Waning Gibbous Moon
Waning Gibbous MoonImage credit: NASA/Goddard Space Flight Center Scientific Visualization Studio.(large image)

Waning Gibbous in Aries

Waning Gibbous on . Illuminated surface of the Moon is 93% and getting smaller. Lunar cycle is 17 days old.

Moonrise and moonset

Moon rises in the evening and sets in the morning. It is visible to the southwest and it is high in the sky after midnight.

Upcoming main moon phases

Main moon phases of the following lunar cycle.

Moon phase and lunation details

Moon in ♈ Aries

Moon is passing about ∠5° of ♈ Aries tropical zodiac sector.

2 days after Full Moon

Previous main lunar phase is the Full Moon before 2 days on 24 August 2010 at 17:05.

Sturgeon Moon before 2 days

Next Full Moon is the Harvest Moon of September 2010 after 26 days on 23 September 2010 at 09:17.

Neap tide

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.

Apparent angular diameter ∠1779"

Lunar disc appears visually 6.5% narrower than solar disc. Moon and Sun apparent angular diameters are ∠1779" and ∠1899".

Lunation 131 / 1084

The Moon is 17 days old and navigating from the middle to the last part of the current synodic month. This is lunation 131 of Meeus index or 1084 from Brown series.

Synodic month length 29.31 days

The length of this lunation is 29 days, 7 hours and 22 minutes and it is 53 minutes shorter than the upcoming lunation's length. This is the year's shortest synodic month of 2010. 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°).

Lunation length shorter than mean

The length of the current synodic month is 5 hours and 22 minutes shorter than the mean synodic month length. It is 47 minutes longer compared to 21st century's shortest synodic month length.

Lunar orbit details for

True anomaly ∠349.5°

The true anomaly of the Moon orbit at the beginning of this lunation cycle is ∠349.5° and at the beginning of the next lunar synodic month the true anomaly is going to be ∠4.6°.

Moon after apogee

2 days since point of apogee on 25 August 2010 at 05:51 in ♓ Pisces the lunar orbit is getting narrow while the Moon is moving towards the Earth. It will keep this direction over the next 11 days until the Moon reaches the point of next perigee on 8 September 2010 at 04:00 in ♍ Virgo.

Distance to Moon 402 890 km

The Moon is 402 890 km (250 344 mi) away from Earth and getting closer over the next 11 days until the point perigee when Earth-Moon distance is going to be 357 193 km (221 949 mi).

Moon after ascending node

6 days after ascending node on 20 August 2010 at 12:13 in ♑ Capricorn the Moon is positioned north of the ecliptic over the following 7 days until the lunar crosses the ecliptic again from North to South in descending node on 4 September 2010 at 00:16 in ♋ Cancer.

Moon before northern standstill

8 days since the last southern standstill on 18 August 2010 at 17:07 in ♐ Sagittarius when the Moon has reached South declination of ∠-24.929° the lunar orbit is extending northward over the next 5 days to face maximum declination of ∠24.807° at the point of next northern standstill on 2 September 2010 at 11:20 in ♊ Gemini.

Draconic month

6 days since the beginning of this draconic month in ♑ Capricorn the Moon is navigating from the beginning to the first part of the lunar cycle.

Syzygy in 11 days

In 11 days on 8 September 2010 at 10:30 in ♍ Virgo the Moon is going to be in a New Moon geocentric conjunction with the Sun and thus forming the next Sun-Moon-Earth syzygy alignment.

Lunar calendar

Sources and credits

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