| Discovery[1] | |
|---|---|
| Discovered by | L. Oterma |
| Discovery site | Turku Obs. |
| Discovery date | 15 October 1941 |
| Designations | |
| (1544) Vinterhansenia | |
Named after | Julie Vinter Hansen (astronomer)[2] |
| 1941 UK · 1928 DO 1937 RK · 1939 CL 1948 QT · 1974 YB A906 DB · A919 UB | |
| main-belt · (inner)[3] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 111.12 yr (40,586 days) |
| Aphelion | 2.6230AU |
| Perihelion | 2.1227 AU |
| 2.3729 AU | |
| Eccentricity | 0.1054 |
| 3.66yr (1,335 days) | |
| 251.35° | |
| 0° 16m 10.56s / day | |
| Inclination | 3.3342° |
| 59.973° | |
| 356.51° | |
| Physical characteristics | |
| Dimensions | 20.76±2.50 km[4] 21.63 km(derived)[3] 21.71±1.5 km[5] 24.29±6.90 km[6] 24.561±0.080 km[7] 26.230±0.201 km[8] |
| 13.7±0.1h[9] 13.77±0.01 h[10] | |
| 0.0404±0.0052[8] 0.046±0.041[6] 0.058±0.007[7] 0.0599(derived)[3] 0.06±0.01[4] 0.0784±0.012[5] | |
| X[11] · C[3] | |
| 11.7[5][8] · 12.0[1][3] · 12.02[4] · 12.05[6] · 12.06±0.25[11] | |
1544 Vinterhansenia (provisional designation1941 UK) is a darkasteroid from the inner regions of theasteroid belt, approximately 22 kilometers in diameter. It was discovered on 15 October 1941, by Finnish astronomerLiisi Oterma atTurku Observatory in Southwest Finland, and named for Danish astronomerJulie Vinter Hansen.[2][12]
Vinterhansenia is classified as bothC-type andX-type asteroid.[3][11] It orbits the Sun in theinner main-belt at a distance of 2.1–2.6 AU once every 3 years and 8 months (1,335 days). Its orbit has aneccentricity of 0.11 and aninclination of 3° with respect to theecliptic.[1] Vinterhansenia was first identified asA906 DB atHeidelberg Observatory in 1906. Its first used observation,1928 DO, was also taken at Heidelberg in 1928, and extends the body'sobservation arc by 13 years prior to its official discovery observation at Turku in 1941.
Two rotationallightcurves of Vinterhansenia were obtained from photometric observations taken by Kevin Ivarsen in October 2003, andLaurent Bernasconi in March 2005. Lightcurve analysis gave arotation period of 13.7 and 13.77 hours with a brightness variation of 0.15 and 0.18magnitude, respectively (U=2/2).[9][10]
According to the space-based surveys carried out by the Infrared Astronomical SatelliteIRAS, and NASA'sWide-field Infrared Survey Explorer with its subsequentNEOWISE mission, Vinterhansenia measures between 20.76 and 26.23 kilometers in diameter, and its surface has analbedo between 0.040 and 0.078.[4][5][6][7][8] TheCollaborative Asteroid Lightcurve Link assumes an albedo of 0.0599 and a diameter of 21.63 kilometers with anabsolute magnitude of 12.0.[3]
Thisminor planet was named for Danish astronomerJulie Vinter Hansen (1890–1960), who worked at theCopenhagen Observatory and was director of theInternational Astronomical Union's telegram bureau and Editor of its Circulars(also seeCentral Bureau for Astronomical Telegrams)[2] The officialnaming citation was published by theMinor Planet Center in January 1956 (M.P.C. 1350).[13]
