Asteroids with Satellites Database--Johnston's Archive

(143649) 2003 QQ47

compiled by Wm. Robert Johnston
last updated 25 September 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, Apollo (PHA)


orbital data, primary (osculating elements) [JPL] :
semimajor axis a: 1.0853944594 AU
orbital period P: 1.1307885452 yr
(= 413.02831666 d)
eccentricity e: 0.186964535
perihelion distance q: 0.882464189 AU
aphelion distance Q: 1.2883247299 AU
inclination i: 62.1005666°
argument of perihelion ω: 104.9700391°
ascending node Ω: 0.990674°
mean anomaly M: 204.595929°
perihelion passage TP: 2021 Dec 26.295227
Epoch: 2021 Jul 01
data arc: 2003-2021 (581 obs.)
Earth MOID: 0.003443 AU
Jupiter Tisserand invariant TJ: 5.214


orbital data, secondary:
semimajor axis as: 1.4 km [*E]
separation/primary radius as/rp:3.0 [*E]
separation/Hill radius as/rH:0.021 [*E]
orbital period Ps: 0.54438 ± 0.00075 d [P21f]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 17.41 [MPC]
17.66 ± 0.32 [P21f]
slope parameter G: (0.33) [*A]
effective diameter dE: 0.995 ± 0.42 km [N19a]
geometric albedo: 0.136 ± 0.079 [N19a]
color index U-B: ?
color index B-V: ?
color index V-R:0.426 ± 0.01 [P21f]
taxonomic type: Sq (SMASSII) [P21f]
mass m: ?
density ρ: (1.6 g/cm3) [*A]
Hill radius rH: 66 km [*E]

other data, primary:
diameter dp: 0.94 ± 0.40 km [*D]
rotation period RPp: 2.6446 ± 0.0007 h [P12f]
amplitude in mag., rotational ΔM: 0.07 [P21f]
amplitude in mag., mutual events ΔM:0.11 [P21f]
pole direction Β, λ: ? , ?


other data, secondary:
diameter ds: 0.31 ± 0.13 km [*D]
axial ratios a/b, b/c:1.4;? []
diameter ratio ds/dp: 0.33 ± 0.02 [P21f]
component mag. difference ΔM: 2.41 ± 0.13 [*D]
rotation period RPs: 13.065 ± 0.018 h [P21f]

-- (143649) 2003 QQ47 --discovery and notes:

Primary discovered 2003 Aug 24 from Socorro, New Mexico, USA by LINEAR Program. Permanent number assigned 2006 Dec 05.

Companion discovered 2021 Aug 29 by P. Pravec, P. Kusnirak, K. Hornoch, P. Fatka, C. Snodgrass, T. Hinse, J. Tregloan-Reed, M. Devogele, N. Moskovitz using lightcurve observations from La Silla station, European Southern Observatory. Announced 2021 Sep 17 [P21f].

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© 2021 by Wm. Robert Johnston.
Last modified 25 September 2021.
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