Astronomy:2486 Metsähovi
| Discovery [1] | |
|---|---|
| Discovered by | Y. Vaisala |
| Discovery site | Turku Obs. |
| Discovery date | 22 March 1939 |
| Designations | |
| (2486) Metsahovi | |
| Named after | farm near Helsinki Metsähovi Radio Obs.[2] |
| 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) |
| |{{{apsis}}}|helion}} | 2.4489 AU |
| |{{{apsis}}}|helion}} | 2.0874 AU |
| 2.2682 AU | |
| Eccentricity | 0.0797 |
| Orbital period | 3.42 yr (1,248 days) |
| Mean anomaly | 47.042° |
| Mean motion | 0° 17m 18.6s / day |
| Inclination | 8.4101° |
| Longitude of ascending node | 359.97° |
| 101.37° | |
| Known satellites | 1[3][4] |
| Physical characteristics | |
| Dimensions | 7.883±0.062 km[5] 8.42±0.03 km[citation needed] 12.782 km[3] |
| Rotation period | 4.4518 h (0.18549 d)[1] |
| Geometric albedo | 0.232±0.023[citation needed] 0.268±0.031[5] |
| Absolute magnitude (H) | 12.5[1] |
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]
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
| 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 |
| 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
- ↑ 1.0 1.1 1.2 1.3 1.4 "JPL Small-Body Database Browser: 2486 Metsahovi (1939 FY)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2002486. Retrieved 18 June 2017.
- ↑ 2.0 2.1 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.
- ↑ 3.0 3.1 3.2 "LCDB Data for (2486) Metsähovi". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=2486%7CMetsähovi. Retrieved 18 June 2017.
- ↑ 4.0 4.1 Johnston, Robert. "(2486) Metsahovi". http://www.johnstonsarchive.net/astro/astmoons/am-02486.html. Retrieved 28 May 2015.
- ↑ 5.0 5.1 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. doi:10.1088/0004-637X/791/2/121. Bibcode: 2014ApJ...791..121M. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2014ApJ...791..121M. Retrieved 18 June 2017.
- ↑ "2486 Metsahovi (1939 FY)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=2486. Retrieved 18 June 2017.
- ↑ "MPC/MPO/MPS Archive". Minor Planet Center. https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html. 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
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