Astronomy:5656 Oldfield
| 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 | |
| Minor planet category | 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) |
| |{{{apsis}}}|helion}} | 3.1076 AU |
| |{{{apsis}}}|helion}} | 1.8111 AU |
| 2.4594 AU | |
| Eccentricity | 0.2636 |
| Orbital period | 3.86 yr (1,409 d) |
| Mean anomaly | 125.66° |
| Mean motion | 0° 15m 19.8s / day |
| Inclination | 4.0144° |
| Longitude of ascending node | 248.67° |
| 83.725° | |
| Physical characteristics | |
| Mean diameter | 7.691±0.051 km[4] |
| Geometric albedo | 0.075±0.009[4] |
| Absolute magnitude (H) | 14.1[2] |
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]
Orbit and classification
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]
Physical characteristics
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]
Naming
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]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 "5656 Oldfield (A920 TA)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=5656.
- ↑ 2.0 2.1 2.2 2.3 2.4 "JPL Small-Body Database Browser: 5656 Oldfield (A920 TA)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2005656.
- ↑ 3.0 3.1 "Asteroid 5656 Oldfield – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=5656.
- ↑ 4.0 4.1 4.2 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. doi:10.1088/0004-637X/741/2/68. Bibcode: 2011ApJ...741...68M. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011ApJ...741...68M. Retrieved 10 April 2018.
- ↑ "MPC/MPO/MPS Archive". Minor Planet Center. https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html.
External links
- Asteroid Lightcurve Database (LCDB), query form (info )
- 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
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