Asteroids with Satellites Database--Johnston's Archive

(4514) Vilen

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


orbital data, primary (osculating elements) [JPL] :
semimajor axis a: 2.344769957 AU
orbital period P: 3.590462221 yr
(= 1311.441095 d)
eccentricity e: 0.152686767
perihelion distance q: 1.98675461 AU
aphelion distance Q: 2.702785302 AU
inclination i: 7.9606864°
argument of perihelion ω: 88.423291°
ascending node Ω: 110.390806°
mean anomaly M: 332.233015°
perihelion passage TP: 2015 Mar 20.152124
Epoch: 2014 Dec 09
data arc: 1972-2015 (1075 obs.)
Earth MOID: 1.0051 AU
Jupiter Tisserand invariant TJ: 3.533


orbital data, secondary:
semimajor axis as: 11 km [*E]
separation/primary radius as/rp:3.6 [*E]
separation/Hill radius as/rH:0.012 [*E]
orbital period Ps: 0.7021 ± 0.0004 d [P15d]
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: 6.29 km [*E]
geometric albedo: (0.16 ) [*A]
color index U-B: ?
color index B-V: ?
taxonomic type: X/M (Tholen) [P15d]
mass m: ?
density ρ: (1.6 g/cm3) [*A]
Hill radius rH: 950 km [*E]

other data, primary:
diameter dp: 6.09 km [*E]
rotation period RPp: 2.89224 ± 0.00009 h [P15d]
amplitude in mag., rotational ΔM: 0.09 [P15d]
pole direction Β, λ: ? , ?


other data, secondary:
diameter ds: >1.58 km [*E]
diameter ratio ds/dp: >0.26 [P15d]
component mag. difference ΔM: 2.9 [*D]
rotation period RPs: ?

-- (4514) Vilen --discovery and notes:

Primary discovered 1972 Apr 19 from Nauchnyj, Crimea, Ukraine, USSR by T. M. Smirnova. Alternate designation(s): 1972 HX, 1972 KA, 1982 BR8, 1986 CE, 1986 ER1. Permanent number assigned 1990 Jul 08.

Named 1997 Aug 18 for Vilen V. Nesterov (1935-) [MPC30475].

Companion discovered 2015 Apr 16 by D. Pray, P. Pravec, K. Hornoch, P. Kusnirak, J. Vrastil, H. Kucakova, V. Chiorny, V. Shechenko, V. Reddy, W. Cooney, J. Gross, and D. Terrell using lightcurve observations from Sugarloaf Mountain Observatory, South Deerfield, MA; Ondrejov Observatory; Kharkiv Observatory; Planetary Science Institute, Tucson, AZ; Sonoita Research Institute, Sonoita, AZ; Southwest Research Institute, USA. Announced 2015 May 22 [P15d].

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--Links to ADS abstracts:


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