_Pafuri.png) Modelled shape ofPafuri, from itslightcurve | |
| Discovery[1] | |
|---|---|
| Discovered by | H. E. Wood |
| Discovery site | Johannesburg Obs. |
| Discovery date | 30 May 1924 |
| Designations | |
| (1032) Pafuri | |
Named after | Pafuri Triangle/River[2] (in South Africa) |
| 1924 SA · 1937 XB 1947 SA · 1961 AQ 1965 YJ · A917 CC | |
| main-belt[1][3] · (outer)[4] background[5] | |
| Orbital characteristics[3] | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 100.95yr (36,873 d) |
| Aphelion | 3.5799AU |
| Perihelion | 2.6806 AU |
| 3.1303 AU | |
| Eccentricity | 0.1436 |
| 5.54 yr (2,023 d) | |
| 317.36° | |
| 0° 10m 40.8s / day | |
| Inclination | 9.4808° |
| 76.322° | |
| 189.23° | |
| Physical characteristics | |
| 54.61 km(derived)[4] 54.67±3.4 km[6] 62.60±0.81 km[7] 65.658±0.280 km[8] 68.74±24.54 km[9] 70.27±18.94 km[10] 75.265±0.792 km[11] | |
| 13 h(at least)[12] 24 h(at least)[13] | |
| 0.0312±0.0055[11] 0.04±0.01[10] 0.04±0.06[9] 0.042±0.009[8] 0.046±0.001[7] 0.0540(derived)[4] 0.0591±0.008[6] | |
| SMASS =X[3] · P[11] C(assumed)[4] | |
| 10.00[3][6][7][11] 10.10[4][10] · 10.17[9] 10.41±0.53[14] | |
1032 Pafuri, provisional designation1924 SA, is a darkbackground asteroid from the outer regions of theasteroid belt, approximately 65 kilometers (40 miles) in diameter. It was discovered on 30 May 1924, by English astronomerHarry Edwin Wood at theUnion Observatory in Johannesburg, South Africa.[1] The asteroid was named for the river in thePafuri Triangle in South Africa, created by the confluence of theLimpopo andLevubu rivers.[2] The body'sspectral type androtation period are still poorly determined.
Pafuri is a non-family asteroid from the main belt'sbackground population.[5] It orbits the Sun in theouter main-belt at a distance of 2.7–3.6 AU once every 5 years and 6 months (2,023 days;semi-major axis of 3.13 AU). Its orbit has aneccentricity of 0.14 and aninclination of 9° with respect to theecliptic.[3]
The asteroid was first observed asA917 CC atHeidelberg Observatory in February 1917, where the body'sobservation arc begins in April 1929, nearly 5 years after its official discovery observation at Johannesburg.[1]
Thisminor planet was named after the river in thePafuri Triangle, created by the confluence of theLimpopo andLevubu rivers in South Africa.[2] The official naming citation was mentioned inThe Names of the Minor Planets byPaul Herget in 1955 (H 98).[2]
In theSMASS classification,Pafuri is anX-type asteroid,[3] while theWide-field Infrared Survey Explorer (WISE) characterized it as a primitive and darkerP-type asteroid.[11] TheCollaborative Asteroid Lightcurve Link assumes it to be a carbonaceousC-type asteroid.[4]
In November 2009, a rotationallightcurve ofPafuri was obtained fromphotometric observations by French amateur astronomerPierre Antonini who suspects it to be aslow rotator.[13] Lightcurve analysis gave arotation period of at least 24 hours with a brightness variation of more than 0.15magnitude (U=n.a.).[13] The result supersedes a previous period of at least 13 hours at theOakley Observatory in the United States (U=n.a.).[12] As of 2018, no secure rotation period has been obtained.[4]
According to the surveys carried out by the Infrared Astronomical SatelliteIRAS, the JapaneseAkari satellite and theNEOWISE mission of NASA's WISE telescope,Pafuri measures between 54.67 and 75.265 kilometers in diameter and its surface has analbedo between 0.0312 and 0.0591.[6][7][8][9][10][11] CALL derives an albedo of 0.0540 and a diameter of 54.61 kilometers based on anabsolute magnitude of 10.1.[4]
