First Quarter on . The illuminated surface of the moon is 45% and growing larger. The lunar cycle is 7 days young.
* The exact date and time of this First Quarter phase is on 11 October 2013 at 23:02 UTC.
The moon rises in the morning and sets in the evening. It is visible toward the southwest 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 ∠12° of ♑ Capricorn tropical zodiac sector.
Next Full Moon is the Hunter Moon of October 2013 after 7 days on 18 October 2013 at 23:38.
There is low ocean tide on this date. Sun and Moon gravitational forces are not aligned, but meet at big angle, so their combined tidal force is weak.
Lunar disc appears visually 2.6% wider than solar disc. Moon and Sun apparent angular diameters are ∠1973" and ∠1923".
The Moon is 7 days young and navigating through the first part of the current synodic month. This is lunation 170 of Meeus index or 1123 from Brown series.
The length of this lunation is 29 days, 12 hours and 15 minutes and it is 43 minutes longer than the upcoming lunation's length. The lengths of the following synodic months are going to decrease with the lunar orbit true anomaly getting closer to the value it has at the point of New Moon at perigee (∠0° or ∠360°).
The length of the current synodic month is 29 minutes shorter than the mean synodic month length. It is 5 hours and 40 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 ∠285.3° and at the beginning of the next lunar synodic month the true anomaly is going to be ∠315°.
1 day since point of perigee on 10 October 2013 at 23:06 in ♐ Sagittarius the lunar orbit is getting widen while the Moon is moving away from the Earth. It will keep this direction over the next 14 days until the Moon reaches the point of next apogee on 25 October 2013 at 14:25 in ♋ Cancer.
The Moon is 363 303 km (225 746 mi) away from Earth and getting further over the next 14 days until the point apogee when Earth-Moon distance is going to be 404 561 km (251 383 mi).
4 days after ascending node on 6 October 2013 at 22:08 in ♏ Scorpio the Moon is positioned north of the ecliptic over the following 8 days until the lunar crosses the ecliptic again from North to South in descending node on 19 October 2013 at 21:47 in ♉ Taurus.
1 day since the last southern standstill on 9 October 2013 at 23:52 in ♐ Sagittarius when the Moon has reached South declination of ∠-19.537° the lunar orbit is extending northward over the next 11 days to face maximum declination of ∠19.509° at the point of next northern standstill on 23 October 2013 at 09:13 in ♊ Gemini.
4 days since the beginning of this draconic month in ♏ Scorpio the Moon is navigating from the beginning to the first part of the lunar cycle.
In 7 days on 18 October 2013 at 23:38 in ♈ Aries 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