Irregular moons of Saturn -- Kari For notes, see https://tilmanndenk.de/outersaturnianmoons/kari/#1 23 Oct 2018 / TD Overview Table Moon name Kari Saturn range 22e6 km Orbit period 3.4 years Orbit direction retrograde Size ~ 6 km Rotation period 7 42 hh:mm Discovery year 2006 (A) Designations and discovery circumstances (A1) Moon name Kari (A2) Moon abbrev. (TD) Kar (A3) IAU number Saturn XLV (A4) Provisional designation S/2006 S 2 (A5) SPICE ID 645 (A6) Also-used label S45 (A7) First observation date 04 Jan 2006 (A7) Announcement date 30 Jun 2006 (A7) IAU circular announcement no. 8727 (A8) Discoverers Sheppard S. et al. (B) Orbit parameters (B1) Orbit direction retrograde (B2) Group member Norse (B3) Dynamical family Kari (B4) Periapsis range 11.58e6 km (B5) Semi-major axis 22.09e6 km (B6) Apoapsis range 32.60e6 km (B7) Semi-major axis 366 R_Saturn (B8) Semi-major axis 0.148 au (B9) Semi-major axis 0.34 R_Hill (B10) Orbit eccentricity 0.48 (B11) Orbit inclination 156.1 ° (B12) Inclination supplemental angle 23.9 ° (B13) Orbital period 1231 d (B14) Orbital period 3 4 2 y:m:w (B15) Mean orbit velocity 1.31 km/s (C) Physical parameters (C1) Mean size ~ 6 -1 +1.75 km (C2) Mean radius ~ 3.0 km (C3) Equatorial circumference ~ 20 km (C4) Minimum equatorial axes ratio unknown (C5) Axes radii (a x b x c) ~ unknown (C5) (C6) Mass ~ 6e13 kg (C7) Mean density (?) 0.5 g/cm^3 (C8) Surface escape velocity ~ 4 km/h (C9) Rotation period 7.70 h (C9) Rotation period error 0.14 h (C9) Spin rate 3.12 d^(-1) (C10) Spin direction unknown (C11) Seasons unknown (C12) Pole direction (ecliptic longitude λ) unknown (C12) Pole direction (ecliptic latitude β) unknown (C13) Pole direction (geocentric RA) unknown (C13) Pole direction (geocentric Dec) unknown (C14) Absolute visual magnitude ~ 14.8 mag (C15) Apparent visual magnitude from Earth 23.9 mag (C16) Best apparent magnitude for Cassini 14.8 mag (C17) Spectral slope unknown (C17) B-R color index unknown (C18) Albedo (?) 0.06 (C19) Hill sphere radius ~ 370 km (C20) Hill sphere radius ~ 120 r_Kar