{{Short description|Main-belt asteroid}} {{Use dmy dates|date=October 2019}} {{Infobox planet | minorplanet = yes | name = 10656 Albrecht | background = #D6D6D6 | image = 010656-asteroid shape model (10656) Albrecht.png | image_scale = | caption = Shape model of ''Albrecht'' from its lightcurve | discovery_ref = <ref name="jpldata" /> | discoverer = C. J. van Houten<br />I. van Houten-G.<br />T. Gehrels | discovery_site = Palomar Obs. | discovered = 25 March 1971 | mpc_name = (10656) Albrecht | alt_names = 2213 T-1{{·}}{{mp|1990 SZ|25}}<br />3011 T-2 | named_after = Carl Albrecht {{small|(astronomer)}}<ref name="springer" /> | mp_category = main-belt{{·}}{{small|(outer)}}<ref name="lcdb" /><br />background | orbit_ref = <ref name="jpldata" /> | epoch = 4 September 2017 (JD 2458000.5) | uncertainty = 0 | observation_arc = 64.30 yr (23,486 days) | aphelion = 3.4431 AU | perihelion = 2.9060 AU | semimajor = 3.1746 AU | eccentricity = 0.0846 | period = 5.66 yr (2,066 days) | mean_anomaly = 312.02° | mean_motion = {{Deg2DMS|0.1743|sup=ms}} / day | inclination = 8.5240° | asc_node = 5.2018° | arg_peri = 317.26° | mean_diameter = {{val|7.057|0.365|ul=km}}<ref name="WISE" /><ref name="Masiero-2011" /><br />12.83 km {{small|(calculated)}}<ref name="lcdb" /> | rotation = {{val|14.4899|0.0684|ul=h}}<ref name="Waszczak-2016" /> | albedo = 0.057 {{small|(assumed)}}<ref name="lcdb" /><br />{{val|0.323|0.057}}<ref name="WISE" /><ref name="Masiero-2011" /> | spectral_type = C<ref name="lcdb" /> | abs_magnitude = 12.8<ref name="jpldata" />{{·}}12.6<ref name="WISE" />{{·}}{{val|12.737|0.004}} {{small|(R)}}<ref name="Waszczak-2016" />{{·}}13.19<ref name="lcdb" /> }}
'''10656 Albrecht''' (''prov. designation'': {{mp|2213 T-1}}) is a carbonaceous background asteroid from the outer region of the asteroid belt, approximately {{convert|10|km|mi|abbr=off|sigfig=2|sp=us}} in diameter. It was named after German astronomer Carl Theodor Albrecht.<ref name="springer" />
== Discovery ==
''Albrecht'' was discovered on 25 March 1971, by Dutch astronomer couple Ingrid and Cornelis van Houten, on photographic plates taken by Dutch–American astronomer Tom Gehrels at the U.S. Palomar Observatory, California.<ref name="MPC-Albrecht" /> The first precovery was taken at Palomar Observatory in 1953, extending the asteroid's observation arc by 18 years prior to its discovery.<ref name="MPC-Albrecht" />
The special designation ''T-1'' stands for the first Palomar–Leiden Trojan survey, named after the fruitful collaboration of the Palomar and Leiden Observatory in the 1960s and 1970s. Gehrels used Palomar's Samuel Oschin telescope (also known as the 48-inch Schmidt Telescope), and shipped the photographic plates to Cornelis and Ingrid van Houten-Groeneveld at Leiden Observatory where astrometry was carried out. The trio of astronomers are credited with the discovery of 4,620 minor planets.<ref name="MPC-discoverers" />
== Classification and orbit ==
The dark C-type asteroid orbits the Sun in the outer main-belt at a distance of 2.9–3.4 AU once every 5 years and 8 months (2,066 days). Its orbit has an eccentricity of 0.08 and an inclination of 9° with respect to the ecliptic.of 2.9–3.4 AU once every 5 years and 8 months (2,070 days). Its orbit is tilted by 9° to the plane of the ecliptic and shows an eccentricity of 0.09.<ref name="jpldata" />
== Naming ==
This minor planet was named in honor of German astronomer Carl Theodor Albrecht (1843–1915), who was instrumental in establishing the ''International Latitude Service'' (ILS) in 1899. The ILS was located at the ''Prussian Geodetic Institute'' in Berlin. Albrecht was also the first director of the ILS.<ref name="springer" /> The approved naming citation was published by the Minor Planet Center on 20 November 2002 ({{small|M.P.C. 47167}}).<ref name="MPC-Circulars-Archive" />
== Physical characteristics ==
=== Rotation period ===
A rotational lightcurve of this asteroid was obtained from photometric observations made at the U.S. Palomar Transient Factory in October 2013. The lightcurve gave a rotation period of {{val|14.4899|0.0684}} hours with a brightness amplitude of 0.35 in magnitude ({{small|U=2}}).<ref name="Waszczak-2016" />
=== Diameter and albedo ===
According to the survey carried out by the NEOWISE mission of NASA's space-based Wide-field Infrared Survey Explorer, the asteroid measures 7.1 kilometers in diameter and its surface has a high albedo of 0.32,<ref name="WISE" /><ref name="Masiero-2011" /> while the ''Collaborative Asteroid Lightcurve Link'' assumes a standard albedo for carbonaceous asteroids of 0.057 and calculates a larger diameter of 12.8 kilometers with an absolute magnitude of 13.19.<ref name="lcdb" />
== References == {{reflist|30em|refs=
<ref name="jpldata">{{cite web |type = 2017-06-05 last obs. |title = JPL Small-Body Database Browser: 10656 Albrecht (2213 T-1) |url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2010656 |publisher = Jet Propulsion Laboratory |access-date = 5 July 2017}}</ref>
<ref name="springer">{{cite book |title = Dictionary of Minor Planet Names |last = Schmadel | first = Lutz D. |publisher = Springer Berlin Heidelberg |chapter = (10656) Albrecht |page = 741 |date = 2007 |isbn = 978-3-540-00238-3 |doi = 10.1007/978-3-540-29925-7_8065}}</ref>
<ref name="MPC-Albrecht">{{cite web |title = 10656 Albrecht (2213 T-1) |work = Minor Planet Center |url = https://www.minorplanetcenter.net/db_search/show_object?object_id=10656 |access-date = 7 May 2016}}</ref>
<ref name="MPC-Circulars-Archive">{{cite web |title = MPC/MPO/MPS Archive |work = Minor Planet Center |url = https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html |access-date = 7 May 2016}}</ref>
<ref name="lcdb">{{cite LCDB|number = 10656 |access-date = 7 May 2016}}</ref>
<ref name="MPC-discoverers">{{cite web |title = Minor Planet Discoverers |work = Minor Planet Center |url = https://www.minorplanetcenter.net/iau/lists/MPDiscsNum.html |date = 28 December 2015 |access-date = 1 January 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|s2cid = 35447010 }}</ref>
<ref name="Waszczak-2016">{{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 |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|s2cid = 8342929 }}</ref>
<ref name="Masiero-2011">{{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. L. |last13 = Wright |first14 = E. |last14 = DeBaun |first15 = D. |last15 = Elsbury |first16 = T. IV |last16 = Gautier |first17 = S. |last17 = Gomillion |first18 = A. |last18 = Wilkins |date = November 2011 |title = Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters |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|s2cid = 118745497 }}</ref>
}} <!-- end of reflist -->
== External links == * [https://link.springer.com/article/10.1023%2FA%3A1006701327419 The International Latitude Service] – A Historical Review, Joachim Höpfner * [http://www.minorplanet.info/PHP/OneAsteroidInfo.php Lightcurve Database Query] (LCDB), at ''www.minorplanet.info'' * [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] – ''Geneva Observatory'', Raoul Behrend * [https://www.minorplanetcenter.net/iau/lists/NumberedMPs010001.html Discovery Circumstances: Numbered Minor Planets (10000)-(15000)] – Minor Planet Center * {{AstDys|10656}} * {{JPL small body}}
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{{DEFAULTSORT:Albrecht}} 010656 2213 Category:Discoveries by Cornelis Johannes van Houten Category:Discoveries by Ingrid van Houten-Groeneveld Category:Discoveries by Tom Gehrels Category:Named minor planets 3011 19710325