Waning Gibbous on

Moon phase on 12 August 2017 Saturday is Waning Gibbous, 19 days old Moon is in Aries.

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Moon phase for

Lunar calendar 2017 | August 2017

Waning Gibbous phase
Waning Gibbous phase
Image credit: NASA/Goddard Space Flight Center Scientific Visualization Studio.

Waning Gibbous 77% illuminated

Waning Gibbous is the lunar phase on . Seen from Earth, illuminated fraction of the Moon surface is 77% and getting smaller. The 19 days old Moon is in ♈ Aries.

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Moon phases for next 7 days

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Moon phase and lunation details

4 days after Full Moon

Previous main lunar phase is the Full Moon before 4 days on 7 August 2017 at 18:11.

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.

Moon in ♈ Aries

Moon is passing about ∠17° of ♈ Aries tropical zodiac sector.

Apparent angular diameter ∠1917"

Lunar disc appears visually 1.2% wider than solar disc. Moon and Sun apparent angular diameters are ∠1917" and ∠1894".

Sturgeon Moon before 4 days

Next Full Moon is the Harvest Moon of September 2017 after 24 days on 6 September 2017 at 07:03.

Upcoming main Moon phases

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.

Lunation 217 / 1170

The Moon is 19 days old. Earth's natural satellite is moving from the middle to the last part of current synodic month. This is lunation 217 of Meeus index or 1170 from Brown series.

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Synodic month length 29.36 days

Length of current 217 lunation is 29 days, 8 hours and 45 minutes. It is 2 hours and 15 minutes shorter than next lunation 218 length.

Lunation length shorter than mean

Length of current synodic month is 3 hours and 59 minutes shorter than the mean length of synodic month, but it is still 2 hours and 10 minutes longer, compared to 21st century shortest.

Lunar orbit position on

True anomaly ∠27.9°

This New Moon true anomaly is ∠27.9°. At beginning of next synodic month true anomaly will be ∠49.5°. The length of upcoming synodic months will keep increasing since the true anomaly gets closer to the value of New Moon at point of apogee (∠180°).

Moon before perigee

9 days after point of apogee on 2 August 2017 at 17:55 in ♐ Sagittarius. The lunar orbit is getting closer, while the Moon is moving inward the Earth. It will keep this direction for the next 6 days, until it get to the point of next perigee on 18 August 2017 at 13:14 in ♋ Cancer.

Previous apogeeNext perigee

Distance to Moon 373 909 km

Moon is 373 909 km (232 336 mi) away from Earth on this date. Moon moves closer next 6 days until perigee, when Earth-Moon distance will reach 366 129 km (227 502 mi).

Moon after descending node

4 days after its descending node on 8 August 2017 at 10:56 in ♒ Aquarius, the Moon is following the southern part of its orbit for the next 8 days, until it will cross the ecliptic from South to North in ascending node on 21 August 2017 at 10:34 in ♌ Leo.

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Draconic month

18 days after beginning of current draconic month in ♍ Virgo, the Moon is moving from the second to the final part of it.

PreviousCurrent draconic monthNext

Moon before northern standstill

7 days after previous South standstill on 4 August 2017 at 18:17 in ♑ Capricorn, when Moon has reached southern declination of ∠-19.393°. Next 5 days the lunar orbit moves northward to face North declination of ∠19.381° in the next northern standstill on 18 August 2017 at 06:50 in ♋ Cancer.

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Syzygy in 9 days

After 9 days on 21 August 2017 at 18:30 in ♌ Leo, the Moon will be in New Moon geocentric conjunction with the Sun and this alignment forms next Sun-Moon-Earth syzygy.

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