Asteroids with Satellites Database--Johnston's Archive

2004 KH19

compiled by Wm. Robert Johnston
last updated 20 September 2014

--Orbital and physical data--

(See this page for definitions of quantities; source codes in brackets, see this link for full references; *A, *D, and *E indicate assumed, derived, and estimated values, respectively.)

dynamical type, primary: TNO

orbital data, primary (osculating elements) [JPL] :
semimajor axis a: 40.761 AU
orbital period P: 260.242 yr
(= 95053.2 d)
eccentricity e: 0.11906
perihelion distance q: 35.908 AU
aphelion distance Q: 45.614 AU
inclination i: 35.2592°
argument of perihelion ω: 226.10°
ascending node Ω: 232.96092°
mean anomaly M: 133.55°
perihelion passage TP: 1917 Nov 05
Epoch: 2014 May 23
data arc: 2004-2009 (20 obs.)
Earth MOID: 35.0112 AU
Jupiter Tisserand invariant TJ: 4.666
Neptune Tisserand invariant TN:2.63 [*D]

orbital data, secondary:
semimajor axis as: 13000 km (separation) [S12b]
separation/primary radius as/rp:150 [*E]
separation/Hill radius as/rH:0.027 [*E]
orbital period Ps: 210 d [*E]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 6.5 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 221 km [*E]
geometric albedo: (0.09 ) [*A]
color index U-B: ?
color index B-V: ?
taxonomic type: ?
mass m: ?
density ρ: (1 g/cm3) [*A]
Hill radius rH: 480000 km [*E]

other data, primary:
diameter dp: 179 km [*E]
rotation period RPp: ?
amplitude in mag., rotational ΔM: ?
pole direction Β, λ: ? , ?

other data, secondary:
diameter ds: 129 km [*E]
diameter ratio ds/dp: 0.721 [S12b]
component mag. difference ΔM: 0.72 [S12b]
rotation period RPs: ?

-- 2004 KH19 --discovery and notes:

Primary discovered 2004 May 24 from Mauna Kea Observatory, Hawaii, USA by B. Gladman.

Companion discovered - using imaging observations. Announced 2011 Dec 12.

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:

© 2011-2013, 2014 by Wm. Robert Johnston.
Last modified 20 September 2014.
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