Asteroids with Satellites Database--Johnston's Archive

(9069) Hovland

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, Hungaria


orbital data, primary (osculating elements) [JPL] :
semimajor axis a: 1.913197745 AU
orbital period P: 2.646354328 yr
(= 966.5809183 d)
eccentricity e: 0.11820467
perihelion distance q: 1.68704883 AU
aphelion distance Q: 2.139346661 AU
inclination i: 19.571723°
argument of perihelion ω: 171.041430°
ascending node Ω: 247.938722°
mean anomaly M: 200.238577°
perihelion passage TP: 2015 Jul 25.95095
Epoch: 2014 May 23
data arc: 1991-2013 (656 obs.)
Earth MOID: 0.700873 AU
Jupiter Tisserand invariant TJ: 3.854


orbital data, secondary:
binary dynamical type:A [M09a]
semimajor axis as: 7.8 km [*E]
separation/primary radius as/rp:5.2 [*E]
separation/Hill radius as/rH:0.020 [*E]
orbital period Ps: 1.264 ± 0.0004 d [W05b]
eccentricity es: ?
normalized ang. mom. αL: 0.82 [M09a]

other data, system (combined):
absolute mag. H: 14.2 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 3.13 km [*D]
geometric albedo: 0.37 [*E]
color index U-B: ?
color index B-V: ?
taxonomic type: ?
mass m: ?
density ρ: (1.6 g/cm3) [*A]
Hill radius rH: 400 km [*E]

other data, primary:
diameter dp: 3 km [W05b]
rotation period RPp: 4.2175 ± 0.0001 h [W05b]
amplitude in mag., rotational ΔM: 0.09 [W05b]
pole direction Β, λ: ? , ?


other data, secondary:
diameter ds: 0.9 km [*D]
diameter ratio ds/dp: >0.30 [W05b]
component mag. difference ΔM: <2.6 [*D]
rotation period RPs: ?

-- (9069) Hovland --discovery and notes:

Primary discovered 1993 Jul 16 from Palomar Observatory, California, USA by E. F. Helin. Alternate designation(s): 1993 OV, 1991 XF5. Linked to prediscovery observations from 1991 Dec 01. Permanent number assigned 1998 Aug 08.

Named 2001 May 09 for Larry E. Hovland (1947-) [MPC42669].

Companion discovered 2004 Oct using lightcurve observations. Announced 2004 Nov 16.

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


© 2004-2006, 2014 by Wm. Robert Johnston.
Last modified 21 September 2014.
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