SUPERTROPICAL FULL MOON

The Full Moon on June 1, 2007 was particularly brilliant, than the full moon was appeared very bright. The same thing happened the night of Saturday 30 of that month.The reason is that the full moon of that month flew over the southern regions that can be achieved, illuminating landscapes where seldom visited by this star. On 1 and 30 reached the Moon Lunar Tropic of Sagittarius, the southernmost latitude that can be achieved, equivalent to the Sun Tropic of Capricorn, at latitude 23.44 degrees south.

For Supertropical we mean that the full moon occurs when flies latitudes south of the Tropic of Capricorn.

 Full Moons are also supertropicales in the northern hemisphere, occurring as it passes over higher latitudes than the Tropic of Cancer, latitude 23.44 degrees north.

This phenomenon occurs because the orbit of the Moon does not completely coincide with the ecliptic, with which he has an average slope of 5 degrees and 9 minutes (which does not possess eclipses every month). This means that the Moon transits to 5.15 degrees south of the decline for the Tropic of Capricorn, dec. 23.44 degrees south (-23.44 degrees), reaching to spend about 28.59 degrees south latitude and 28.59 degrees north respectively.

As at the time of Winter Solstice, which will occur on June 21, we need the ecliptic reaches its lowest point in the day and higher at night, is only in this time when they can be Supertropicales Full Moons.

Although every month the Moon passes at some point over all latitudes are between 28.59 degrees south latitude and 28.59 degrees north, my Klaus planetarium program showed me that these extreme latitudes reaches its full moon phase, only every 19 years. That is to spend all that time to the occurrence of this kind of Solstice moon night, we may well, for lack of not knowing other name, call Supertropical full moon. The next of these moons occur in the southern hemisphere, the 21 June 2025.

In the month of June and every 19 years or every 18 years and 10 days, the conditions for us to have a full moon Supertropical, the southernmost Full Moon of all.

The reason is that the full moon hovers over the southernmost regions that can be achieved, illuminating landscapes where this occurs rarely. It happened in June 2007, when on Sunday 11th of that month reached the Tropic of Sagittarius Moon, this is the southernmost latitude that can be achieved, equivalent to the tropics of Capricorn Full Moon phase. At such times the Moon passes in front of the constellation Sagittarius.The ecliptic at night is at its southernmost position in the southern sky, this happens in June.The moon passes through its southernmost position in full phase. This point is 5 ° south of the ecliptic, southern Lower internodes.

Adding all these elements has a full moon hovering over the latitude 28 degrees 34.5 minutes south, in Chile are at latitude between the cities of Copepod and Valeant. We can call this line: Lunar Tropic of Sagittarius.

This happened with the Full Moon 1 and June 30, 2007. Then the Full Moon will go away from that point and will not pass that up to 18 years and 10 (11) days later, on June 21, 2025 ( Saros Cycle ) and 19 years ( Metonic cycle ), 11 June 2025.

When that happens the people of the southern hemisphere can see that the Full Moon of June are particularly bright, even in the days before full moon, it appears very bright.

What would argue the ancient inhabitants of South America when the moon coincided well with the Inti Raimi / Wetripantu, as occurred in 2005 and will occur by 2024?

If we add to this that the Moon is passing through its perigee, then we have the Mother of all the full moons, so it was full moon Supertropical 2005.

The approach and departure of the Moon for this position is gradual, so as the year 2008 but will not reach its southernmost point, the moon will fly by. For these extraordinary Full Moon, the lunar luminosity increases over a landscape unaccustomed to observe the full moon overhead.

Fred Espenak, known in the trade as Dr. Eclipse , and the leading expert on eclipses from NASA, whose website is a permanent source of information that will hopefully never be finished, we said personally that this period of 19 years, which Moon phase is repeated on the day of the year is called Metonic Cycle, "which is to the calendar day and the synodic cycle (phases)."

What was also remarkable that 2005 full moon occurred the day after the moon had passed its perigee, its closest point to Earth. Hence its enormous size and great luminosity.

In fact every lunar month the moon passes at some point by the Lower South and North inter nodes.

NOTE: The Metonic cycle, was discovered by the Greek astronomer Meton, the V century BC it found that moon phase cycle is repeated exactly the same time after 19 years. Corresponds to the fact that 19 tropical years contain 6939.60 days, and 235 synodic months are 6939.69 days.Source: Royal Greenwich Observatory.