Asteroids with Satellites Database--Johnston's Archive

(556068) 2014 JR80

compiled by Wm. Robert Johnston
last updated 18 September 2026

--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: 39.22858 AU
orbital period P: 245.7039 yr
(= 89743.3 d)
eccentricity e: 0.0941669
perihelion distance q: 35.53454 AU
aphelion distance Q: 42.92261 AU
inclination i: 15.419588°
argument of perihelion ω: 300.8264°
ascending node Ω: 119.179875°
mean anomaly M: 257.1771°
perihelion passage TP: 2096 Aug 12.4
Epoch: 2026 Jun 09
data arc: 2010-2025 (314 obs.)
Earth MOID: 34.5733 AU
Jupiter Tisserand invariant TJ: 5.403
Neptune Tisserand invariant TN:2.959 [*D]


orbital data, secondary:
semimajor axis as: 24300 km (separation) [P26i]
separation/primary radius as/rp:130 [*E]
separation/Hill radius as/rH:0.023 [*E]
orbital period Ps: 150 d [*E]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 4.93 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 505 km [*E]
geometric albedo: (0.074 ) [*A]
color index U-B: ?
color index B-V: ?
taxonomic type: ?
mass m: ?
density ρ: (1 g/cm3) [*A]
Hill radius rH: 1100000 km [*E]

other data, primary:
diameter dp: 367 km [*E]
rotation period RPp: ?
amplitude in mag., rotational ΔM: ?
pole direction Β, λ: ? , ?


other data, secondary:
diameter ds: 346 km [*E]
diameter ratio ds/dp: 0.942 ± 0.004 [*D]
component mag. difference ΔM: 0.13 ± 0.01 [P26i]
rotation period RPs: ?

-- (556068) 2014 JR80 --discovery and notes:

Primary discovered 2014 May 06 from Haleakala, Hawaii, USA by PanSTARRS 1 program. Linked to prediscovery observations from 2010 Jun 21. Permanent number assigned 2021 Jun 01.

Companion discovered 2026 Jun 13 by B. Proudfoot, W. Grundy, D. Ragozzine, B. Holler, F. L. Rommel, E. Fernandez-Valenzuela, and J. M. Gomez-Limon using Hubble Space Telescope observations from Hubble Space Telescope. Announced 2026 Sep 14 [P26i].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


© 2026 by Wm. Robert Johnston.
Last modified 18 September 2026.
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