| Discovery[1] | |
|---|---|
| Discovered by | P. Wild |
| Discovery site | Zimmerwald Obs. |
| Discovery date | 24 November 1973 |
| Designations | |
| (2038) Bistro | |
| Pronunciation | /ˈbiːstroʊ/ |
Named after | Bistro (Small restaurant; French)[2] |
| 1973 WF · 1941 KD | |
| main-belt · (inner)[3] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 43.53 yr (15,899 days) |
| Aphelion | 2.6556AU |
| Perihelion | 2.2139 AU |
| 2.4347 AU | |
| Eccentricity | 0.0907 |
| 3.80yr (1,388 days) | |
| 5.0403° | |
| 0° 15m 33.84s / day | |
| Inclination | 14.809° |
| 73.475° | |
| 183.69° | |
| Physical characteristics | |
| Dimensions | 10.55±0.76 km[4] 10.959±0.083 km[5] 11.82±2.64 km[6] 12.192±0.028 km[7] 12.58±1.2 km[8] 12.69 km(derived)[3] 13.52±0.37 km[9] |
| 7.88h(dated)[10] 7.89 h(dated)[a] 8 h(dated)[11] 17.051±0.006 h[12] | |
| 0.1342±0.030[8] 0.1433±0.0218[7] 0.168±0.032[9] 0.1739(derived)[3] 0.191±0.029[4] 0.25±0.10[6] | |
| SMASS = Sa[1] · S[3] | |
| 11.90[6][9] · 12.0[1][3] · 12.3[4][7][8] · 12.39±0.46[13] | |
2038 Bistro (/ˈbiːstroʊ/), provisional designation1973 WF, is a stonyasteroid from the inner regions of theasteroid belt, approximately 12 kilometers in diameter. The asteroid was discovered on 24 November 1973, by Swiss astronomerPaul Wild at theZimmerwald Observatory near Bern, Switzerland.[14] It was named for theBistro restaurant.[2]
Bistro orbits the Sun in theinner main-belt at a distance of 2.2–2.7 AU once every 3 years and 10 months (1,388 days). Its orbit has aneccentricity of 0.09 and aninclination of 15° with respect to theecliptic.[1] The asteroid'sobservation arc begins with its official discovery observation at Zimmerwald.[14]
In theSMASS classification,Bistro is a Sa-type asteroid, which transitions from the commonS-types to theA-type asteroids.[1]
In April 2013, a rotationallightcurve ofBistro was obtained from photometric observations at theBassano Bresciano Observatory in Italy. Lightcurve analysis gave arotation period of 17.051 hours with a brightness variation of 0.12magnitude (U=2-).[12]
The results supersede three previously published results from fragmentary lightcurves that gave a much shorter period between 7.88 and 8 hours (U=1/1/1).[10][11][a]
According to the surveys carried out by the JapaneseAkari satellite and NASA'sWide-field Infrared Survey Explorer with its subsequentNEOWISE mission,Bistro measures between 10.55 and 13.52 kilometers in diameter and its surface has analbedo between 0.1342 and 0.25.[4][5][6][7][8][9]
TheCollaborative Asteroid Lightcurve Link derives an albedo of 0.1739 and a diameter of 12.69 kilometers based on anabsolute magnitude of 12.0.[3]
Thisminor planet was namedBistro, the small type of restaurant that originated from Paris. As with the precedingly numbered2037 Tripaxeptalis, the name may also alludes to a numbers game, this time to1019 Strackea, as(2038) = 2 × (1019) Strackea.[2] The approved naming citation was published by theMinor Planet Center on 1 June 1980 (M.P.C. 5359).[15]
