Irregular moons of Saturn -- Mundilfari

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

22 Oct 2018 / TD


	Overview Table
Moon name	Mundilfari
Saturn range	19e6	km
Orbit period	2.6	years
Orbit direction	retrograde
Size ~	7	km
Rotation period	6	44	hh:mm
Discovery year	2000

(A)	Designations and discovery circumstances
(A1)	Moon name	Mundilfari
(A2)	Moon abbrev. (TD)	Mun
(A3)	IAU number	Saturn XXV
(A4)	Provisional designation	S/2000 S 9
(A5)	SPICE ID	625
(A6)	Also-used label	S25
(A7)	First observation date	23 Sep 2000
(A7)	Announcement date	07 Dec 2000
(A7)	IAU circular announcement no.	7538
(A8)	Discoverers	Gladman, Kavelaars, et al.

(B)	Orbit parameters
(B1)	Orbit direction	retrograde
(B2)	Group member	Norse
(B3)	Dynamical family	Mundilfari
(B4)	Periapsis range	14.73e6	km
(B5)	Semi-major axis	18.65e6	km
(B6)	Apoapsis range	22.57e6	km
(B7)	Semi-major axis	309	R_Saturn
(B8)	Semi-major axis	0.125	au
(B9)	Semi-major axis	0.28	R_Hill
(B10)	Orbit eccentricity	0.21	
(B11)	Orbit inclination	167.5	°
(B12)	Inclination supplemental angle	12.6	°
(B13)	Orbital period	953	d
(B14)	Orbital period	2	7	1.25	y:m:w
(B15)	Mean orbit velocity	1.43	km/s

(C)	Physical parameters
(C1)	Mean size ~	7	-1.2	+2	km
(C2)	Mean radius ~	3.5	km
(C3)	Equatorial circumference ~	22	km
(C4)	Minimum equatorial axes ratio	1.43
(C5)	Axes radii (a x b x c) ~	unknown
(C5)	
(C6)	Mass ~	9e13	kg
(C7)	Mean density (?)	0.5	g/cm^3
(C8)	Surface escape velocity ~	5	km/h
(C9)	Rotation period	6.74	h
(C9)	Rotation period error	0.08	h
(C9)	Spin rate	3.56	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 ~	14.5	mag
(C15)	Apparent visual magnitude from Earth	23.8	mag
(C16)	Best apparent magnitude for Cassini	15.3	mag
(C17)	Spectral slope ~	-5.0	%/100nm
(C17)	B-R color index ~	0.99	
(C18)	Albedo (?)	0.06	
(C19)	Hill sphere radius ~	550	km
(C20)	Hill sphere radius ~	155	r_Mun