| 词条 | 1739 Meyermann |
| 释义 |
| minorplanet = yes | name = 1739 Meyermann | background = #D6D6D6 | image = | image_size = | caption = | discovery_ref = | discovered = 15 August 1939 | discoverer = K. Reinmuth | discovery_site = Heidelberg Obs. | mpc_name = (1739) Meyermann | alt_names = 1939 PF{{·}}{{mp|1929 TB|1}} 1935 GN{{·}}{{mp|1952 HN|3}} {{mp|1953 XO|1}}{{·}}1963 TG | named_after = Bruno Meyermann {{small|(German astronomer)}} [2] | mp_category = main-belt{{·}}Flora [3] | orbit_ref = | epoch = 4 September 2017 (JD 2458000.5) | uncertainty = 0 | observation_arc = 87.57 yr (31,984 days) | aphelion = 2.5407 AU | perihelion = 1.9812 AU | semimajor = 2.2610 AU | eccentricity = 0.1237 | period = 3.40 yr (1,242 days) | mean_anomaly = 26.730° | mean_motion = {{Deg2DMS|0.2899|sup=ms}} / day | inclination = 3.4093° | asc_node = 203.35° | arg_peri = 82.116° | dimensions = {{val|6.62|0.79}} km[5] 7.47 km {{small|(calculated)}}[3] {{val|7.858|0.124}}[7] {{val|8.688|0.063}} km[8] | rotation = {{val|2.8212|0.0002}} h{{efn|name=LCDB-Pravce-2014}} {{val|2.8219|0.0002}} h{{efn|name=LCDB-Pravce-2007}} | albedo = {{val|0.1961|0.0376}}[8] 0.24 {{small|(assumed)}}[3] {{val|0.254|0.015}}[7] {{val|0.336|0.116}}[5] | spectral_type = S [3] | abs_magnitude = {{val|12.63|0.27}}[14]{{·}}12.7[5][8]{{·}}12.8[3] }} 1739 Meyermann, provisional designation {{mp|1939 PF}}, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 7.5 kilometers in diameter. It was discovered by German astronomer Karl Reinmuth at Heidelberg Observatory on 15 August 1939.[19] It was later named in memory of astronomer Bruno Meyermann.[2] Orbit and classificationMeyermann is a member of the Flora family, a large group of S-type asteroids in the inner main-belt. It orbits the Sun at a distance of 2.0–2.5 AU once every 3 years and 5 months (1,242 days). Its orbit has an eccentricity of 0.12 and an inclination of 3° with respect to the ecliptic. Meyermann was first identified as {{mp|1929 TB|1}} at Lowell Observatory in 1929, extending the body's observation arc by 10 years prior to its official discovery observation at Heidelberg.[19]Rotation periodTwo rotational lightcurves of Meyermann were obtained from photometric observations taken by Czech astronomer Petr Pravec at Ondřejov Observatory in 2007 and 2014. They gave a rotation period of 2.8212 and 2.8219 hours with a brightness variation of 0.12 and 0.17 magnitude, respectively ({{small|U=3/3}}).{{efn|name=LCDB-Pravce-2014}}{{efn|name=LCDB-Pravce-2007}} Diameter and albedoAccording to the refitted 2014-results from the survey carried out by the Wide-field Infrared Survey Explorer with its NEOWISE missions, Meyermann measures 7.858 kilometers in diameter, and its surface has an albedo of 0.254.[7] The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.24 – derived from 8 Flora, the largest member and namesake of its family – and calculates a diameter of 7.47 kilometers based on an absolute magnitude of 12.8.[3] NamingThis minor planet was named in memory of Bruno Meyermann (1876–1963), a classical astronomer and academic teacher at Göttingen Observatory in Lower Saxony, Germany. His fields of interest included polar motion and relativistic effects.[2] The official naming citation was published by the Minor Planet Center before November 1977 ({{small|M.P.C. 4155}}).[26] Notes{{notelist|refs={{efn|name=LCDB-Pravce-2007|1=Pravec (2007) web: rotation period {{val|2.8219|0.0002}} hours with a brightness amplitude of {{val|0.22}}. Quality Code of 3. Summary figures at Asteroid Lightcurve Database }}{{efn|name=LCDB-Pravce-2014|1=Pravec (2014) web: rotation period {{val|2.8212|0.0002}} hours with a brightness amplitude of {{val|0.17}}. Quality Code of 3. Summary figures at Asteroid Lightcurve Database }}}} References1. ^1 2 3 {{cite book |title = Dictionary of Minor Planet Names – (1739) Meyermann |last = Schmadel | first = Lutz D. |publisher = Springer Berlin Heidelberg |page = 138 |date = 2007 |isbn = 978-3-540-00238-3 |doi = 10.1007/978-3-540-29925-7_1740 |chapter = (1739) Meyermann }} [1][2][3][4][5][6][7][8]2. ^1 2 {{cite web |title = 1739 Meyermann (1939 PF) |work = Minor Planet Center |url = http://www.minorplanetcenter.net/db_search/show_object?object_id=1739 |accessdate = 20 December 2016}} 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 = 20 December 2016}} 4. ^1 2 3 4 5 6 {{cite web |title = LCDB Data for (1739) Meyermann |publisher = Asteroid Lightcurve Database (LCDB) |url = http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=1739%7CMeyermann |accessdate = 20 December 2016}} 5. ^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. S. |last7 = McMillan |first8 = T. |last8 = Spahr |first9 = R. M. |last9 = Cutri |first10 = E. |last10 = Wright |first11 = J. |last11 = Watkins |first12 = W. |last12 = Mo |first13 = C. |last13 = Maleszewski |date = November 2011 |title = NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results |journal = The Astrophysical Journal |volume = 741 |issue = 2 |page = 25 |bibcode = 2011ApJ...741...90M |doi = 10.1088/0004-637X/741/2/90 |arxiv = 1109.6407 }} 6. ^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 = C. |last6 = Nugent |first7 = M. S. |last7 = Cabrera |date = November 2012 |title = Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012ApJ...759L...8M |journal = The Astrophysical Journal Letters |volume = 759 |issue = 1 |page = 5 |bibcode = 2012ApJ...759L...8M |doi = 10.1088/2041-8205/759/1/L8 |arxiv = 1209.5794 |access-date= 20 December 2016}} 7. ^1 {{cite journal |display-authors = 6 |first1 = Peter |last1 = Veres |first2 = Robert |last2 = Jedicke |first3 = Alan |last3 = Fitzsimmons |first4 = Larry |last4 = Denneau |first5 = Mikael |last5 = Granvik |first6 = Bryce |last6 = Bolin |first7 = Serge |last7 = Chastel |first8 = Richard J. |last8 = Wainscoat |first9 = William S. |last9 = Burgett |first10 = Kenneth C. |last10 = Chambers |first11 = Heather |last11 = Flewelling |first12 = Nick |last12 = Kaiser |first13 = Eugen A. |last13 = Magnier |first14 = Jeff S. |last14 = Morgan |first15 = Paul A. |last15 = Price |first16 = John L. |last16 = Tonry |first17 = Christopher |last17 = Waters |date = November 2015 |title = Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015Icar..261...34V |journal = Icarus |volume = 261 |pages = 34–47 |bibcode = 2015Icar..261...34V |doi = 10.1016/j.icarus.2015.08.007 |arxiv = 1506.00762 |access-date= 20 December 2016}} 8. ^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= 20 December 2016}} }} External links
5 : Flora asteroids|Discoveries by Karl Wilhelm Reinmuth|Minor planets named for people|Named minor planets|Astronomical objects discovered in 1939 |
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