The Hipparcos filter, referred to as Hp, extends from 3550 Å
to 8900 Å with the maximum at 4350 Å. The typical
accuracy of Hipparcos measurements, at the 8th magnitude, is given as
0.0015 mag (ESA, 1997).
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.