Asteroids with Satellites Database--Johnston's Archive

(310560) 2001 QL142

compiled by Wm. Robert Johnston
last updated 11 November 2017

--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: 1.049235877 AU
orbital period P: 1.074755555 yr
(= 392.5618805 d)
eccentricity e: 0.49901239
perihelion distance q: 0.52565417 AU
aphelion distance Q: 1.5728175801 AU
inclination i: 26.614762°
argument of perihelion ω: 72.080316°
ascending node Ω: 165.597988°
mean anomaly M: 43.769448°
perihelion passage TP: 2017 Jul 18.271620
Epoch: 2017 Sep 04
data arc: 1974-2017 (208 obs.)
Earth MOID: 0.0478481 AU
Jupiter Tisserand invariant TJ: 5.655


orbital data, secondary:
semimajor axis as: ?
orbital period Ps: ?
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 17.8 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 0.92 km [*E]
geometric albedo: (0.16 ) [*A]
color index U-B: ?
color index B-V: ?
taxonomic type: ?
mass m: ?
density ρ: (1.6 g/cm3) [*A]
Hill radius rH: 38 km [*D]

other data, primary:
diameter dp: 0.92 km [*E]
rotation period RPp: ?
amplitude in mag., rotational ΔM: ?
pole direction Β, λ: ? , ?


other data, secondary:
diameter ds: ?
diameter ratio ds/dp: ?
component mag. difference ΔM: ?
rotation period RPs: ?

-- (310560) 2001 QL142 --discovery and notes:

Primary discovered 2001 Aug 24 from Anderson Mesa Station, Arizona, USA by LONEOS Program. Linked to prediscovery observations from 1974 Oct 14. Permanent number assigned 2012 Jan 09.

Companion discovered 2017 Sep using radar observations. Announced 2017 Sep.

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


© 2017 by Wm. Robert Johnston.
Last modified 11 November 2017.
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