Asteroids with Satellites Database--Johnston's Archive

(5482) Korankei

compiled by Wm. Robert Johnston
last updated 27 May 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: main belt asteroid


orbital data, primary (osculating elements) [JPL] :
semimajor axis a: 2.52427859201 AU
orbital period P: 4.0106441329 yr
(= 1464.88776955 d)
eccentricity e: 0.18766633937
perihelion distance q: 2.05055646909 AU
aphelion distance Q: 2.99800071493 AU
inclination i: 4.362406908°
argument of perihelion ω: 298.55558821°
ascending node Ω: 302.51684851°
mean anomaly M: 277.31863837°
perihelion passage TP: 2026 Oct 23.4414317
Epoch: 2025 Nov 21
data arc: 1984-2026 (4932 obs.)
Earth MOID: 1.04065 AU
Jupiter Tisserand invariant TJ: 3.426


orbital data, secondary:
semimajor axis as: 12 km [*E]
separation/primary radius as/rp:4.5 [*E]
separation/Hill radius as/rH:0.013 [*E]
orbital period Ps: 0.9212 ± 0.0004 d [B26c]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 13.42 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 5.69 ± 0.04 km [M19a]
geometric albedo: 0.364 ± 0.09 [M19a]
color index U-B: ?
color index B-V: ?
taxonomic type: Sa (SMASSII) [B02e]
mass m: ?
density ρ: (2 g/cm3) [*A]
Hill radius rH: 930 km [*E]

other data, primary:
diameter dp: 5.35 ± 0.04 km [*D]
dimensions :~5.8 x ~4.9 km [*E]
axial ratios a/b, b/c:1.2, ? [*E]
rotation period RPp: 3.38507 ± 0.00009 h [B26c]
amplitude in mag., rotational ΔM: 0.19 [B26c]
amplitude in mag., mutual events ΔM:0.13 [B26c]
pole direction Β, λ: ? , ?


other data, secondary:
diameter ds: >1.93 km [*D]
diameter ratio ds/dp: >0.36 [B26c]
component mag. difference ΔM: >2.22 [*D]
rotation period RPs: ?

-- (5482) Korankei --discovery and notes:

Primary discovered 1990 Feb 27 from Toyota, Japan by K. Suzuki and T. Urata. Alternate designation(s): 1990 DX, 1984 WO3, 1986 EY1, 1987 SB23. Linked to prediscovery observations from 1984 Nov 27. Permanent number assigned 1993 Mar 08.

Named 2012 Feb 07 for the town in Aichi, Japan [MPC078269].

Companion discovered 2026 Mar 07 by V. Benishek and P. Pravec using lightcurve observations from Sopot Observatory, Serbia. Announced 2026 May 26 [B26c].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


© 2026 by Wm. Robert Johnston.
Last modified 27 May 2026.
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