_Rickfienberg.png) Rickfienberg modeled from itslightcurve | |
| Discovery[1] | |
|---|---|
| Discovered by | Dennis di Cicco |
| Discovery site | Sudbury Obs. (817) |
| Discovery date | 19 February 1995 |
| Designations | |
| (9983) Rickfienberg | |
Named after | Richard Fienberg (astronomer, editor)[2] |
| 1995 DA · 1987 KS2 1993 TS37 | |
| main-belt · (middle) | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 30.02 yr (10,963 days) |
| Aphelion | 3.0191AU |
| Perihelion | 2.3962 AU |
| 2.7076 AU | |
| Eccentricity | 0.1150 |
| 4.46yr (1,627 days) | |
| 107.42° | |
| 0° 13m 16.32s / day | |
| Inclination | 8.3223° |
| 49.216° | |
| 7.2821° | |
| Physical characteristics | |
| 7.444±0.280 km[3][4] 12.18 km(calculated)[5] | |
| 5.29616±0.00001 h h[6] 5.2963±0.0001 h[7] | |
| 0.057(assumed)[5] 0.167±0.035[3][4] | |
| C(assumed)[5] | |
| 13.2[3] · 13.3[1][5] | |
9983 Rickfienberg (prov. designation:1995 DA) is a carbonaceousasteroid from the middle region of theasteroid belt, approximately 10 kilometers (6.2 miles) in diameter. It was discovered on 19 February 1995, by American astronomerDennis di Cicco at his private Sudbury Observatory (817), Massachusetts, United States.[8] It was named after American astronomer and editorRichard Fienberg.[2]
Rickfienberg is a non-family asteroid of the main belt'sbackground population when applying thehierarchical clustering method to itsproper orbital elements. The darkC-type asteroid orbits the Sun in thecentral main-belt at a distance of 2.4–3.0 AU once every 4 years and 5 months (1,627 days). Its orbit has aneccentricity of 0.12 and aninclination of 8° with respect to theecliptic.[1] The first observation was taken at the AustralianSiding Spring Observatory in 1987, extending the asteroid'sobservation arc by 8 years prior to its discovery.[8]
Thisminor planet was named for Richard Tresch Fienberg (born 1956) an American astronomer at Rice and Harvard universities, and a stargazer at his private observatory near Danbury, New Hampshire. He is also an editor of the American amateur astronomer magazineSky & Telescope, after which the minor planet3243 Skytel is named.[2] Theofficial naming citation was published by theMinor Planet Center on 1 May 2003 (M.P.C. 48389).[9]
During the asteroid's opposition in November 2011, a rotationallightcurve was obtained fromphotometric observations atKitt Peak Observatory. It gave a well-definedrotation period of5.2963 hours with a high brightness variation of 1.3 inmagnitude (U=3), typically indicating a non-spheroidal shape.[7] This period was also confirmed by remodeled data from the Lowell photometric database in March 2016.[6]
According to the survey carried out by theNEOWISE mission of NASA'sWide-field Infrared Survey Explorer,Rickfienberg measures 7.4 kilometers in diameter and its surface has analbedo of 0.17,[3][4] while theCollaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and calculates a diameter of 12.2 kilometers, as the lower the body's albedo (reflectivity), the larger its diameter, at a constant absolute magnitude (brightness).[5]
{{cite journal}}: CS1 maint: multiple names: authors list (link)