| 词条 | 1205 Ebella |
| 释义 |
| minorplanet = yes | name = 1205 Ebella | background = #D6D6D6 | image = | image_size = | caption = | discovery_ref = | discovered = 6 October 1931 | discoverer = K. Reinmuth | discovery_site = Heidelberg Obs. | mpc_name = (1205) Ebella | alt_names = {{mp|1931 TB|1}}{{·}}1970 JT | pronounced = | named_after = Martin Ebell {{small|(German astronomer)}}[2] | mp_category = main-belt{{·}}{{small|(middle)}} | orbit_ref = | epoch = 4 September 2017 (JD 2458000.5) | uncertainty = 0 | observation_arc = 85.48 yr (31,221 days) | aphelion = 3.2287 AU | perihelion = 1.8411 AU | semimajor = 2.5349 AU | eccentricity = 0.2737 | period = 4.04 yr (1,474 days) | mean_anomaly = 103.87° | mean_motion = {{Deg2DMS|0.2442|sup=ms}} / day | inclination = 8.8616° | asc_node = 23.083° | arg_peri = 349.24° | dimensions = {{val|5.474|0.283}} km[4] 6.0 km {{small|(est. at 0.20)}}[5] | rotation = | albedo = {{val|0.214|0.026}}[4] | spectral_type = | abs_magnitude = 13.5 }}1205 Ebella, provisional designation {{mp|1931 TB|1}}, is a relatively eccentric asteroid from the central regions of the asteroid belt, approximately 5.5 kilometers in diameter. It was discovered by astronomer Karl Reinmuth at Heidelberg Observatory on 6 October 1931. The asteroid was named after German astronomer Martin Ebell.[8] Orbit and classificationEbella orbits the Sun in the central main-belt at a distance of 1.8–3.2 AU once every 4.04 years (1,474 days). Its orbit has an eccentricity of 0.27 and an inclination of 9° with respect to the ecliptic. As no precoveries were taken and no prior identifications were made, the asteroid's observation arc begins at Heidelberg with its official discovery observation.[8]Physical characteristicsDiameter and albedoAccording to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Ebella measures 5.474 kilometers in diameter and its surface has an albedo of 0.214, which is typical for stony S-type asteroids.[4] Based on a generic magnitude-to-diameter conversion, it measures 6.0 kilometers in diameter using an absolute magnitude of 13.50 with an assumed albedo of 0.20.[5] LightcurveAs of 2017, no rotational lightcurve of Ebella has been obtained from photometric observations. The asteroid's rotation period, poles and shape still remain unknown.[14] NamingThis minor planet was named after Carl Wilhelm Ludwig Martin Ebell (1871–1944) an astronomer from Kiel, Germany, who was on the editorial team of the renowned astronomical journal Astronomische Nachrichten. The official naming citation was published by Paul Herget in The Names of the Minor Planets in 1955 ({{small|H 112}}).[2] References1. ^1 2 {{cite book |title = Dictionary of Minor Planet Names – (1205) Ebella |last = Schmadel | first = Lutz D. |publisher = Springer Berlin Heidelberg |page = 101 |date = 2007 |isbn = 978-3-540-00238-3 |doi = 10.1007/978-3-540-29925-7_1206 |chapter = (1205) Ebella }} [1][2][3][4][5]2. ^1 2 {{cite web |title = 1205 Ebella (1931 TB1) |work = Minor Planet Center |url = http://www.minorplanetcenter.net/db_search/show_object?object_id=1205 |accessdate = 5 August 2017}} 3. ^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= 5 August 2017}} 4. ^1 2 {{cite web |title = Asteroid Size Estimator |publisher = CNEOS/JPL |url = https://cneos.jpl.nasa.gov/tools/ast_size_est.html |access-date= 5 August 2017}} 5. ^1 {{cite web |title = LCDB Data for (1205) Ebella |publisher = Asteroid Lightcurve Database (LCDB) |url = http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=1205%7CEbella |accessdate = 5 August 2017}} }} External links
5 : Background asteroids|Discoveries by Karl Wilhelm Reinmuth|Minor planets named for people|Named minor planets|Astronomical objects discovered in 1931 |
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