{{Short description|Main-belt asteroid}} {{Use dmy dates|date=October 2019}} {{Infobox planet | minorplanet = yes | name = 1739 Meyermann | background = #D6D6D6 | image = | image_size = | caption = | discovery_ref = <ref name="jpldata" /> | discovered = 15 August 1939 | discoverer = K. Reinmuth | discovery_site = Heidelberg Obs. | mpc_name = (1739) Meyermann | alt_names = 1939 PF{{·}}{{mp|1929 TB|1}}<br />1935 GN{{·}}{{mp|1952 HN|3}}<br />{{mp|1953 XO|1}}{{·}}1963 TG | named_after = Bruno Meyermann<br />{{small|(German astronomer)}}<ref name="springer" /> | mp_category = main-belt{{·}}Flora<ref name="lcdb" /> | orbit_ref = <ref name="jpldata" /> | 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<ref name="Masiero-2012" /><br />7.47 km {{small|(calculated)}}<ref name="lcdb" /><br />{{val|7.858|0.124}}<ref name="Masiero-2014" /><br />{{val|8.688|0.063}} km<ref name="WISE" /> | rotation = {{val|2.8212|0.0002}} h{{efn|name=LCDB-Pravce-2014}}<br />{{val|2.8219|0.0002}} h{{efn|name=LCDB-Pravce-2007}} | albedo = {{val|0.1961|0.0376}}<ref name="WISE" /><br />0.24 {{small|(assumed)}}<ref name="lcdb" /><br />{{val|0.254|0.015}}<ref name="Masiero-2014" /><br />{{val|0.336|0.116}}<ref name="Masiero-2012" /> | spectral_type = S<ref name="lcdb" /> | abs_magnitude = {{val|12.63|0.27}}<ref name="Veres-2015" />{{·}}12.7<ref name="Masiero-2012" /><ref name="WISE" />{{·}}12.8<ref name="jpldata" /><ref name="lcdb" /> }}
'''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.<ref name="MPC-Meyermann" /> It was later named in memory of astronomer Bruno Meyermann.<ref name="springer" />
== Orbit and classification ==
''Meyermann'' 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.<ref name="jpldata" /> ''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.<ref name="MPC-Meyermann" />
=== Rotation period ===
Two 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 albedo ===
According 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.<ref name="Masiero-2014" /> 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.<ref name="lcdb" />
== Naming ==
This 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.<ref name="springer" /> The official {{MoMP|1739|naming citation}} was published by the Minor Planet Center on 18 April 1977 ({{small|M.P.C. 4155}}).<ref name="DoMP-Circular-dates" />
== 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 [http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=1739%7CMeyermann 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 [http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=1739%7CMeyermann Asteroid Lightcurve Database] }}
}} <!-- end of notelist -->
== References == {{reflist|30em|refs=
<ref name="jpldata">{{cite web |type = 2017-05-05 last obs. |title = JPL Small-Body Database Browser: 1739 Meyermann (1939 PF) |url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001739 |publisher = Jet Propulsion Laboratory |accessdate = 7 June 2017}}</ref>
<ref name="springer">{{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 }}</ref>
<ref name="MPC-Meyermann">{{cite web |title = 1739 Meyermann (1939 PF) |work = Minor Planet Center |url = https://www.minorplanetcenter.net/db_search/show_object?object_id=1739 |accessdate = 20 December 2016}}</ref>
<ref name="DoMP-Circular-dates">{{cite book |title = Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008) |chapter = Appendix – Publication Dates of the MPCs |last = Schmadel |first=Lutz D. |publisher = Springer Berlin Heidelberg |page = 221 |isbn = 978-3-642-01964-7 |doi = 10.1007/978-3-642-01965-4}}</ref>
<ref name="lcdb">{{cite LCDB|number = 1739 |accessdate = 20 December 2016}}</ref>
<ref name="WISE">{{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}}</ref>
<ref name="Masiero-2012">{{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}}</ref>
<ref name="Veres-2015">{{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}}</ref>
<ref name="Masiero-2014">{{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}}</ref>
}} <!-- end of reflist -->
== External links == * [http://www.minorplanet.info/PHP/lcdbsummaryquery.php Asteroid Lightcurve Database (LCDB)], query form ([http://www.minorplanet.info/lightcurvedatabase.html info] {{Webarchive|url=https://web.archive.org/web/20171216050541/http://www.minorplanet.info/lightcurvedatabase.html |date=16 December 2017 }}) * [https://books.google.com/books?id=aeAg1X7afOoC&pg Dictionary of Minor Planet Names], Google books * [http://obswww.unige.ch/~behrend/page_cou.html Asteroids and comets rotation curves, CdR] – Observatoire de Genève, Raoul Behrend * [https://www.minorplanetcenter.net/iau/lists/NumberedMPs000001.html Discovery Circumstances: Numbered Minor Planets (1)-(5000)] – Minor Planet Center * {{AstDys|1739}} * {{JPL small body}}
{{Minor planets navigator |1738 Oosterhoff |number=1739 |1740 Paavo Nurmi}} {{Small Solar System bodies}} {{Authority control}}
{{DEFAULTSORT:Meyermann}} 001739 Category:Discoveries by Karl Wilhelm Reinmuth Category:Named minor planets 19390815