 days until the lunar crosses the ecliptic again from South to North in ascending node on 3 March 2013 at 02:30 in ♏ Scorpio.
12 days since the last southern standstill on 6 February 2013 at 00:27 in ♐ Sagittarius when the Moon has reached South declination of ∠-20.704° the lunar orbit is extending northward over the next day to face maximum declination of ∠20.583° at the point of next northern standstill on 19 February 2013 at 13:35 in ♊ Gemini.
14 days since the beginning of this draconic month in ♏ Scorpio the Moon is navigating from the second to the final part of the lunar cycle.
In 7 days on 25 February 2013 at 20:26 in ♍ Virgo the Moon is going to be in a Full Moon geocentric opposition with the Sun and thus forming the next Sun-Earth-Moon syzygy alignment.
Parts of this Lunar Calendar are based on Planetary Ephemeris Data Courtesy of Fred Espenak, www.Astropixels.com
Moon phase image credit to NASA/Goddard Space Flight Center Scientific Visualization Studio, svs.gsfc.nasa.gov