词条 | 5208 Royer |
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| minorplanet = yes | name = 5208 Royer | background = #D6D6D6 | image = | image_size = | caption = | discovery_ref = [1] | discoverer = E. F. Helin | discovery_site = Palomar Obs. | discovered = 6 February 1989 | mpc_name = (5208) Royer | alt_names = {{mp|1989 CH|1}} | pronounced = | named_after = {{nowrap|Msgr Ronald E. Royer [1]}} {{small|(American priest and amateur astronomer)}} | mp_category = main-belt [1]{{·}}{{small|(middle)}} Maria [5] | orbit_ref = | epoch = 23 March 2018 (JD 2458200.5) | uncertainty = 0 | observation_arc = 64.29 yr (23,481 d) | aphelion = 2.7241 AU | perihelion = 2.4844 AU | semimajor = 2.6042 AU | eccentricity = 0.0460 | period = 4.20 yr (1,535 d) | mean_anomaly = 345.72° | mean_motion = {{Deg2DMS|0.2345|sup=ms}} / day | inclination = 15.904° | asc_node = 124.56° | arg_peri = 21.407° | mean_diameter = {{val|7.884|0.150|ul=km}}[7] {{val|8.081|0.121|u=km}}[8] 9.40 km {{small|(calculated)}}[9] | rotation = {{val|3.866|ul=h}}[10] {{val|3.88494|0.00005|u=h}}[11] | albedo = {{val|0.20}} {{small|(assumed)}}[9] {{val|0.270|0.059}}[8] {{val|0.2854|0.0197}}[7] | spectral_type = SMASS {{=}} S [9] | abs_magnitude = 12.5[7][9] 12.6 }}5208 Royer, provisional designation {{mp|1989 CH|1}}, is a stony Marian asteroid from the central regions of the asteroid belt, approximately {{convert|8|km|mi|abbr=off|sigfig=1|sp=us}} in diameter. It was discovered on 6 February 1989, by astronomer Eleanor Helin at the Palomar Observatory. The S-type asteroid has a rotation period of 3.87 hours and was named after American priest and amateur astronomer, Ronald Royer.[1][9] Orbit and classificationRoyer is a member of the Maria family ({{small|506}}),[5] a large family of stony asteroids with nearly 3,000 known members.[23]{{rp|23}} It orbits the Sun in the central asteroid belt at a distance of 2.5–2.7 AU once every 4 years and 2 months (1,535 days; semi-major axis of 2.6 AU). Its orbit has an eccentricity of 0.05 and an inclination of 16° with respect to the ecliptic. The body's observation arc begins with a precovery taken at Palomar Observatory in November 1953, more than 35 years prior to its official discovery observation.[1] Physical characteristicsIn the SMASS classification, Royer is a common, stony S-type asteroid.[9] Rotation period and polesIn 2004, a rotational lightcurve of Royer was obtained from photometric observations by Brazilian and Argentine astronomers. Lightcurve analysis gave a rotation period of 3.866 hours with a brightness amplitude of 0.44 magnitude ({{small|U=2}}).[10] In 2016, a modeled lightcurves using photometric data from various sources, rendered a sidereal period of 3.88494 and two spin axes of (258.0°, 74.0°) and (54.0°, 37.0°) in ecliptic coordinates.[11] Diameter and albedoAccording to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Royer measures 7.884 and 8.081 kilometers in diameter and its surface has an albedo of 0.2854 and 0.270, respectively,[7][8] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 9.40 kilometers based on an absolute magnitude of 12.5.[9] NamingThis minor planet was named after Reverend Ronald E. Royer, an American priest as well as amateur astronomer and astrophotographer.[1] He has been a member of the Los Angeles Astronomical Society (LAAS) since 1946 and received the G. Bruce Blair Award in 2001.[34] The official naming citation was published by the Minor Planet Center on 6 April 1993 ({{small|M.P.C. 21957}}).[35] References1. ^1 2 3 4 5 6 {{cite web |title = 5208 Royer (1989 CH1) |work = Minor Planet Center |url = https://www.minorplanetcenter.net/db_search/show_object?object_id=5208 |accessdate = 25 April 2018}} [1][2][3][4][5][6][7][8][9][10]2. ^1 {{cite web |title = 2001 G. Bruce Blair Award – Rev. Monsignor Ronald E. Royer |publisher = Western Amateur Astronomers |url = http://www.waa.av.org/RonRoyer_page.html |accessdate = 25 April 2018}} 3. ^1 {{cite web |title = MPC/MPO/MPS Archive |work = Minor Planet Center |url = https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html |accessdate = 25 April 2018}} 4. ^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. 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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= 25 April 2018}} 5. ^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 = 25 April 2018}} 6. ^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= 25 April 2018}} 7. ^1 2 3 4 5 6 7 {{cite web |title = LCDB Data for (5208) Royer |publisher = Asteroid Lightcurve Database (LCDB) |url = http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=5208%7CRoyer |accessdate = 25 April 2018}} 8. ^1 2 3 4 {{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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6 : Maria asteroids|Discoveries by Eleanor F. Helin|Minor planets named for people|Named minor planets|S-type asteroids (SMASS)|Astronomical objects discovered in 1989 |
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