Asteroids with Satellites Database--Johnston's Archive

(1717) Arlon

compiled by Wm. Robert Johnston
last updated 9 October 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: main belt asteroid

orbital data, primary (osculating elements) [JPL] :
semimajor axis a: 2.1956133357 AU
orbital period P: 3.253433934 yr
(= 1188.3167445 d)
eccentricity e: 0.1285790647
perihelion distance q: 1.913303427 AU
aphelion distance Q: 2.4779232448 AU
inclination i: 6.19158684°
argument of perihelion ω: 116.3880453°
ascending node Ω: 340.4240032°
mean anomaly M: 286.4650977°
perihelion passage TP: 2022 Feb 28.729877
Epoch: 2021 Jul 01
data arc: 1930-2021 (3168 obs.)
Earth MOID: 0.939575 AU
Jupiter Tisserand invariant TJ: 3.651

orbital data, secondary:
binary dynamical type:A [M09a]
semimajor axis as: 54 km [*E]
separation/primary radius as/rp:13.2 [*E]
separation/Hill radius as/rH:0.043 [*E]
orbital period Ps: 4.88 d [C06d]
eccentricity es: ?
normalized ang. mom. αL: 2.02 [M09a]

other data, system (combined):
absolute mag. H: 12.32 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 9.13 ± 0.17 km [M11b]
geometric albedo: 0.249 ± 0.042 [M11b]
color index U-B: ?
color index B-V: ?
taxonomic type: S (Tholen) [JPL]
mass m: ?
density ρ: (1.6 g/cm3) [*A]
Hill radius rH: 1300 km [*E]

other data, primary:
diameter dp: 8.17 ± 0.15 km [*D]
rotation period RPp: 5.148 h [C06d]
amplitude in mag., rotational ΔM: 0.08 [C06a]
pole direction Β, λ: ? , ?

other data, secondary:
diameter ds: >4.08 km [*D]
diameter ratio ds/dp: >0.5 [C06a]
component mag. difference ΔM: <1.51 [*E]
rotation period RPs: 18.23 h [C06d]

-- (1717) Arlon --discovery and notes:

Primary discovered 1954 Jan 08 from Uccle, Belgium by S. J. Arend. Alternate designation(s): 1954 AC, 1930 YU, 1941 BJ, 1946 UB, 1951 GQ, 1954 CE, 1977 FQ3, 1978 PC5, A915 CC. Linked to prediscovery observations from 1930 Dec 20. Permanent number assigned -.

Named 1983 Sep 22 for the town of Arlon, Luxembourg province, Belgium [MPC008150].

Companion discovered 2005 Dec 04 by W. Cooney, J. Gross, D. Terrell, R. Stephens, P. Pravec, P. Kusnirak, R. Durkee, and A. Galad using lightcurve observations from Sonoita Research Observatory, Sonoita, Arizona, USA; Yucca Valley, California, USA; Ondrejov Observatory, Czech Republic; Minneapolis, Minnesota, USA; Modra Observatory, Slovakia. Announced 2006 Jan 17 [C06a].

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--Links to ADS abstracts:

© 2006-2014, 2021 by Wm. Robert Johnston.
Last modified 9 October 2021.
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