1500 Jyväskylä
| Discovery [1] | |
|---|---|
| Discovered by | Y. Väisälä |
| Discovery site | Turku Obs. |
| Discovery date | 16 October 1938 |
| Designations | |
| (1500) Jyväskylä | |
| Pronunciation | jyvæs-kylæ |
Named after | Jyväskylä (Finnish city)[2] |
| 1938 UH | |
| main-belt · Flora [3] | |
| Orbital characteristics [1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 68.59 yr (25,051 days) |
| Aphelion | 2.6685 AU |
| Perihelion | 1.8186 AU |
| 2.2435 AU | |
| Eccentricity | 0.1894 |
| 3.36 yr (1,227 days) | |
| 172.97° | |
| 0° 17m 35.88s / day | |
| Inclination | 7.4359° |
| 19.925° | |
| 17.100° | |
| Physical characteristics | |
| Dimensions | 6.63 km (calculated)[3] 7.39±1.59 km[4] 8.088±0.103 km[5] 8.095±0.136 km[6] |
| 8.82750±0.00001 h[7] | |
| 0.161±0.050[6] 0.1614±0.0254[5] 0.24 (assumed)[3] 0.31±0.13[4] | |
| Tholen = S [1] · S [3] B–V = 0.920[1] U–B = 0.520[1] | |
| 12.76[4] · 13.06[1][3][5] | |
1500 Jyväskylä (jyvæs-kylæ), provisional designation 1938 UH, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 7 kilometers in diameter. It was discovered on 16 October 1938, by Finnish astronomer Yrjö Väisälä at the Turku Observatory in Southwest Finland.[8] It was named for the Finnish town Jyväskylä.[2]
Classification and orbit
Jyväskylä is a member of the Flora family, a large collisional group of stony asteroids. It orbits the Sun in the inner main-belt at a distance of 1.8–2.7 AU once every 3 years and 4 months (1,227 days). Its orbit has an eccentricity of 0.19 and an inclination of 7° with respect to the ecliptic.[1] The body's observation arc begins at Turku, 3 weeks prior to its official discovery observation.[8]
Physical characteristics
In 2016, a modeled lightcurve was derived from data contained in the Lowell photometric database. Light-curve analysis gave it a rotation period of 8.8275 hours and a spin axis of (123°, −75.0°) in ecliptic coordinates (U=n.a.).[7]
According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, the asteroid measures between 7.39 and 8.095 kilometers in diameter, and its surface has an albedo between 0.161 and 0.31.[4][5][6] The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.24 – derived from 8 Flora, the largest member and namesake of this family – and calculates a diameter of 6.63 kilometers, using an absolute magnitude of 13.06.[3]
Naming
This minor planet was named for the Finnish town Jyväskylä.[2] It is the largest city in the region of Central Finland and on the Finnish Lakeland. The approved naming citation was published by the Minor Planet Center before November 1977 (M.P.C. 3928).[9]
References
- ^ a b c d e f g "JPL Small-Body Database Browser: 1500 Jyvaskyla (1938 UH)" (2017-05-02 last obs.). Jet Propulsion Laboratory. Retrieved 30 June 2017.
- ^ a b c Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (1500) Jyväskylä. Springer Berlin Heidelberg. p. 119. ISBN 978-3-540-00238-3. Retrieved 4 January 2017.
- ^ a b c d e f "LCDB Data for (1500) Jyväskylä". Asteroid Lightcurve Database (LCDB). Retrieved 4 January 2017.
- ^ a b c d Nugent, C. R.; Mainzer, A.; Bauer, J.; Cutri, R. M.; Kramer, E. A.; Grav, T.; et al. (September 2016). "NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos". The Astronomical Journal. 152 (3): 12. arXiv:1606.08923. Bibcode:2016AJ....152...63N. doi:10.3847/0004-6256/152/3/63. Retrieved 4 January 2017.
{{cite journal}}: CS1 maint: unflagged free DOI (link) - ^ a b c d Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results" (PDF). The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved 4 January 2017.
- ^ a b c 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 4 January 2017.
- ^ a b Durech, J.; Hanus, J.; Oszkiewicz, D.; Vanco, R. (March 2016). "Asteroid models from the Lowell photometric database". Astronomy and Astrophysics. 587: 6. arXiv:1601.02909. Bibcode:2016A&A...587A..48D. doi:10.1051/0004-6361/201527573. Retrieved 4 January 2017.
- ^ a b "1500 Jyvaskyla (1938 UH)". Minor Planet Center. Retrieved 4 January 2017.
- ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 4 January 2017.
External links
- MPC - conversion abs. magnitude to diameter
- 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
- 1500 Jyväskylä at the JPL Small-Body Database
