Just found this link on the moon
http://www.astro.uu.nl/~strous/AA/en/antwoorden/maan.html#v283
this was under a question How many times does the Moon orbit around the Earth each year? in the Question and Answers section
I gets a bit Complicated AND IM NOT sure which Value I should consider
27 days 7 hours OR even upto 29 days are mentioned between whats described as Sidereal and Synodical months.. ANYone any Ideas ????
the sidereal month: the period after which the Moon has returned to the same position (longitude) between the stars. On average, the sidereal month is now 27 days, 7 hours, and 43 minutes long. There are on average about 13.37 sidereal months in a tropical year.
the synodical month: the period after which the Moon attains the same phase again. The synodical month is now 29 days, 12 hours, 44 minutes, and 3 seconds on average. The are on average about 12.37 synodical months in a tropical year.
The Month
It takes the Moon one month to orbit around the Earth. There are no mile markers in space, so you can only tell if the Moon has completed another orbit if you compare its position with something else. You can pick different things to compare its position with, so you can define different kinds of months.
the calendar month: a period of between 28 and 31 days that divides calendars. In some calendars, such as the Gregorian calendar that is used in the West, the months are no longer directly tied to the phases of the Moon. In other calendars, such as the Jewish and Islamic calendars, each month starts with a specific phase of the Moon. In some calendars (such as the Gregorian calendar and the Islamic calendar) each year has 12 calendar months, in other calendars (such as the Jewish calendar) some years have 12 months and some have 13 months, and in yet other calendars there are still other numbers of months in a year.
the sidereal month: the period after which the Moon has returned to the same position (longitude) between the stars. On average, the sidereal month is now 27 days, 7 hours, and 43 minutes long. There are on average about 13.37 sidereal months in a tropical year.
the synodical month: the period after which the Moon attains the same phase again. The synodical month is now 29 days, 12 hours, 44 minutes, and 3 seconds on average. The are on average about 12.37 synodical months in a tropical year.
the tropical month: the period after which the Moon returns to the same position relative to the vernal equinox. On average, the tropical month is now 27 days, 7 hours, 43 minutes, and 12 seconds long. There are about 12.37 tropical months in a tropical year.
the anomalistic month: the period after which the Moon returns to the same position relative to its perigee. This month is currently 27 days, 13 hours, and 19 minutes long on average. There are about 13.26 anomalistic months in a tropical year.
the draconitic month: the period after which the Moon returns to the same node of its orbit. On average, this month is now 27 days, 5 hours, 5 minutes, and 6 seconds long. There are about 13.42 draconitic months in a tropical year.
Except for the calendar month, none of these months fits into a calendar year a whole number of times, so there is always a bit left over.