Asteroids with Satellites Database--Johnston's Archive

2015 VM173

compiled by Wm. Robert Johnston
last updated 17 August 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: TNO, Cubewano

orbital data, primary (osculating elements) [JPL] :
semimajor axis a: 43.741 AU
orbital period P: 289.3 yr
(= 105665.1 d)
eccentricity e: 0.05834
perihelion distance q: 41.189 AU
aphelion distance Q: 46.293 AU
inclination i: 2.4365°
argument of perihelion ω: 93.47°
ascending node Ω: 183.778°
mean anomaly M: 131.67°
perihelion passage TP: 1913 Jul 06.0
Epoch: 2019 Apr 27
data arc: 2014-2017 (38 obs.)
Earth MOID: 40.173 AU
Jupiter Tisserand invariant TJ: 5.903

orbital data, secondary:
semimajor axis as: 5290 ± 70 km (separation) [G19c]
separation/primary radius as/rp:52.9 [*E]
separation/Hill radius as/rH:0.008 [*E]
orbital period Ps: 41 d [*E]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 6.1 [MPC]
6.5 ± 0.5 [G19c]
slope parameter G: (0.15) [*A]
effective diameter dE: 265 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: 690000 km [*E]

other data, primary:
diameter dp: 200 km [*E]
rotation period RPp: ?
amplitude in mag., rotational ΔM: ?
pole direction Β, λ: ? , ?

other data, secondary:
diameter ds: 174 km [*E]
diameter ratio ds/dp: 0.87 [*D]
component mag. difference ΔM: 0.3 [G19c]
rotation period RPs: ?

-- 2015 VM173 --discovery and notes:

Primary discovered 2015 Nov 07 from Mauna Kea Observatory, Hawaii, USA by Outer Solar System Origins Survey. Linked to prediscovery observations from 2014 Nov 17.

Companion discovered 2019 Aug 03 using Hubble Space Telescope observations. Announced 2019 Aug [G19c].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:

© 2019 by Wm. Robert Johnston.
Last modified 17 August 2019.
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