Astronomy:4525 Johnbauer
| Discovery [1] | |
|---|---|
| Discovered by | E. F. Helin E. Shoemaker P. D. Wilder |
| Discovery site | Palomar Obs. |
| Discovery date | 15 May 1982 |
| Designations | |
| (4525) Johnbauer | |
| Named after | John Bauer (San Diego City College)[2] |
| 1982 JB3 · 1951 YF 1988 XX | |
| Minor planet category | main-belt · (middle) Mitidika [3] |
| Orbital characteristics [1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 60.94 yr (22,260 days) |
| |{{{apsis}}}|helion}} | 3.0906 AU |
| |{{{apsis}}}|helion}} | 2.0552 AU |
| 2.5729 AU | |
| Eccentricity | 0.2012 |
| Orbital period | 4.13 yr (1,507 days) |
| Mean anomaly | 308.59° |
| Mean motion | 0° 14m 19.68s / day |
| Inclination | 13.529° |
| Longitude of ascending node | 72.981° |
| 30.621° | |
| Physical characteristics | |
| Dimensions | 10.118±0.050 km[4] |
| Geometric albedo | 0.034±0.005[4] |
| Absolute magnitude (H) | 13.5[1] |
4525 Johnbauer, provisional designation 1982 JB3, is dark Mitidika asteroid from the central regions of the asteroid belt, approximately 10 kilometers in diameter. It was discovered on 15 May 1982, by astronomer couple Eleanor and Eugene Shoemaker, as well as Peter Wilder at the Palomar Observatory in California, United States. The asteroid was named after John Bauer, physics teacher at San Diego City College.[2]
Orbit and classification
Johnbauer has been identified as a member of the Mitidika family, a dispersed asteroid family of typically carbonaceous C-type asteroids. The family is named after 2262 Mitidika (diameter of 9 km) and consists of 653 known members, the largest ones being 404 Arsinoë (95 km) and 5079 Brubeck (17 km).[3][5]:23
It orbits the Sun in the central main-belt at a distance of 2.1–3.1 AU once every 4 years and 2 months (1,507 days). Its orbit has an eccentricity of 0.20 and an inclination of 14° with respect to the ecliptic.[1]
The asteroid was first identified as 1951 YF at the McDonald Observatory in December 1951. The body's observation arc begins more than 26 years prior to its official discovery observation, with a precovery taken at Palomar in November 1955.[2]
Physical characteristics
Rotation period
As of 2017, no rotational lightcurve of Johnbauer has been obtained from photometric observations. The body's rotation period, spin axis and shape remains unknown.[1][6]
Diameter and albedo
According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Johnbauer measures 10.118 kilometers in diameter and its surface has a low albedo of 0.034.[4]
Naming
This minor planet was named in memory of John Bauer (1932–2002), a long-time teacher of astronomy and physics at San Diego City College in San Diego, California, who over the course of forty years (1962-2002), inspired hundreds of students to pursue professional and academic careers in astronomy and physics. The name was suggested by N. Butler. The official naming citation was published by the Minor Planet Center on 13 April 2006 (M.P.C. 56611).[7]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 "JPL Small-Body Database Browser: 4525 Johnbauer (1982 JB3)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2004525.
- ↑ 2.0 2.1 2.2 "4525 Johnbauer (1982 JB3)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=4525.
- ↑ 3.0 3.1 "Asteroid 4525 Johnbauer – Nesvorny HCM Asteroid Families V3.0". Small Bodies Data Ferret. https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=4525+Johnbauer#Asteroid%204525%20JohnbauerEAR-A-VARGBDET-5-NESVORNYFAM-V3.0.
- ↑ 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.
- ↑ Nesvorný, D.; Broz, M.; Carruba, V. (December 2014). "Identification and Dynamical Properties of Asteroid Families". Asteroids IV. pp. 297–321. doi:10.2458/azu_uapress_9780816532131-ch016. ISBN 9780816532131. Bibcode: 2015aste.book..297N.
- ↑ "LCDB Data for (4525) Johnbauer". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=4525%7CJohnbauer.
- ↑ "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
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- 4525 Johnbauer at AstDyS-2, Asteroids—Dynamic Site
- 4525 Johnbauer at the JPL Small-Body Database
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