First Quarter on

Moon phase on 17 August 2010 Tuesday is First Quarter, 8 days young Moon is in Sagittarius.

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Moon phase for

Lunar calendar 2010 | August 2010

First Quarter phase
First Quarter phase
Image credit: NASA/Goddard Space Flight Center Scientific Visualization Studio.

First Quarter 58% illuminated

First Quarter is the lunar phase on . Seen from Earth, illuminated fraction of the Moon surface is 58% and growing larger. The 8 days young Moon is in ♐ Sagittarius.

* The exact date and time of this First Quarter phase is on 16 August 2010 at 18:14 UTC.

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Moon phases for next 7 days

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Moon phase and lunation details

Moonrise and moonset

Moon rises at noon and sets at midnight. It is visible high in the southern sky in early evening.

Moon is entering ♐ Sagittarius

Moon is passing first ∠4° of ♐ Sagittarius tropical zodiac sector.

Apparent angular diameter ∠1874"

Lunar disc appears visually 1.1% narrower than solar disc. Moon and Sun apparent angular diameters are ∠1874" and ∠1895".

Sturgeon Moon after 7 days

Next Full Moon is the Sturgeon Moon of August 2010 after 7 days on 24 August 2010 at 17:05.

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 131 / 1084

The Moon is 8 days young. Earth's natural satellite is moving through the first part of current synodic month. This is lunation 131 of Meeus index or 1084 from Brown series.

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Synodic month length 29.31 days

Length of current 131 lunation is 29 days, 7 hours and 22 minutes. This is the year's shortest synodic month of 2010. It is 53 minutes shorter than next lunation 132 length.

Lunation length shorter than mean

Length of current synodic month is 5 hours and 22 minutes shorter than the mean length of synodic month, but it is still 47 minutes longer, compared to 21st century shortest.

Lunar orbit position on

True anomaly ∠349.5°

This New Moon true anomaly is ∠349.5°. At beginning of next synodic month true anomaly will be ∠4.6°. 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 after perigee

6 days after point of perigee on 10 August 2010 at 17:56 in ♌ Leo. The lunar orbit is getting wider, while the Moon is moving outward the Earth. It will keep this direction for the next 7 days, until it get to the point of next apogee on 25 August 2010 at 05:51 in ♓ Pisces.

Previous perigeeNext apogee

Distance to Moon 382 525 km

Moon is 382 525 km (237 690 mi) away from Earth on this date. Moon moves farther next 7 days until apogee, when Earth-Moon distance will reach 406 390 km (252 519 mi).

Moon before ascending node

9 days after its descending node on 7 August 2010 at 17:24 in ♋ Cancer, the Moon is following the southern part of its orbit for the next 3 days, until it will cross the ecliptic from South to North in ascending node on 20 August 2010 at 12:13 in ♑ Capricorn.

Previous nodeNext node

Draconic month

24 days after beginning of current draconic month in ♑ Capricorn, the Moon is moving from the second to the final part of it.

PreviousCurrent draconic monthNext

Moon before southern standstill

11 days after previous North standstill on 6 August 2010 at 02:49 in ♊ Gemini, when Moon has reached northern declination of ∠24.984°. Next day the lunar orbit moves southward to face South declination of ∠-24.929° in the next southern standstill on 18 August 2010 at 17:07 in ♐ Sagittarius.

Previous standstillNext standstill

Syzygy in 7 days

After 7 days on 24 August 2010 at 17:05 in ♒ Aquarius, the Moon will be in Full Moon geocentric opposition with the Sun and this alignment forms next Sun-Earth-Moon syzygy.

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