Asteroids with Satellites Database--Johnston's Archive

(20882) Paulsanchez

compiled by Wm. Robert Johnston
last updated 20 October 2019

--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: 2.3634077882 AU
orbital period P: 3.6333563425 yr
(= 1327.1084681 d)
eccentricity e: 0.247037778
perihelion distance q: 1.779556779 AU
aphelion distance Q: 2.947258797 AU
inclination i: 2.3778571°
argument of perihelion ω: 358.181402°
ascending node Ω: 13.666526°
mean anomaly M: 58.781524°
perihelion passage TP: 2018 Sep 22.307060
Epoch: 2019 Apr 27
data arc: 1949-2019 (1789 obs.)
Earth MOID: 0.778896 AU
Jupiter Tisserand invariant TJ: 3.507


orbital data, secondary:
semimajor axis as: 11 km [*E]
separation/primary radius as/rp:5.4 [*E]
separation/Hill radius as/rH:0.014 [*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: 4.38 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: 760 km [*E]

other data, primary:
diameter dp: 4.09 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: 1.47 km [*E]
diameter ratio ds/dp: 0.36 ± 0.04 [W19c]
component mag. difference ΔM: 2.2 ± 0.2 [*D]
rotation period RPs: ?

-- (20882) Paulsanchez --discovery and notes:

Primary discovered 2000 Nov 03 from Socorro, New Mexico, USA by LINEAR Program. Alternate designation(s): 2000 VH57, 1999 JL6. Linked to prediscovery observations from 1949 Nov 21. Permanent number assigned 2001 Jan 09.

Named 2019 Aug 27 for Eugene G. Fahnestock (1980-) [MPC115893].

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].

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--Links to ADS abstracts:


© 2018, 2019 by Wm. Robert Johnston.
Last modified 20 October 2019.
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