| Discovery[1] | |
|---|---|
| Discovered by | H. E. Holt |
| Discovery site | Palomar Obs. |
| Discovery date | 15 September 1990 |
| Designations | |
| (5185) Alerossi | |
Named after | Alessandro Rossi (Italiangeodesist)[2] |
| 1990 RV2 · 1933 SE 1955 SM · 1981 RA1 1984 HG · 1986 UR4 1988 FQ3 | |
| main-belt[1][3] · (middle) background[4][5] | |
| Orbital characteristics[3] | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 84.34yr (30,804 d) |
| Aphelion | 2.8993AU |
| Perihelion | 2.4533 AU |
| 2.6763 AU | |
| Eccentricity | 0.0833 |
| 4.38 yr (1,599 d) | |
| 34.812° | |
| 0° 13m 30.36s / day | |
| Inclination | 8.3787° |
| 216.42° | |
| 216.46° | |
| Physical characteristics | |
| 12.86±1.2 km[6][4] 13.36±0.12 km[7] | |
| 0.081±0.009[7] 0.1408±0.031[6] | |
| 12.6[1][3] | |
5185 Alerossi (provisional designation1990 RV2) is a backgroundasteroid from the central region of theasteroid belt, approximately 13 miles (21 kilometers) in diameter. It was discovered on 15 September 1990, by American astronomerHenry Holt atPalomar Observatory in California, United States.[1] The asteroid was later named for Italian geodesistAlessandro Rossi.[2]
Alerossi is a non-family asteroid from the main belt'sbackground population.[4][5] It orbits the Sun in thecentral asteroid belt at a distance of 2.5–2.9 AU once every 4 years and 5 months (1,599 days;semi-major axis of 2.68 AU). Its orbit has aneccentricity of 0.08 and aninclination of 8° with respect to theecliptic.[3]
In 1933, it was first observed as1933 SE atUccle Observatory, extending the body'sobservation arc by 57 years prior to its official discovery observation at Palomar.[1]
Thisminor planet was named after Italian geodesists Alessandro Rossi (born 1964), a member of the "Group of Satellite Flight Dynamics" at the Istituto CNECE in Pisa, Italy. Expert in spacegeodesy and participant in theLaser Geodynamics Satellites (LAGEOS) mission, he examines Earth's artificialorbital debris, the natural debris around mission targets to improve space-craft maneuvers, and the potential hazard ofEarth-crossers.[2] The official naming citation was published by theMinor Planet Center on 28 July 1999 (M.P.C. 61268).[8]
According to the surveys carried out by the Infrared Astronomical SatelliteIRAS and NASA'sWide-field Infrared Survey Explorer with its subsequentNEOWISE mission, Alerossi measures 12.9 and 13.3 kilometers in diameter and its surface has analbedo of 0.08 and 0.14, respectively.[6][7] It has an absolute magnitude of 12.6.[1][3] As of 2018, the asteroid'sspectral type,rotation period and shape remain unknown.[3][9]
