Asteroids with Satellites Database--Johnston's Archive
(523756)
2014 WD509
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:
TNO, Cubewano
orbital data, primary (osculating elements)
[JPL]
: |
semimajor axis a: |
43.7994 AU
| |
orbital period P: |
289.875 yr
(= 105876.8 d)
| |
eccentricity e: |
0.047639
| |
perihelion distance q: |
41.71285 AU
| |
aphelion distance Q: |
45.886 AU
| |
inclination i: |
1.334372°
| |
argument of perihelion ω: |
254.484°
| |
ascending node Ω: |
201.5182°
| |
mean anomaly M: |
327.784°
| |
perihelion passage TP: |
2047 Jun 09.7
| |
Epoch: |
2021 Jul 01
| |
data arc: |
2010-2021
(156 obs.)
| |
Earth MOID: |
40.7301 AU
| |
Jupiter Tisserand invariant TJ: |
5.913
|
| Neptune Tisserand invariant TN: | 3.09694015619662 [*D] |
orbital data, secondary:
|
semimajor axis as: |
7910
± 50 km
(separation)
[G20a]
| |
separation/primary radius as/rp: | 71 [*E] | |
separation/Hill radius as/rH: | 0.012 [*E] | |
orbital period Ps: |
71
d [*E]
| |
eccentricity es: |
?
| |
normalized ang. mom. αL: |
?
|
|
other data, system (combined):
|
absolute mag. H: |
6.04
[MPC]
6.2 ± 0.5 [G20a]
| |
slope parameter G: |
(0.15) [*A]
| |
effective diameter dE: |
273
km [*E]
| |
geometric albedo: |
(0.09
) [*A]
| |
color index U-B: |
?
| |
color index B-V: |
?
| |
taxonomic type: |
?
| |
mass m: |
?
| |
density ρ: |
(1
g/cm3) [*A]
| |
Hill radius rH: |
680000 km [*E]
|
other data, primary:
|
diameter dp: |
222
km [*E]
| |
rotation period RPp: |
?
| |
amplitude in mag., rotational ΔM: |
?
| |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
157
km [*E]
| |
diameter ratio ds/dp: |
0.71
[*D]
| |
component mag. difference ΔM: |
0.75
[G20a]
| |
rotation period RPs: |
?
| |
|
|
--
(523756) 2014 WD509
--discovery and notes:
Primary discovered
2010 Oct 08
from
Haleakala, Hawaii, USA
by
PanSTARRS 1 program.
Permanent number assigned 2018 Sep 25.
Companion discovered
2020 Jul 18
by A. H. Parker, et al., and the Solar System Origins Legacy Survey
using
Hubble Space Telescope
observations from Hubble Space Telescope.
Announced
2020 Jul [G20a].
--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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