Asteroids with Satellites Database--Johnston's Archive

2016 AZ8

compiled by Wm. Robert Johnston
last updated 9 January 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: NEA, Apollo (PHA)

orbital data, primary (osculating elements) [JPL] :
semimajor axis a: 1.320515176 AU
orbital period P: 1.517452464 yr
(= 554.25998 d)
eccentricity e: 0.355120991
perihelion distance q: 0.851572518 AU
aphelion distance Q: 1.78945783 AU
inclination i: 5.5862397°
argument of perihelion ω: 318.50622°
ascending node Ω: 90.016183°
mean anomaly M: 99.622696°
perihelion passage TP: 2018 Nov 24.619796
Epoch: 2019 Apr 27
data arc: 2012-2016 (119 obs.)
Earth MOID: 0.0295161 AU
Jupiter Tisserand invariant TJ: 4.878

orbital data, secondary:
semimajor axis as: >0.42 ± 0.045 km [V19a]
separation/primary radius as/rp:2.0 [*D]
separation/Hill radius as/rH:0.014 [*E]
orbital period Ps: 0.3 d [*E]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 21 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 0.47 km [*D]
geometric albedo: 0.04 ± 0.01 [V19a]
color index U-B: ?
color index B-V: ?
taxonomic type: ?
mass m: ?
density ρ: (1.6 g/cm3) [*A]
Hill radius rH: 29 km [*E]

other data, primary:
diameter dp: 0.42 ± 0.06 km [V19a]
rotation period RPp: <7 h [V19a]
amplitude in mag., rotational ΔM: ?
pole direction Β, λ: ? , ?

other data, secondary:
diameter ds: <0.18 ± 0.03 km [V19a]
diameter ratio ds/dp: 0.43 [*D]
component mag. difference ΔM: 1.8 [*D]
rotation period RPs: <40 h [V19a]

-- 2016 AZ8 --discovery and notes:

Primary discovered 2016 Jan 03 from WISE by WISE. Linked to prediscovery observations from 2012 Jul 21.

Companion discovered 2019 Jan 04 by A. K. Virkki, S. E. Marshall, F. C. F. Venditti, L. F. Zambrano Marin, E. G. Rivera-Valentin, and P. A. Taylor using radar observations from Arecibo Observatory, Puerto Rico. Announced 2019 Jan 08 [V19a].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:

© 2019 by Wm. Robert Johnston.
Last modified 9 January 2019
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