Irregular moons of Saturn -- Hati

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

23 Oct 2018 / TD


	Overview Table
Moon name	Hati
Saturn range	20e6	km
Orbit period	2.8	years
Orbit direction	retrograde
Size ~	5	km
Rotation period	05	27	hh:mm
Discovery year	2004

(A)	Designations and discovery circumstances
(A1)	Moon name	Hati
(A2)	Moon abbrev. (TD)	Hat
(A3)	IAU number	Saturn XLIII
(A4)	Provisional designation	S/2004 S 14
(A5)	SPICE ID	643
(A6)	Also-used label	S43
(A7)	First observation date	12 Dec 2004
(A7)	Announcement date	04 May 2005
(A7)	IAU circular announcement no.	8523
(A8)	Discoverers	Jewitt, et al.

(B)	Orbit parameters
(B1)	Orbit direction	retrograde
(B2)	Group member	Norse
(B3)	Dynamical family	Mundilfari
(B4)	Periapsis range	12.50e6	km
(B5)	Semi-major axis	19.87e6	km
(B6)	Apoapsis range	27.24e6	km
(B7)	Semi-major axis	329	R_Saturn
(B8)	Semi-major axis	0.133	au
(B9)	Semi-major axis	0.30	R_Hill
(B10)	Orbit eccentricity	0.37	
(B11)	Orbit inclination	165.8	°
(B12)	Inclination supplemental angle	14.2	°
(B13)	Orbital period	1040	d
(B14)	Orbital period	2	10	0.75	y:m:w
(B15)	Mean orbit velocity	1.38	km/s

(C)	Physical parameters
(C1)	Mean size ~	5	-0.75	+1.5	km
(C2)	Mean radius ~	2.4	km
(C3)	Equatorial circumference ~	15	km
(C4)	Minimum equatorial axes ratio	1.42
(C5)	Axes radii (a x b x c) ~	unknown
(C5)	
(C6)	Mass ~	3e13	kg
(C7)	Mean density (?)	0.5	g/cm^3
(C8)	Surface escape velocity ~	3	km/h
(C9)	Rotation period	5.45	h
(C9)	Rotation period error	0.04	h
(C9)	Spin rate	4.40	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 ~	15.3	mag
(C15)	Apparent visual magnitude from Earth	24.4	mag
(C16)	Best apparent magnitude for Cassini	15.3	mag
(C17)	Spectral slope	unknown
(C17)	B-R color index	unknown
(C18)	Albedo (?)	0.06	
(C19)	Hill sphere radius ~	320	km
(C20)	Hill sphere radius ~	130	r_Hat