{{Short description|Vestian main-belt asteroid}} {{Use dmy dates|date=October 2019}} {{Infobox planet | minorplanet = yes | name = 1933 Tinchen | background = #D6D6D6 | image = 1933Tinchen (Lightcurve Inversion).png | image_scale = | caption = {{longitem|Lightcurve-based 3D-model of Tinchen|style=padding: 5px 0; line-height: 1.3em;}} | discovery_ref = <ref name="jpldata" /> | discovered = 14 January 1972 | discoverer = L. Kohoutek | discovery_site = Bergedorf Obs. | mpc_name = (1933) Tinchen | alt_names = 1972 AC{{·}}1956 TB<br />1956 VE{{·}}1962 JF<br />1962 JS | named_after = Christine Kohoutek<br />{{small|(wife of the discoverer)}}<ref name="springer" /> | mp_category = main-belt{{·}}Vesta<ref name="lcdb" /> | orbit_ref = <ref name="jpldata" /> | epoch = 4 September 2017 (JD 2458000.5) | uncertainty = 0 | observation_arc = 60.59 yr (22,131 days) | aphelion = 2.6437 AU | perihelion = 2.0617 AU | semimajor = 2.3527 AU | eccentricity = 0.1237 | period = 3.61 yr (1,318 days) | mean_anomaly = 315.04° | mean_motion = {{Deg2DMS|0.2731|sup=ms}} / day | inclination = 6.8822° | asc_node = 164.93° | arg_peri = 214.52° | dimensions = {{val|4.51|0.11}} km<ref name="Masiero-2012" /><br />5.04 km {{small|(calculated)}}<ref name="lcdb" /><br />{{val|6.454|0.041}} km<ref name="WISE" /> | rotation = {{val|3.67|0.07}} h<ref name="geneva-obs" /><br />{{val|3.6703|0.0006}} h<ref name="Waszczak-2015" /><br />{{val|3.671|0.005}} h<ref name="Hasegawa-2014a" /><br />{{val|3.672|0.003}} h{{efn|name=LCDB-Ryan-2007}} | albedo = {{val|0.2950|0.0588}}<ref name="WISE" /><br />0.4 {{small|(assumed)}}<ref name="lcdb" /><br />{{val|0.613|0.029}}<ref name="Masiero-2012" /> | spectral_type = V<ref name="lcdb" /> | abs_magnitude = {{val|12.769|0.003}} {{small|(R)}}<ref name="Waszczak-2015" />{{·}}12.88<ref name="Masiero-2012" />{{·}}12.9<ref name="WISE" />{{·}}{{val|13.07|0.32}}<ref name="Veres-2015" />{{·}}13.1<ref name="jpldata" /><ref name="lcdb" /> }}
'''1933 Tinchen''', provisional designation {{mp|1972 AC}}, is a Vestian asteroid from the inner regions of the asteroid belt, about 5 kilometers in diameter. It was discovered on 14 January 1972, by Czech astronomer Luboš Kohoutek at the Hamburger Bergedorf Observatory in Germany, who named it after his wife, Christine Kohoutek.<ref name="springer" /><ref name="MPC-Tinchen" />
== Classification and orbit ==
Tinchen orbits the Sun in the inner main-belt at a distance of 2.1–2.6 AU once every 3 years and 7 months (1,318 days). Its orbit has an eccentricity of 0.12 and an inclination of 7° with respect to the ecliptic.<ref name="jpldata" />
The vestoid or V-type asteroid is also a member of the Vesta family. Asteroids with these spectral and orbital characteristics are thought to have all originated from Rheasilvia, a large impact crater on the south-polar surface of 4 Vesta, which is the main-belt's second-most-massive asteroid after 1 Ceres.
== Physical characteristics ==
Tinchen has a rotation period of 3.671 hours.<ref name="geneva-obs" /><ref name="Waszczak-2015" />{{efn|name=LCDB-Ryan-2007}}
According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Tinchen measures between 4.51 and 6.454 kilometers in diameter and its surface has an albedo between 0.2950 and 0.613.<ref name="Masiero-2012" /><ref name="WISE" /> The Collaborative Asteroid Lightcurve Link assumes a standard albedo for Vestian asteroids of 0.40 and calculates a diameter of 5.04 kilometers with an absolute magnitude of 13.1.<ref name="lcdb" />
== Naming ==
The discoverer named this minor planet after his wife, Christine Kohoutek.<ref name="springer" /> The official {{MoMP|1933|naming citation}} was published by the Minor Planet Center on 20 February 1976 ({{small|M.P.C. 3938}}).<ref name="DoMP-Circular-dates" />
== Notes == {{notelist|refs=
{{efn|name=LCDB-Ryan-2007|1=Ryan 2007 (web) figures at LCDB for results of [http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=1933%7CTinchen LCDB – 1933 Tinchen]}}
}} <!-- end of notelist -->
== References == <references>
<ref name="jpldata">{{cite web |type = 2017-05-05 last obs. |title = JPL Small-Body Database Browser: 1933 Tinchen (1972 AC) |url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001933 |publisher = Jet Propulsion Laboratory |accessdate = 10 June 2017}}</ref>
<ref name="springer">{{cite book |title = Dictionary of Minor Planet Names – (1933) Tinchen |last = Schmadel | first = Lutz D. |publisher = Springer Berlin Heidelberg |page = 155 |date = 2007 |isbn = 978-3-540-00238-3 |doi = 10.1007/978-3-540-29925-7_1934 |chapter = (1933) Tinchen }}</ref>
<ref name="MPC-Tinchen">{{cite web |title = 1933 Tinchen (1972 AC) |work = Minor Planet Center |url = https://www.minorplanetcenter.net/db_search/show_object?object_id=1933 |accessdate = 9 December 2016}}</ref>
<ref name="DoMP-Circular-dates">{{cite book |title = Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008) |year = 2009 |url = https://archive.org/details/dictionaryminorp2008schm |url-access = limited |chapter = Appendix – Publication Dates of the MPCs |last = Schmadel |first=Lutz D. |publisher = Springer Berlin Heidelberg |page = [https://archive.org/details/dictionaryminorp2008schm/page/n230 221] |isbn = 978-3-642-01964-7 |doi = 10.1007/978-3-642-01965-4}}</ref>
<ref name="geneva-obs">{{cite web |title = Asteroids and comets rotation curves – (1933) Tinchen |last = Behrend |first = Raoul |publisher = Geneva Observatory |url = http://obswww.unige.ch/~behrend/page4cou.html#001933 |accessdate = 9 December 2016}}</ref>
<ref name="lcdb">{{cite LCDB|number = 1933 |accessdate = 9 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= 9 December 2016}}</ref>
<ref name="Hasegawa-2014a">{{Cite journal |display-authors = 6 |first1 = Sunao |last1 = Hasegawa |first2 = Seidai |last2 = Miyasaka |first3 = Hiroyuki |last3 = Mito |first4 = Yuki |last4 = Sarugaku |first5 = Tomohiko |last5 = Ozawa |first6 = Daisuke |last6 = Kuroda |first7 = Setsuko |last7 = Nishihara |first8 = Akari |last8 = Harada |first9 = Michitoshi |last9 = Yoshida |first10 = Kenshi |last10 = Yanagisawa |first11 = Yasuhiro |last11 = Shimizu |first12 = Shogo |last12 = Nagayama |first13 = Hiroyuki |last13 = Toda |first14 = Kichi |last14 = Okita |first15 = Nobuyuki |last15 = Kawai |first16 = Machiko |last16 = Mori |first17 = Tomohiko |last17 = Sekiguchi |first18 = Masateru |last18 = Ishiguro |first19 = Takumi |last19 = Abe |first20 = Masanao |last20 = Abe |date = June 2014 |title = Lightcurve survey of V-type asteroids in the inner asteroid belt |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2014PASJ...66...54H |journal = Publications of the Astronomical Society of Japan |volume = 66 |issue = 3 |page = 5415 |bibcode = 2014PASJ...66...54H |doi = 10.1093/pasj/psu040 |access-date= 9 December 2016|arxiv = 1311.4653 }}</ref>
<ref name="Waszczak-2015">{{cite journal |display-authors = 6 |first1 = Adam |last1 = Waszczak |first2 = Chan-Kao |last2 = Chang |first3 = Eran O. |last3 = Ofek |first4 = Russ |last4 = Laher |first5 = Frank |last5 = Masci |first6 = David |last6 = Levitan |first7 = Jason |last7 = Surace |first8 = Yu-Chi |last8 = Cheng |first9 = Wing-Huen |last9 = Ip |first10 = Daisuke |last10 = Kinoshita |first11 = George |last11 = Helou |first12 = Thomas A. |last12 = Prince |first13 = Shrinivas |last13 = Kulkarni |date = September 2015 |title = Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015AJ....150...75W |journal = The Astronomical Journal |volume = 150 |issue = 3 |page = 35 |bibcode = 2015AJ....150...75W |doi = 10.1088/0004-6256/150/3/75 |arxiv = 1504.04041 |access-date= 9 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= 9 December 2016}}</ref>
</references> <!-- 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/20110721225144/http://www.minorplanet.info/lightcurvedatabase.html |date=21 July 2011 }}) * [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|1933}} * {{JPL small body}}
{{Minor planets navigator |1932 Jansky |number=1933 |1934 Jeffers}} {{Small Solar System bodies}} {{Authority control}}
{{DEFAULTSORT:Tinchen}} 001933 Category:Discoveries by Luboš Kohoutek Category:Named minor planets 19720114