Asteroids with Satellites Database--Johnston's Archive

2004 KB19

compiled by Wm. Robert Johnston
last updated 23 September 2018

--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, plutino


orbital data, primary (osculating elements) [JPL] :
semimajor axis a: 39.782 AU
orbital period P: 250.917 yr
(= 91649.3 d)
eccentricity e: 0.22044
perihelion distance q: 31.013 AU
aphelion distance Q: 48.552 AU
inclination i: 17.11647°
argument of perihelion ω: 284.646°
ascending node Ω: 43.91737°
mean anomaly M: 304.36°
perihelion passage TP: 2057 Jan 02
Epoch: 2018 Mar 23
data arc: 2004-2015 (19 obs.)
Earth MOID: 30.044 AU
Jupiter Tisserand invariant TJ: 5.286
Neptune Tisserand invariant TN:2.9 [*D]


orbital data, secondary:
semimajor axis as: 3400 km (separation) [N18a]
orbital period Ps: 53 d [*E]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 7.4 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 146 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: 270000 km [*E]

other data, primary:
diameter dp: 105 km [*E]
rotation period RPp: ?
amplitude in mag., rotational ΔM: ?
pole direction Β, λ: ? , ?


other data, secondary:
diameter ds: 100 km [*E]
diameter ratio ds/dp: 0.95 ± 0.03 [*D]
component mag. difference ΔM: 0.11 ± 0.06 [N18a]
rotation period RPs: ?

-- 2004 KB19 --discovery and notes:

Primary discovered 2004 May 24 from Mauna Kea Observatory, Hawaii, USA by Canada-France Ecliptic Plane Survey.

Companion discovered 2012 Aug 20 by K. S. Noll, W. M. Grundy, S. D. Benecchi, H. Schlichting, and R. Murray-Clay using Hubble Space Telescope observations from Hubble Space Telescope. Announced 2015 Aug [N18a].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


© 2018 by Wm. Robert Johnston.
Last modified 23 September 2018.
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