Asteroids with Satellites Database--Johnston's Archive

2020 AZ2

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: NEA, Amor

orbital data, primary (osculating elements) [JPL] :
semimajor axis a: 1.881473 AU
orbital period P: 2.580805 yr
(= 942.639 d)
eccentricity e: 0.3747486
perihelion distance q: 1.1763937 AU
aphelion distance Q: 2.586552 AU
inclination i: 1.826197°
argument of perihelion ω: 228.72318°
ascending node Ω: 284.11588°
mean anomaly M: 190.3058°
perihelion passage TP: 2022 Sep 18.334
Epoch: 2021 Jul 01
data arc: 2020 Jan-2020 May (226 obs.)
Earth MOID: 0.189531 AU
Jupiter Tisserand invariant TJ: 3.88

orbital data, secondary:
semimajor axis as: 0.36 km [*E]
separation/primary radius as/rp:4.3 [*E]
separation/Hill radius as/rH:0.022 [*E]
orbital period Ps: 0.918 ± 0.002 d [P20b]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 0 [MPC]
21.2 ± 0.22 [JPL]
slope parameter G: (0.15) [*A]
effective diameter dE: 0.19 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: 16 km [*E]

other data, primary:
diameter dp: 0.17 km [*E]
rotation period RPp: 2.3582 h [W21b]
amplitude in mag., rotational ΔM: 0.05 [W21b]
pole direction Β, λ: ? , ?

other data, secondary:
diameter ds: >0.089 km [*E]
diameter ratio ds/dp: >0.53 [W21b]
component mag. difference ΔM: <1.38 [*D]
rotation period RPs: ?

-- 2020 AZ2 --discovery and notes:

Primary discovered 2020 Jan 06 from Mount Lemmon, Arizona, USA by Mount Lemmon Survey.

Companion discovered 2020 Feb 19 by P. Pravec, P. Kusnirak, K. Hornoch, H. Kucakova, and P. Fatka using lightcurve observations. Announced 2020 Mar 09 [P20b].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:

© 2020, 2021 by Wm. Robert Johnston.
Last modified 9 October 2021.
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