Asteroids with Satellites Database--Johnston's Archive

(5135) Nibutani

compiled by Wm. Robert Johnston
last updated 6 December 2020

--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: 2.2390454431 AU
orbital period P: 3.3503822719 yr
(= 1223.7502369 d)
eccentricity e: 0.128332499
perihelion distance q: 1.951703146 AU
aphelion distance Q: 2.52638774 AU
inclination i: 3.3051849°
argument of perihelion ω: 229.892085°
ascending node Ω: 35.458319°
mean anomaly M: 47.947127°
perihelion passage TP: 2019 Dec 20.013033
Epoch: 2020 May 31
data arc: 1969-2020 (2833 obs.)
Earth MOID: 0.937965 AU
Jupiter Tisserand invariant TJ: 3.623


orbital data, secondary:
semimajor axis as: 9.6 km [*E]
separation/primary radius as/rp:4.14 [*E]
separation/Hill radius as/rH:0.014 [*E]
orbital period Ps: 0.9057 ± 0.0002 d [C20**]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 13.5 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 4.82 ± 0.15 km [M**]
geometric albedo: 0.527 ± 0.155 [M**]
color index U-B: ?
color index B-V: ?
taxonomic type: ?
mass m: ?
density ρ: (1.6 g/cm3) [*A]
Hill radius rH: 710 km [*E]

other data, primary:
diameter dp: 4.64 ± 0.15 km [*D]
rotation period RPp: 2.818 ± 0.00006 h [C20**]
amplitude in mag., rotational ΔM: 0.19 [C20**]
amplitude in mag., mutual events ΔM:0.12 ±0.04 [C20**]
pole direction Β, λ: ? , ?


other data, secondary:
diameter ds: 1.3 ± 0.1 km [*D]
diameter ratio ds/dp: 0.28 ± 0.02 [C20**]
component mag. difference ΔM: 2.76 ± 0.16 [*D]
rotation period RPs: ?

-- (5135) Nibutani --discovery and notes:

Primary discovered 1990 Oct 16 from Kushiro, Japan by S. Ueda and H. Kaneda. Alternate designation(s): 1990 UE, 1969 JG, 1982 DE, 1989 GV7. Linked to prediscovery observations from 1969 May 05. Permanent number assigned 1992 Mar 18.

Named 1996 Dec 24 for a valley in Hokkaido, Japan [MPC028621].

Companion discovered 2020 Sep using lightcurve observations. Announced 2020 Oct 29.

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


© 2020 by Wm. Robert Johnston.
Last modified 6 December 2020
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