Asteroids with Satellites Database--Johnston's Archive

(410777) 2009 FD

compiled by Wm. Robert Johnston
last updated 27 November 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, Apollo

orbital data, primary (osculating elements) [JPL] :
semimajor axis a: 1.1631569199 AU
orbital period P: 1.254461864 yr
(= 458.20084948 d)
eccentricity e: 0.492921576
perihelion distance q: 0.589811778 AU
aphelion distance Q: 1.7365020618 AU
inclination i: 3.1364499°
argument of perihelion ω: 281.316741°
ascending node Ω: 9.475028°
mean anomaly M: 307.4865823°
perihelion passage TP: 2015 Sep 01.8380350
Epoch: 2015 Jun 27
data arc: 2009-2015 (291 obs.)
Earth MOID: 0.00231683 AU
Jupiter Tisserand invariant TJ: 5.295

orbital data, secondary:
semimajor axis as: 0.25 km [N15d]
separation/primary radius as/rp:3.0 [*D]
separation/Hill radius as/rH:0.034 [*E]
orbital period Ps: 0.6 d [*E]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 22.1 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 0.17 ± 0.04 km [*D]
geometric albedo: 0.09 [*D]
color index U-B: ?
color index B-V: ?
taxonomic type: ?
mass m: ?
density ρ: (1.6 g/cm3) [*A]
Hill radius rH: 7 km [*E]

other data, primary:
diameter dp: 0.15 ± 0.03 km [N15d]
rotation period RPp: 4 h [JPL]
amplitude in mag., rotational ΔM: ?
pole direction Β, λ: ? , ?

other data, secondary:
diameter ds: 0.09 ± 0.03 km [N15d]
diameter ratio ds/dp: 0.6 [*D]
component mag. difference ΔM: 1.1 [*D]
rotation period RPs: ?

-- (410777) 2009 FD --discovery and notes:

Primary discovered 2009 Feb 24 from Kitt Peak Observatory, Arizona, USA by Spacewatch Program. Permanent number assigned -.

Companion discovered 2015 Oct 25 by S. P. Naidu, L. A. M. Benner, M. Brozovic, J. D. Giorgini, J. S. Jao, C. G. Lee, L. G. Snedeker, K. J. Lawrence, M. W. Busch, P. A. Taylor, J. E. Richardson, and E. G. Rivera-Valentin using radar observations from Goldstone Observatory, California, USA; Arecibo Observatory, Puerto Rico. Announced 2015 Oct [N15d].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:

© 2015 by Wm. Robert Johnston.
Last modified 27 November 2015.
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