| Discovery[1] | |
|---|---|
| Discovered by | B. Jekhovsky |
| Discovery site | Algiers Obs. |
| Discovery date | 15 June 1925 |
| Designations | |
| (1093) Freda | |
Named after | Fred Prévost (French engineer)[2] |
| 1925 LA · A898 VE | |
| main-belt · (outer)[3] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 88.15 yr (32,198 days) |
| Aphelion | 3.9776AU |
| Perihelion | 2.2809 AU |
| 3.1293 AU | |
| Eccentricity | 0.2711 |
| 5.54yr (2,022 days) | |
| 175.72° | |
| 0° 10m 41.16s / day | |
| Inclination | 25.215° |
| 55.635° | |
| 251.42° | |
| Physical characteristics | |
| Dimensions | 88.01±27.85 km[4] 101.67±1.45 km[5] 116.73±2.9 km[6] 126.04±43.76 km[7] |
| 10.73±0.05h[8] 10.73±0.05 h[8] 19.67±0.01 h[9][a] 19.701±0.0148 h[10] | |
| 0.03±0.02[7] 0.0381±0.002[6] 0.051±0.002[5] 0.06±0.05[4] | |
| Tholen =C[1][3] B–V = 0.679[1] U–B = 0.356[1] | |
| 8.49±0.42[11] · 8.83[1][3][5][6][7] · 8.88[4] · 8.882±0.001(R)[10] | |
1093 Freda, provisional designation1925 LA, is a carbonaceousasteroid from the outer regions of theasteroid belt'sbackground population, approximately 110 kilometers in diameter. It was discovered on 15 June 1925, by astronomerBenjamin Jekhowsky at theAlgiers Observatory in Algeria, North Africa.[12] The asteroid was named after French engineerFred Prévost.[2]
Freda is a non-family asteroid of the main belt'sbackground population. It orbits the Sun in theouter main-belt at a distance of 2.3–4.0 AU once every 5 years and 6 months (2,022 days). Its orbit has aneccentricity of 0.27 and aninclination of 25° with respect to theecliptic.[1]
In November 1998, the asteroid was first identified asA898 VE at theBoyden Station of the Harvard Observatory in Peru. The body'sobservation arc begins atYerkes Observatory in February 1929, almost four years after its official discovery observation at Algiers.[12]
In theTholen classification,Freda is a common carbonaceousC-type asteroid.[1][3]
Several rotationallightcurves ofFreda were obtained from photometric observations byBrian Warner, Federico Manzini, and at thePalomar Transient Factory since 2007.[8][9][10] Best-rated lightcurve analysis gave arotation period of 19.67 hours with a brightness amplitude of 0.21magnitude (U=3).[9][a]
According to the surveys carried out by the Infrared Astronomical SatelliteIRAS, the JapaneseAkari satellite and theNEOWISE mission of NASA'sWide-field Infrared Survey Explorer,Freda measures between 88.01 and 126.04 kilometers in diameter and its surface has analbedo between 0.03 and 0.06.[4][5][6][7]
TheCollaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is, an albedo of 0.0381 and a diameter of 116.73 kilometers based on anabsolute magnitude of 8.83.[3]
Thisminor planet was named after Fred Prévost, a French civil engineer of mines and benefactor of the Faculty of sciences of Bordeaux. The official naming citation was mentioned inThe Names of the Minor Planets byPaul Herget in 1955 (H 103).[2]
