Asteroids with Satellites Database--Johnston's Archive

(2486) Metsahovi

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: 2.2681379817 AU
orbital period P: 3.41595711 yr
(= 1247.6783344 d)
eccentricity e: 0.080717281
perihelion distance q: 2.08506005 AU
aphelion distance Q: 2.4512159134 AU
inclination i: 8.4061284°
argument of perihelion ω: 101.497104°
ascending node Ω: 359.905808°
mean anomaly M: 89.669273°
perihelion passage TP: 2020 Aug 24.226641
Epoch: 2021 Jul 01
data arc: 1939-2021 (3022 obs.)
Earth MOID: 1.12095 AU
Jupiter Tisserand invariant TJ: 3.596

orbital data, secondary:
semimajor axis as: 67 km [*E]
separation/primary radius as/rp:17 [*E]
separation/Hill radius as/rH:0.051 [*E]
orbital period Ps: 7.192 d [W18f]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 12.56 [MPC]
12.14 ± 0.2 [P07a]
slope parameter G: (0.15) [*A]
effective diameter dE: 8.42 ± 0.03 km [M11b]
geometric albedo: 0.232 ± 0.023 [M11b]
color index U-B: ?
color index B-V: ?
taxonomic type: ?
mass m: ?
density ρ: (1.6 g/cm3) [*A]
Hill radius rH: 1300 km [*E]

other data, primary:
diameter dp: 8.11 km [*D]
rotation period RPp: 4.4518 h [P16d]
amplitude in mag., rotational ΔM: 0.12 [P16d]
pole direction Β, λ: ? , ?

other data, secondary:
diameter ds: 2.27 km [*D]
diameter ratio ds/dp: 0.28 [W18f]
component mag. difference ΔM: 2.76 [*D]
rotation period RPs: 2.6404 h [P16d]

-- (2486) Metsahovi --discovery and notes:

Primary discovered 1939 Mar 22 from Turku, Finland by Y. Vaisala. Alternate designation(s): 1939 FY, 1961 TZ, 1970 FE, 1970 GN, 1975 WC, 1978 SW2. Linked to prediscovery observations from 1939 Feb 16. Permanent number assigned 1981 Nov 11.

Named 1983 May 26 for a farm near Helsinki, Finland [MPC007946].

Companion discovered 2006 Dec 12 by M. Pikler, M. Husarik, G. Cervak, W. Cooney, J. Gross, D. Terrell, P. Pravec, P. Kusnirak, A. Galad, J. Vilagi, L. Kornos, S. Gajdos, V. Reddy, and R. Dyvig using lightcurve observations from Skalnate Pleso Observatory, Slovakia; Sonoita Research Observatory, Sonoita, Arizona, USA; Ondrejov Observatory, Czech Republic; Modra Observatory, Slovakia; University of North Dakota, Grand Forks, North Dakota, USA; Badlands Observatory, Quinn, South Dakota, USA. Announced 2007 Feb 26 [P07a].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:

© 2007-2019, 2021 by Wm. Robert Johnston.
Last modified 9 October 2021.
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