5656_Oldfield
5656 Oldfield
Asteroid
5656 Oldfield, provisional designation A920 TA, is a background asteroid from the inner regions of the asteroid belt, approximately 7.7 kilometers (4.8 miles) in diameter. It was discovered on 8 October 1920, by astronomer Walter Baade at the Bergedorf Observatory in Hamburg, Germany. The asteroid was named for English musician Mike Oldfield.[1]
| Discovery [1] | |
|---|---|
| Discovered by | W. Baade |
| Discovery site | Bergedorf Obs. |
| Discovery date | 8 October 1920 |
| Designations | |
| (5656) Oldfield | |
Named after | Mike Oldfield [1] (English musician) |
| A920 TA · 1978 WW18 1981 JZ5 | |
| main-belt [1][2] · (inner) background [3] | |
| Orbital characteristics [2] | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 97.29 yr (35,536 d) |
| Aphelion | 3.1076 AU |
| Perihelion | 1.8111 AU |
| 2.4594 AU | |
| Eccentricity | 0.2636 |
| 3.86 yr (1,409 d) | |
| 125.66° | |
| 0° 15m 19.8s / day | |
| Inclination | 4.0144° |
| 248.67° | |
| 83.725° | |
| Physical characteristics | |
Mean diameter | 7.691±0.051 km[4] |
| 0.075±0.009[4] | |
| 14.1[2] | |
Oldfield is a non-family asteroid of the main belt's background population.[3] It orbits the Sun in the inner main-belt at a distance of 1.8–3.1 AU once every 3 years and 10 months (1,409 days; semi-major axis of 2.46 AU). Its orbit has an eccentricity of 0.26 and an inclination of 4° with respect to the ecliptic.[2]
The body's observation arc begins at Bergedorf two nights after its official discovery observation.[1]
Diameter and albedo
According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Oldfield measures 7.691 kilometers in diameter and its surface has an albedo of 0.075.[4]
Rotation period
As of 2018, no rotational lightcurve of Oldfield has been obtained from photometric observations. The body's rotation period, poles and shape remain unknown.[2]
This minor planet was named after English composer and multi-instrumentalist Mike Oldfield (born 1953), creator of the famed Tubular Bells albums.[1] The official naming citation was proposed by Gareth V. Williams and published by the Minor Planet Center on 25 April 1994 (M.P.C. 23353).[5]
- "5656 Oldfield (A920 TA)". Minor Planet Center. Retrieved 10 April 2018.
- "JPL Small-Body Database Browser: 5656 Oldfield (A920 TA)" (2018-01-23 last obs.). Jet Propulsion Laboratory. Retrieved 10 April 2018.
- "Asteroid 5656 Oldfield – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 29 October 2019.
- Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Dailey, J.; et al. (November 2011). "Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters". The Astrophysical Journal. 741 (2): 20. arXiv:1109.4096. Bibcode:2011ApJ...741...68M. doi:10.1088/0004-637X/741/2/68. Retrieved 10 April 2018.
- "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 10 April 2018.
- Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
- Dictionary of Minor Planet Names, Google books
- Discovery Circumstances: Numbered Minor Planets (5001)-(10000) – Minor Planet Center
- 5656 Oldfield at AstDyS-2, Asteroids—Dynamic Site
- 5656 Oldfield at the JPL Small-Body Database
