Asteroids with Satellites Database--Johnston's Archive

(7225) Huntress

compiled by Wm. Robert Johnston
last updated 21 September 2014

--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: 2.340644707 AU
orbital period P: 3.581058752 yr
(= 1307.981709 d)
eccentricity e: 0.203256012
perihelion distance q: 1.86489460 AU
aphelion distance Q: 2.816394817 AU
inclination i: 6.8716157°
argument of perihelion ω: 203.618323°
ascending node Ω: 275.762402°
mean anomaly M: 271.940960°
perihelion passage TP: 2015 Apr 07.94337
Epoch: 2014 May 23
data arc: 1960-2013 (893 obs.)
Earth MOID: 0.883131 AU
Jupiter Tisserand invariant TJ: 3.527

orbital data, secondary:
semimajor axis as: 10 km [*E]
separation/primary radius as/rp:3.1 [*E]
separation/Hill radius as/rH:0.011 [*E]
orbital period Ps: 0.6113 ± 0.0004 d [P08c]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 13 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 6.68 ± 0.22 km [M11b]
geometric albedo: 0.165 ± 0.016 [M11b]
color index U-B: ?
color index B-V: ?
taxonomic type: S (SMASSII) [JPL]
mass m: ?
density ρ: (1.6 g/cm3) [*A]
Hill radius rH: 950 km [*E]

other data, primary:
diameter dp: 6.54 ± 0.22 km [*D]
rotation period RPp: 2.4400 ± 0.0001 h [P08c]
amplitude in mag., rotational ΔM: 0.11 [P08c]
pole direction Β, λ: ? , ?

other data, secondary:
diameter ds: 1.37 ± 0.14 km [*D]
diameter ratio ds/dp: 0.21 ± 0.02 [P08c]
component mag. difference ΔM: 3.4 ± 0.2 [*D]
rotation period RPs: ?

-- (7225) Huntress --discovery and notes:

Primary discovered 1983 Jan 22 from Anderson Mesa Station, Arizona, USA by E. Bowell. Alternate designation(s): 1983 BH, 1989 XJ. Linked to prediscovery observations from 1960 Oct 26. Permanent number assigned 1996 Oct 26.

Named 1998 Aug 08 for Wesley T. Huntress Jr. (1942-) [MPC32348].

Companion discovered 2007 Dec 07 by D. Pray, P. Pravec, P. Kusnirak, K. Hornoch, M. Husarik, M. Pikler, G. Cervak, S. Gajdos, F. Colas, and J. Lecacheux using lightcurve observations from Carbuncle Hill Observatory, Greene, Rhode Island, USA; Ondrejov Observatory, Czech Republic; Skalnate Pleso Observatory; Modra Observatory, Slovakia; IMCCE and Pic du Midi Observatory. Announced 2008 Jan 31 [P08c].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:

© 2008-2009, 2014 by Wm. Robert Johnston.
Last modified 21 September 2014.
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