Asteroids with Satellites Database--Johnston's Archive

(4350) Shibecha

compiled by Wm. Robert Johnston
last updated 19 June 2025

--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: 2.6289356454 AU
orbital period P: 4.2626348841 yr
(= 1556.92739143 d)
eccentricity e: 0.1895117352
perihelion distance q: 2.1307214895 AU
aphelion distance Q: 3.12714980129 AU
inclination i: 13.6890571°
argument of perihelion ω: 109.54917303°
ascending node Ω: 32.325383085°
mean anomaly M: 41.1755209°
perihelion passage TP: 2024 Nov 07.9241768
Epoch: 2025 May 05
data arc: 1972-2025 (8504 obs.)
Earth MOID: 1.18529 AU
Jupiter Tisserand invariant TJ: 3.335


orbital data, secondary:
semimajor axis as: 25 km [*E]
separation/primary radius as/rp:4.6 [*E]
separation/Hill radius as/rH:0.014 [*E]
orbital period Ps: 1.0413 ± 0.0002 d [G25a]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 12.46 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 11.49 ± 0.21 km [M19a]
geometric albedo: 0.176 ± 0.035 [M19a]
color index U-B: ?
color index B-V: ?
taxonomic type: ?
mass m: ?
density ρ: (1.6 g/cm3) [*A]
Hill radius rH: 1800 km [*E]

other data, primary:
diameter dp: 10.91 ± 0.20 km [*D]
dimensions :~11.9 x ~10.0 km [*E]
axial ratios a/b, b/c:1.2, ? [*E]
rotation period RPp: 2.8904 ± 0.00007 h [G25a]
amplitude in mag., rotational ΔM: 0.18 [G25a]
amplitude in mag., mutual events ΔM:0.165 ±0.055 [G25a]
pole direction Β, λ: ? , ?


other data, secondary:
diameter ds: >3.6 km [*D]
diameter ratio ds/dp: >0.33 [G25a]
component mag. difference ΔM: <2.4 [*D]
rotation period RPs: ?

-- (4350) Shibecha --discovery and notes:

Primary discovered 1989 Oct 26 from Kushiro, Hokkaido, Japan by S. Ueda and H. Kaneda. Alternate designation(s): 1989 UG1, 1951 YC1, 1972 TS4, 1972 VO, 1978 EX6, 1980 TR1, 1987 KJ. Linked to prediscovery observations from 1951 Dec. Permanent number assigned 1990 Jan 11.

Named 1991 Nov 21 [MPC019337].

Companion discovered 2025 Apr 01 by J.-F. Gout and M. Conjat using lightcurve observations from Tree Gate Farm Observatory, Starkville, Mississippi, USA; Nice Observatory, Nice, France. Announced 2025 Jun 02 [G25a].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


© 2025 by Wm. Robert Johnston.
Last modified 19 June 2025.
Return to Home. Return to Astronomy and Space. Return to Asteroids with Satellites.