Asteroids with Satellites Database--Johnston's Archive

(5426) Sharp

compiled by Wm. Robert Johnston
last updated 9 October 2021

--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: 1.9550247279 AU
orbital period P: 2.733610189 yr
(= 998.4511217 d)
eccentricity e: 0.11656562
perihelion distance q: 1.727136059 AU
aphelion distance Q: 2.1829133971 AU
inclination i: 23.79822738°
argument of perihelion ω: 67.3917973°
ascending node Ω: 88.1698003°
mean anomaly M: 103.0700876°
perihelion passage TP: 2020 Sep 18.137654
Epoch: 2021 Jul 01
data arc: 1985-2021 (1958 obs.)
Earth MOID: 0.824181 AU
Jupiter Tisserand invariant TJ: 3.776

orbital data, secondary:
semimajor axis as: 4.4 km [*E]
separation/primary radius as/rp:4.5 [*E]
separation/Hill radius as/rH:0.017 [*E]
orbital period Ps: 1.0092 ± 0.0008 d [W15j]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 14.06 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 2.03 ± 0.34 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: 270 km [*E]

other data, primary:
diameter dp: 1.97 ± 0.33 km [*E]
rotation period RPp: 4.5609 ± 0.0001 h [W15j]
amplitude in mag., rotational ΔM: 0.18 ± 0.01 [W15j]
amplitude in mag., mutual events ΔM:0.08 ±0.01 [W15j]
pole direction Β, λ: ? , ?

other data, secondary:
diameter ds: >0.49 km [*E]
diameter ratio ds/dp: >0.25 [*E]
component mag. difference ΔM: <3.01 [*E]
rotation period RPs: 24.22 ± 0.02 h [W15j]

-- (5426) Sharp --discovery and notes:

Primary discovered 1985 Feb 16 from Palomar Observatory, California, USA by C. S. Shoemaker. Alternate designation(s): 1985 DD . Permanent number assigned 1993 Feb 06.

Named 1995 Mar 17 for Robert P. Sharp (1911-2004) [MPC024917].

Companion discovered 2014 Dec 29 by B. D. Warner, V. Benishek, and A. Ferrero using lightcurve observations from Palmer Divide Station, Eaton, Colorado, USA; Belgrade Astronomical Observatory, Belgrade, Serbia; Bigmuskie Observatory, Mombercelli, Astri, Italy. Announced 2015 Jun [W15j].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:

© 2015, 2021 by Wm. Robert Johnston.
Last modified 9 October 2021.
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