As the 7 day-week system is associated with the Babylons, it is not far fetched to assume that the lunar mansions were Babylonian in origin (or even earlier in the Mesopotamian region).
Hello Astrojin,
I missed this point earlier. Personally, I am a bit sceptical about this kind of reverse engineering theory.

There was some academic speculation in this direction during the 19th century suggesting the lunar mansions originated in Mesopotamia but it hasn't found any support since then. One of the basic problems is that all our records of ancient Mesopotamian references to stars and constellations such as the Mul.Apin involve either 17/18 asterisms 'in the path of the Moon'', 36 rising stars or in later sources the 12 zodiacal constellations. There doesn't appear to be anything relating to 28 divisions of the stars and constellations.
Having said all that David Pingree suggested (The Astral Science in Mesopotamia by Hermann Hunger and David Pingree (1999, Page 63)) that the Mesopotamian association of gods/goddesses with constellations in the late 2nd-millennium BCE probably influenced the Vedic Indians to also associate one or a set of their gods/goddesses to each of their lunar mansions (nakshatras). According to David Pingree it is also likely that the influence for the development of the Indian system of nakshatras originated in Mesopotamia, specifically with star list VI in the Mul.Apin series (17/18 stars/asterisms in the path of the moon).
The original use of the scheme of nakshatras was simply to record the location of the moon among the stars. The scheme of nakshatras was later extended to an astronomical system for recording the positions of planets (and the lunar nodes). Examples of this later use are to be found in the Mahabharata. (The Vedic convention of 27 or 28 lunar mansions has survived in modern Indian calendrical practice.
At a much later point in history lunar mansions do occur in Persia as well as Arabia. In particular during the Sassanian dynasty (224 to 651CE) there are texts recording lunar mansions. One example, is the Persian Pahlavi text known as the
Greater Bundahisn which draws upon older Zorasteran/Avestan material. Most of the chapters of the compendium date to the 8th and 9th centuries however, the earlier chapters seem to have a much older origin.
http://www.avesta.org/mp/grb.htm
Here is the relevant section from Chapter 2 of the Greater Bundahisn:
2. As, He first created the firmament; the stars of the constellations were fixed thereon, especially these twelve, whose names are: the Ram, the Cow, the Twins, the Crab, the Lion, the Husk of Corn, the Balance, the Scorpion, the Centaur, the Goat, the Pot, and the Fishes, which are subdivided into twenty-eight asterisms of reckoning, the names of which [are these]: Padevar, Pesh-parviz, Parviz, Paha, Aze-sar, Beshn, Rakhvat, Taraha, Azara, Nahn, Maian, Avdem, Mashaha, Spor, Husru, Sroi, Nur, Gelu, Grafsha, Varant, Gao, Goi, Muru, Bunda, Kaht-sar, Vaht, Mayan, Kaht; all the original material creations made their residence thereon, so that when the Adversary, would arrive, they might fight against their own enemy and the creatures might be saved from their antagonist; each of these constellations is a specimen of a soldier and veteran, who is posted for battle; six thousand four hundred eighty (thousand) small stars are created forth, for help, [those which the astronomers now number, besides those innumerable, as, they are for their mutual-help.]
So how did these Lunar mansions get to Persia/Arabia?
1 They could have travelled to Arabia first via sea routes. Even to this day places like Yemen and the Gulf still trade with India through traditional sailing craft.
2 They might have went to Persia first via the land route from India. There was clearly lots of astrological cross fertilization going on in both directions.
The idea that the Arabic mansions have a really ancient, indigenous background in Arabia doesn't seem supported from surviving anwa' records. Moreover, the general view is that the Persian mansions were also influenced from the nakshatras of India. According to Walter Henning the Indian system of lunar mansions was introduced into Iran (Persia) circa 500 CE. He suggests that when the system of the lunar mansions (nakshatras) was introduced into Iran (Persia) from India a completely new set of names was created for them.
It certainly would be interesting to study the sidereal roots of the lunar mansions of Arabia, India and Persia further.
My query is that, do we have any references that relate the phases of the moon and lunar mansion? If this exists, then perhaps we have to delineate the moon in a more comprehensive way by combining signs, mansions and phases. I am pretty sure that an astrologer-magician would choose a "growing" spell during waxing phase in a certain lunar mansion, hence the phase-mansion combination should be documented somewhere.
In his book
The Mansions of the Moon Christopher Warnock does discuss the importance of lunar phase in delineating the Moon in the mansions:
Christopher Warnock quotes the
Picatrix (bracketed text is by Warnock):
And if you find the Moon increasing in light (waxing) then her strength and power is good and useful in all works to bring about increase and if you find the light (of the Moon) diminishing (waning) she is suitable and harmonious for all works in which you wish diminution.
And after the Moon separates from the conjunction of the Sun (New Moon) all the way up to a sinister (against the direction of signs) square until it arrives at an opposition (Full Moon) it is always good and harmonious for buying and selling , trials and asking for repayment of debts, debates and councils for everything you require.
And after separating from the opposition of the Sun and crossing to the dexter square all the way to conjunction of the Sun it is good and appropriate to (pay)for debts that you owe and for those who keep possessions to return them to others and for wisdom and for asking and inquiring into truth.
Christopher Warnock takes all these quotes from Picatrx, Book Two, Chapter three. I would suggest that anyone serious in studying the lunar mansions will find Christopher Warnock's book indispensible. Especially, those interested in the tropical, equal mansions stemming from
Picatrix.
Mark