{{Short description|Main-belt asteroid}} {{Use dmy dates|date=October 2019}} {{Infobox planet | minorplanet = yes | name = 1202 Marina | background = #D6D6D6 | image = | image_size = | caption = | discovery_ref = <ref name="jpldata" /> | discoverer = G. Neujmin | discovery_site = Simeiz Obs. | discovered = 13 September 1931 | mpc_name = (1202) Marina | alt_names = 1931 RL{{·}}1931 TH<br />{{mp|1980 BL|3}}{{·}}A924 WG<br />A924 YA | pronounced = | named_after = Marina Lavrova–Berg<ref name="springer" /><br />(Soviet scientist) | mp_category = main-belt{{·}}(outer)<ref name="jpldata" /><br />Hilda<ref name="MPC-object" /><ref name="lcdb" /> | orbit_ref = <ref name="jpldata" /> | epoch = 4 September 2017 (JD 2458000.5) | uncertainty = 0 | observation_arc = 92.99 yr (33,964 days) | aphelion = 4.6621 AU | perihelion = 3.3339 AU | semimajor = 3.9980 AU | eccentricity = 0.1661 | period = 7.99 yr (2,920 days) | mean_anomaly = 346.16° | mean_motion = {{Deg2DMS|0.1233|sup=ms}} / day | inclination = 3.3338° | asc_node = 49.880° | arg_peri = 307.45° | jupiter_moid = 0.7908 AU | dimensions = {{val|54.93|2.6}} km<ref name="SIMPS" /><br />55.07 km (derived)<ref name="lcdb" /><br />{{val|63.76|1.28}} km<ref name="AKARI" /> | rotation = {{val|9.45}} h<ref name="Dahlgren-1998" /><br />{{val|9.571|0.0042}} h<ref name="Waszczak-2015" /> | albedo = {{val|0.026|0.001}}<ref name="AKARI" /><br />{{val|0.0337|0.003}}<ref name="SIMPS" /><br />0.045 (derived)<ref name="lcdb" /> | spectral_type = Tholen {{=}} P<ref name="lcdb" /> | abs_magnitude = {{val|9.756|0.001}} (R)<ref name="Waszczak-2015" />{{·}}10.0<ref name="jpldata" />{{·}}{{val|10.09|0.23}}<ref name="Veres-2015" />{{·}}10.28<ref name="lcdb" /><ref name="Dahlgren-1998" />{{·}}10.60<ref name="SIMPS" /><ref name="AKARI" /> }}
'''1202 Marina''' (provisional designation '''{{mp|1931 RL}}''') is a primitive Hildian background asteroid from the outermost regions of the asteroid belt, approximately 55 kilometers in diameter. It was discovered by Grigory Neujmin at the Simeiz Observatory in 1931, and later named in honor of Marina Lavrova–Berg, a scientific collaborator at Pulkovo Observatory, who died at an early age during WWII.<ref name="MPC-object" />
== Discovery == Marina was discovered on 13 September 1931, by Soviet astronomer Grigory Neujmin at the Simeiz Observatory on the Crimean peninsula.<ref name="MPC-object" /> Two nights later, it was independently discovered by German astronomer Karl Reinmuth at the Heidelberg Observatory on 15 September 1931.<ref name="springer" /> The Minor Planet Center only recognizes the first discoverer.<ref name="MPC-object" />
The asteroid was first observed as {{mp|A924 WG}} at Heidelberg Observatory in November 1924. The body's observation arc also begins at Heidelberg in January 1925, more than 6 years prior to its official discovery observation at Simeiz.<ref name="MPC-object" />
== Orbit and classification == Marina is a non-family background asteroid of the Hilda group, located in the outermost region of the main-belt and in a 3:2 resonance with the giant planet Jupiter.<ref name="AstDys-object" /><ref name="lcdb" /> It orbits the Sun at a distance of 3.3–4.7 AU once every 7 years and 12 months (2,920 days; semi-major axis of 4.00 AU). Its orbit has an eccentricity of 0.17 and an inclination of 3° with respect to the ecliptic.<ref name="jpldata" />
== Physical characteristics == In the Tholen classification, Marina is a primitive P-type asteroid.<ref name="lcdb" />
=== Rotation period === In the 1990s, a rotational lightcurve of Marina was obtained from a survey of Hildian asteroids by European astronomers. Lightcurve analysis gave a well-defined rotation period of 9.45 hours with a brightness variation of 0.29 magnitude ({{small|U=3}}).<ref name="Dahlgren-1998" /> In October 2010, photometric observations in the R-band by astronomers at the Palomar Transient Factory in California gave a similar period of 9.571 hours and an amplitude of 0.09 ({{small|U=1}}).<ref name="Waszczak-2015" />
=== Diameter and albedo === According to the surveys carried out by the Infrared Astronomical Satellite IRAS and the Japanese Akari satellite, ''Marina'' measures 54.93 and 63.76 kilometers in diameter and its surface has a low albedo of 0.0337 and 0.026, respectively.<ref name="SIMPS" /><ref name="AKARI" />
The ''Collaborative Asteroid Lightcurve Link'' derives an albedo of 0.045 and a diameter of 55.07 kilometers based on an absolute magnitude of 10.28.<ref name="lcdb" />
== Naming == This minor planet was named after Marina Davydovna Lavrova–Berg (1898–1943), a scientific collaborator who worked at the Pulkovo Observatory near Saint Petersburg during 1931–1942.<ref name="springer" />
== References == {{reflist|30em|refs=
<ref name="jpldata">{{cite web |type = 2017-11-25 last obs. |title = JPL Small-Body Database Browser: 1202 Marina (1931 RL) |url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001202 |publisher = Jet Propulsion Laboratory |accessdate = 5 January 2018}}</ref>
<ref name="springer">{{cite book |last = Schmadel | first = Lutz D. |title = Dictionary of Minor Planet Names |publisher = Springer Berlin Heidelberg |page = 100 |date = 2007 |isbn = 978-3-540-00238-3 |doi = 10.1007/978-3-540-29925-7_1203 |chapter = (1202) Marina }}</ref>
<ref name="MPC-object">{{cite web |title = 1202 Marina (1931 RL) |work = Minor Planet Center |url = https://www.minorplanetcenter.net/db_search/show_object?object_id=1202 |accessdate = 5 January 2018}}</ref>
<ref name="AstDys-object">{{cite web |title = Asteroid 1202 Marina – Proper Elements |publisher = AstDyS-2, Asteroids – Dynamic Site |url = https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=1202 |access-date= 28 October 2019}}</ref>
<ref name="lcdb">{{cite LCDB|number = 1202 |accessdate = 5 January 2018}}</ref>
<ref name="SIMPS">{{cite journal |first1 = E. F. |last1 = Tedesco |first2 = P. V. |last2 = Noah |first3 = M. |last3 = Noah |first4 = S. D. |last4 = Price |date = October 2004 |title = IRAS Minor Planet Survey V6.0 |url = https://sbnarchive.psi.edu/pds3/iras/IRAS_A_FPA_3_RDR_IMPS_V6_0/data/diamalb.tab |journal = NASA Planetary Data System |volume = 12 |pages = IRAS-A-FPA-3-RDR-IMPS-V6.0 |bibcode = 2004PDSS...12.....T |accessdate = 22 October 2019}}</ref>
<ref name="AKARI">{{cite journal |display-authors = 6 |first1 = Fumihiko |last1 = Usui |first2 = Daisuke |last2 = Kuroda |first3 = Thomas G. |last3 = Müller |first4 = Sunao |last4 = Hasegawa |first5 = Masateru |last5 = Ishiguro |first6 = Takafumi |last6 = Ootsubo |first7 = Daisuke |last7 = Ishihara |first8 = Hirokazu |last8 = Kataza |first9 = Satoshi |last9 = Takita |first10 = Shinki |last10 = Oyabu |first11 = Munetaka |last11 = Ueno |first12 = Hideo |last12 = Matsuhara |first13 = Takashi |last13 = Onaka |date = October 2011 |title = Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey |journal = Publications of the Astronomical Society of Japan |volume = 63 |issue = 5 |pages = 1117–1138 |bibcode = 2011PASJ...63.1117U |doi = 10.1093/pasj/63.5.1117 |doi-access= }} ([http://vizier.cfa.harvard.edu/viz-bin/VizieR-5?-source=J/PASJ/63/1117/acua_v1&Num=1202 online], [https://core.ac.uk/download/pdf/43545172.pdf AcuA catalog p. 153])</ref>
<ref name="Dahlgren-1998">{{Cite journal |display-authors = 6 |first1 = M. |last1 = Dahlgren |first2 = J. F. |last2 = Lahulla |first3 = C.-I. |last3 = Lagerkvist |first4 = J. |last4 = Lagerros |first5 = S. |last5 = Mottola |first6 = A. |last6 = Erikson |first7 = M. |last7 = Gonano-Beurer |first8 = M. |last8 = Di Martino |date = June 1998 |title = A Study of Hilda Asteroids. V. Lightcurves of 47 Hilda Asteroids |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1998Icar..133..247D |journal = Icarus |volume = 133 |issue = 2 |pages = 247–285 |bibcode = 1998Icar..133..247D |doi = 10.1006/icar.1998.5919 |access-date= 5 January 2018}}</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 |s2cid = 8342929 |access-date= 5 January 2018}}</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 |s2cid = 53493339 |access-date= 5 January 2018}}</ref>
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== 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|1202}} * {{JPL small body}}
{{Minor planets navigator |1201 Strenua |number=1202 |1203 Nanna}} {{Small Solar System bodies}} {{Authority control}}
{{DEFAULTSORT:Marina}} 001202 Category:Discoveries by Grigory Neujmin Category:Named minor planets 19310913