词条 | 1389 Onnie |
释义 |
| minorplanet = yes | name = 1389 Onnie | background = #D6D6D6 | image = | caption = {{longitem|Light-curve-based 3D-model of Onnie|style=padding: 5px 0; line-height: 1.3em;}} | discovery_ref = | discovered = 28 September 1935 | discoverer = H. van Gent | discovery_site = Johannesburg Obs. {{small|(Leiden Southern Station)}} | mpc_name = (1389) Onnie | alt_names = {{mp|1935 SS|1}}{{·}}{{mp|1949 QV|1}} {{mp|1955 XB|1}} | named_after = A. Kruyt {{small|(relative of G. Pels)}}[2] | mp_category = main-belt{{·}}Koronis [3] | orbit_ref = | epoch = 16 February 2017 (JD 2457800.5) | uncertainty = 0 | observation_arc = 80.87 yr (29,539 days) | aphelion = 2.9118 AU | perihelion = 2.8183 AU | semimajor = 2.8650 AU | eccentricity = 0.0163 | period = 4.85 yr (1,771 days) | mean_anomaly = 183.28° | mean_motion = {{Deg2DMS|0.2032|sup=ms}} / day | inclination = 2.0480° | asc_node = 174.57° | arg_peri = 297.53° | dimensions = 12.46 km {{small|(derived)}}[3] {{val|13.772|0.184}} km[6] {{val|14.737|0.159}} km[7] | rotation = {{val|22.5}} h[8] {{val|23.0447|0.0005}} h[9] | albedo = {{val|0.1734|0.0387}}[7] {{val|0.198|0.016}}[6] 0.24 {{small|(assumed)}}[3] | spectral_type = B–V = 0.810 LS [14]{{·}}S [3][8] | abs_magnitude = 11.64{{·}}11.69[3][7][8]{{·}}{{val|11.74|0.40}}[14] }}1389 Onnie, provisional designation {{mp|1935 SS|1}}, is a stony Koronian asteroid from the outer region of the asteroid belt, approximately 13 kilometers in diameter. It was discovered on 28 September 1935, by Dutch astronomer Hendrik van Gent at Leiden Southern Station, annex to the Johannesburg Observatory in South Africa.[22] Orbit and classificationThe stony S-type asteroid belongs to the Koronis family, a group consisting of few hundred known bodies with nearly ecliptical orbits. Onnie orbits the Sun at a distance of 2.8–2.9 AU once every 4 years and 10 months (1,771 days). Its orbit has an eccentricity of 0.02 and an inclination of 2° with respect to the ecliptic. As no precoveries were taken, and no prior identifications were made, the body's observation arc begins with its official discovery observation at Johannesburg.[22] LightcurveAmerican astronomer Richard P. Binzel obtained a rotational light-curve of Onnie from photometric observations in September 1983. It gave a longer-than average rotation period of 22.5 hours with a change in brightness of 0.34 magnitude ({{small|U=2}}). In 2011 and 2013, respectively, a modeled light-curve using data from the Uppsala Asteroid Photometric Catalogue and other sources gave a period 23.0447 hours, as well as a spin axis of (183.0°, -75.0°) in ecliptic coordinates ({{small|U=n.a.}}).[9][26] Diameter and albedoAccording to the 2014-published result by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Onnie measures 13.77 kilometers in diameter, and its surface has an albedo of 0.198.[6] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony Koronian asteroids of 0.24 and derives a diameter of 12.46 kilometers based on an absolute magnitude of 11.69.[3] NamingThis minor planet was named for A. Kruyt, sister-in-law of astronomer G. Pels (1893–1966). Pels, who proposed the minor planet's name, was as a lifelong member of the Leiden Observatory's staff, observer of minor planets at Leiden, as well as an orbit computer for many of Hendrik van Gent's made discoveries.[2] The minor planet 1667 Pels was named in his honour.[30] References1. ^1 2 {{cite book |title = Dictionary of Minor Planet Names – (1389) Onnie |last = Schmadel | first = Lutz D. |publisher = Springer Berlin Heidelberg |page = 112 |date = 2007 |isbn = 978-3-540-00238-3 |doi = 10.1007/978-3-540-29925-7_1390 |chapter = (1389) Onnie }} [1][2][3][4][5][6][7][8][9][10]2. ^1 {{cite book |title = Dictionary of Minor Planet Names – (1667) Pels |last = Schmadel | first = Lutz D. |publisher = Springer Berlin Heidelberg |page = 132 |date = 2007 |isbn = 978-3-540-00238-3 |doi = 10.1007/978-3-540-29925-7_1668 |chapter = (1667) Pels }} 3. ^1 2 {{cite web |title = 1389 Onnie (1935 SS1) |work = Minor Planet Center |url = http://www.minorplanetcenter.net/db_search/show_object?object_id=1389 |accessdate = 11 January 2017}} 4. ^1 2 3 {{cite journal |display-authors = 6 |first1 = Joseph R. |last1 = Masiero |first2 = T. |last2 = Grav |first3 = A. K. |last3 = Mainzer |first4 = C. R. |last4 = Nugent |first5 = J. M. |last5 = Bauer |first6 = R. |last6 = Stevenson |first7 = S. |last7 = Sonnett |date = August 2014 |title = Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2014ApJ...791..121M |journal = The Astrophysical Journal |volume = 791 |issue = 2 |page = 11 |bibcode = 2014ApJ...791..121M |doi = 10.1088/0004-637X/791/2/121 |arxiv = 1406.6645 |access-date= 11 January 2017}} 5. ^1 2 3 4 5 6 {{cite web |title = LCDB Data for (1389) Onnie |publisher = Asteroid Lightcurve Database (LCDB) |url = http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=1389%7COnnie |accessdate = 11 January 2017}} 6. ^1 2 3 {{cite journal |display-authors = 6 |first1 = A. |last1 = Mainzer |first2 = T. |last2 = Grav |first3 = J. |last3 = Masiero |first4 = E. |last4 = Hand |first5 = J. |last5 = Bauer |first6 = D. |last6 = Tholen |first7 = R. 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5 : Koronis asteroids|Discoveries by Hendrik van Gent|Minor planets named for people|Named minor planets|Astronomical objects discovered in 1935 |
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