  The F0 V star 9 Aur A exhibits an irregular variability of amplitude $\approx
$0.1 magnitude at optical wavelengths. The variations are too slow for it to be
a $\delta$ Scuti-type star. There is no evidence for a close, interacting
companion or ring of dust, either from infrared, ultraviolet, or speckle data.
The photometric variability of 9 Aur A is similar to two other early F dwarf
stars: $\gamma$ Doradus and HD 96008. 9 Aur B appears to be an M dwarf, 9 Aur C
is an early- to mid-K dwarf star, and 9 Aur E, if it is a member of the system,
probably is a normal white dwarf. 9 Aur D is most likely an unrelated and
distant K giant. [See note added in press regarding a fourth member of this
class of ``variables without a cause", and short term variations of the radial
velocity of 9 Aur.]
