| Discovery[1] | |
|---|---|
| Discovered by | M. Laugier |
| Discovery site | Nice Obs. |
| Discovery date | 30 December 1937 |
| Designations | |
| (1461) Jean-Jacques | |
Named after | Jean-Jacques Laugier (son of discoverer)[2] |
| 1937 YL · 1935 OH 1939 GH | |
| main-belt · (outer)[3] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 81.92 yr (29,921 days) |
| Aphelion | 3.2752AU |
| Perihelion | 2.9749 AU |
| 3.1250 AU | |
| Eccentricity | 0.0480 |
| 5.52yr (2,018 days) | |
| 183.52° | |
| 0° 10m 42.24s / day | |
| Inclination | 15.314° |
| 104.64° | |
| 335.41° | |
| Physical characteristics | |
| Dimensions | 25.33±1.04 km[4] 32.94±1.4 km(IRAS:8)[5] 33.75±1.40 km[6] 35.145±0.172[7] 41.431±0.464 km[8] |
| 16.56±0.01h[9] | |
| 0.1022±0.0095[8] 0.1613±0.014(IRAS:8)[5] 0.168±0.017[6] 0.172±0.030[7] 0.273±0.043[4] | |
| Tholen = M[1] · X[10] · M[3] B–V = 0.715[1] U–B = 0.210[1] | |
| 9.97±0.33[10] · 10.01[1][3][4][5][6][8] | |
1461 Jean-Jacques, provisional designation1937 YL, is a metallicasteroid from the outer region of theasteroid belt, approximately 34 kilometers in diameter. It was discovered on 30 December 1937, by French astronomerMarguerite Laugier atNice Observatory in southern France, who named it after her son Jean-Jacques Laugier.[11]
Jean-Jacques orbits the Sun in theouter main-belt at a distance of 3.0–3.3 AU once every 5 years and 6 months (2,018 days). Its orbit has aneccentricity of 0.05 and aninclination of 15° with respect to theecliptic.[1] The asteroid was first identified as1935 OH atJohannesburg Observatory in 1935, extending the body'sobservation arc by 2 years prior to its official discovery observation.[11]
In theTholen classification,Jean-Jacques is a metallicM-type asteroid.[1]
In March 2005, a rotationallightcurve ofJean-Jacques was obtained from photometric observations byLaurent Bernasconi and Horacio Correia. Lightcurve analysis gave arotation period of 16.56 hours with a brightness variation of 0.09 inmagnitude (U=2).[9]
According to the surveys carried out by the Infrared Astronomical SatelliteIRAS, the JapaneseAkari satellite, and NASA'sWide-field Infrared Survey Explorer with its subsequentNEOWISE mission,Jean-Jacques measures between 25.33 and 41.43 kilometers in diameter and its surface has analbedo between 0.102 and 0.273.[5][6][7]
TheCollaborative Asteroid Lightcurve Link adopts the results from IRAS, that is an albedo of 0.161 and a diameter of 32.94 kilometers with anabsolute magnitude of 10.01.[3]
Thisminor planet was named after Jean-Jacques Laugier, the son of the discoverer.[2] The officialnaming citation was published by theMinor Planet Center on 31 January 1962 (M.P.C. 2116).[12]
