Irregular moons of Saturn -- Skathi

For notes, see https://tilmanndenk.de/outersaturnianmoons/skathi/#1

22 Oct 2018 / TD


	Overview Table
Moon name	Skathi
Saturn range	16e6	km
Orbit period	2.0	years
Orbit direction	retrograde
Size ~	8	km
Rotation period	11	6	hh:mm
Discovery year	2000

(A)	Designations and discovery circumstances
(A1)	Moon name	Skathi
(A2)	Moon abbrev. (TD)	Ska
(A3)	IAU number	Saturn XXVII
(A4)	Provisional designation	S/2000 S 8
(A5)	SPICE ID	627
(A6)	Also-used label	S27
(A7)	First observation date	23 Sep 2000
(A7)	Announcement date	07 Dec 2000
(A7)	IAU circular announcement no.	7538
(A8)	Discoverers	Kavelaars, Gladman, et al.

(B)	Orbit parameters
(B1)	Orbit direction	retrograde
(B2)	Group member	Norse
(B3)	Dynamical family	--
(B4)	Periapsis range	11.39e6	km
(B5)	Semi-major axis	15.64e6	km
(B6)	Apoapsis range	19.89e6	km
(B7)	Semi-major axis	259	R_Saturn
(B8)	Semi-major axis	0.105	au
(B9)	Semi-major axis	0.24	R_Hill
(B10)	Orbit eccentricity	0.27	
(B11)	Orbit inclination	152.6	°
(B12)	Inclination supplemental angle	27.4	°
(B13)	Orbital period	728	d
(B14)	Orbital period	1	11	4	y:m:w
(B15)	Mean orbit velocity	1.56	km/s

(C)	Physical parameters
(C1)	Mean size ~	8	-1.3	+2.2	km
(C2)	Mean radius ~	3.8	km
(C3)	Equatorial circumference ~	25	km
(C4)	Minimum equatorial axes ratio	1.27
(C5)	Axes radii (a x b x c) ~	unknown
(C5)	
(C6)	Mass ~	1e14	kg
(C7)	Mean density (?)	0.5	g/cm^3
(C8)	Surface escape velocity ~	5	km/h
(C9)	Rotation period	11.10	h
(C9)	Rotation period error	0.02	h
(C9)	Spin rate	2.16	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 ~	14.3	mag
(C15)	Apparent visual magnitude from Earth	23.6	mag
(C16)	Best apparent magnitude for Cassini	15.1	mag
(C17)	Spectral slope ~	+5.2	%/100nm
(C17)	B-R color index ~	1.09	
(C18)	Albedo (?)	0.06	
(C19)	Hill sphere radius ~	460	km
(C20)	Hill sphere radius ~	120	r_Ska