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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