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Asteroids with Satellites Database--Johnston's Archive

(2486) Metsahovi

compiled by Wm. Robert Johnston
last updated9 October 2021

--Orbital and physical data--

(Seethis page for definitions of quantities; source codes in brackets, seethis 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 axisa:2.2681379817 AU
orbital periodP:3.41595711 yr
(= 1247.6783344 d)
eccentricitye:0.080717281
perihelion distanceq:2.08506005 AU
aphelion distanceQ:2.4512159134 AU
inclinationi:8.4061284°
argument of perihelionω:101.497104°
ascending nodeΩ:359.905808°
mean anomalyM:89.669273°
perihelion passageTP:2020 Aug 24.226641
Epoch:2021 Jul 01
data arc:1939-2021(3022 obs.)
Earth MOID:1.12095 AU
Jupiter Tisserand invariantTJ:3.596

orbital data, secondary:

semimajor axisas:67 km[*E]
separation/primary radiusas/rp:17 [*E]
separation/Hill radiusas/rH:0.051 [*E]
orbital periodPs:7.192d [W18f]
eccentricityes:?
normalized ang. mom.αL:?
other data, system (combined):
absolute mag.H:12.56[MPC]
12.14 ± 0.2 [P07a]
slope parameterG:(0.15) [*A]
effective diameterdE:8.42± 0.03 km [M11b]
geometric albedo:0.232± 0.023[M11b]
color indexU-B:?
color indexB-V:?
taxonomic type:?
massm:?
densityρ:(1.6 g/cm3) [*A]
Hill radiusrH:1300 km [*E]

other data, primary:

diameterdp:8.11 km [*D]
rotation periodRPp:4.4518h [P16d]
amplitude in mag., rotationalΔM:0.12 [P16d]
pole directionΒ, λ:?,?

other data, secondary:

diameterds:2.27km [*D]
diameter ratiods/dp:0.28 [W18f]
component mag. differenceΔM:2.76 [*D]
rotation periodRPs:2.6404h [P16d]

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

Primary discovered1939 Mar 22from Turku, Finlandby 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 discovered2006 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. Dyvigusinglightcurve 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.Announced2007 Feb 26 [P07a].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


©2007-2019, 2021by Wm. Robert Johnston.
Last modified9 October 2021.
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