The technique is a simplification of the method that can be found in the literature of the magical order Ordo Aurum Solis.
Build the astrosome (the astral body)
Ordo Aurum Solis uses a technique called Clavis Rei Primae to build the astrosome for the purposes of magic and/or astral projection. It's simplified version uses merely visualization of a stream of etheric energy passing through the five major "centers of activity", located as follows:Cornua Lunae - the genitals, half inside, half outside
Institia Splendens - the feet, half above the ground, half below.
The etheric energy is then visualized being dragged from the feet center to the top of the head and splitting into two separate streams that encircle the body on the left and the right and enter it back at the feet. The circulation is repeated five times.The actual projection consists of visualizing a cord extending from one's solar plexus, and the etheric energy leaving through the cord to form the copy of one's physical body. The consciousness is then focused either in the base of the throat, or in the brow, and projected forth into the etheric twin one has created.
My actual experience: after performing the "five centers" exercise for some time I woke up early in the morning, formed the "twin", and focused all my attention at the base of the throat and projected it towards the "twin". To my suprise, I succeeded in projecting my awareness, and was soon in my subtle body, looking at the room I was sleeping in. The astrosome was still weak, so I could see only as if through a blur, but could discern, for instance, the colors of the candles I bought for the purpose of practicing ceremonial magic. The projection ended quickly, but then I realized I got my hand on a fine and perfectly working technique.