| Discovery[1] | |
|---|---|
| Discovered by | B. A. Skiff |
| Discovery site | Anderson Mesa Stn. |
| Discovery date | 9 March 1984 |
| Designations | |
| (4149) Harrison | |
Named after | George Harrison (guitarist,The Beatles)[2] |
| 1984 EZ | |
| main-belt · Eunomia[3] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 39.32 yr (14,360 days) |
| Aphelion | 2.9955AU |
| Perihelion | 2.3356 AU |
| 2.6655 AU | |
| Eccentricity | 0.1238 |
| 4.35yr (1,590 days) | |
| 204.95° | |
| 0° 13m 35.4s / day | |
| Inclination | 12.923° |
| 154.73° | |
| 76.653° | |
| Physical characteristics | |
| Dimensions | 8.14 km(derived)[3] 10.130±0.081[4] 10.739±0.042 km[5] |
| 3.7490±0.0002h[a] 3.956±0.001 h[6] | |
| 0.1856±0.0479[5] 0.21(assumed)[3] 0.230±0.035[4] | |
| S[3] | |
| 12.3[1][5] · 12.31±0.16(R)[a] · 12.54±0.22[7] · 12.76[3] | |
4149 Harrison, provisional designation1984 EZ, is a stony Eunomianasteroid from the middle region of theasteroid belt, approximately 10 kilometers in diameter. The asteroid was discovered on 9 March 1984, by American astronomerBrian Skiff at Lowell'sAnderson Mesa Station in Flagstaff, Arizona, and named after musicianGeorge Harrison.[8]
Harrison is a member of theEunomia family, a large group ofS-type asteroids and the most prominent family in the intermediate main-belt. It orbits the Sun in thecentral main-belt at a distance of 2.3–3.0 AU once every 4 years and 4 months (1,590 days). Its orbit has aneccentricity of 0.12 and aninclination of 13° with respect to theecliptic.[1] A firstprecovery was taken atPalomar Observatory in 1977, extending the body'sobservation arc by 7 years prior to its discovery.[8]
A rotationallightcurve ofHarrison was obtained from photometric observations by Czech astronomerPetr Pravec atOndřejov Observatory in May 2015. It gave a well-definedrotation period of3.7490±0.0002 hours with a brightness variation of 0.42 inmagnitude (U=3).[a] During the following month, photometric observations at three Italian observatories gave a second lightcurve with a period of3.956±0.001 hours and an amplitude of 0.37 in magnitude (U=2+).[6]
According to the survey carried out by theNEOWISE mission of NASA'sWide-field Infrared Survey Explorer,Harrison measures 10.1 and 10.7 kilometers in diameter and its surface has analbedo of 0.19 and 0.23, respectively,[4][5] while theCollaborative Asteroid Lightcurve Link assumes an albedo of 0.21 – derived from15 Eunomia, the family's largest member and namesake – and calculates a diameter of 8.1 kilometers with anabsolute magnitude of 12.76.[3]
Thisminor planet was named in honor of guitarist, singer and songwriter,George Harrison (1943–2001), who was the lead guitarist of the English rock bandThe Beatles, after which the main-belt asteroid8749 Beatles is named.[2] The minor planets4147 Lennon,4148 McCartney and4150 Starr honor the other three members of the band. The official naming citation was published by theMinor Planet Center on 10 April 1990 (M.P.C. 16248).[9]
