Asteroids with Satellites Database--Johnston's Archive

(4868) Knushevia

compiled by Wm. Robert Johnston
last updated 23 June 2015

--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, inner

orbital data, primary (osculating elements) [JPL] :
semimajor axis a: 1.960501539 AU
orbital period P: 2.745053299 yr
(= 1002.6496539 d)
eccentricity e: 0.068090629
perihelion distance q: 1.82677757 AU
aphelion distance Q: 2.094225512 AU
inclination i: 22.1026659°
argument of perihelion ω: 94.355385°
ascending node Ω: 187.534148°
mean anomaly M: 157.592422°
perihelion passage TP: 2013 Sep 26.08337
Epoch: 2014 Dec 09
data arc: 1983-2015 (741 obs.)
Earth MOID: 0.908334 AU
Jupiter Tisserand invariant TJ: 3.789

orbital data, secondary:
semimajor axis as: 2.1 km [*E]
separation/primary radius as/rp:2.8 [*E]
separation/Hill radius as/rH:0.0097 [*E]
orbital period Ps: 0.49675 ± 0.00012 d [W15i]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 14.8 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 1.535 ± 0.322 km [M11b]
geometric albedo: 1 [M11b]
color index U-B: ?
color index B-V: ?
taxonomic type: ?
mass m: ?
density ρ: (1.6 g/cm3) [*A]
Hill radius rH: 220 km [*E]

other data, primary:
diameter dp: 1.52 ± 0.32 km [*D]
rotation period RPp: 3.1422 ± 0.0001 h [W15i]
amplitude in mag., rotational ΔM: 0.05 ± 0.01 [W15i]
amplitude in mag., mutual events ΔM:0.02 [W15i]
pole direction Β, λ: ? , ?

other data, secondary:
diameter ds: >0.2 km [*D]
diameter ratio ds/dp: >0.13 ± 0.03 [W15i]
component mag. difference ΔM: 4.4 [*D]
rotation period RPs: 11.922 ± 0.003 h [W15i]

-- (4868) Knushevia --discovery and notes:

Primary discovered 1989 Oct 27 from Palomar Observatory, California, USA by E. F. Helin. Alternate designation(s): 1989 UN2, 1988 DE5. Linked to prediscovery observations from 1983 Jul 11. Permanent number assigned 1991 Jun 27.

Named 2002 Apr 27 for Kiev National Taras Shevchenko University, Kiev, Ukraine [MPC45336].

Companion discovered 2013 Apr 18 by B. D. Warner and R. D. Stephens using lightcurve observations from Center for Solar System Studies, Landers, California, United States. Announced 2015 Jun [W15i].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:

© 2015 by Wm. Robert Johnston.
Last modified 23 June 2015.
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