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Asteroids with Satellites Database--Johnston's Archive

(5402) Kejosmith

compiled by Wm. Robert Johnston
last updated30 April 2022

--Orbital and physical data--

(Seethis page for definitions of quantities; source codes in brackets, seethis 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 axisa:2.0462824583 AU
orbital periodP:2.9272281585 yr
(= 1069.1700849 d)
eccentricitye:0.136975954
perihelion distanceq:1.765990966 AU
aphelion distanceQ:2.3265739507 AU
inclinationi:16.70276514°
argument of perihelionω:133.2097502°
ascending nodeΩ:237.0283004°
mean anomalyM:318.6497615°
perihelion passageTP:2021 Oct 31.806772
Epoch:2021 Jul 01
data arc:1986-2021(2468 obs.)
Earth MOID:0.802777 AU
Jupiter Tisserand invariantTJ:3.733

orbital data, secondary:

semimajor axisas:12 km[*E]
separation/primary radiusas/rp:5.8 [*E]
separation/Hill radiusas/rH:0.018 [*E]
orbital periodPs:1.526d [B18k]
eccentricityes:?
normalized ang. mom.αL:?
other data, system (combined):
absolute mag.H:13.69[MPC]
slope parameterG:(0.15) [*A]
effective diameterdE:4.19± 0.23 km [M12b]
geometric albedo:0.400± 0.060[M12b]
color indexU-B:?
color indexB-V:?
taxonomic type:?
massm:?
densityρ:(1.6 g/cm3) [*A]
Hill radiusrH:660 km [*E]

other data, primary:

diameterdp:4.12 km [*D]
rotation periodRPp:2.69549± 0.00009h [B18k]
amplitude in mag., rotationalΔM:0.13 [B18k]
amplitude in mag., mutual eventsΔM:0.05 ±0.02 [B18k]
pole directionΒ, λ:?,?

other data, secondary:

diameterds:>0.74km [*D]
diameter ratiods/dp:>0.18 [B18k]
component mag. differenceΔM:<3.72 [*D]
rotation periodRPs:?

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

Primary discovered1989 Oct 27from Palomar Observatory, California, USAby 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 discovered2018 Aug 04 by V. Benishek, P. Pravec, H. Kucakova, K. Hornoch, B. Warner, J. Oey, F. Pilcher, and V. Chiornyusinglightcurve 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.Announced2018 Oct 07 [B18k].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


©2018-2021, 2022by Wm. Robert Johnston.
Last modified30 April 2022.
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