4525 Johnbauer

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]

4525 Johnbauer
Discovery [1]
Discovered byE. F. Helin
E. Shoemaker
P. D. Wilder
Discovery sitePalomar Obs.
Discovery date15 May 1982
Designations
(4525) Johnbauer
Named after
John Bauer
(San Diego City College)[2]
1982 JB3 · 1951 YF
1988 XX
main-belt · (middle)
Mitidika [3]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc60.94 yr (22,260 days)
Aphelion3.0906 AU
Perihelion2.0552 AU
2.5729 AU
Eccentricity0.2012
4.13 yr (1,507 days)
308.59°
0° 14m 19.68s / day
Inclination13.529°
72.981°
30.621°
Physical characteristics
Dimensions10.118±0.050 km[4]
0.034±0.005[4]
13.5[1]

    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. "JPL Small-Body Database Browser: 4525 Johnbauer (1982 JB3)" (2016-10-26 last obs.). Jet Propulsion Laboratory. Retrieved 2 September 2017.
    2. "4525 Johnbauer (1982 JB3)". Minor Planet Center. Retrieved 2 September 2017.
    3. "Asteroid 4525 Johnbauer – Nesvorny HCM Asteroid Families V3.0". Small Bodies Data Ferret. Retrieved 27 October 2019.
    4. 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.
    5. Nesvorný, D.; Broz, M.; Carruba, V. (December 2014). Identification and Dynamical Properties of Asteroid Families. Asteroids IV. pp. 297–321. arXiv:1502.01628. Bibcode:2015aste.book..297N. doi:10.2458/azu_uapress_9780816532131-ch016. ISBN 9780816532131.
    6. "LCDB Data for (4525) Johnbauer". Asteroid Lightcurve Database (LCDB). Retrieved 2 September 2017.
    7. "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 2 September 2017.

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