Asteroids with Satellites Database--Johnston's Archive

(20882) 2000 VH57

compiled by Wm. Robert Johnston
last updated 2 December 2018

--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: 2.3634077859 AU
orbital period P: yr
(= 1327.1084654 d)
eccentricity e: 0.247037778
perihelion distance q: 1.779556777 AU
aphelion distance Q: 2.9472587928 AU
inclination i: 2.3778579°
argument of perihelion ω: 358.181406°
ascending node Ω: 13.666518°
mean anomaly M: 58.7815281°
perihelion passage TP: 2018 Sep 22.307046
Epoch: 2019 Apr 27
data arc: 1949-2018 (1527 obs.)
Earth MOID: 0.778896 AU
Jupiter Tisserand invariant TJ: 3.507


orbital data, secondary:
semimajor axis as: 21 km [*E]
separation/primary radius as/rp:9.5 [*E]
separation/Hill radius as/rH:0.026 [*E]
orbital period Ps: 1.3671 ± 0.0008 d [W18e]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 14.4 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 4.4 km [*E]
geometric albedo: (0.16 ) [*A]
color index U-B: ?
color index B-V: ?
taxonomic type: ?
mass m: ?
density ρ: (1.6 g/cm3) [*A]
Hill radius rH: 810 km [*E]

other data, primary:
diameter dp: 4.4 km [*E]
rotation period RPp: 2.5586 ± 0.0001 h [W18e]
amplitude in mag., rotational ΔM: 0.15 [W18e]
pole direction Β, λ: ? , ?


other data, secondary:
diameter ds: ?
diameter ratio ds/dp: ?
component mag. difference ΔM: ?
rotation period RPs: ?

-- (20882) 2000 VH57 --discovery and notes:

Primary discovered 2000 Nov 03 from Socorro, New Mexico, USA by LINEAR Program. Alternate designation(s): 1978 TD4, 1978 WZ19, 1989 UD8, 1999 JU112. Linked to prediscovery observations from 1949 Nov 21. Permanent number assigned 2001 Jan 09.

Companion discovered 2018 Sep 15 by B. D. Warner, A. Aznar Macias, M. Serra-Ricart, J. Licandro, and P. Pravec using lightcurve observations from CS3, Landers, California, USA; Canary Astrophysics Institute. Announced 2018 Nov 08 [W18e].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


© 2018 by Wm. Robert Johnston.
Last modified 2 December 2018.
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