Asteroids with Satellites Database--Johnston's Archive

(5402) Kejosmith

compiled by Wm. Robert Johnston
last updated 30 April 2022

--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: 2.0462824583 AU
orbital period P: 2.9272281585 yr
(= 1069.1700849 d)
eccentricity e: 0.136975954
perihelion distance q: 1.765990966 AU
aphelion distance Q: 2.3265739507 AU
inclination i: 16.70276514°
argument of perihelion ω: 133.2097502°
ascending node Ω: 237.0283004°
mean anomaly M: 318.6497615°
perihelion passage TP: 2021 Oct 31.806772
Epoch: 2021 Jul 01
data arc: 1986-2021 (2468 obs.)
Earth MOID: 0.802777 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: 13.69 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 4.19 ± 0.23 km [M12b]
geometric albedo: 0.400 ± 0.060 [M12b]
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: >0.74 km [*D]
diameter ratio ds/dp: >0.18 [B18k]
component mag. difference ΔM: <3.72 [*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:

© 2018-2021, 2022 by Wm. Robert Johnston.
Last modified 30 April 2022.
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