Quarter ♐ Sagittarius
Moon phase on 4 September 2011 Sunday is First Quarter, 7 days young Moon is in Sagittarius.Share this page: twitter facebook linkedin
First Quarter is the lunar phase on . Seen from Earth, illuminated fraction of the Moon surface is 47% and growing larger. The 7 days young Moon is in ♐ Sagittarius.
* The exact date and time of this First Quarter phase is on 4 September 2011 at 17:39 UTC.
Moon rises at noon and sets at midnight. It is visible high in the southern sky in early evening.
Moon is passing about ∠9° of ♐ Sagittarius tropical zodiac sector.
Lunar disc appears visually 1.7% wider than solar disc. Moon and Sun apparent angular diameters are ∠1936" and ∠1903".
Next Full Moon is the Harvest Moon of September 2011 after 7 days on 12 September 2011 at 09:27.
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.
The Moon is 7 days young. Earth's natural satellite is moving through the first part of current synodic month. This is lunation 144 of Meeus index or 1097 from Brown series.
Length of current 144 lunation is 29 days, 8 hours and 5 minutes. This is the year's shortest synodic month of 2011. It is 42 minutes shorter than next lunation 145 length.
Length of current synodic month is 4 hours and 39 minutes shorter than the mean length of synodic month, but it is still 1 hour and 30 minutes longer, compared to 21st century shortest.
This lunation true anomaly is ∠333.4°. At the beginning of next synodic month true anomaly will be ∠350.1°. The length of upcoming synodic months will keep decreasing since the true anomaly gets closer to the value of New Moon at point of perigee (∠0° or ∠360°).
4 days after point of perigee on 30 August 2011 at 17:35 in ♍ Virgo. The lunar orbit is getting wider, while the Moon is moving outward the Earth. It will keep this direction for the next 10 days, until it get to the point of next apogee on 15 September 2011 at 06:23 in ♈ Aries.
Moon is 370 232 km (230 051 mi) away from Earth on this date. Moon moves farther next 10 days until apogee, when Earth-Moon distance will reach 406 068 km (252 319 mi).
11 days after its descending node on 23 August 2011 at 17:23 in ♊ Gemini, the Moon is following the southern part of its orbit for the next day, until it will cross the ecliptic from South to North in ascending node on 5 September 2011 at 07:36 in ♐ Sagittarius.
26 days after beginning of current draconic month in ♐ Sagittarius, the Moon is moving from the second to the final part of it.
11 days after previous North standstill on 23 August 2011 at 12:17 in ♊ Gemini, when Moon has reached northern declination of ∠23.149°. Next day the lunar orbit moves southward to face South declination of ∠-23.047° in the next southern standstill on 5 September 2011 at 05:01 in ♐ Sagittarius.
After 7 days on 12 September 2011 at 09:27 in ♓ Pisces, the Moon will be in Full Moon geocentric opposition with the Sun and this alignment forms next Sun-Earth-Moon syzygy.