Asteroids with Satellites Database--Johnston's Archive

(452561) 2005 AB

compiled by Wm. Robert Johnston
last updated 31 December 2015

--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: 3.21736237 AU
orbital period P: 5.77109428 yr
(= 2107.89219 d)
eccentricity e: 0.655379534
perihelion distance q: 1.108768919 AU
aphelion distance Q: 5.32595582 AU
inclination i: 8.1591426°
argument of perihelion ω: 63.668338°
ascending node Ω: 126.279736°
mean anomaly M: 210.127894°
perihelion passage TP: 2016 Oct 16.5395
Epoch: 2014 May 23
data arc: 2005-2011 (1760 obs.)
Earth MOID: 0.170002 AU
Jupiter Tisserand invariant TJ: 2.793

orbital data, secondary:
binary dynamical type:A [P07f]
semimajor axis as: 3.4 km [*E]
separation/primary radius as/rp:3.6 [*E]
separation/Hill radius as/rH:0.021 [*E]
orbital period Ps: 0.7471 ± 0.0004 d [R06b]
eccentricity es: ?
normalized ang. mom. αL: 0.81 [P07f]

other data, system (combined):
absolute mag. H: 17.5 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 1.95 km [*D]
geometric albedo: 0.03 [K06b]
color index U-B: ?
color index B-V: ?
taxonomic type: ?
mass m: ?
density ρ: (1.6 g/cm3) [*A]
Hill radius rH: 160 km [*E]

other data, primary:
diameter dp: >1.9 km [R06b]
rotation period RPp: 3.339 ± 0.002 h [R06b]
amplitude in mag., rotational ΔM: ?
pole direction Β, λ: ? , ?

other data, secondary:
diameter ds: 0.46 km [*D]
diameter ratio ds/dp: 0.24 ± 0.02 [R06b]
component mag. difference ΔM: 3.1 ± 0.2 [*D]
rotation period RPs: ?

-- (452561) 2005 AB --discovery and notes:

Primary discovered 2005 Jan 01 from Catalina Station, Arizona, USA by Catalina Sky Survey. Permanent number assigned 25 December 2015.

Companion discovered 2005 Feb by V. Reddy, R. Dyvig, P. Pravec, and P. Kusnirak using lightcurve observations from University of North Dakota, Grand Forks, North Dakota, USA; Badlands Observatory, Quinn, South Dakota, USA; Ondrejov Observatory, Czech Republic. Announced 2005 Feb 11 [R05b].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:

© 2005-2014, 2015 by Wm. Robert Johnston.
Last modified 31 December 2015.
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