词条 | 11264 Claudiomaccone |
释义 |
| minorplanet = yes | name = 11264 Claudiomaccone | background = #D6D6D6 | image = | image_size = | caption = | discovery_ref = | discovered = 16 October 1979 | discoverer = N. Chernykh | discovery_site = {{nowrap|Crimean Astrophysical Obs.}} | mpc_name = 11264 Claudiomaccone | alt_names = {{mp|1979 UC|4}}{{·}}{{mp|1989 EC|10}} {{mp|1991 PD|14}} | pronounced = | named_after = Claudio Maccone {{small|(Italian astronomer)}}[2] | mp_category = main-belt{{·}}{{small|((central))}} background | orbit_ref = | epoch = 4 September 2017 (JD 2458000.5) | uncertainty = 0 | observation_arc = 66.27 yr (24,204 days) | aphelion = 3.1793 AU | perihelion = 1.9775 AU | semimajor = 2.5784 AU | eccentricity = 0.2331 | period = 4.14 yr (1,512 days) | mean_anomaly = 21.409° | mean_motion = {{Deg2DMS|0.2381|sup=ms}} / day | inclination = 3.5229° | asc_node = 11.129° | arg_peri = 57.936° | satellites = 1[4][5][6] | dimensions = {{val|3.203|0.295}} km[7][8] 4.30 km {{small|(calculated)}}[4] | rotation = {{val|3.18701|0.00005}} h[10] {{val|3.1872|0.0006}} h[6] {{val|3.1872}} h[12] {{val|3.1873|0.0001}} h[10] | albedo = 0.20 {{small|(assumed)}}[4] {{val|0.432|0.094}}[7][8] | spectral_type = V–R = {{val|0.520|0.035}}[5][6] S [4]{{·}}S/Q [6] | abs_magnitude = 14.0[7]{{·}}14.2[4]{{·}}14.3[6]{{·}}{{val|14.44|0.25}}[25] }}11264 Claudiomaccone, provisional designation {{mp|1979 UC|4}}, is a stony background asteroid and binary system from the middle regions of the asteroid belt, approximately 3 kilometers in diameter. It was discovered 16 October 1979, by Nikolai Chernykh at Crimean Astrophysical Observatory in Nauchnyj, on the Crimean peninsula.[26] It was named after the Italian astronomer Claudio Maccone.[2] Orbit and classificationClaudiomaccone orbits the Sun in the (central) main-belt at a distance of 2.0–3.2 AU once every 4 years and 2 months (1,512 days). Its orbit has an eccentricity of 0.23 and an inclination of 4° with respect to the ecliptic. Claudiomaccone comes closer to Mars than to the other planets, repeatedly approaching the Red Planet as close as {{convert|0.47|AU|km|abbr=on|lk=off|sigfig=3}}. In 2096 it makes a very rare approach to 65 Gm.{{citation needed|date=April 2017}} A first precovery was taken at Palomar Observatory in 1950, extending the body's observation arc by 29 years prior to its official discovery observation.[26] Physical characteristicsDiameter and albedoAccording to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Claudiomaccone measures 3.203 kilometers in diameter and its surface has a high albedo of 0.432,[7][8] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony S-type asteroids of 0.20 and calculates a diameter of 4.30 kilometers with an absolute magnitude of 14.2.[4] PhotometryIn November 2004, a rotational lightcurve of Claudiomaccone was obtained from photometric observations by Ukrainian astronomer Yurij N. Krugly, using the 0.7-meter telescope at Chuguev Observation Station ({{small|121}}) and the 1-meter telescope at Simeiz Observatory. Lightcurve analysis gave a rotation period of 3.1872 hours with a brightness amplitude of 0.15 magnitude ({{small|U=n.a.}}).[6] An identical period with an amplitude of 0.12 magnitude, was also published by Petr Pravec in 2006.[12] After the binary nature of Claudiomaccone was announced (see below), follow-up observations by a group of French, Swiss and Italian astronomers (including Claudio Maccone) in 2008 and 2012, gave a period 3.1873 and 3.18701 hours with an amplitude of 0.16 and 0.12 magnitude, respectively ({{small|U=2/2+}}).[10] MoonThe obtained photometric observations from 2004, also revealed that Claudiomaccone is an asynchronous binary system with a minor-planet moon orbiting it every 15.11 hours.[6] An identical orbital period is also given by Pravec.[12] The discovery was announced in December 2005, and the moon was provisionally designated {{mp|S/2003 (11264) 1}}.[5] Based on a secondary to primary mean-diameter ratio of larger than 0.31, the moon's diameter is estimated to be at least 1.24 kilometers. Its orbit around Claudiomaccone has an estimated semi-major axis of 6 kilometers.[5][6] NamingThis minor planet was named after Claudio Maccone (born 1948), an Italian SETI astronomer and space scientist at Thales Alenia Space in Turin, Italy. In his book The Sun as a Gravitational Lens: Proposed Space Missions he proposed the construction and launch of a spacecraft–antenna, called the FOCAL space mission. Outside the Solar System, at a distance of 550 AU, FOCAL could have a significantly better sensitivity detecting radio signals due to the Sun's magnifying gravitational lensing effect, as predicted by general relativity.[2] The official naming citation was published on 2 September 2001 ({{small|M.P.C. {{MoMP|11264|43382; 54279 and *35557}}}}).[42] In 2012, he succeed American astronomer Seth Shostak as chairman of the SETI Permanent Committee at the International Academy of Astronautics. References1. ^1 2 3 {{cite book |title = Dictionary of Minor Planet Names – (11264) Claudiomaccone, Addendum to Fifth Edition: 2003–2005 |last = Schmadel | first = Lutz D. |publisher = Springer Berlin Heidelberg |page = 61 |date = 2006 |isbn = 978-3-540-34361-5 |doi = 10.1007/978-3-540-34361-5_551 |chapter = (11264) Claudiomaccone [2.58, 0.23, 3.5] }} [1][2][3][4][5][6][7][8][9][10][11]2. ^1 2 {{cite web |title = 11264 Claudiomaccone (1979 UC4) |work = Minor Planet Center |url = http://www.minorplanetcenter.net/db_search/show_object?object_id=11264 |accessdate = 12 April 2017}} 3. ^1 {{cite web |title = MPC/MPO/MPS Archive |work = Minor Planet Center |url = http://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html |accessdate = 12 April 2017}} 4. ^1 2 3 {{cite web |title = Asteroids and comets rotation curves – (11264) Claudiomaccone |last = Behrend |first = Raoul |publisher = Geneva Observatory |url = http://obswww.unige.ch/~behrend/page5cou.html#011264 |accessdate = 12 April 2017}} 5. ^1 2 3 4 {{cite web |first1 = Robert |last1 = Johnston |title = (11264) Claudiomaccone |publisher = johnstonsarchive.net |date = 21 September 2014 |url = http://www.johnstonsarchive.net/astro/astmoons/am-11264.html |accessdate = 12 April 2017}} 6. ^1 2 3 {{cite journal |display-authors = 6 |first1 = Joseph R. |last1 = Masiero |first2 = A. 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6 : Background asteroids|Discoveries by Nikolai Chernykh|Minor planets named for people|Named minor planets|Binary asteroids|Astronomical objects discovered in 1979 |
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