2486 Metsähovi

2486 Metsähovi, provisional designation 1939 FY, is a stony asteroid and synchronous binary system from the inner regions of the asteroid belt, approximately 10 kilometers in diameter. It was discovered on 22 March 1939, by Finnish astronomer Yrjö Väisälä at the Turku Observatory.[6]

2486 Metsahovi

Discovery [1]
Discovered by	Y. Vaisala
Discovery site	Turku Obs.
Discovery date	22 March 1939
Designations
MPC designation	(2486) Metsahovi
Named after	farm near Helsinki Metsähovi Radio Obs.[2]
Alternative designations	1939 FY · 1961 TZ 1970 FE · 1970 GN 1975 WC · 1978 SW2
Minor planet category	main-belt · (inner)[3]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc	78.11 yr (28,531 days)
Aphelion	2.4489 AU
Perihelion	2.0874 AU
Semi-major axis	2.2682 AU
Eccentricity	0.0797
Orbital period	3.42 yr (1,248 days)
Mean anomaly	47.042°
Mean motion	0° 17^m 18.6^s / day
Inclination	8.4101°
Longitude of ascending node	359.97°
Argument of perihelion	101.37°
Known satellites	1[3][4]
Physical characteristics
Dimensions	7.883±0.062 km[5] 8.42±0.03 km 12.782 km[3]
Rotation period	4.4518 h (0.18549 d)[1]
Geometric albedo	0.232±0.023 0.268±0.031[5]
Absolute magnitude (H)	12.5[1]

Orbit and classification

Metsähovi orbits the Sun at a distance of 2.1–2.4 AU once every 3 years and 5 months (1,248 days). Its orbit has an eccentricity of 0.08 and an inclination of 8° with respect to the ecliptic.[1]

Naming

This minor planet was named for a donated farm near Helsinki, where various institutes have established their observing stations: the Finnish Geodetic Institute for space geodesy, the University of Helsinki for astrophysics, and the Helsinki University of Technology for radio astronomy. (Also see Metsähovi Radio Observatory).[2] The approved naming citation was published by the Minor Planet Center on 26 May 1983 (M.P.C. 7946).[7]

Satellite

S/2006 (2486) 1

Discovery
Discovered 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
Discovery date	2006/12/12
Detection method	Light curve
Orbital characteristics
Satellite of	22486 Metsähovi
Physical characteristics
Sidereal rotation period	2.6404 hours

A moon was discovered in 2006 from lightcurve observations and announced in 2007.[4]

References

1. "JPL Small-Body Database Browser: 2486 Metsahovi (1939 FY)" (2017-03-29 last obs.). Jet Propulsion Laboratory. Retrieved 18 June 2017.
2. Schmadel, Lutz D. (2007). "(2486) Metsähovi". Dictionary of Minor Planet Names – (2486) Metsähovi. Springer Berlin Heidelberg. p. 203. doi:10.1007/978-3-540-29925-7_2487. ISBN 978-3-540-00238-3.
3. "LCDB Data for (2486) Metsähovi". Asteroid Lightcurve Database (LCDB). Retrieved 18 June 2017.
4. Johnston, Robert. "(2486) Metsahovi". johnstonsarchive.net. Retrieved 28 May 2015.
5. Masiero, Joseph R.; Grav, T.; Mainzer, A. K.; Nugent, C. R.; Bauer, J. M.; Stevenson, R.; et al. (August 2014). "Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos". The Astrophysical Journal. 791 (2): 11. arXiv:1406.6645. Bibcode:2014ApJ...791..121M. doi:10.1088/0004-637X/791/2/121. Retrieved 18 June 2017.
6. "2486 Metsahovi (1939 FY)". Minor Planet Center. Retrieved 18 June 2017.
7. "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 18 June 2017.

External links

• Asteroids with Satellites, Robert Johnston, johnstonsarchive.net
• Asteroid Lightcurve Database (LCDB), query form (info)
• Dictionary of Minor Planet Names, Google books
• Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
• Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
• 2486 Metsähovi at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters