Sideral astrology is an astrological branch, which uses fixed stars for interpretation of e.g. natal, horary or mundane charts.
The fixed star Regulus can serve as an example. I have supplied an ephemerid of Regulus,
which I have extracted from this site. As you can see fixed stars are actually not fixed - at least not fixed in the zodiac, where Regulus moves approximately 1 degree
and 23' every 100 years. (Actually it is the spring equinox or 0 degrees Aries that moves.)
There are also great websites with ephemerids for fixed stars here and
So, if a person has the Sun or any other planet in conjunction with Regulus and within 1-2 degrees orbis, that person is attributed with certain characteristics from
Regulus - here is an example, which I have copied from this site:
"Fixed star Regulus is of the nature of Mars and Jupiter. It gives violence, destructiveness, military honor of short
duration, with ultimate failure, imprisonment, violent death, success, high and lofty ideals and strength of spirit, and makes its natives magnanimous, grandly liberal, generous, ambitious, fond of power, desirous of command, high-spirited and independent.
It may convey royal properties, noble mind, frankness, courage. The importance of this star is accentuated by its nearness to the ecliptic. Its effect is in the best sense that of Jupiter and Mars. When Mars or Saturn are in conjunction with Regulus, especially
exciting events are always recorded e.g. assassinations, coup d’états, revolutions, revolts, demonstrations, overthrow of heads of state and similar events."
You can find more interpretations of fixed stars here.
Since the number of fixed stars is literally astronomical, it can be helpful to know that in the sidereal tradition 15 fixed stars are said to be more important than any other fixed stars - the so-called Behenian fixed
stars, which Wikipedia has an article about here.
The general problem with sidereal astrology is that it is dificult to research, because it requires larger data collections
than mainstream astrology. But with the research into male murderers charts I have actually got such a large collection. So far I have limited the research to the Sun and its conjunctions or oppositions with fixed stars, allowing a 1 degree orbis for the conjunctions
and a 0.5 degree orbis for the oppositions.