Fixed stars don’t move (except for proper motion, which is extremely
slight). What is moving is the Vernal Equinox, which is the
point from which their positions are measured. The VE moves backward
against the background of the stars at a rate of 50.23 secs per
year (about 5 minutes of a degree every six years or 1 full degree every 72
years). So the position has to be recalculated according to
the year of the chart you are using.
From the introduction to my book:
It may help those studying this work to know my research process. All stars
and DSO’s (deep space objects – i.e. galaxies, black holes, clusters etc) in
this work have been converted from Right Ascension and Declination,
projected perpendicularly onto the ecliptic and expressed in Celestial
Longitude, that is, in degrees along the ecliptic measured from 0 Aries. For
each chart I calculated the number of years between the birth or event and
Jan 1, 2000 (the primary fiducial of this book), multiplied that number by
50.23” (the rate of precession per year), added the resulting
degrees-and-minutes to each chart’s planets and angles, then entered the new
positions, each in its appropriate starset.
Precession corrections, especially for ancient charts, may cause a chart’s
tropical position(s) to change signs; Michaelangelo, for instance, was born
with the Sun at 24Pisc01 in 1475, but because of precession, the stars that
his Sun aligned with, which were then in tropical Pisces, are now at the
beginning of tropical Aries (the closest is 26 Piscium in the tail of the
West Fish, which in 2000 was at 1 Aries 43; his Sun, precession-corrected to
2000.0, is 1 Aries 20). Thus, because of precession, a person born under one
tropical sign might now appear to be placed in another; even for some born
in the 20th century with a planet in a late degree, precession correction
may take the planet into the next sign. The important thing to remember, in
this regard, is that the original signs and rulerships hold sway; precession
corrections simply serve to indicate which stars the original placements
were aligned with.
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As it happens, royal star Regulus, very bright and on the ecliptic, is now
finishing it’s 2.150-year trip thru the 30-degrees of tropical Leo and is
about to enter tropical Virgo – but remember, the star is not moving! It’s
the Vernal Equinox that is moving!