THE URANIAN IRREGULARS HOME PAGE
Information on the irregular satellite system of Uranus
Until 1997, Uranus was alone among the outer planets in not having any know
irregular satelltes. Irregular satellites are those whose orbits are
either very non-circular or very inclined with respect to the equatorial
plane of the planet; they also tend to be (although is not required) very
distant from the planet.
Since 1997, our team has discovered all known irregular satellites of this
planet, and we hope that these web pages will serve to assist those looking
for further information.
Announcement of a sixth irregular uranian satellite. (Oct. 1/2002)
Discovery in 1999 of three additional satellites.
Recovery! of all five satellites in summer 2000.
English story (Sept. 20/99).
Texte en francais (French story)
(21 sept. 99).
Discovery in 1997 of the first 2 irregular uranian satellites.
Links from 1997
List of team members
All known astrometry of 1999 U1, U2, and U3 (MPC format,
last update 15 Jan/2001)
Data on orbital parameters (Courtesy ProjectPluto)
Data on orbital parameters (Courtesy JPL, note: mean, not osculating) (
Data on physical parameters
Orbit extrapolation (.ps)
Page maintained by:
Observatoire de la Cote d'Azur
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27 septembre 1999