| Discovery[1] | |
|---|---|
| Discovered by | E. Bowell |
| Discovery site | Anderson Mesa Stn. |
| Discovery date | 1 March 1984 |
| Designations | |
| (3066) McFadden | |
Named after | Lucy-Ann McFadden[1] (American astronomer) |
| 1984 EO · 1933 MA 1936 FE · 1941 MA 1952 FW · 1968 FQ 1976 GC · 1980 EG2 | |
| main-belt[1][2] · (inner)[3] background[4] | |
| Orbital characteristics[2] | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 81.60yr (29,806 d) |
| Aphelion | 2.8636AU |
| Perihelion | 2.1875 AU |
| 2.5255 AU | |
| Eccentricity | 0.1339 |
| 4.01 yr (1,466 d) | |
| 328.54° | |
| 0° 14m 44.16s / day | |
| Inclination | 15.574° |
| 175.69° | |
| 188.31° | |
| Physical characteristics | |
| 13.526±0.046 km[5] 14.805±0.051 km[6] 14.896 km[7] 14.90 km(taken)[3] 15.27±0.53 km[8] 15.63±0.44 km[9] | |
| 13.798±0.002 h[10][a] | |
| 0.240±0.015[9] 0.2541[7] 0.2617±0.0766[6] 0.275±0.072[8] 0.363±0.033[5] | |
| S(assumed)[3] | |
| 11.10[8] · 11.20[2][9] 11.24[3][6] 11.24±0.08[7][11] 11.41±0.25[12] | |
3066 McFadden, provisional designation1984 EO, is a stony backgroundasteroid from the central regions of theasteroid belt, approximately 15 kilometers (9.3 miles) in diameter. It was discovered on 1 March 1984, by American astronomerEdward Bowell at theAnderson Mesa Station near Tucson, Arizona. It was named for American planetary scientistLucy-Ann McFadden.[1] The assumedS-type asteroid has a rotation period of 13.8 hours.[3][a]
McFadden is a non-family asteroid from the main belt'sbackground population.[4] It orbits the Sun in thecentral asteroid belt at a distance of 2.2–2.9 AU once every 4 years (1,466 days;semi-major axis of 2.53 AU). Its orbit has aneccentricity of 0.13 and aninclination of 16° with respect to theecliptic.[2]
The asteroid was first observed as1933 MA at theSimeis Observatory in June 1933. The body'sobservation arc begins as1936 FE atUccle Observatory in March 1936, or 48 years prior to its official discovery observation at Anderson Mesa.[1]
Thisminor planet was named afterLucy-Ann McFadden (born 1952), aplanetary scientist at theUniversity of Maryland at the time of naming. Her research included the similarities between the spectra ofmeteorites andnear-Earth objects.[1] The official naming citation was published by theMinor Planet Center on 14 April 1987 (M.P.C. 11748).[13]
McFadden is an assumed, stonyS-type asteroid.[3]
In June 2005, a rotationallightcurve ofMcFadden was obtained from photometric observations by American astronomerBrian Warner at hisPalmer Divide Observatory in Colorado. Lightcurve analysis gave arotation period of 13.798 hours with a brightness amplitude of 0.13magnitude (U=3).[10][a]
According to the surveys carried out by the JapaneseAkari satellite and theNEOWISE mission of NASA'sWide-field Infrared Survey Explorer,McFadden measures between 13.526 and 15.63 kilometers in diameter and its surface has analbedo between 0.240 and 0.363.[5][6][7][8][9]
TheCollaborative Asteroid Lightcurve Link adoptsPetr Pravec's revised WISE data with an albedo of 0.2541 and a diameter of 14.90 kilometers based on anabsolute magnitude of 11.24.[3][7]
