{{Short description|English}} {{Use dmy dates|date=October 2019}} {{Infobox planet | minorplanet = yes | name = 1167 Dubiago | background = #D6D6D6 | image = | image_size = | caption = | discovery_ref = <ref name="jpldata" /> | discovered = 3 August 1930 | discoverer = E. F. Skvortsov | discovery_site = Simeiz Obs. | mpc_name = (1167) Dubiago | alt_names = 1930 PB{{·}}{{mp|1931 VJ|1}}<br />1938 WW{{·}}1950 QX<br />A924 RF | named_after = Alexander Dubyago<br />{{small|(also spelled: ''Dubiago'')}}<ref name="springer" /> | mp_category = main-belt{{·}}{{small|(outer)}}<ref name="lcdb" /> | orbit_ref = <ref name="jpldata" /> | epoch = 4 September 2017 (JD 2458000.5) | uncertainty = 0 | observation_arc = 86.71 yr (31,671 days) | aphelion = 3.6517 AU | perihelion = 3.1772 AU | semimajor = 3.4145 AU | eccentricity = 0.0695 | period = 6.31 yr (2,305 days) | mean_anomaly = 314.09° | mean_motion = {{Deg2DMS|0.1562|sup=ms}} / day | inclination = 5.7477° | asc_node = 223.39° | arg_peri = 71.344° | dimensions = {{val|63.12|5.6}} km {{small|(IRAS:17)}}<ref name="SIMPS" /><br />{{val|75.79|0.90}} km<ref name="AKARI" /> | rotation = {{val|14.3}} h<ref name="Dahlgren-1991" /><br />{{val|34.8374|0.0990}} h<ref name="Waszczak-2015" /> | albedo = {{val|0.036|0.001}}<ref name="AKARI" /><br />{{val|0.0509|0.010}} {{small|(IRAS:17)}}<ref name="SIMPS" /> | spectral_type = Tholen = D<ref name="jpldata" />{{·}}D<ref name="lcdb" /><br />B–V = 0.743<ref name="jpldata" /><br />U–B = 0.196<ref name="jpldata" /> | abs_magnitude = {{val|9.51|0.29}}<ref name="Veres-2015" />{{·}}{{val|9.513|0.001}} {{small|(R)}}<ref name="Waszczak-2015" />{{·}}9.85<ref name="jpldata" /><ref name="lcdb" /><ref name="SIMPS" /><ref name="AKARI" /> }}
'''1167 Dubiago''', provisional designation {{mp|1930 PB}}, is a dark asteroid from the outer region of the asteroid belt, approximately 63 kilometers in diameter. It was discovered on 3 August 1930, by Soviet astronomer Evgenii Skvortsov at Simeiz Observatory on the Crimean peninsula, and named after astronomer Alexander Dubyago.<ref name="MPC-Dubiago" /><ref name="springer" />
== Classification and orbit ==
''Dubiago'' orbits the Sun in the outer main-belt at a distance of 3.2–3.7 AU once every 6 years and 4 months (2,305 days). Its orbit has an eccentricity of 0.07 and an inclination of 6° with respect to the ecliptic.<ref name="jpldata" /> In 1924, it was first identified as {{mp|A924 RF}} at the discovering observatory. The body's observation arc begins at Yerkes Observatory about two months after its official discovery at Simeiz.<ref name="MPC-Dubiago" />
== Physical characteristics ==
In the Tholen classification, ''Dubiago'' is a D-type asteroid, a group of 46 known bodies, mostly being Jupiter trojans and centaurs such as 10199 Chariklo and 624 Hektor.<ref name="sbdb-D-type" /> It is thought that the Martian moon Phobos has a similar composition, and that the Tagish Lake meteorite origins from a D-type asteroid.
=== Lightcurves ===
In March 1990, a rotational lightcurve of ''Dubiago'' was obtained using the Nordic Optical Telescope at the La Palma site on the Canary Islands. Lightcurve analysis gave a rotation period of 14.3 hours with a brightness variation of 0.23 magnitude ({{small|U=2}}).<ref name="Dahlgren-1991" /> A second lightcurve was obtained in the R-band at the Palomar Transient Factory in October 2013, giving an alternative period solution of 34.8374 hours with an amplitude of 0.21 magnitude ({{small|U=2}}).<ref name="Waszczak-2015" />
=== Diameter and albedo ===
According to the surveys carried out by the Infrared Astronomical Satellite IRAS and the Japanese Akari satellite, ''Dubiago'' measures 63.12 and 75.79 kilometers in diameter, and its surface has an albedo of 0.051 and 0.036, respectively.<ref name="SIMPS" /><ref name="AKARI" /> The ''Collaborative Asteroid Lightcurve Link'' adopts the results obtained by IRAS with an absolute magnitude of 9.85.<ref name="lcdb" />
== Naming ==
This minor planet was named in honor of Alexander Dubyago (1903–1959), a renowned astronomer of the Soviet Union. The lunar crater ''Dubyago'' is also named in his and his father's honour.<ref name="springer" /> The approved naming was suggested by the Russian ''Institute of Theoretical Astronomy'' (ITA) and the official {{MoMP|1167|naming citation}} was published by the Minor Planet Center on 1 June 1967 ({{small|M.P.C. 2740}}).<ref name="DoMP-Circular-dates" />
== References == {{reflist|30em|refs=
<ref name="jpldata">{{cite web |type = 2017-07-05 last obs. |title = JPL Small-Body Database Browser: 1167 Dubiago (1930 PB) |url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001167 |publisher = Jet Propulsion Laboratory |accessdate = 26 July 2017}}</ref>
<ref name="springer">{{cite book |title = Dictionary of Minor Planet Names – (1167) Dubiago |last = Schmadel | first = Lutz D. |publisher = Springer Berlin Heidelberg |page = 98 |date = 2007 |isbn = 978-3-540-00238-3 |doi = 10.1007/978-3-540-29925-7_1168 |chapter = (1167) Dubiago }}</ref>
<ref name="MPC-Dubiago">{{cite web |title = 1167 Dubiago (1930 PB) |work = Minor Planet Center |url = https://www.minorplanetcenter.net/db_search/show_object?object_id=1167 |accessdate = 1 February 2017}}</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="sbdb-D-type">{{cite web |title = JPL Small-Body Database Search: list of D-type minor planets (Tholen/SMASSII) |publisher = Jet Propulsion Laboratory |url = http://ssd.jpl.nasa.gov/sbdb_query.cgi?obj_group=all;obj_kind=all;obj_numbered=all;OBJ_field=0;ORB_field=0;combine_mode=OR;c1_group=OBJ;c1_item=Ay;c1_op=%3D;c1_value=D;c2_group=OBJ;c2_item=Ax;c2_op=%3D;c2_value=D;table_format=HTML;max_rows=100;format_option=comp;c_fields=AcBhBgBjBiBnBsAiArApAxAy;.cgifields=format_option;.cgifields=obj_kind;.cgifields=obj_group;.cgifields=obj_numbered;.cgifields=combine_mode;.cgifields=ast_orbit_class;.cgifields=table_format;.cgifields=com_orbit_class&query=1&c_sort=AcA |accessdate = 5 November 2015}}</ref>
<ref name="lcdb">{{cite LCDB|number = 1167 |accessdate = 1 February 2017}}</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 – IRAS-A-FPA-3-RDR-IMPS-V6.0 |bibcode = 2004PDSS...12.....T |accessdate = 17 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=1167 online], [https://core.ac.uk/download/pdf/43545172.pdf AcuA catalog p. 153])</ref>
<ref name="Dahlgren-1991">{{Cite journal |first1 = M. |last1 = Dahlgren |first2 = C.-I. |last2 = Lagerkvist |first3 = A. |last3 = Fitzsimmons |first4 = I. P. |last4 = Williams |date = May 1991 |title = Differential CCD photometry of Dubiago, Chiron and Hektor |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1991MNRAS.250..115D |journal = Monthly Notices of the Royal Astronomical Society |volume = 250 |pages = 115–118 |issn = 0035-8711 |bibcode = 1991MNRAS.250..115D |doi = 10.1093/mnras/250.1.115 |access-date= 1 February 2017|doi-access= free }}</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= 1 February 2017}}</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= 1 February 2017}}</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|1167}} * {{JPL small body}}
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{{DEFAULTSORT:Dubiago}} 001167 Category:Discoveries by Evgenii Skvortsov Category:Named minor planets 001167 19300803