_Jyv%25C3%25A4skyl%25C3%25A4.png) Shape model of Jyväskylä from itslightcurve | |
| Discovery[1] | |
|---|---|
| Discovered by | Y. Väisälä |
| Discovery site | Turku Obs. |
| Discovery date | 16 October 1938 |
| Designations | |
| (1500) Jyväskylä | |
| Pronunciation | Finnish:[ˈjyʋæsˌkylæ] |
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 | 2.6685AU |
| Perihelion | 1.8186 AU |
| 2.2435 AU | |
| Eccentricity | 0.1894 |
| 3.36yr (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±0.00001h[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 (Finnish:[ˈjyʋæsˌkylæ]; provisional designation1938 UH) is a stony Florianasteroid from the inner regions of theasteroid belt, approximately 7 kilometers in diameter. It was discovered on 16 October 1938, by Finnish astronomerYrjö Väisälä at theTurku Observatory in Southwest Finland.[8] It was named for the Finnish townJyväskylä.[2]
Jyväskylä is a member of theFlora family, a large collisional group ofstony asteroids. It orbits the Sun in theinner main-belt at a distance of 1.8–2.7 AU once every 3 years and 4 months (1,227 days). Its orbit has aneccentricity of 0.19 and aninclination of 7° with respect to theecliptic.[1] The body'sobservation arc begins at Turku, 3 weeks prior to its official discovery observation.[8]
In 2016, Jyväskylä's modeledlightcurve was derived from data contained in the Lowell photometric database. Lightcurve analysis revealed arotation period of 8.8275 hours and a spin axis of (123°, −75.0°) inecliptic coordinates (U=n.a.).[7]
According to the survey carried out by NASA'sWide-field Infrared Survey Explorer (WISE) with its subsequentNEOWISE mission, the asteroid measures between 7.39 and 8.095 kilometers in diameter, and its surface has analbedo between 0.161 and 0.31.[4][5][6] TheCollaborative Asteroid Lightcurve Link assumes an albedo of 0.24 – derived from8 Flora, the largest member and namesake of this family – and calculates a diameter of 6.63 kilometers, using anabsolute magnitude of 13.06.[3]
Thisminor planet was named for the Finnish townJyväskylä.[2] It is the largest city in the region ofCentral Finland and on theFinnish Lakeland. The officialnaming citation was published by theMinor Planet Center on 20 February 1976 (M.P.C. 3928).[9]
