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{{Use dmy dates|date=June 2020}}
{{Infobox planet
{{Infobox planet
| minorplanet= yes
| minorplanet = yes
| name = 734 Benda
| background= #D6D6D6
| background = #D6D6D6
| name= 734 Benda
| image =
| mpc_name= (734) Benda
| image_size =
| alt_names= 1912 PH
| caption =
| discoverer= [[J. Palisa]]
| discovery_ref = &thinsp;<ref name="MPC-object" />
| discovered= 11 October 1912
| discoverer = [[Johann Palisa|J. Palisa]]
| discovery_site= [[Vienna]]
| discovery_site = [[Vienna Observatory|Vienna Obs.]]
| epoch= 31 July 2016 ([[Julian day|JD]] 2457600.5)
| discovered = 11 October 1912
| eccentricity= 0.099646
| mpc_name = (734) Benda
| semimajor= {{Convert|3.1463|AU|Gm|abbr=on}}
| alt_names = A912 TF{{·}}1912 PH
| perihelion= {{Convert|2.8328|AU|Gm|abbr=on}}
| pronounced =
| aphelion= {{Convert|3.4598|AU|Gm|abbr=on|lk=on}}
| named_after = Anna Benda&thinsp;<ref name="springer" /><br />{{small|(discoverer's wife)}}
| period= 5.58 [[Julian year (astronomy)|yr]] (2038.4 [[Julian year (astronomy)|d]])
| mp_category = {{plainlist|
| inclination= 5.8065°
* [[main-belt]]&thinsp;<ref name="MPC-object" /><ref name="jpldata" />{{·}}{{small|([[Kirkwood gap|outer]])}}
| asc_node= 3.1550°
* [[Background asteroid|background]]&thinsp;<ref name="AstDys-object" /><ref name="Ferret" /><ref name="Zappala-family" />
| arg_peri= 66.805°
}}
| mean_anomaly= 164.114[[Degree (angle)|°]]
| orbit_ref = &thinsp;<ref name="jpldata" />
| mean_motion= {{Deg2DMS|0.17661|sup=ms}} / day
| epoch = 31 May 2020 ([[Julian day|JD]] 2459000.5)
| orbit_ref= <ref name="jpldata">{{Cite web |url=https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=734;cad=1 |title=734 Benda (1912 PH) |work=[[JPL Small-Body Database]] |publisher=[[NASA]]/[[Jet Propulsion Laboratory]] |access-date=5 May 2016}}</ref>
| uncertainty = 0
| observation_arc= 96.14 yr (35116 d)
| observation_arc = 106.17 [[Julian year (astronomy)|yr]] (38,778 d)
| uncertainty= 0
| aphelion = 3.4628 [[Astronomical unit|AU]]
| abs_magnitude= 9.9
| perihelion = 2.8333 AU
| rotation= {{Convert|7.110|h|d|abbr=on|lk=on}}
| semimajor = 3.1481 AU
| albedo= {{val|0.0464|0.004}}
| eccentricity = 0.1000
| mean_radius= {{val|35.41|1.45}} [[Kilometre|km]]
| period = 5.59 yr (2,040 d)
| mean_anomaly = 51.852[[Degree (angle)|°]]
| mean_motion = {{Deg2DMS|0.1765|sup=ms}} / day
| inclination = 5.8048°
| asc_node = 3.1349°
| arg_peri = 66.244°
| mean_diameter = {{plainlist|
* {{val|65.917|0.746|ul=km}}<ref name="Mainzer-2016" />
* {{val|70.82|2.9|u=km}}<ref name="SIMPS" />
* {{val|73.28|1.57|u=km}}<ref name="AKARI" />
}}
| rotation = {{val|7.110|0.003|ul=h}}<ref name="Stephens-2014d" />{{efn|name=Lightcurve-plot-Stephens}}
| albedo = {{plainlist|
* {{val|0.044|0.002}}<ref name="AKARI" />
* {{val|0.0464|0.004}}<ref name="SIMPS" />
* {{val|0.051|0.005}}<ref name="Masiero-2014" />
}}
| spectral_type = [[X-type asteroid|X]] {{small|([[Small Solar System Objects Spectroscopic Survey|S3OS2]])}}<ref name="Lazzaro-2004" />
| abs_magnitude = {{plainlist|
* 9.70<ref name="Mainzer-2016" /><ref name="SIMPS" /><ref name="AKARI" />
* 9.9<ref name="MPC-object" /><ref name="jpldata" />}}
}}
}}


'''734 Benda''' (''[[Minor planet provisional designation|prov. designation]]:'' {{mp|A912 TF}} ''or'' {{mp|1912 PH}}) is a large [[background asteroid]] from the outer regions of the [[asteroid belt]], approximately {{convert|70|km|mi|abbr=off|sigfig=2|sp=us}} in diameter. It was discovered by Austrian astronomer [[Johann Palisa]] at the [[Vienna Observatory]] on 11 October 1912.<ref name="MPC-object" /> For its size, the dark [[X-type asteroid]] has a relatively short [[rotation period]] of 7.1 hours. It was named after the discoverer's wife, Anna Benda.<ref name="springer" />
'''734 Benda''' is a [[minor planet]] orbiting the [[Sun]].


== Orbit and classification ==
==See also==
* [[List of minor planets/701–800]]
* [[Meanings of minor planet names: 501–1000]]


''Benda'' 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" /><ref name="Zappala-family" /> It orbits the Sun in the [[Kirkwood gap|outer]] asteroid belt at a distance of 2.8–3.5&nbsp;[[Astronomical unit|AU]] once every 5 years and 7 months (2,040 days; [[semi-major axis]] of 3.15&nbsp;AU). Its orbit has an [[orbital eccentricity|eccentricity]] of 0.10 and an [[orbital inclination|inclination]] of 6[[Degree (angle)|°]] with respect to the [[ecliptic]].<ref name="jpldata" /> The body's [[observation arc]] begins at the discovering Vienna Observatory on 23 February 1920, almost eight years after its official discovery observation.<ref name="MPC-object" />
==References==
{{Reflist}}


==External links==
== Naming ==

This [[minor planet]] was named by friends of the discoverer after Anna Benda, second wife of [[Johann Palisa]], whom he married in 1902. However, the {{MoMP|734|naming}} was erroneously attributed to the Czech composer [[Karel Bendl]] (1838–1897) in previous editions of the ''[[Dictionary of Minor Planet Names]]''.<ref name="springer" />

== Physical characteristics ==

''Benda'' is an [[X-type asteroid]] in both the Tholen- and SMASS-like taxonomic variants of the [[Small Solar System Objects Spectroscopic Survey]] (S3OS2).<ref name="Ferret" /><ref name="Lazzaro-2004" /> In agreement with its low albedo ''(see below)'', this object has also been classified as a [[C-type asteroid|C-type]] and [[P-type asteroid]].<ref name="lcdb" />

=== Rotation period ===

In October 2013, a rotational [[lightcurve]] of ''Benda'' was obtained from [[Photometry (astronomy)|photometric]] observations over two nights by [[Robert D. Stephens|Robert Stephens]] at the [[Center for Solar System Studies]] {{Obscode|U81}} in California. Lightcurve analysis gave a well-defined [[rotation period]] of {{val|7.110|0.003}} hours with a brightness variation of {{val|0.32|0.02}} [[Magnitude (astronomy)|magnitude]] ({{small|[[LCDB quality code|U=3]]}}).<ref name="Stephens-2014d" />{{efn|name=Lightcurve-plot-Stephens}}

In August 1995, a first period of {{val|7.114}} hours was determined by [[Stefano Mottola]] ({{small|[[LCDB quality code|U=n/a]]}}).<ref name="lcdb" /> In March 2004, French amateur astronomer [[René Roy (astronomer)|René Roy]] obtained a period of {{val|7.11|0.01}} hours with an amplitude of {{val|0.28|0.01}} magnitude from three nights of observations ({{small|[[LCDB quality code|U=3]]}}),<ref name="geneva-obs" /> while Robert K. Buchheim determined a period of {{val|7.106|0.005}} hours and an amplitude of {{val|0.28|0.02}} magnitude observing ''Benda'' over 10 nights at the Altimira Observatory {{Obscode|G76}} in November 2007 ({{small|[[LCDB quality code|U=3]]}}).<ref name="Buchheim-2009" /> In September 2018, a collaboration of the Italian Amateur Astronomers Union reported a period of {{val|7.105|0.001}} hours with a brightness variation of {{val|0.25|0.03}} magnitude ({{small|[[LCDB quality code|U=3–]]}}).<ref name="Franco-2019a" />
=== Diameter and albedo ===

According to the surveys carried out by the [[NEOWISE]] mission of NASA's [[Wide-field Infrared Survey Explorer]] (WISE), the Infrared Astronomical Satellite [[IRAS]], and the Japanese [[Akari (satellite)|Akari satellite]], ''Benda'' measures ({{val|65.917|0.746}}), ({{val|70.82|2.9}}) and ({{val|73.28|1.57}}) kilometers in diameter and its surface has an [[astronomical albedo|albedo]] of ({{val|0.054|0.010}}), ({{val|0.0464|0.004}}) and ({{val|0.044|0.002}}), respectively.<ref name="Mainzer-2016" /><ref name="SIMPS" /><ref name="AKARI" /> The ''Collaborative Asteroid Lightcurve Link'' derives a low albedo of 0.0387 and a diameter of 70.71 kilometers based on an [[absolute magnitude]] of 9.9.<ref name="lcdb" />

Alternative mean-diameters published by the WISE team include ({{val|64.45|17.46|u=km}}), ({{val|67.318|0.267|u=km}}),<ref name="Masiero-2014" /> ({{val|70.085|0.269|u=km}}), ({{val|70.65|16.79|u=km}}) and ({{val|71.722|22.052|u=km}}) with a corresponding albedo of ({{val|0.05|0.04}}), ({{val|0.051|0.005}}), ({{val|0.0474|0.0092}}), ({{val|0.04|0.02}}) and ({{val|0.037|0.020}}).<ref name="Ferret" /><ref name="lcdb" /> Two [[asteroid occultation]]s on 4 April 2009 and on 3 September 2013, gave a best-fit ellipse dimension of ({{val|70.0|x|70.0|u=km}}) and ({{val|73.0|x|73.0|u=km}}), respectively, each with a low quality rating of 1.<ref name="Ferret" /> These timed observations are taken when the asteroid passes in front of a distant star.<ref name="Ferret" />

== Notes ==
{{notelist|refs=

{{efn|name=Lightcurve-plot-Stephens|1=[http://www.planetarysciences.org/plots/RDS/734_BENDA_2013-10-17.PNG Lightcurve plot of (734) Benda], by [[Robert D. Stephens|Robert Stephens]] at the Center for Solar System Studies {{Obscode|U81}} (2013). Rotation period {{val|7.110|0.003}} hours with a brightness amplitude of {{val|0.32}} mag. Quality code is 3. Summary figures at the [http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=734 LCDB] and [http://planetarysciences.org/lightcurves.html CS3] websites.}}

}} <!-- end of notelist -->

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

<ref name="jpldata">{{cite web
|type = 2020-04-26 last obs.
|title = JPL Small-Body Database Browser: 734 Benda (A912 TF)
|url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2000734
|publisher = [[Jet Propulsion Laboratory]]
|accessdate = 9 June 2020}}</ref>

<ref name="springer">{{cite book
|title = Dictionary of Minor Planet Names
|last = Schmadel | first = Lutz D.
|publisher = Springer Berlin Heidelberg
|chapter = (734) Benda
|page = 70
|date = 2007
|doi = 10.1007/978-3-540-29925-7_735
|isbn = 978-3-540-00238-3}}</ref>

<ref name="MPC-object">{{cite web
|title = 734 Benda (A912 TF)
|work = Minor Planet Center
|url = https://www.minorplanetcenter.net/db_search/show_object?object_id=734
|accessdate = 9 June 2020}}</ref>

<ref name="geneva-obs">{{cite web
|title = Asteroids and comets rotation curves – (734) Benda
|last = Behrend |first = Raoul
|publisher = Geneva Observatory
|url = http://obswww.unige.ch/~behrend/page2cou.html#000734
|accessdate = 9 June 2020}}</ref>

<ref name="lcdb">{{cite web
|title = LCDB Data for (734) Benda
|publisher = Asteroid Lightcurve Database (LCDB)
|url = http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=734
|accessdate = 9 June 2020}}</ref>

<ref name="Mainzer-2016">{{cite journal
|display-authors = 6
|first1 = A. K. |last1 = Mainzer
|first2 = J. M. |last2 = Bauer
|first3 = R. M. |last3 = Cutri
|first4 = T. |last4 = Grav
|first5 = E. A. |last5 = Kramer
|first6 = J. R. |last6 = Masiero
|first7 = C. R. |last7 = Nugent
|first8 = S. M. |last8 = Sonnett
|first9 = R. A. |last9 = Stevenson
|first10 = E. L. |last10 = Wright
|date = June 2016
|title = NEOWISE Diameters and Albedos V1.0
|url = https://sbnarchive.psi.edu/pds3/non_mission/EAR_A_COMPIL_5_NEOWISEDIAM_V1_0/data/neowise_mainbelt.tab
|journal = NASA Planetary Data System
|bibcode = 2016PDSS..247.....M
|access-date= 9 June 2020}}</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
|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}}</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= 9 June 2020}} ([http://vizier.cfa.harvard.edu/viz-bin/VizieR-5?-source=J/PASJ/63/1117/acua_v1&Num=734 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
|accessdate = 9 June 2020}}</ref>

<ref name="Buchheim-2009">{{cite journal
|last1 = Buchheim |first1 = Robert K.
|date = July 2009
|title = Lightcurves of Asteroids 358 Apollonia, 734 Benda, and 8356 Wadhwa
|journal = Minor Planet Bulletin
|url = http://www.minorplanet.info/MPB/issues/MPB_36-3.pdf
|volume = 36
|issue = 3
|pages = 84–85
|bibcode = 2009MPBu...36...84B
|issn = 1052-8091}}</ref>

<ref name="Stephens-2014d">{{cite journal
|last1 = Stephens |first1 = Robert D.
|date = April 2014
|title = Asteroids Observed from CS3: 2013 October-December
|journal = Minor Planet Bulletin
|url = http://www.minorplanet.info/MPB/issues/MPB_41-2.pdf
|volume = 41
|issue = 2
|pages = 92–95
|bibcode = 2014MPBu...41...92S
|issn = 1052-8091}}</ref>

<ref name="Franco-2019a">{{cite journal
|display-authors = 6
|last1 = Franco |first1 = Lorenzo
|last2 = Marchini |first2 = Alessandro
|last3 = Baj |first3 = Giorgio
|last4 = Scarfi |first4 = Giulio
|last5 = Bacci |first5 = Paolo
|last6 = Maestripieri |first6 = Martina
|last7 = Bacci |first7 = Roberto
|last8 = Papini |first8 = Riccardo
|last9 = Salvaggio |first9 = Fabio
|last10 = Banfi |first10 = Massimo
|date = January 2019
|title = Lightcurves for 131 Vala, 374 Burgundia, 734 Brenda, and 929 Algunde
|journal = Minor Planet Bulletin
|url = http://www.minorplanet.info/MPB/issues/MPB_46-1.pdf
|volume = 46
|issue = 1
|pages = 85–86
|bibcode = 2019MPBu...46...85F
|issn = 1052-8091}}</ref>

<ref name="Ferret">{{cite web
|title = Asteroid 734 Benda
|work = Small Bodies Data Ferret
|url = https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=734+Benda
|accessdate = 9 June 2020}}</ref>

<ref name="AstDys-object">{{cite web
|title = Asteroid 734 Benda – Proper Elements
|publisher = AstDyS-2, Asteroids – Dynamic Site
|url = https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=734
|access-date= 9 June 2020}}</ref>

<ref name="Zappala-family">{{cite journal
|last1 = Zappalà |first1 = V.
|last2 = Bendjoya |first2 = Ph.
|last3 = Cellino |first3 = A.
|last4 = Farinella |first4 = P.
|last5 = Froeschle |first5 = C.
|date = 1997
|title = Asteroid Dynamical Families
|url = https://sbnarchive.psi.edu/pds3/non_mission/EAR_A_5_DDR_FAMILY_V4_1/data/family.tab
|journal = NASA Planetary Data System
|pages = EAR-A-5-DDR-FAMILY-V4.1
|accessdate = 9 June 2020}}} ([https://sbn.psi.edu/pds/resource/family.html PDS main page])</ref>

<ref name="Lazzaro-2004">{{Cite journal
|first1 = D. |last1 = Lazzaro
|first2 = C. A. |last2 = Angeli
|first3 = J. M. |last3 = Carvano
|first4 = T. |last4 = Mothé-Diniz
|first5 = R. |last5 = Duffard
|first6 = M. |last6 = Florczak
|date = November 2004
|title = S3OS2: the visible spectroscopic survey of 820 asteroids
|url = http://sirrah.troja.mff.cuni.cz/yarko-site/tmp/eos/NEW/spectral_type_figure/s3os2.pdf
|journal = Icarus
|volume = 172
|issue = 1
|pages = 179–220
|bibcode = 2004Icar..172..179L
|doi = 10.1016/j.icarus.2004.06.006
|access-date= 9 June 2020}}</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|734}}
* {{AstDys|734}}
* {{JPL small body}}
* {{JPL small body}}


{{Use dmy dates|date=October 2019}}
{{Minor planets navigator |733 Mocia |number=734 |735 Marghanna}}
{{Minor planets navigator |733 Mocia |number=734 |735 Marghanna}}
{{Small Solar System bodies}}
{{Small Solar System bodies}}


{{DEFAULTSORT:000734}}
{{DEFAULTSORT:Benda}}
[[Category:Background asteroids]]
[[Category:Background asteroids|000734]]
[[Category:Minor planets named for people|Benda]]
[[Category:Discoveries by Johann Palisa]]
[[Category:Named minor planets|Benda]]
[[Category:Minor planets named for people]]
[[Category:Named minor planets]]
[[Category:Astronomical objects discovered in 1912|19121011]]
[[Category:Astronomical objects discovered in 1912|19121011]]
[[Category:Discoveries by Johann Palisa|Benda]]


{{beltasteroid-stub}}

Revision as of 15:52, 9 June 2020

734 Benda
Discovery [1]
Discovered byJ. Palisa
Discovery siteVienna Obs.
Discovery date11 October 1912
Designations
(734) Benda
Named after
Anna Benda [2]
(discoverer's wife)
A912 TF · 1912 PH
Orbital characteristics [3]
Epoch 31 May 2020 (JD 2459000.5)
Uncertainty parameter 0
Observation arc106.17 yr (38,778 d)
Aphelion3.4628 AU
Perihelion2.8333 AU
3.1481 AU
Eccentricity0.1000
5.59 yr (2,040 d)
51.852°
0° 10m 35.4s / day
Inclination5.8048°
3.1349°
66.244°
Physical characteristics
Mean diameter
  • 65.917±0.746 km[7]
  • 70.82±2.9 km[8]
  • 73.28±1.57 km[9]
7.110±0.003 h[10][a]
X (S3OS2)[12]

734 Benda (prov. designation: A912 TF or 1912 PH) is a large background asteroid from the outer regions of the asteroid belt, approximately 70 kilometers (43 miles) in diameter. It was discovered by Austrian astronomer Johann Palisa at the Vienna Observatory on 11 October 1912.[1] For its size, the dark X-type asteroid has a relatively short rotation period of 7.1 hours. It was named after the discoverer's wife, Anna Benda.[2]

Orbit and classification

Benda is a non-family asteroid of the main belt's background population when applying the hierarchical clustering method to its proper orbital elements.[4][5][6] It orbits the Sun in the outer asteroid belt at a distance of 2.8–3.5 AU once every 5 years and 7 months (2,040 days; semi-major axis of 3.15 AU). Its orbit has an eccentricity of 0.10 and an inclination of 6° with respect to the ecliptic.[3] The body's observation arc begins at the discovering Vienna Observatory on 23 February 1920, almost eight years after its official discovery observation.[1]

Naming

This minor planet was named by friends of the discoverer after Anna Benda, second wife of Johann Palisa, whom he married in 1902. However, the naming was erroneously attributed to the Czech composer Karel Bendl (1838–1897) in previous editions of the Dictionary of Minor Planet Names.[2]

Physical characteristics

Benda is an X-type asteroid in both the Tholen- and SMASS-like taxonomic variants of the Small Solar System Objects Spectroscopic Survey (S3OS2).[5][12] In agreement with its low albedo (see below), this object has also been classified as a C-type and P-type asteroid.[13]

Rotation period

In October 2013, a rotational lightcurve of Benda was obtained from photometric observations over two nights by Robert Stephens at the Center for Solar System Studies (U81) in California. Lightcurve analysis gave a well-defined rotation period of 7.110±0.003 hours with a brightness variation of 0.32±0.02 magnitude (U=3).[10][a]

In August 1995, a first period of 7.114 hours was determined by Stefano Mottola (U=n/a).[13] In March 2004, French amateur astronomer René Roy obtained a period of 7.11±0.01 hours with an amplitude of 0.28±0.01 magnitude from three nights of observations (U=3),[14] while Robert K. Buchheim determined a period of 7.106±0.005 hours and an amplitude of 0.28±0.02 magnitude observing Benda over 10 nights at the Altimira Observatory (G76) in November 2007 (U=3).[15] In September 2018, a collaboration of the Italian Amateur Astronomers Union reported a period of 7.105±0.001 hours with a brightness variation of 0.25±0.03 magnitude (U=3–).[16]

Diameter and albedo

According to the surveys carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer (WISE), the Infrared Astronomical Satellite IRAS, and the Japanese Akari satellite, Benda measures (65.917±0.746), (70.82±2.9) and (73.28±1.57) kilometers in diameter and its surface has an albedo of (0.054±0.010), (0.0464±0.004) and (0.044±0.002), respectively.[7][8][9] The Collaborative Asteroid Lightcurve Link derives a low albedo of 0.0387 and a diameter of 70.71 kilometers based on an absolute magnitude of 9.9.[13]

Alternative mean-diameters published by the WISE team include (64.45±17.46 km), (67.318±0.267 km),[11] (70.085±0.269 km), (70.65±16.79 km) and (71.722±22.052 km) with a corresponding albedo of (0.05±0.04), (0.051±0.005), (0.0474±0.0092), (0.04±0.02) and (0.037±0.020).[5][13] Two asteroid occultations on 4 April 2009 and on 3 September 2013, gave a best-fit ellipse dimension of (70.0 km × 70.0 km) and (73.0 km × 73.0 km), respectively, each with a low quality rating of 1.[5] These timed observations are taken when the asteroid passes in front of a distant star.[5]

Notes

  1. ^ a b Lightcurve plot of (734) Benda, by Robert Stephens at the Center for Solar System Studies (U81) (2013). Rotation period 7.110±0.003 hours with a brightness amplitude of 0.32 mag. Quality code is 3. Summary figures at the LCDB and CS3 websites.

References

  1. ^ a b c d e "734 Benda (A912 TF)". Minor Planet Center. Retrieved 9 June 2020.
  2. ^ a b c Schmadel, Lutz D. (2007). "(734) Benda". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 70. doi:10.1007/978-3-540-29925-7_735. ISBN 978-3-540-00238-3.
  3. ^ a b c d "JPL Small-Body Database Browser: 734 Benda (A912 TF)" (2020-04-26 last obs.). Jet Propulsion Laboratory. Retrieved 9 June 2020.
  4. ^ a b "Asteroid 734 Benda – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 9 June 2020.
  5. ^ a b c d e f "Asteroid 734 Benda". Small Bodies Data Ferret. Retrieved 9 June 2020.
  6. ^ a b Zappalà, V.; Bendjoya, Ph.; Cellino, A.; Farinella, P.; Froeschle, C. (1997). "Asteroid Dynamical Families". NASA Planetary Data System: EAR-A-5-DDR-FAMILY-V4.1. Retrieved 9 June 2020.} (PDS main page)
  7. ^ a b c Mainzer, A. K.; Bauer, J. M.; Cutri, R. M.; Grav, T.; Kramer, E. A.; Masiero, J. R.; et al. (June 2016). "NEOWISE Diameters and Albedos V1.0". NASA Planetary Data System. Bibcode:2016PDSS..247.....M. Retrieved 9 June 2020.
  8. ^ a b c d Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System. 12: IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode:2004PDSS...12.....T. Retrieved 9 June 2020.
  9. ^ 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 9 June 2020. (online, AcuA catalog p. 153)
  10. ^ a b Stephens, Robert D. (April 2014). "Asteroids Observed from CS3: 2013 October-December" (PDF). Minor Planet Bulletin. 41 (2): 92–95. Bibcode:2014MPBu...41...92S. ISSN 1052-8091.
  11. ^ 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". The Astrophysical Journal. 791 (2): 11. arXiv:1406.6645. Bibcode:2014ApJ...791..121M. doi:10.1088/0004-637X/791/2/121.
  12. ^ a b Lazzaro, D.; Angeli, C. A.; Carvano, J. M.; Mothé-Diniz, T.; Duffard, R.; Florczak, M. (November 2004). "S3OS2: the visible spectroscopic survey of 820 asteroids" (PDF). Icarus. 172 (1): 179–220. Bibcode:2004Icar..172..179L. doi:10.1016/j.icarus.2004.06.006. Retrieved 9 June 2020.
  13. ^ a b c d "LCDB Data for (734) Benda". Asteroid Lightcurve Database (LCDB). Retrieved 9 June 2020.
  14. ^ Behrend, Raoul. "Asteroids and comets rotation curves – (734) Benda". Geneva Observatory. Retrieved 9 June 2020.
  15. ^ Buchheim, Robert K. (July 2009). "Lightcurves of Asteroids 358 Apollonia, 734 Benda, and 8356 Wadhwa" (PDF). Minor Planet Bulletin. 36 (3): 84–85. Bibcode:2009MPBu...36...84B. ISSN 1052-8091.
  16. ^ Franco, Lorenzo; Marchini, Alessandro; Baj, Giorgio; Scarfi, Giulio; Bacci, Paolo; Maestripieri, Martina; et al. (January 2019). "Lightcurves for 131 Vala, 374 Burgundia, 734 Brenda, and 929 Algunde" (PDF). Minor Planet Bulletin. 46 (1): 85–86. Bibcode:2019MPBu...46...85F. ISSN 1052-8091.

External links

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