A_AXIS_RADIUS:               UNK
   B_AXIS_RADIUS:               UNK
   BOND_ALBEDO:                 UNK
   C_AXIS_RADIUS:               UNK
   FLATTENING:                  UNK
   MAGNETIC_MOMENT:             UNK
   MASS:                        2.14 10^22 KG [BENNER1997]
   MASS_DENSITY:                2.08 GRAMS/CM^3 [BENNER1997]
   MINIMUM_SURFACE_TEMPERATURE: UNK
   MAXIMUM_SURFACE_TEMPERATURE: UNK
   MEAN_SURFACE_TEMPERATURE:    UNK
   EQUATORIAL_RADIUS:           1355 +/-7 KM [TYLERETAL1989]
                                1350 KM [BENNER1997]
   MEAN_RADIUS:                 UNK
   SURFACE_GRAVITY:             0.78 METERS/SECOND/SECOND [BENNER1997]
   REVOLUTION_PERIOD:           5.88 DAYS [BENNER1997]
   POLE_RIGHT_ASCENSION:        299.36 DEGREES [BACHMAN1993]
   POLE_DECLINATION:            41.17 DEGREES [BACHMAN1993]
   SIDEREAL_ROTATION_PERIOD:    5.88 DAYS [BENNER1997]
   MEAN_SOLAR_DAY:              UNK
   OBLIQUITY:                   UNK
   ORBITAL_ECCENTRICITY:        1.6 10^-5 [BENNER1997]
   ORBITAL_INCLINATION:         157 DEGREES [BENNER1997]
   ORBITAL_SEMIMAJOR_AXIS:      3.558 10^5 KM [BENNER1997]
   ASCENDING_NODE_LONGITUDE:    UNK
   PERIAPSIS_ARGUMENT_ANGLE:    UNK