| 词条 | 1915 Quetzálcoatl |
| 释义 |
| minorplanet = yes | name = 1915 Quetzálcoatl | background = #FFC2E0 | image = | image_size = | caption = | discovery_ref = | discovered = 9 March 1953 | discoverer = A. G. Wilson | discovery_site = Palomar Obs. | mpc_name = (1915) Quetzálcoatl | alt_names = 1953 EA | named_after = Quetzalcoatl {{small|(Mesoamerican deity)}}[2] | mp_category = NEO{{·}}Amor [4]{{·}}Alinda | orbit_ref = | epoch = 4 September 2017 (JD 2458000.5) | uncertainty = 0 | observation_arc = 51.59 yr (18,842 days) | aphelion = 3.9958 AU | perihelion = 1.0928 AU | semimajor = 2.5443 AU | eccentricity = 0.5705 | period = 4.06 yr (1,482 days) | mean_anomaly = 12.497° | inclination = 20.402° | asc_node = 162.95° | arg_peri = 347.88° | moid = 0.1102 AU{{·}}42.9 LD | dimensions = {{val|0.40}} km[6] 0.5 km | rotation = {{val|4.9}} h[8] | albedo = 0.21 {{val|0.31}}[6] | spectral_type = Tholen = SMU {{·}}SMU [12] B–V = 0.784 U–B = 0.430 | abs_magnitude = 18.88[12]{{·}}{{val|18.88|0.11}}[16][17]{{·}}18.90[6]{{·}}18.97 }}1915 Quetzálcoatl, provisional designation {{mp|1953 EA}}, is a very eccentric, stony asteroid classified as near-Earth object, about half a kilometer in diameter. It was discovered on 9 March 1953, by American astronomer Albert George Wilson at Palomar Observatory, California.[4] It was named for Quetzalcoatl from Aztec mythology.[2] Orbit and classificationQuetzálcoatl is an Amor asteroid – a subgroup of near-Earth asteroids that approach the orbit of Earth from beyond, but do not cross it – and a member of the Alinda family of highly eccentric asteroids. It orbits the Sun at a distance of 1.1–4.0 AU with a period of around 4 years. The osculating orbit as of 2017 has a period just over 4 years, but the period varies because Quetzálcoatl is near the 3:1 orbital resonance with Jupiter (and possibly because it is near the 1:4 resonance with Earth). Its orbit has an eccentricity of 0.57 and an inclination of 20° with respect to the ecliptic.When it was discovered in March 1953 it had a magnitude around 15, but in recent times its magnitude rarely dips below 20 because even when it is near perihelion it is far from Earth. After the 1953 close approach there were others every four years until March 1981, but the next one will not be until 77 years (19 orbits averaging 4,05 years) later, in February 2062, when its magnitude will be about 17. Its magnitude will get to around 16 (a bit less bright than in 1953) 52 years (13 orbits) later in 2114. Another close approach will occur 39 years (10 orbits) later in 2153 (average period 3.9 years). In the 285 years from 1953 to 2238 it makes 72 orbits, giving an average period of 3.96 years (quite close to a third of Jupiter's period, which comes to 3.95 years).[1] Its Earth Minimum orbit intersection distance (MOID) is 0.1102 AU which translates into 42.9 lunar distances. On 24 February 2062, it will make a close approach and pass by Earth at a distance of {{convert |0.1339 |AU |km |abbr=on |lk=off |sigfig=3}}. Physical characteristicsIn the Tholen classification, Quetzálcoatl is classified as a rare SMU-subtype of the broader S-type asteroids. Its mean-diameter is between 0.4 and 0.5 kilometers.[6] It has a rotation period of 4.9 hours[8] and an albedo of 0.21–0.31.[6] In 1981, this object was observed with radar from the Arecibo Observatory at a distance of 0.09 AU. The measured radar cross-section was 0.02 km2.[30] NamingThis minor planet is named after the "feathered serpent" Quetzalcoatl, the Mesoamerican deity of wisdom and culture who brought learning to the Toltec people.[2] The official naming citation was published by the Minor Planet Center before November 1977 ({{small|M.P.C. 3827}}).[32] References1. ^[https://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=2001915 NASA ephemeris calculator] [2][3][4][5][6][7][8][9][10]2. ^1 2 3 {{cite book |title = Dictionary of Minor Planet Names – (1915) Quetzálcoatl |last = Schmadel | first = Lutz D. |publisher = Springer Berlin Heidelberg |page = 154 |date = 2007 |isbn = 978-3-540-00238-3 |doi = 10.1007/978-3-540-29925-7_1916 |chapter = (1915) Quetzálcoatl }} 3. ^1 2 {{cite web |title = 1915 Quetzálcoatl (1953 EA) |work = Minor Planet Center |url = http://www.minorplanetcenter.net/db_search/show_object?object_id=1915 |accessdate = 10 December 2016}} 4. ^1 {{cite web |title = MPC/MPO/MPS Archive |work = Minor Planet Center |url = http://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html |accessdate = 10 December 2016}} 5. ^1 {{Cite journal |display-authors = 6 |first1 = S. J. |last1 = Ostro |first2 = D. B. |last2 = Campbell |first3 = J. F. |last3 = Chandler |first4 = I. I. |last4 = Shapiro |first5 = A. A. |last5 = Hine |first6 = R. |last6 = Velez |first7 = R. F. |last7 = Jurgens |first8 = K. D. |last8 = Rosema |first9 = R. |last9 = Winkler |first10 = D. K. |last10 = Yeomans |date = October 1991 |title = Asteroid radar astrometry |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1991AJ....102.1490O |journal = Astronomical Journal |volume = 102 |pages = 1490–1502 |issn = 0004-6256 |bibcode = 1991AJ....102.1490O |doi = 10.1086/115975 |access-date= 10 December 2016}} 6. ^1 2 {{cite web |title = LCDB Data for (1915) Quetzálcoatl |publisher = Asteroid Lightcurve Database (LCDB) |url = http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=1915%7CQuetzálcoatl |accessdate = 10 December 2016}} 7. ^1 2 3 4 5 {{Cite journal |author = Harris, Alan W. |date = February 1998 |title = A Thermal Model for Near-Earth Asteroids |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1998Icar..131..291H |journal = Icarus |volume = 131 |issue = 2 |pages = 291–301 |bibcode = 1998Icar..131..291H |doi = 10.1006/icar.1997.5865 |access-date= 10 December 2016}} 8. ^1 2 {{Cite journal |first1 = R. P. |last1 = Binzel |first2 = D. J. |last2 = Tholen |date = September 1983 |title = The rotation, color, phase coefficient, and diameter of 1915 Quetzalcoatl |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1983Icar...55..495B |journal = Icarus |volume = 55 |issue = 3 |pages = 495–497 |issn = 0019-1035 |bibcode = 1983Icar...55..495B |doi = 10.1016/0019-1035(83)90118-5 |access-date= 10 December 2016}} 9. ^1 {{Cite journal |first1 = A. W. |last1 = Harris |first2 = J. W. |last2 = Young |date = October 1989 |title = Asteroid lightcurve observations from 1979-1981 |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1989Icar...81..314H |journal = Icarus |volume = 81 |issue = 2 |pages = 314–364 |issn = 0019-1035 |bibcode = 1989Icar...81..314H |doi = 10.1016/0019-1035(89)90056-0 |access-date= 10 December 2016}} 10. ^1 {{Cite journal |first1 = Petr |last1 = Pravec |first2 = Alan W. |last2 = Harris |first3 = Peter |last3 = Kusnirák |first4 = Adrián |last4 = Galád |first5 = Kamil |last5 = Hornoch |date = September 2012 |title = Absolute magnitudes of asteroids and a revision of asteroid albedo estimates from WISE thermal observations |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012Icar..221..365P |journal = Icarus |volume = 221 |issue = 1 |pages = 365–387 |bibcode = 2012Icar..221..365P |doi = 10.1016/j.icarus.2012.07.026 |access-date= 10 December 2016}} }} External links
8 : Amor asteroids|Alinda asteroids|Discoveries by Albert George Wilson|Minor planets named from Aztec mythology|Named minor planets|Radar-imaged asteroids|SMU-type asteroids (Tholen)|Astronomical objects discovered in 1953 |
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