Asteroids with Satellites Database--Johnston's Archive

2020 AZ2

compiled by Wm. Robert Johnston
last updated 22 March 2020

--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: 1.88081 AU
orbital period P: 2.57939 yr
(= 942.14 d)
eccentricity e: 0.374379
perihelion distance q: 1.176674 AU
aphelion distance Q: 2.58494 AU
inclination i: 1.82854°
argument of perihelion ω: 228.563°
ascending node Ω: 284.1646°
mean anomaly M: 39.2676°
perihelion passage TP: 2020 Feb 18.23459
Epoch: 2020 May 31
data arc: 2020 Jan-2020 Mar (130 obs.)
Earth MOID: 0.189091 AU
Jupiter Tisserand invariant TJ: 3.881


orbital data, secondary:
semimajor axis as: ?
orbital period Ps: ?
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 21.2 [MPC]
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: 17 km [*E]

other data, primary:
diameter dp: 0.19 km [*E]
rotation period RPp: ?
amplitude in mag., rotational ΔM: ?
pole direction Β, λ: ? , ?


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

-- 2020 AZ2 --discovery and notes:

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

Companion discovered 2020 Feb by Pravec, P., 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 by Wm. Robert Johnston.
Last modified 22 March 2020.
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