| Discovery[1] | |
|---|---|
| Discovered by | E. W. Elst |
| Discovery site | La Silla Obs. |
| Discovery date | 20 October 1993 |
| Designations | |
| (10830) Desforges | |
Named after | Jacques Desforges[1] (French priest) |
| 1993 UT6 · 1982 FS2 1984 SS7 | |
| main-belt[1][2] · (middle) background[3] · Eunomia[4] | |
| Orbital characteristics[2] | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 35.27yr (12,884 d) |
| Aphelion | 3.1271AU |
| Perihelion | 2.1944 AU |
| 2.6607 AU | |
| Eccentricity | 0.1753 |
| 4.34 yr (1,585 d) | |
| 151.24° | |
| 0° 13m 37.56s / day | |
| Inclination | 11.153° |
| 178.72° | |
| 307.82° | |
| Physical characteristics | |
| 4.21 km(calculated)[4] 7.692±2.245 km[5] 9.390±0.203 km[6][7] | |
| 8.804±0.0058 h[8] | |
| 0.0635±0.0545[5] 0.0797±0.0101[7] 0.080±0.010[6] 0.21(assumed)[4] | |
| S(assumed)[4] | |
| 13.5[7] 13.6[2] 13.739±0.008(R)[8] 14.18[5][9] 14.19[4] | |
10830 Desforges, provisional designation1993 UT6, is a background or Eunomianasteroid from the central regions of theasteroid belt, approximately 7 kilometers (4 miles) in diameter. It was discovered on 20 October 1993, by Belgian astronomerEric Elst at theLa Silla Observatory in northern Chile.[1] The likely elongatedS-type asteroid has arotation period of 8.8 hours.[4] It was named after French priest and aviation visionaryJacques Desforges.[1]
Desforges is a non-family asteroid of the main belt'sbackground population when applying thehierarchical clustering method to itsproper orbital elements.[3] Based on osculating Keplerianorbital elements, the asteroid has also been classified as a member of theEunomia family (502), a prominentfamily of stonyS-type asteroid and the largest one in the intermediate main belt with more than 5,000 members.[4]
It orbits the Sun in thecentral main-belt at a distance of 2.2–3.1 AU once every 4 years and 4 months (1,585 days;semi-major axis of 2.66 AU). Its orbit has aneccentricity of 0.18 and aninclination of 11° with respect to theecliptic.[2] The body'sobservation arc begins with its first observations as1982 FS2 atKlet Observatory in March 1982, more than 11 years prior to its official discovery observation at La Silla.[1]
Desforges is an assumed stonyS-type asteroid,[4] which is the overallspectral type for members of the Eunomia family.[10]: 23 Observations with theWide-field Infrared Survey Explorer (WISE), however, gave a lowgeometric albedo more typical for anX- orC-type asteroid(see below).
In August 2010, a rotationallightcurve ofDesforges was obtained fromphotometric observations in the R-band by astronomers at thePalomar Transient Factory in California.[8] Lightcurve analysis gave arotation period of 8.804 hours with a high brightness amplitude of 0.69magnitude, which indicates that the body has a non-spherical shape (U=2).[4]
According to the survey carried out by theNEOWISE mission of NASA's WISE telescope,Desforges measures between 7.692 and 9.390 kilometers in diameter and its surface has analbedo between 0.0635 and 0.080.[5][6][7]
TheCollaborative Asteroid Lightcurve Link assumes an albedo of 0.21 – derived from the Eunomia family's parent body,15 Eunomia – and calculates a diameter of 4.21 kilometers based on anabsolute magnitude of 14.19.[4]
Thisminor planet was named after a French priestJacques Desforges (1723–1791), who was imprisoned for eight months in 1758 in theBastille, during which time he planned the construction of a flying machine.[1] The official naming citation was published by theMinor Planet Center on 18 March 2003 (M.P.C. 48156).[11]
