| 词条 | 4525 Johnbauer |
| 释义 |
| minorplanet = yes | name = 4525 Johnbauer | background = #D6D6D6 | image = | image_size = | caption = | discovery_ref = | discoverer = E. F. Helin E. Shoemaker P. D. Wilder | discovery_site = Palomar Obs. | discovered = 15 May 1982 | mpc_name = (4525) Johnbauer | alt_names = {{mp|1982 JB|3}}{{·}}1951 YF 1988 XX | pronounced = | named_after = John Bauer {{nowrap|{{small|(San Diego City College)}}[2]}} | mp_category = main-belt{{·}}{{small|(middle)}} Mitidika [3] | orbit_ref = | epoch = 4 September 2017 (JD 2458000.5) | uncertainty = 0 | observation_arc = 60.94 yr (22,260 days) | aphelion = 3.0906 AU | perihelion = 2.0552 AU | semimajor = 2.5729 AU | eccentricity = 0.2012 | period = 4.13 yr (1,507 days) | mean_anomaly = 308.59° | mean_motion = {{Deg2DMS|0.2388|sup=ms}} / day | inclination = 13.529° | asc_node = 72.981° | arg_peri = 30.621° | dimensions = {{val|10.118|0.050}} km[5] | rotation = | albedo = {{val|0.034|0.005}}[5] | spectral_type = | abs_magnitude = 13.5 }}4525 Johnbauer, provisional designation {{mp|1982 JB|3}}, 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 classificationJohnbauer 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][10]{{rp|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. The asteroid was first identified as {{mp|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 characteristicsRotation periodAs of 2017, no rotational lightcurve of Johnbauer has been obtained from photometric observations. The body's rotation period, spin axis and shape remains unknown.[14] Diameter and albedoAccording 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.[5] NamingThis 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 ({{small|M.P.C. 56611}}).[16] References1. ^1 2 3 {{cite web |title = 4525 Johnbauer (1982 JB3) |work = Minor Planet Center |url = http://www.minorplanetcenter.net/db_search/show_object?object_id=4525 |accessdate = 2 September 2017}} [1][2][3][4][5][6]2. ^1 {{cite web |title = MPC/MPO/MPS Archive |work = Minor Planet Center |url = http://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html |accessdate = 2 September 2017}} 3. ^1 2 {{cite web |title = Small Bodies Data Ferret |work = Nesvorny HCM Asteroid Families V3.0 |url = https://sbntools.psi.edu/ferret/PropertySearch/familyForm.action |accessdate = 2 September 2017}} 4. ^1 {{Cite journal |first1 = D. |last1 = Nesvorný |first2 = M. |last2 = Broz |first3 = V. |last3 = Carruba |date = December 2014 |title = Identification and Dynamical Properties of Asteroid Families |url = https://arxiv.org/pdf/1502.01628.pdf |journal = Asteroids IV |pages = 297–321 |bibcode = 2015aste.book..297N |doi = 10.2458/azu_uapress_9780816532131-ch016 |arxiv = 1502.01628 |access-date= 2 September 2017}} 5. ^1 2 3 {{cite journal |display-authors = 6 |first1 = Joseph R. |last1 = Masiero |first2 = A. K. |last2 = Mainzer |first3 = T. |last3 = Grav |first4 = J. M. |last4 = Bauer |first5 = R. M. |last5 = Cutri |first6 = J. |last6 = Dailey |first7 = P. R. M. |last7 = Eisenhardt |first8 = R. S. |last8 = McMillan |first9 = T. B. |last9 = Spahr |first10 = M. F. |last10 = Skrutskie |first11 = D. |last11 = Tholen |first12 = R. G. |last12 = Walker |first13 = E. L. |last13 = Wright |first14 = E. |last14 = DeBaun |first15 = D. |last15 = Elsbury |first16 = T., IV |last16 = Gautier |first17 = S. |last17 = Gomillion |first18 = A. |last18 = Wilkins |date = November 2011 |title = Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011ApJ...741...68M |journal = The Astrophysical Journal |volume = 741 |issue = 2 |page = 20 |bibcode = 2011ApJ...741...68M |doi = 10.1088/0004-637X/741/2/68 |arxiv = 1109.4096 |access-date= 2 September 2017}} 6. ^1 {{cite web |title = LCDB Data for (4525) Johnbauer |publisher = Asteroid Lightcurve Database (LCDB) |url = http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=4525%7CJohnbauer |accessdate = 2 September 2017}} }} External links
6 : Mitidika asteroids|Discoveries by Eleanor F. Helin|Discoveries by Eugene Merle Shoemaker|Minor planets named for people|Named minor planets|Astronomical objects discovered in 1982 |
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