View source for 877 Walküre

{{Short description|Main-belt asteroid}}
{{Use dmy dates|date=February 2020}}
{{Infobox planet
| minorplanet     = yes
| name            = 877 Walküre
| background      = #D6D6D6
| image           = 000877-asteroid shape model (877) Walküre.png
| image_scale      =
| caption         = Modelled shape of ''Walküre'' from its [[lightcurve]]
| discovery_ref   = <ref name="MPC-object" />
| discoverer      = [[Grigory Neujmin|G. Neujmin]]
| discovery_site  = [[Simeiz Observatory|Simeiz Obs.]]
| discovered      = 13 September 1915
| mpc_name        = (877) Walküre
| alt_names       = A915 RV{{·}}1909 GC<br />A909 GC{{·}}1915 Σ7<br />1915 S7
| pronounced      =
| named_after     = [[Valkyrie]] (mythology) and ''[[Die Walküre]]'' (opera)<ref name="springer" />
| mp_category     = {{plainlist|
* [[main-belt]]<ref name="MPC-object" /><ref name="jpldata" />{{·}}{{small|([[Kirkwood gap|inner]])}}
* [[Background asteroid|background]]<ref name="AstDys-object" /><ref name="Ferret" />}}
| orbit_ref       = <ref name="jpldata" />
| epoch           = 31 May 2020 ([[Julian day|JD]] 2459000.5)
| uncertainty     = 0
| observation_arc = 98.94 [[Julian year (astronomy)|yr]] (36,137 d)
| aphelion        = 2.8854 [[Astronomical unit|AU]]
| perihelion      = 2.0877 AU
| semimajor       = 2.4866 AU
| eccentricity    = 0.1604
| period          = 3.92 yr (1,432 d)
| mean_anomaly    = 222.78[[Degree (angle)|°]]
| mean_motion     = {{Deg2DMS|0.2514|sup=ms}} / day
| inclination     = 4.2555°
| asc_node        = 116.38°
| arg_peri        = 275.82°
| mean_diameter   = {{plainlist|
* {{val|34.79|8.41|ul=km}}<ref name="Nugent-2016" />
* {{val|38.41|1.4|u=km}}<ref name="SIMPS" />
* {{val|39.93|0.51|u=km}}<ref name="AKARI" />}}
| rotation        = {{val|17.424|0.004|ul=h}}<ref name="Lin-2011" />
| pole_ecliptic_lat= {{plainlist|
* (68.0°, 58.0°) (λ<sub>1</sub>/β<sub>1</sub>)<ref name="Ferret" />
* {{nowrap|(253.0°, 61.0°) (λ<sub>2</sub>/β<sub>2</sub>)<ref name="Ferret" />}}}}
| albedo          = {{plainlist|
* {{val|0.05|0.03}}<ref name="Nugent-2016" />
* {{val|0.058|0.002}}<ref name="AKARI" />
* {{val|0.0623|0.005}}<ref name="SIMPS" />}}
| spectral_type   = {{plainlist|
* [[Tholen classification|Tholen]] {{=}} [[F-type asteroid|F]]<ref name="jpldata" />
* [[C-type asteroid|C]]0 {{small|(Barucci)}}<ref name="lcdb" />
* [[C-type asteroid|C]] {{small|([[Sloan Digital Sky Survey|SDSS]]-MOC)}}<ref name="SDSS-Taxonomy" />
* [[Asteroid color indices|B–V]] {{=}} {{val|0.636|0.034}}<ref name="jpldata" />
* [[Asteroid color indices|U–B]] {{=}} {{val|0.250|0.049}}<ref name="jpldata" />}}
| abs_magnitude   = 10.9<ref name="MPC-object" /><ref name="jpldata" />
}}
'''877 Walküre''' ([[Minor planet provisional designation|''prov. designation'']]: {{mp|A915 RV}} ''or'' [[Provisional designation in astronomy#Temporary minor planet designations|{{mp|1915 Σ7}}]]) is a dark [[background asteroid]] from the inner regions of the [[asteroid belt]], approximately {{convert|38|km|mi|abbr=off|sigfig=2|sp=us}} in diameter. It was discovered on 13 September 1915, by Russian astronomer [[Grigory Neujmin]] at the [[Simeiz Observatory]] on the Crimean peninsula.<ref name="MPC-object" /> The carbonaceous [[F-type asteroid|F]]/[[C-type asteroid]] has a [[rotation period]] of 17.4 hours and is likely elongated in shape. It was named after the female spirit [[Valkyrie]] from [[Norse mythology]], best known from Wagner's opera ''[[Die Walküre]]''.<ref name="springer" />
== Orbit and classification ==
Located in or near the orbital region of the [[Nysa family]],<ref name="lcdb" /> ''Walküre'' is a non-[[Asteroid family|family]] asteroid of the main belt's [[Background asteroid|background population]] when applying the [[hierarchical clustering method]] to its [[proper orbital elements]].<ref name="AstDys-object" /><ref name="Ferret" /> It orbits the Sun in the [[Kirkwood gap|inner]] asteroid belt at a distance of 2.1–2.9&nbsp;[[Astronomical unit|AU]] once every 3 years and 11 months (1,432 days; [[semi-major axis]] of 2.49&nbsp;AU). Its orbit has an [[orbital eccentricity|eccentricity]] of 0.16 and an [[orbital inclination|inclination]] of 4[[Degree (angle)|°]] with respect to the [[ecliptic]].<ref name="jpldata" /> The asteroid was first observed as {{mp|A909 GC}} ({{mp|1909 GC}}) at [[Heidelberg Observatory]] on 9 April 1909, where the body's [[observation arc]] begins on 25 February 1921, more than 5 years after its official discovery observation at [[Simeiz Observatory|Simeiz]] on 13 September 1915.<ref name="MPC-object" />
== Naming ==
This [[minor planet]] was named after the [[Valkyrie]] ({{langx|de|Walküre|link=no}}) a female spirit from [[Norse mythology]]. The shield-bearing valkyries decide the fate of warriors in battle, and conduct some of them to [[Valhalla]], the afterlife hall where the fallen heroes are received. ''[[Die Walküre]]'' (''The Valkyrie'') is also part of the opera cycle ''[[Der Ring des Nibelungen]]'' by [[Richard Wagner]] (1813–1883), the others being ''[[The Rhinegold]]'', ''[[Siegfried (opera)|Siegfried]]'' and the ''[[Twilight of the Gods (opera)|Twilight of the Gods]]''. The asteroid was named by astronomer [[Sergey Belyavsky]] and the {{MoMP|877|naming}} was published in the journal ''[[Astronomische Nachrichten]]'' in 1923 ({{small|[[Astronomische Nachrichten|AN]] 219, 401}}). Asteroids [[894&nbsp;Erda]] and [[890&nbsp;Waltraut]] are also named after characters in Wagner's ''Ring'', while [[3992&nbsp;Wagner]] and [[1260&nbsp;Walhalla]] are named after the composer and the [[Walhalla memorial]] hall of fame, respectively.
== Physical characteristics ==
In the [[Tholen classification]], ''Walküre'' is a dark, carbonaceous [[F-type asteroid]],<ref name="jpldata" /> while in the [[Sloan Digital Sky Survey|SDSS]]-based taxonomy and in the Barucci-taxonomy, it is a common carbonaceous [[C-type asteroid|C-type]] and C0-type asteroid, respectively.<ref name="Ferret" /><ref name="SDSS-Taxonomy" />
=== Rotation period ===
In February 2011, a rotational [[lightcurve]] of ''Walküre'' was obtained from [[Photometry (astronomy)|photometric]] observations by astronomer Li Bin at the XuYi Station {{Obscode|D29}} of the [[Purple Mountain Observatory]] in China. Lightcurve analysis gave a [[rotation period]] of {{val|17.424|0.004}} hours with a brightness variation of {{val|0.44|0.03}} [[Magnitude (astronomy)|magnitude]], indicative of an elongated shape ({{small|[[LCDB quality code|U=3−]]}}).<ref name="Lin-2011" /> The result supersedes observations by [[Richard P. Binzel|Richard Binzel]] (1982) and [[René Roy (astronomer)|René Roy]] (2005), who determined a period of {{val|17.49}} and {{val|17.44|0.02}} with an amplitude of {{val|0.40}} and {{val|0.33|0.01}} magnitude, respectively ({{small|[[LCDB quality code|U=2/2]]}}).<ref name="geneva-obs" /><ref name="Binzel-1987" /><ref name="lcdb" />
=== Poles ===
Two lightcurves, published in 2016, using modeled photometric data from the Lowell Photometric Database (LPD) and other sources, gave a concurring sidereal period of {{val|17.4217|0.0001}} and {{val|17.4217|0.0005}} hours, respectively. Each modeled lightcurve also determined two [[Poles of astronomical bodies|spin axes]] of (68.0°, 58.0°) and (253.0°, 61.0°), as well as (262.0°, 71.0°) and (47.0°, 66.0°) in [[Ecliptic coordinate system|ecliptic coordinates]] (λ,β).<ref name="Ferret" /><ref name="Durech-2016" /><ref name="Hanus-2016a" />
=== Diameter and albedo ===
According to the surveys carried out by the [[NEOWISE]] mission of NASA's [[Wide-field Infrared Survey Explorer]] (WISE), the Japanese [[Akari (satellite)|Akari satellite]], and the Infrared Astronomical Satellite [[IRAS]], ''Walküre'' measures ({{val|34.79|8.41}}), ({{val|38.41|1.4}}) and ({{val|39.93|0.51}}) kilometers in diameter and its surface has an [[astronomical albedo|albedo]] of ({{val|0.05|0.03}}), ({{val|0.0623|0.005}}) and ({{val|0.058|0.002}}), respectively.<ref name="Nugent-2016" /><ref name="SIMPS" /><ref name="AKARI" /> The ''Collaborative Asteroid Lightcurve Link'' derives an albedo of 0.0634 and gives a diameter of 38.41 kilometers (identical to IRAS) based on an [[absolute magnitude]] of 10.69.<ref name="lcdb" /> Alternative mean-diameter measurements published by the WISE team include ({{val|37.34|9.49|u=km}}) and ({{val|42.553|15.236|u=km}}) with corresponding albedos of ({{val|0.05|0.02}}) and ({{val|0.037|0.020}}).<ref name="Ferret" /><ref name="lcdb" />
== References ==
{{reflist|30em|refs=
<ref name="jpldata">{{cite web
|type       = 2020-02-03 last obs.
|title      = JPL Small-Body Database Browser: 877 Walkure (A915 RV)
|url        = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2000877
|publisher  = [[Jet Propulsion Laboratory]]
|access-date = 28 February 2020}}</ref>
<ref name="springer">{{cite book
|title      = Dictionary of Minor Planet Names
|url      = https://archive.org/details/dictionaryminorp00schm
|url-access = limited
|last       = Schmadel | first = Lutz D.
|publisher  = Springer Berlin Heidelberg
|chapter    = (877) Walküre
|page       = [https://archive.org/details/dictionaryminorp00schm/page/n92 79]
|date       = 2007
|doi        = 10.1007/978-3-540-29925-7_878
|isbn       = 978-3-540-00238-3}}</ref>
<ref name="MPC-object">{{cite web
|title      = 877 Walkure (A915 RV)
|work       = Minor Planet Center
|url        = https://www.minorplanetcenter.net/db_search/show_object?object_id=877
|access-date = 28 February 2020}}</ref>
<ref name="geneva-obs">{{cite web
|title      = Asteroids and comets rotation curves – (877) Walküre
|last       = Behrend |first = Raoul
|publisher  = [[Geneva Observatory]]
|url        = http://obswww.unige.ch/~behrend/page3cou.html#000877
|access-date = 28 February 2020}}</ref>
<ref name="Nugent-2016">{{cite journal
|display-authors = 6
|last1      = Nugent |first1 = C. R.
|last2      = Mainzer |first2 = A.
|last3      = Bauer |first3 = J.
|last4      = Cutri |first4 = R. M.
|last5      = Kramer |first5 = E. A.
|last6      = Grav |first6 = T.
|last7      = Masiero |first7 = J.
|last8      = Sonnett |first8 = S.
|last9      = Wright |first9 = E. L.
|date       = September 2016
|title      = NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos
|journal    = The Astronomical Journal
|volume     = 152
|issue      = 3
|page       = 63
|bibcode    = 2016AJ....152...63N
|issn       = 0004-6256
|doi        = 10.3847/0004-6256/152/3/63
|arxiv      = 1606.08923 |doi-access = free }}</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=877 online], [https://core.ac.uk/download/pdf/43545172.pdf AcuA catalog p. 153])</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
|access-date = 28 February 2020}}</ref>
<ref name="lcdb">{{cite web
|title      = LCDB Data for (877) Walküre
|publisher  = Asteroid Lightcurve Database (LCDB)
|url        = http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=877
|access-date = 28 February 2020}}</ref>
<ref name="Lin-2011">{{cite journal
|last1      = Bin |first1 = Li
|last2      = Haibin |first2 = Zhao
|last3      = Jingshen |first3 = Yao
|date       = October 2011
|title      = Lightcurve Analysis of Five Asteroids
|journal    = Minor Planet Bulletin
|url        = http://www.minorplanet.info/MPB/issues/MPB_45-4.pdf
|volume     = 45
|issue      = 4
|pages      = 179–180
|bibcode = 2011MPBu...38..179L
|access-date = 28 February 2020}}</ref>
<ref name="Binzel-1987">{{cite journal
|last1      = Binzel |first1 = R. P.
|date       = October 1987
|title      = A photoelectric survey of 130 asteroids
|journal    = Icarus
|volume     = 72
|issue      = 1
|pages      = 135–208
|bibcode    = 1987Icar...72..135B
|issn       = 0019-1035
|doi        = 10.1016/0019-1035(87)90125-4}}</ref>
<ref name="Ferret">{{cite web
|title      = Asteroid 877 Walkure
|work       = Small Bodies Data Ferret
|url        = https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=877+Walkure
|access-date = 28 February 2020}}</ref>
<ref name="AstDys-object">{{cite web
|title      = Asteroid 877 Walkure – Proper Elements
|publisher  = AstDyS-2, Asteroids – Dynamic Site
|url        = https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=877
|access-date= 28 February 2020}}</ref>
<ref name="SDSS-Taxonomy">{{Cite journal
|first1     = J. M. |last1 = Carvano
|first2     = P. H. |last2 = Hasselmann
|first3     = D. |last3 = Lazzaro
|first4     = T. |last4 = Mothé-Diniz
|date       = February 2010
|title      = SDSS-based taxonomic classification and orbital distribution of main belt asteroids
|url        = https://sbnarchive.psi.edu/pds3/non_mission/EAR_A_I0035_5_SDSSTAX_V1_1/data/sdsstax_ast_table.tab
|journal    = Astronomy and Astrophysics
|volume     = 510
|page       = 12
|bibcode    = 2010A&A...510A..43C
|doi        = 10.1051/0004-6361/200913322
|access-date= 30 October 2019|doi-access= free
}} [https://sbn.psi.edu/pds/resource/sdsstax.html (PDS data set)]</ref>
<ref name="Durech-2016">{{cite journal
|last1      = Ďurech |first1 = J.
|last2      = Hanuš |first2 = J.
|last3      = Oszkiewicz |first3 = D.
|last4      = Vančo |first4 = R.
|date       = March 2016
|title      = Asteroid models from the Lowell photometric database
|journal    = Astronomy and Astrophysics
|volume     = 587
|page       = A48
|doi = 10.1051/0004-6361/201527573
|bibcode    = 2016A&A...587A..48D
|issn       = 0004-6361
|arxiv      = 1601.02909|s2cid = 118427201
}}</ref>
<ref name="Hanus-2016a">{{cite journal
|display-authors = 6
|last1      = Hanuš |first1 = J.
|last2      = Ďurech |first2 = J.
|last3      = Oszkiewicz |first3 = D. A.
|last4      = Behrend |first4 = R.
|last5      = Carry |first5 = B.
|last6      = Delbo |first6 = M.
|last7      = Adam |first7 = O.
|last8      = Afonina |first8 = V.
|last9      = Anquetin |first9 = R.
|last10     = Antonini |first10 = P.
|last11     = Arnold |first11 = L.
|last12     = Audejean |first12 = M.
|last13     = Aurard |first13 = P.
|last14     = Bachschmidt |first14 = M.
|last15     = Baduel |first15 = B.
|last16     = Barbotin |first16 = E.
|last17     = Barroy |first17 = P.
|last18     = Baudouin |first18 = P.
|last19     = Berard |first19 = L.
|last20     = Berger |first20 = N.
|last21     = Bernasconi |first21 = L.
|last22     = Bosch |first22 = J. -G.
|last23     = Bouley |first23 = S.
|last24     = Bozhinova |first24 = I.
|last25     = Brinsfield |first25 = J.
|last26     = Brunetto |first26 = L.
|last27     = Canaud |first27 = G.
|last28     = Caron |first28 = J.
|last29     = Carrier |first29 = F.
|last30     = Casalnuovo |first30 = G.
|last31     = Casulli |first31 = S.
|last32     = Cerda |first32 = M.
|last33     = Chalamet |first33 = L.
|last34     = Charbonnel |first34 = S.
|last35     = Chinaglia |first35 = B.
|last36     = Cikota |first36 = A.
|last37     = Colas |first37 = F.
|last38     = Coliac |first38 = J. -F.
|last39     = Collet |first39 = A.
|last40     = Coloma |first40 = J.
|last41     = Conjat |first41 = M.
|last42     = Conseil |first42 = E.
|last43     = Costa |first43 = R.
|last44     = Crippa |first44 = R.
|last45     = Cristofanelli |first45 = M.
|last46     = Damerdji |first46 = Y.
|last47     = Debackère |first47 = A.
|last48     = Decock |first48 = A.
|last49     = Déhais |first49 = Q.
|last50     = Déléage |first50 = T.
|last51     = Delmelle |first51 = S.
|last52     = Demeautis |first52 = C.
|last53     = Dróżdż |first53 = M.
|last54     = Dubos |first54 = G.
|last55     = Dulcamara |first55 = T.
|last56     = Dumont |first56 = M.
|last57     = Durkee |first57 = R.
|last58     = Dymock |first58 = R.
|last59     = Escalante del Valle |first59 = A.
|last60     = Esseiva |first60 = N.
|last61     = Esseiva |first61 = R.
|last62     = Esteban |first62 = M.
|last63     = Fauchez |first63 = T.
|last64     = Fauerbach |first64 = M.
|last65     = Fauvaud |first65 = M.
|last66     = Fauvaud |first66 = S.
|last67     = Forné |first67 = E.
|last68     = Fournel |first68 = C.
|last69     = Fradet |first69 = D.
|last70     = Garlitz |first70 = J.
|last71     = Gerteis |first71 = O.
|last72     = Gillier |first72 = C.
|last73     = Gillon |first73 = M.
|last74     = Giraud |first74 = R.
|last75     = Godard |first75 = J. -P.
|last76     = Goncalves |first76 = R.
|last77     = Hamanowa |first77 = Hiroko
|last78     = Hamanowa |first78 = Hiromi
|last79     = Hay |first79 = K.
|last80     = Hellmich |first80 = S.
|last81     = Heterier |first81 = S.
|last82     = Higgins |first82 = D.
|last83     = Hirsch |first83 = R.
|last84     = Hodosan |first84 = G.
|last85     = Hren |first85 = M.
|last86     = Hygate |first86 = A.
|last87     = Innocent |first87 = N.
|last88     = Jacquinot |first88 = H.
|last89     = Jawahar |first89 = S.
|last90     = Jehin |first90 = E.
|last91     = Jerosimic |first91 = L.
|last92     = Klotz |first92 = A.
|last93     = Koff |first93 = W.
|last94     = Korlevic |first94 = P.
|last95     = Kosturkiewicz |first95 = E.
|last96     = Krafft |first96 = P.
|last97     = Krugly |first97 = Y.
|last98     = Kugel |first98 = F.
|last99     = Labrevoir |first99 = O.
|last100    = Lecacheux |first100 = J.
|last101    = Lehký |first101 = M.
|last102    = Leroy |first102 = A.
|last103    = Lesquerbault |first103 = B.
|last104    = Lopez-Gonzales |first104 = M. J.
|last105    = Lutz |first105 = M.
|last106    = Mallecot |first106 = B.
|last107    = Manfroid |first107 = J.
|last108    = Manzini |first108 = F.
|last109    = Marciniak |first109 = A.
|last110    = Martin |first110 = A.
|last111    = Modave |first111 = B.
|last112    = Montaigut |first112 = R.
|last113    = Montier |first113 = J.
|last114    = Morelle |first114 = E.
|last115    = Morton |first115 = B.
|last116    = Mottola |first116 = S.
|last117    = Naves |first117 = R.
|last118    = Nomen |first118 = J.
|last119    = Oey |first119 = J.
|last120    = Ogłoza |first120 = W.
|last121    = Paiella |first121 = M.
|last122    = Pallares |first122 = H.
|last123    = Peyrot |first123 = A.
|last124    = Pilcher |first124 = F.
|last125    = Pirenne |first125 = J. -F.
|last126    = Piron |first126 = P.
|last127    = Polińska |first127 = M.
|last128    = Polotto |first128 = M.
|last129    = Poncy |first129 = R.
|last130    = Previt |first130 = J. P.
|last131    = Reignier |first131 = F.
|last132    = Renauld |first132 = D.
|last133    = Ricci |first133 = D.
|last134    = Richard |first134 = F.
|last135    = Rinner |first135 = C.
|last136    = Risoldi |first136 = V.
|last137    = Robilliard |first137 = D.
|last138    = Romeuf |first138 = D.
|last139    = Rousseau |first139 = G.
|last140    = Roy |first140 = R.
|last141    = Ruthroff |first141 = J.
|last142    = Salom |first142 = P. A.
|last143    = Salvador |first143 = L.
|last144    = Sanchez |first144 = S.
|last145    = Santana-Ros |first145 = T.
|last146    = Scholz |first146 = A.
|last147    = Séné |first147 = G.
|last148    = Skiff |first148 = B.
|last149    = Sobkowiak |first149 = K.
|last150    = Sogorb |first150 = P.
|last151    = Soldán |first151 = F.
|last152    = Spiridakis |first152 = A.
|last153    = Splanska |first153 = E.
|last154    = Sposetti |first154 = S.
|last155    = Starkey |first155 = D.
|last156    = Stephens |first156 = R.
|last157    = Stiepen |first157 = A.
|last158    = Stoss |first158 = R.
|last159    = Strajnic |first159 = J.
|last160    = Teng |first160 = J. -P.
|last161    = Tumolo |first161 = G.
|last162    = Vagnozzi |first162 = A.
|last163    = Vanoutryve |first163 = B.
|last164    = Vugnon |first164 = J. M.
|last165    = Warner |first165 = B. D.
|last166    = Waucomont |first166 = M.
|last167    = Wertz |first167 = O.
|last168    = Winiarski |first168 = M.
|last169    = Wolf |first169 = M.
|date       = February 2016
|title      = New and updated convex shape models of asteroids based on optical data from a large collaboration network
|journal    = Astronomy and Astrophysics
|volume     = 586
|page       = A108
|bibcode    = 2016A&A...586A.108H
|issn       = 0004-6361
|doi        = 10.1051/0004-6361/201527441
|arxiv      = 1510.07422|s2cid = 119112278 }}</ref>
}} <!-- end of reflist -->
== External links ==
* [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]]
* [http://www.minorplanetcenter.net/iau/lists/NumberedMPs000001.html Discovery Circumstances: Numbered Minor Planets (1)-(5000)] – Minor Planet Center
* {{AstDys|877}}
* {{JPL small body}}
{{Minor planets navigator |876 Scott |number=877 |878 Mildred}}
{{Small Solar System bodies}}
{{Authority control}}
{{DEFAULTSORT:Walkure}}
[[Category:Background asteroids|000877]]
[[Category:Discoveries by Grigory Neujmin]]
[[Category:Named minor planets]]
[[Category:F-type asteroids (Tholen)|000877]]
[[Category:Astronomical objects discovered in 1915|19150913]]