Irregular moons of Saturn -- Jarnsaxa

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

23 Oct 2018 / TD


	Overview Table
Moon name	Jarnsaxa
Saturn range	19e6	km
Orbit period	2.8	years
Orbit direction	retrograde
Size ~	4	km
Rotation period	unknown
Discovery year	2006

(A)	Designations and discovery circumstances
(A1)	Moon name	Jarnsaxa
(A2)	Moon abbrev. (TD)	Jar
(A3)	IAU number	Saturn L
(A4)	Provisional designation	S/2006 S 6
(A5)	SPICE ID	650
(A6)	Also-used label	S50
(A7)	First observation date	05 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	Mundilfari
(B4)	Periapsis range	15.13e6	km
(B5)	Semi-major axis	19.35e6	km
(B6)	Apoapsis range	23.57e6	km
(B7)	Semi-major axis	321	R_Saturn
(B8)	Semi-major axis	0.129	au
(B9)	Semi-major axis	0.30	R_Hill
(B10)	Orbit eccentricity	0.22	
(B11)	Orbit inclination	163.7	°
(B12)	Inclination supplemental angle	16.3	°
(B13)	Orbital period	1007	d
(B14)	Orbital period	2	9	0.25	y:m:w
(B15)	Mean orbit velocity	1.40	km/s

(C)	Physical parameters
(C1)	Mean size ~	4	-0.75	+1.25	km
(C2)	Mean radius ~	2.1	km
(C3)	Equatorial circumference ~	14	km
(C4)	Minimum equatorial axes ratio	unknown
(C5)	Axes radii (a x b x c) ~	unknown
(C5)	
(C6)	Mass ~	2e13	kg
(C7)	Mean density (?)	0.5	g/cm^3
(C8)	Surface escape velocity ~	3	km/h
(C9)	Rotation period	unknown
(C9)	Rotation period error	--
(C9)	Spin rate	unknown
(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
(C13)	Pole direction (geocentric Dec)	unknown
(C14)	Absolute visual magnitude ~	15.6	mag
(C15)	Apparent visual magnitude from Earth	24.7	mag
(C16)	Best apparent magnitude for Cassini	16.2	mag
(C17)	Spectral slope	unknown
(C17)	B-R color index	unknown
(C18)	Albedo (?)	0.06	
(C19)	Hill sphere radius ~	340	km
(C20)	Hill sphere radius ~	160	r_Jar