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{{Infobox planet
#REDIRECT [[List of minor planets: 2001–3000#085]]
| minorplanet = yes
| name = 2085 Henan
| background = #D6D6D6
| image =
| image_size =
| caption =
| discovery_ref = &thinsp;<ref name="jpldata" />
| discoverer = [[Purple Mountain Observatory|Purple Mountain Obs.]]
| discovery_site = [[Purple Mountain Observatory|Purple Mountain Obs.]]
| discovered = 20 December 1965
| mpc_name = (2085) Henan
| alt_names = 1965 YA{{·}}1933 RE<br />1938 WR{{·}}1949 FL<br />{{mp|1949 FP|1}}{{·}}1962 CL<br />1963 KA{{·}}{{mp|1969 VA|1}}<br />{{mp|1971 BG|1}}{{·}}1972 LX<br />{{mp|1973 QX|1}}{{·}}{{mp|1976 GR|7}}
| pronounced =
| named_after = [[Henan]] {{small|(Province of China)}}<ref name="springer" />
| mp_category = [[main-belt]]{{·}}{{small|([[Kirkwood gap|outer]])}}<br />[[Henan family|Henan]]&thinsp;<ref name="Ferret" />
| orbit_ref = &thinsp;<ref name="jpldata" />
| epoch = 4 September 2017 ([[Julian day|JD]] 2458000.5)
| uncertainty = 0
| observation_arc = 68.61 yr (25,060 days)
| aphelion = 2.9312 [[Astronomical unit|AU]]
| perihelion = 2.4654 AU
| semimajor = 2.6983 AU
| eccentricity = 0.0863
| period = 4.43 [[Julian year (astronomy)|yr]] (1,619 days)
| mean_anomaly = 276.34[[Degree (angle)|°]]
| mean_motion = {{Deg2DMS|0.2224|sup=ms}} / day
| inclination = 3.8343°
| asc_node = 118.14°
| arg_peri = 294.54°
| dimensions = {{val|13.356|0.036}} km<ref name="Masiero-2014" /><br />13.67 km {{small|(calculated)}}<ref name="lcdb" /><br />{{val|13.941|0.082}} km<ref name="WISE" /><br />{{val|16.56|4.50}} km<ref name="Nugent-2016" /><br />{{val|17.61|0.32}} km<ref name="Masiero-2012" /><br />18 km<ref name="Nesvorny-2014" />{{rp|23}}<br />{{val|18.34|1.20}} km<ref name="AKARI" />
| rotation = {{val|24}} [[Hour|h]]<ref name="geneva-obs" /><br />{{val|110|1}} h<ref name="Devogele-2017" />
| albedo = {{val|0.10|0.08}}<ref name="Nugent-2016" /><br />{{val|0.131|0.019}}<ref name="Masiero-2012" /><br />{{val|0.145|0.020}}<ref name="AKARI" /><br />0.18 {{small|(assumed)}}<ref name="lcdb" /><br />{{val|0.2510|0.0408}}<ref name="WISE" />
| spectral_type = [[SMASS classification|SMASS]] {{=}} [[L-type asteroid|L]]&thinsp;<ref name="jpldata" /><ref name="lcdb" /><br />[[L-type asteroid|L]] {{small|(Bus–DeMeo)}}<ref name="Devogele-2017" />
| abs_magnitude = 11.40<ref name="WISE" /><ref name="AKARI" />{{·}}{{val|11.55|0.48}}<ref name="Veres-2015" />{{·}}11.60<ref name="Masiero-2012" />{{·}}11.8<ref name="lcdb" />{{·}}11.9<ref name="jpldata" />{{·}}12.12<ref name="Nugent-2016" />
}}


'''2085 Henan''', provisional designation {{mpf|1965 YA}}, is a potentially slow rotating [[asteroid]] and parent body of the [[Henan family]] from the central regions of the [[asteroid belt]], approximately 15 kilometers in diameter. It was discovered on 20 December 1965, by astronomers at the the [[Purple Mountain Observatory]] in Nanking, China.<ref name="MPC-object" /> The asteroid was named for the [[Henan Province]] in China.<ref name="springer" />
{{NASTRO comment}}


== Orbit and classification ==
{{DEFAULTSORT:002085}}

[[Category:Henan asteroids]]
''Henan'' is the [[parent body]] of the [[Henan family]] ({{small|[[FIN tbl#532|532]]}}),<ref name="Ferret" /> a large [[asteroid family|family]] of [[L-type asteroid]]s in the intermediate main-belt, which can be further divided into four distinct families.<ref name="Nesvorny-2014" />{{rp|23}}
[[Category:Discoveries by the Purple Mountain Observatory]]

[[Category:Minor planets named for places|Henan]]
It orbits the Sun in the [[Kirkwood gap|central]] asteroid belt at a distance of 2.5–2.9&nbsp;[[Astronomical unit|AU]] once every 4 years and 5 months (1,619 days; [[semi-major axis]] of 2.70&nbsp;AU). Its orbit has an [[orbital eccentricity|eccentricity]] of 0.09 and an [[orbital inclination|inclination]] of 4[[Degree (angle)|°]] with respect to the [[ecliptic]].<ref name="jpldata" />
[[Category:Named minor planets|Henan]]

[[Category:L-type asteroids (SMASS)]]
The asteroid A first observation of this asteroid was found on a [[precovery]], taken at [[Lowell Observatory]] in July 1906. The body's [[observation arc]] begins at [[Goethe Link Observatory]] in July 1943, more than 22 years prior to its official discovery observation at Purple Mountain.<ref name="MPC-object" />

== Physical characteristics ==

In the Bus–DeMeo and [[SMASS classification]], ''Henan'' is an uncommon [[L-type asteroid]],<ref name="jpldata" /><ref name="lcdb" /><ref name="Devogele-2017" />{{rp|5}} which is also the overall [[Asteroid spectral type|spectral type]] for members of the [[Henan family]].<ref name="Nesvorny-2014" />{{rp|23}}

=== Rotation period ===

As of 2017, no secure rotational [[lightcurve]] of ''Henan'' has been obtained. In September 2004, observations by [[Laurent Bernasconi]] gave a [[rotation period]] of 24 hours with a brightness variation of 0.25 [[Magnitude (astronomy)|magnitude]] ({{small|[[LCDB quality code|U=1]]}}).<ref name="geneva-obs" /> In February 2015, photometric observations of ''Henan'' by an international collaboration of astronomers gave a tentative synodic period of {{val|110|1}} hours and an amplitude of 0.4 magnitude, which would make it a potentially [[List of slow rotators (minor planets)|slow rotator]]({{small|[[LCDB quality code|U=1]]}}).<ref name="Devogele-2017" /> An alternative period solution gave 94 hours. The latter study selected ''Henan'' because it is a suspected "Barbarian" asteroid (named after [[234&nbsp;Barbara]]) which polarimetric properties suggest that they have an unusual shape and topographic features with large concave areas.<ref name="Devogele-2017" />

=== Diameter and albedo ===

According to the surveys carried out by the Japanese [[Akari (satellite)|Akari satellite]] and the [[NEOWISE]] mission of NASA's [[Wide-field Infrared Survey Explorer]], ''Henan'' measures between 13.356 and 18.34 kilometers in diameter and its surface has an [[astronomical albedo|albedo]] between 0.10 and 0.2510.<ref name="Masiero-2014" /><ref name="WISE" /><ref name="Nugent-2016" /><ref name="Masiero-2012" /><ref name="AKARI" />

The ''Collaborative Asteroid Lightcurve Link'' assumes an albedo of 0.18 and calculates a diameter of 13.67 kilometers based on an [[absolute magnitude]] of 11.8.<ref name="lcdb" />

== Naming ==

This [[minor planet]] was named after the [[Henan Province]] in the People's Republic of China, located in the central part of the country along the lower stretch of the [[Yellow River]], which is considered the cradle of civilization in ancient China.<ref name="springer" /> The official naming citation was published by the [[Minor Planet Center]] on 1 February 1980 ({{small|[[Minor Planet Circulars|M.P.C.]] 5184}}).<ref name="MPC-Circulars-Archive" />

== References ==
{{reflist|30em|refs=

<ref name="jpldata">{{cite web
|type = 2017-11-02 last obs.
|title = JPL Small-Body Database Browser: 2085 Henan (1965 YA)
|url = http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2002085
|publisher = [[Jet Propulsion Laboratory]]
|accessdate = 18 November 2017}}</ref>

<ref name="springer">{{cite book
|title = Dictionary of Minor Planet Names – (2085) Henan
|last = Schmadel | first = Lutz D.
|publisher = [[Springer Berlin Heidelberg]]
|page = 169
|date = 2007
|url = https://link.springer.com/referenceworkentry/10.1007/978-3-540-29925-7_2086
|isbn = 978-3-540-00238-3
|accessdate = 18 November 2017}}</ref>

<ref name="MPC-object">{{cite web
|title = 2085 Henan (1965 YA)
|work = Minor Planet Center
|url = http://www.minorplanetcenter.net/db_search/show_object?object_id=2085
|accessdate = 18 November 2017}}</ref>

<ref name="MPC-Circulars-Archive">{{cite web
|title = MPC/MPO/MPS Archive
|work = Minor Planet Center
|url = http://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html
|accessdate = 18 November 2017}}</ref>

<ref name="geneva-obs">{{cite web
|title = Asteroids and comets rotation curves – (2085) Henan
|last = Behrend |first = Raoul
|publisher = Geneva Observatory
|url = http://obswww.unige.ch/~behrend/page4cou.html#002085
|accessdate = 18 November 2017}}</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 = https://arxiv.org/pdf/1406.6645.pdf
|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= 18 November 2017}}</ref>

<ref name="Ferret">{{cite web
|title = Small Bodies Data Ferret
|work = Nesvorny HCM Asteroid Families V3.0
|url = https://sbntools.psi.edu/ferret/PropertySearch/familyForm.action
|accessdate = 18 November 2017}}</ref>

<ref name="Nesvorny-2014">{{Cite journal
|first1 = D. |last1 = Nesvorný
|first2 = M. |last2 = Broz
|first3 = V. |last3 = Carruba
|date = December 2014
|title = Identification and Dynamical Properties of Asteroid Families
|url = https://arxiv.org/pdf/1502.01628.pdf
|journal = Asteroids IV
|pages = 297–321
|bibcode = 2015aste.book..297N
|doi = 10.2458/azu_uapress_9780816532131-ch016
|arxiv = 1502.01628
|access-date= 18 November 2017}}</ref>

<ref name="lcdb">{{cite web
|title = LCDB Data for (2085) Henan
|publisher = Asteroid Lightcurve Database (LCDB)
|url = http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=2085%7CHenan
|accessdate = 18 November 2017}}</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= 18 November 2017}}</ref>

<ref name="Nugent-2016">{{cite journal
|display-authors = 6
|first1 = C. R. |last1 = Nugent
|first2 = A. |last2 = Mainzer
|first3 = J. |last3 = Bauer
|first4 = R. M. |last4 = Cutri
|first5 = E. A. |last5 = Kramer
|first6 = T. |last6 = Grav
|first7 = J. |last7 = Masiero
|first8 = S. |last8 = Sonnett
|first9 = E. L. |last9 = Wright
|date = September 2016
|title = NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos
|url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2016AJ....152...63N
|journal = The Astronomical Journal
|volume = 152
|issue = 3
|page = 12
|bibcode = 2016AJ....152...63N
|doi = 10.3847/0004-6256/152/3/63
|arxiv = 1606.08923
|access-date= 18 November 2017}}</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
|url = http://pasj.oxfordjournals.org/content/63/5/1117.full.pdf+html
|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
|access-date= 18 November 2017}}</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
|url = http://arxiv.org/pdf/1109.6407v1.pdf
|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
|access-date= 18 November 2017}}</ref>

<ref name="Devogele-2017">{{Cite journal
|display-authors = 6
|first1 = |last1 = Devogè
|first2 = M. |last2 = le
|first3 = P. |last3 = Tanga
|first4 = P. |last4 = Bendjoya
|first5 = J. P. |last5 = Rivet
|first6 = J. |last6 = Surdej
|first7 = J. |last7 = Hanus
|first8 = L. |last8 = Abe
|first9 = P. |last9 = Antonini
|first10 = R. A. |last10 = Artola
|first11 = M. |last11 = Audejean
|first12 = R. |last12 = Behrend
|first13 = F. |last13 = Berski
|first14 = J. G. |last14 = Bosch
|first15 = M. |last15 = Bronikowska
|first16 = A. |last16 = Carbognani
|first17 = F. |last17 = Char
|first18 = M.-J. |last18 = Kim
|first19 = Y.-J. |last19 = Choi
|first20 = C. A. |last20 = Colazo
|first21 = J. |last21 = Coloma
|first22 = D. |last22 = Coward
|first23 = R. |last23 = Durkee
|first24 = O. |last24 = Erece
|first25 = E. |last25 = Forne
|first26 = P. |last26 = Hickson
|first27 = R. |last27 = Hirsch
|first28 = J. |last28 = Horbowicz
|first29 = K. |last29 = Kaminski
|first30 = P. |last30 = Kankiewicz
|first31 = M. |last31 = Kaplan
|first32 = T. |last32 = Kwiatkowski
|first33 = I. |last33 = Konstanciak
|first34 = A. |last34 = Kruszewki
|first35 = V. |last35 = Kudak
|first36 = F. |last36 = Manzini
|first37 = H.-K. |last37 = Moon
|first38 = A. |last38 = Marciniak
|first39 = M. |last39 = Murawiecka
|first40 = J. |last40 = Nadolny
|first41 = W. |last41 = Ogloza
|first42 = J. L |last42 = Ortiz
|first43 = D. |last43 = Oszkiewicz
|first44 = H. |last44 = Pallares
|first45 = N. |last45 = Peixinho
|first46 = R. |last46 = Poncy
|first47 = F. |last47 = Reyes
|first48 = J. A. |last48 = de los Reyes
|first49 = T. |last49 = Santana-Ros
|first50 = K. |last50 = Sobkowiak
|first51 = S. |last51 = Pastor
|first52 = F. |last52 = Pilcher
|first53 = |last53 = Quiñ
|first54 = M. C. |last54 = ones
|first55 = P. |last55 = Trela
|first56 = D. |last56 = Vernet
|date = July 2017
|title = Shape and spin determination of Barbarian asteroids
|url = https://arxiv.org/pdf/1707.07503.pdf
|journal = eprint arXiv:1707.07503
|bibcode = 2017arXiv170707503D
|arxiv = 1707.07503
|access-date= 18 November 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= 18 November 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])
* [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
* [http://www.minorplanetcenter.net/iau/lists/NumberedMPs000001.html Discovery Circumstances: Numbered Minor Planets (1)-(5000)] – Minor Planet Center
* {{JPL small body}}

{{Minor planets navigator |1098 Hakone |number=1099 |1100 Arnica}}
{{Small Solar System bodies}}

{{DEFAULTSORT:Henan}}
[[Category:Henan asteroids|002085]]
[[Category:Numbered minor planets|002085]]
[[Category:Discoveries by the Purple Mountain Observatory|002085]]
[[Category:Minor planets named for places]]
[[Category:Named minor planets]]
[[Category:L-type asteroids (SMASS)|002085]]
[[Category:Astronomical objects discovered in 1965|19651220]]
[[Category:Astronomical objects discovered in 1965|19651220]]
[[Category:Minor planet redirects|2085 Henan]]

Revision as of 12:36, 18 November 2017

2085 Henan
Discovery [1]
Discovered byPurple Mountain Obs.
Discovery sitePurple Mountain Obs.
Discovery date20 December 1965
Designations
(2085) Henan
Named after
Henan (Province of China)[2]
1965 YA · 1933 RE
1938 WR · 1949 FL
1949 FP1 · 1962 CL
1963 KA · 1969 VA1
1971 BG1 · 1972 LX
1973 QX1 · 1976 GR7
main-belt · (outer)
Henan [3]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc68.61 yr (25,060 days)
Aphelion2.9312 AU
Perihelion2.4654 AU
2.6983 AU
Eccentricity0.0863
4.43 yr (1,619 days)
276.34°
0° 13m 20.64s / day
Inclination3.8343°
118.14°
294.54°
Physical characteristics
Dimensions13.356±0.036 km[4]
13.67 km (calculated)[5]
13.941±0.082 km[6]
16.56±4.50 km[7]
17.61±0.32 km[8]
18 km[9]: 23 
18.34±1.20 km[10]
24 h[11]
110±1 h[12]
0.10±0.08[7]
0.131±0.019[8]
0.145±0.020[10]
0.18 (assumed)[5]
0.2510±0.0408[6]
SMASS = L [1][5]
L (Bus–DeMeo)[12]
11.40[6][10] · 11.55±0.48[13] · 11.60[8] · 11.8[5] · 11.9[1] · 12.12[7]

2085 Henan, provisional designation 1965 YA, is a potentially slow rotating asteroid and parent body of the Henan family from the central regions of the asteroid belt, approximately 15 kilometers in diameter. It was discovered on 20 December 1965, by astronomers at the the Purple Mountain Observatory in Nanking, China.[14] The asteroid was named for the Henan Province in China.[2]

Orbit and classification

Henan is the parent body of the Henan family (532),[3] a large family of L-type asteroids in the intermediate main-belt, which can be further divided into four distinct families.[9]: 23 

It orbits the Sun in the central asteroid belt at a distance of 2.5–2.9 AU once every 4 years and 5 months (1,619 days; semi-major axis of 2.70 AU). Its orbit has an eccentricity of 0.09 and an inclination of 4° with respect to the ecliptic.[1]

The asteroid A first observation of this asteroid was found on a precovery, taken at Lowell Observatory in July 1906. The body's observation arc begins at Goethe Link Observatory in July 1943, more than 22 years prior to its official discovery observation at Purple Mountain.[14]

Physical characteristics

In the Bus–DeMeo and SMASS classification, Henan is an uncommon L-type asteroid,[1][5][12]: 5  which is also the overall spectral type for members of the Henan family.[9]: 23 

Rotation period

As of 2017, no secure rotational lightcurve of Henan has been obtained. In September 2004, observations by Laurent Bernasconi gave a rotation period of 24 hours with a brightness variation of 0.25 magnitude (U=1).[11] In February 2015, photometric observations of Henan by an international collaboration of astronomers gave a tentative synodic period of 110±1 hours and an amplitude of 0.4 magnitude, which would make it a potentially slow rotator(U=1).[12] An alternative period solution gave 94 hours. The latter study selected Henan because it is a suspected "Barbarian" asteroid (named after 234 Barbara) which polarimetric properties suggest that they have an unusual shape and topographic features with large concave areas.[12]

Diameter and albedo

According to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Henan measures between 13.356 and 18.34 kilometers in diameter and its surface has an albedo between 0.10 and 0.2510.[4][6][7][8][10]

The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.18 and calculates a diameter of 13.67 kilometers based on an absolute magnitude of 11.8.[5]

Naming

This minor planet was named after the Henan Province in the People's Republic of China, located in the central part of the country along the lower stretch of the Yellow River, which is considered the cradle of civilization in ancient China.[2] The official naming citation was published by the Minor Planet Center on 1 February 1980 (M.P.C. 5184).[15]

References

  1. ^ a b c d e f "JPL Small-Body Database Browser: 2085 Henan (1965 YA)" (2017-11-02 last obs.). Jet Propulsion Laboratory. Retrieved 18 November 2017.
  2. ^ a b c Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (2085) Henan. Springer Berlin Heidelberg. p. 169. ISBN 978-3-540-00238-3. Retrieved 18 November 2017.
  3. ^ a b "Small Bodies Data Ferret". Nesvorny HCM Asteroid Families V3.0. Retrieved 18 November 2017.
  4. ^ a b Masiero, Joseph R.; Grav, T.; Mainzer, A. K.; Nugent, C. R.; Bauer, J. M.; Stevenson, R.; et al. (August 2014). "Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos" (PDF). The Astrophysical Journal. 791 (2): 11. arXiv:1406.6645. Bibcode:2014ApJ...791..121M. doi:10.1088/0004-637X/791/2/121. Retrieved 18 November 2017.
  5. ^ a b c d e f "LCDB Data for (2085) Henan". Asteroid Lightcurve Database (LCDB). Retrieved 18 November 2017.
  6. ^ a b c d Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results" (PDF). The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved 18 November 2017.
  7. ^ a b c d Nugent, C. R.; Mainzer, A.; Bauer, J.; Cutri, R. M.; Kramer, E. A.; Grav, T.; et al. (September 2016). "NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos". The Astronomical Journal. 152 (3): 12. arXiv:1606.08923. Bibcode:2016AJ....152...63N. doi:10.3847/0004-6256/152/3/63. Retrieved 18 November 2017.{{cite journal}}: CS1 maint: unflagged free DOI (link)
  8. ^ a b c d Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C.; et al. (November 2012). "Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids". The Astrophysical Journal Letters. 759 (1): 5. arXiv:1209.5794. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved 18 November 2017.
  9. ^ a b c Nesvorný, D.; Broz, M.; Carruba, V. (December 2014). "Identification and Dynamical Properties of Asteroid Families" (PDF). Asteroids IV: 297–321. arXiv:1502.01628. Bibcode:2015aste.book..297N. doi:10.2458/azu_uapress_9780816532131-ch016. Retrieved 18 November 2017.
  10. ^ a b c d Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. Retrieved 18 November 2017.
  11. ^ a b Behrend, Raoul. "Asteroids and comets rotation curves – (2085) Henan". Geneva Observatory. Retrieved 18 November 2017.
  12. ^ a b c d e Devogè; le, M.; Tanga, P.; Bendjoya, P.; Rivet, J. P.; Surdej, J.; et al. (July 2017). "Shape and spin determination of Barbarian asteroids" (PDF). eprint arXiv:1707.07503. arXiv:1707.07503. Bibcode:2017arXiv170707503D. Retrieved 18 November 2017.
  13. ^ Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus. 261: 34–47. arXiv:1506.00762. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 18 November 2017.
  14. ^ a b "2085 Henan (1965 YA)". Minor Planet Center. Retrieved 18 November 2017.
  15. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 18 November 2017.
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