Asteroids with Satellites Database--Johnston's Archive

2014 LQ28

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, Cubewano


orbital data, primary (osculating elements) [JPL] :
semimajor axis a: 43.5274 AU
orbital period P: 278.18 yr
(= 104891.9 d)
eccentricity e: 0.093352
perihelion distance q: 39.464 AU
aphelion distance Q: 47.5907 AU
inclination i: 1.30096°
argument of perihelion ω: 157.704°
ascending node Ω: 223.3106°
mean anomaly M: 340.877°
perihelion passage TP: 2033 Jun 24
Epoch: 2018 Mar 23
data arc: 2010-2015 (122 obs.)
Earth MOID: 38.4658 AU
Jupiter Tisserand invariant TJ: 5.877
Neptune Tisserand invariant TN:3.086 [*D]


orbital data, secondary:
semimajor axis as: 24000 km (separation) [S18a]
orbital period Ps: 290 d [*E]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 5.7 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 320 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: 840000 km [*E]

other data, primary:
diameter dp: 250 km [*E]
rotation period RPp: ?
amplitude in mag., rotational ΔM: ?
pole direction Β, λ: ? , ?


other data, secondary:
diameter ds: 210 km [*E]
diameter ratio ds/dp: 0.83 [*D]
component mag. difference ΔM: 0.4 [S18a]
rotation period RPs: ?

-- 2014 LQ28 --discovery and notes:

Primary discovered 2014 Jun 03 from Haleakala, Hawaii, USA by PanSTARRS 1 program. Linked to prediscovery observations from 2010 Sep 15.

Companion discovered 2016 Sep 28 by S. S. Sheppard and A. Thirouin using adaptive optics telescope observations from Magellan Telescope. Announced 2018 Feb 04 [S18a].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


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