astro.wikisort.org - Asteroid

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 by	E. F. Helin E. Shoemaker P. D. Wilder
Discovery site	Palomar Obs.
Discovery date	15 May 1982
Designations
MPC designation	(4525) Johnbauer
Named after	John Bauer (San Diego City College)[2]
Alternative designations	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)
Aphelion	3.0906 AU
Perihelion	2.0552 AU
Semi-major axis	2.5729 AU
Eccentricity	0.2012
Orbital period (sidereal)	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°
Argument of perihelion	30.621°
Physical characteristics
Dimensions	10.118±0.050 km[4]
Geometric albedo	0.034±0.005[4]
Absolute magnitude (H)	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

External links

• Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
• 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
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 4525 Johnbauer at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

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