Asteroids with Satellites Database--Johnston's Archive

(5402) Kejosmith

compiled by Wm. Robert Johnston
last updated 30 December 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: main belt asteroid


orbital data, primary (osculating elements) [JPL] :
semimajor axis a: 2.0460939332 AU
orbital period P: 2.92676836 yr
(= 1069.0223334 d)
eccentricity e: 0.136784364
perihelion distance q: 1.76622028 AU
aphelion distance Q: 2.3259675895 AU
inclination i: 16.7062045°
argument of perihelion ω: 133.405672°
ascending node Ω: 237.047259°
mean anomaly M: 50.344866°
perihelion passage TP: 2018 Nov 28.500595
Epoch: 2019 Apr 27
data arc: 1986-2018 (1187 obs.)
Earth MOID: 0.8028 AU
Jupiter Tisserand invariant TJ: 3.733


orbital data, secondary:
semimajor axis as: 12 km [*E]
separation/primary radius as/rp:5.8 [*E]
separation/Hill radius as/rH:0.018 [*E]
orbital period Ps: 1.526 d [B18k]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 13.6 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 4.19 ± 0.23 km [M**]
geometric albedo: 0.4 ± 0.06 [M**]
color index U-B: ?
color index B-V: ?
taxonomic type: ?
mass m: ?
density ρ: (1.6 g/cm3) [*A]
Hill radius rH: 660 km [*E]

other data, primary:
diameter dp: 4.12 km [*D]
rotation period RPp: 2.69549 ± 0.00009 h [B18k]
amplitude in mag., rotational ΔM: 0.13 [B18k]
amplitude in mag., mutual events ΔM:0.05 ±0.02 [B18k]
pole direction Β, λ: ? , ?


other data, secondary:
diameter ds: ?
diameter ratio ds/dp: >0.18 [B18k]
component mag. difference ΔM: <3.7 [*D]
rotation period RPs: ?

-- (5402) Kejosmith --discovery and notes:

Primary discovered 1989 Oct 27 from Palomar Observatory, California, USA by E. F. Helin. Alternate designation(s): 1989 UK2, 1986 SX, 1986 WO5. Linked to prediscovery observations from 1986 Sep 30. Permanent number assigned 1992 Dec 09.

Named 1997 Apr 22 for Keith C. Smith and Joan Furlong [MPC029670].

Companion discovered 2018 Aug 04 by V. Benishek, P. Pravec, H. Kucakova, K. Hornoch, B. Warner, J. Oey, F. Pilcher, and V. Chiorny using lightcurve observations from Sopot Observatory, Serbia; Ondrejov Observatory, Czech Republic; CS3 Palmer Divide Station, Eaton, Colorado, USA; Blue Mountains Observatory, Leura, New South Wales, Australia; Organ Mesa Observatory, Las Cruces, New Mexico, USA; Kharkiv Observatory, Chuguev, Ukraine. Announced 2018 Oct 07 [B18k].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


© 2018 by Wm. Robert Johnston.
Last modified 30 December 2018.
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