imported>Shocksingularity: Adding local short description: "Main-belt asteroid", overriding Wikidata description "main-belt asteroid"

2025-09-23T16:10:50Z

Adding local short description: "Main-belt asteroid", overriding Wikidata description "main-belt asteroid"

New page

{{Short description|Main-belt asteroid}}
{{Use dmy dates|date=April 2018}}
{{Infobox planet
| minorplanet = yes
| name = 173 Ino
| background = #D6D6D6
| image = 173 Ino VLT (2021), deconvolved.pdf
| image_size =
| caption =
| discovery_ref = <ref name="MPC-object" />
| discoverer = [[Alphonse Borrelly|A. Borrelly]]
| discovery_site = Marseille
| discovered = 1 August 1877
| mpc_name = (173) Ino
| alt_names = A877 PA; 1922 SB
| pronounced = {{IPAc-en|'|aɪ|n|oʊ}} {{respell|EYE|noh}}<ref>Noah Webster (1884) ''A Practical Dictionary of the English Language''</ref>
| adjectives = Inoan ({{IPAc-en|aɪ|ˈ|n|oʊ|@|n}} {{respell|eye|NOH|ən}})<ref>George Stuart (1882) ''The Eclogues, Georgics, and Moretum of Virgil'', p. 271</ref>
| named_after = [[Ino (Greek mythology)|Ἰνώ]] ''Īnṓ''<ref name="springer" /> {{small|(Greek mythology)}}
| mp_category = [[main-belt]]<ref name="MPC-object" /><ref name="jpldata" />{{·}}{{small|([[Kirkwood gap|middle]])}} [[Ino family|Ino]]<ref name="Ferret" />
| orbit_ref = <ref name="jpldata" />
| epoch = 23 March 2018 ([[Julian day|JD]] 2458200.5)
| uncertainty = 0
| observation_arc = 138.75 [[Julian year (astronomy)|yr]] (50,678 d)
| aphelion = 3.3142 [[Astronomical unit|AU]]
| perihelion = 2.1708 AU
| semimajor = 2.7425 AU
| eccentricity = 0.2085
| period = 4.54 yr (1,659 d)
| mean_anomaly = 307.27[[Degree (angle)|°]]
| mean_motion = {{Deg2DMS|0.2170|sup=ms}} / day
| inclination = 14.197°
| asc_node = 148.18°
| arg_peri = 228.89°
| flattening = 0.24{{efn|1=Flattening derived from the maximum aspect ratio (c/a): <math>f=1-\frac{c}{a}</math>, where (c/a) = {{val|0.76|0.06}}.<ref name=VLT/>}}
| mean_diameter = {{val|145|3|u=km}}<ref name=VLT>P. Vernazza et al. (2021) VLT/SPHERE imaging survey of the largest main-belt asteroids: Final results and synthesis. ''Astronomy & Astrophysics'' 54, A56</ref> {{val|119|27|ul=km}}<ref name="Nugent-2016" /> {{val|125.8|1.5|u=km}}<ref name="Masiero-2012" /> {{val|148|42|u=km}}<ref name="Nugent-2015" /> {{val|154.1|3.5|u=km}}<ref name="SIMPS" /> {{val|160.6|u=km}}<ref name="AKARI" />
| mass = {{val|2.2|1.3|e=18|u=kg}}<ref name=VLT/> {{val|4.79|3.11|e=18|ul=kg}}<ref name="Carry-2012" />
| density = {{val|1.4|0.8|u=g/cm3}}<ref name=VLT/> {{val|2.23|1.47|u=g/cm3}}<ref name="Carry-2012" />
| rotation = {{val|5.93|ul=h}}<ref name="Schober-1978b" /> {{val|6.1|0.2|u=h}}<ref name="geneva-obs" /> {{val|6.106|0.001|u=h}}<ref name="geneva-obs" /> {{val|6.1088|0.0007|u=h}}<ref name="geneva-obs" /> {{val|6.11|u=h}}<ref name="Erikson-1990" /> {{val|6.113|0.002|u=h}}<ref name="Gandolfi-2009" /> {{val|6.11651|u=h}}<ref name="Michalowski-2005" /> {{val|6.15|u=h}}<ref name="Debehogne-1990" /><ref name="jpldata" /> {{val|6.163|u=h}}<ref name="Michalowski-1993" />
| albedo = 0.061 (calculated)<ref name=VLT/> {{val|0.059}}<ref name="AKARI" /> {{val|0.06|0.02}}<ref name="Nugent-2015" /> {{val|0.0642|0.003}}<ref name="SIMPS" /> {{val|0.07|0.05}}<ref name="Nugent-2016" /> {{val|0.096|0.018}}<ref name="Masiero-2012" /><ref name="jpldata" />
| spectral_type = [[Tholen classification|Tholen]] {{=}} [[C-type asteroid|C]]<ref name="jpldata" /> [[SMASS classification|SMASS]] {{=}} [[X-type asteroid|X]]k<ref name="jpldata" /> [[Asteroid color indices|B–V]] {{=}} 0.705<ref name="jpldata" /> [[Asteroid color indices|U–B]] {{=}} 0.305<ref name="jpldata" />
| abs_magnitude = 7.66<ref name="Masiero-2012" /><ref name="Nugent-2015" /><ref name="SIMPS" /><ref name="AKARI" /><ref name="lcdb" /> 7.99<ref name="jpldata" /> {{val|7.80|0.05}}<ref name="Warner-2007i" /> 7.90<ref name="Nugent-2016" /><ref name="Veres-2015" />
}}

'''173 Ino''' is a large [[asteroid]] and the parent body of the [[Ino family]], located in the central regions of the [[asteroid belt]], approximately {{convert|150|km|mi|abbr=off|sigfig=2|sp=us}} in diameter. It was discovered on 1 August 1877, by French astronomer [[Alphonse Borrelly]] at [[Marseille Observatory]] in southern France, and named after the queen [[Ino (Greek mythology)|Ino]] from [[Greek mythology]].<ref name="MPC-object" /><ref name="springer" /> The dark Xk-type asteroid has a [[rotation period]] of 6.15 hours.<ref name="lcdb" />

== Orbit and classification ==

''Ino'' is the parent body and namesake of the [[Ino family]] ({{small|[[FIN tbl#522|522]]}}),<ref name="Ferret" /> an [[asteroid family]] in the intermediate main belt with nearly 500 known members.<ref name="Nesvorny-2014" />{{rp|23}} The adjectival form of the asteroid name is "Inoan".

It orbits the Sun in the [[Kirkwood gap|central]] main-belt at a distance of 2.2–3.3 [[Astronomical unit|AU]] once every 4 years and 6 months (1,659 days; [[semi-major axis]] of 2.74 AU). Its orbit has an [[orbital eccentricity|eccentricity]] of 0.21 and an [[orbital inclination|inclination]] of 14[[Degree (angle)|°]] with respect to the [[ecliptic]].<ref name="jpldata" /> The body's [[observation arc]] begins at [[Düsseldorf-Bilk Observatory]] in January 1879, five months after its official discovery observation at Marseilles.<ref name="MPC-object" />

== Physical characteristics ==

In the [[Tholen classification]], ''Ino'' is a common carbonaceous [[C-type asteroid|C-type]], while in the [[SMASS classification]] it is a Xk-subtype that transitions between the [[X-type asteroid|X-type]] and uncommon [[K-type asteroid]]s.<ref name="jpldata" />

Multiple [[Photometry (astronomy)|photometric]] studies of this asteroid were performed between 1978 and 2002. The combined data gave an irregular, asymmetrical [[light curve]] with a period of 6.163 ± 0.005 hours and a brightness variation of 0.10–0.15 in [[Magnitude (astronomy)|magnitude]]. The asteroid is rotating in a [[Retrograde and prograde motion|retrograde]] direction.<ref name="Michalowski-2005"/>

== Notes ==
{{notelist}}

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

<ref name="jpldata">{{cite web
|type = 2017-10-21 last obs.
|title = JPL Small-Body Database Browser: 173 Ino
|url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2000173
|publisher = [[Jet Propulsion Laboratory]]
|accessdate = 18 April 2018}}</ref>

<ref name="springer">{{cite book
|pages = 30 |last = Schmadel | first = Lutz D.
|title = Dictionary of Minor Planet Names |publisher = Springer Berlin Heidelberg
|date = 2007
|isbn = 978-3-540-00238-3
|doi = 10.1007/978-3-540-29925-7_174 |chapter = (173) Ino }}</ref>

<ref name="MPC-object">{{cite web
|title = 173 Ino
|work = Minor Planet Center
|url = https://www.minorplanetcenter.net/db_search/show_object?object_id=173
|accessdate = 18 April 2018}}</ref>

<ref name="geneva-obs">{{cite web
|title = Asteroids and comets rotation curves – (173) Ino
|last = Behrend |first = Raoul
|publisher = Geneva Observatory
|url = http://obswww.unige.ch/~behrend/page1cou.html#000173
|accessdate = 18 April 2018}}</ref>

<ref name="Carry-2012">{{Citation
|first1 = B.
|last1 = Carry
|date = December 2012
|title = Density of asteroids
|journal = Planetary and Space Science
|volume = 73
|issue = 1
|pages = 98–118
|doi = 10.1016/j.pss.2012.03.009
|bibcode = 2012P&SS...73...98C
|arxiv = 1203.4336 }} See Table 1.</ref>

<ref name="Ferret">{{cite web
|title = Asteroid 173 Ino
|work = Small Bodies Data Ferret
|url = https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=173+Ino
|accessdate = 24 October 2019}}</ref>

<ref name="Nesvorny-2014">{{Cite book
|first1 = D. |last1 = Nesvorný
|first2 = M. |last2 = Broz
|first3 = V. |last3 = Carruba
|date = December 2014
|chapter = Identification and Dynamical Properties of Asteroid Families
|title = Asteroids IV
|pages = 297–321
|bibcode = 2015aste.book..297N
|doi = 10.2458/azu_uapress_9780816532131-ch016
|arxiv = 1502.01628
|isbn = 9780816532131
}}</ref>

<ref name="lcdb">{{cite web
|title = LCDB Data for (173) Ino
|publisher = Asteroid Lightcurve Database (LCDB)
|url = http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=173%7CIno
|accessdate = 18 April 2018}}</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= free
}} ([http://vizier.cfa.harvard.edu/viz-bin/VizieR-5?-source=J/PASJ/63/1117/acua_v1&Num=173 online], [https://core.ac.uk/download/pdf/43545172.pdf AcuA catalog p. 153])</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
|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
|doi-access = free }}</ref>

<ref name="Nugent-2015">{{cite journal
|display-authors = 6
|first1 = C. R. |last1 = Nugent
|first2 = A. |last2 = Mainzer
|first3 = J. |last3 = Masiero
|first4 = J. |last4 = Bauer
|first5 = R. M. |last5 = Cutri
|first6 = T. |last6 = Grav
|first7 = E. |last7 = Kramer
|first8 = S. |last8 = Sonnett
|first9 = R. |last9 = Stevenson
|first10 = E. L. |last10 = Wright
|date = December 2015
|title = NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos
|journal = The Astrophysical Journal
|volume = 814
|issue = 2
|page = 13
|bibcode = 2015ApJ...814..117N
|doi = 10.1088/0004-637X/814/2/117
|arxiv = 1509.02522
}}</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
|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
}}</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="Debehogne-1990">{{Cite journal
|first1 = H. |last1 = Debehogne
|first2 = C.-I. |last2 = Lagerkvist
|first3 = P. |last3 = Magnusson
|first4 = G. |last4 = Hahn
|date = December 1989
|title = Physical studies of asteroids XX - Photoelectric photometry of asteroids
|url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1990acm..proc...45D
|journal = Asteroids
|page = 45
|bibcode = 1990acm..proc...45D
|access-date= 18 April 2018}}</ref>

<ref name="Gandolfi-2009">{{Cite journal
|first1 = D. |last1 = Gandolfi
|first2 = M. |last2 = Cigna
|first3 = D. |last3 = Fulvio
|first4 = C. |last4 = Blanco
|date = January 2009
|title = CCD and photon-counting photometric observations of asteroids carried out at Padova and Catania observatories
|journal = Planetary and Space Science
|volume = 57
|issue = 1
|pages = 1–9
|bibcode = 2009P&SS...57....1G
|doi = 10.1016/j.pss.2008.09.014
|arxiv = 0810.1560
}}</ref>

<ref name="Erikson-1990">{{Cite journal
|author = Erikson, A.
|date = December 1989
|title = Improvement of Rotation Periods for the Asteroids 12 Victoria, 173 Ino and 1245 Calvinia
|url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1990acm..proc...55E
|journal = Asteroids
|page = 55
|bibcode = 1990acm..proc...55E
|access-date= 18 April 2018}}</ref>

<ref name="Michalowski-1993">{{Cite journal
|author = Michalowski, Tadeusz
|date = December 1993
|title = Poles, shapes, senses of rotation, and sidereal periods of asteroids
|url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1993Icar..106..563M
|journal = Icarus
|volume = 106
|issue = 2
|page = 563
|bibcode = 1993Icar..106..563M
|doi = 10.1006/icar.1993.1193
|access-date= 18 April 2018}}</ref>

<ref name="Schober-1978b">{{Cite journal
|author = Schober, H. J.
|date = December 1978
|title = Photometric Variations of the Minor Planets 55 Pandora and 173 Ino during the Opposition in 1977: Light Curves and Rotation Periods
|url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1978A&AS...34..377S
|journal = Astronomy and Astrophysics Supplement
|volume = 34
|pages = 377
|bibcode = 1978A&AS...34..377S
|access-date= 18 April 2018}}</ref>

<ref name="Michalowski-2005">{{Cite journal
|display-authors = 6
|first1 = T. |last1 = Michalowski
|first2 = M. |last2 = Kaasalainen
|first3 = A. |last3 = Marciniak
|first4 = P. |last4 = Denchev
|first5 = T. |last5 = Kwiatkowski
|first6 = A. |last6 = Kryszczynska
|first7 = R. |last7 = Hirsch
|first8 = F. P. |last8 = Velichko
|first9 = A. |last9 = Erikson
|first10 = Gy. M. |last10 = Szabó
|first11 = R. |last11 = Kowalski
|date = November 2005
|title = Photometry and models of selected main belt asteroids. II. 173 Ino, 376 Geometria, and 451 Patientia
|journal = Astronomy and Astrophysics
|volume = 443
|issue = 1
|pages = 329–335
|bibcode = 2005A&A...443..329M
|doi = 10.1051/0004-6361:20053656
|doi-access= free
}}</ref>

<ref name="Warner-2007i">{{Cite journal
|author = Warner, Brian D.
|date = December 2007
|title = Initial Results of a Dedicated H-G Project
|url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2007MPBu...34..113W
|journal = The Minor Planet Bulletin
|volume = 34
|issue = 4
|pages = 113–119
|issn = 1052-8091
|bibcode = 2007MPBu...34..113W
|access-date= 18 April 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
|journal = Icarus
|volume = 261
|pages = 34–47
|bibcode = 2015Icar..261...34V
|doi = 10.1016/j.icarus.2015.08.007
|arxiv = 1506.00762
}}</ref>

}} 

== 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|173}}
* {{JPL small body}}

{{Minor planets navigator |172 Baucis |number=173 |174 Phaedra}}
{{Small Solar System bodies}}
{{Authority control}}

{{DEFAULTSORT:000173}}
[[Category:Astronomical objects discovered in 1877|18770801]]
[[Category:Discoveries by Alphonse Borrelly|Ino]]
[[Category:Ino asteroids]]
[[Category:Named minor planets|Ino]]
[[Category:C-type asteroids (Tholen)]]
[[Category:Xk-type asteroids (SMASS)]]

173 Ino - Revision history

imported>Shocksingularity: Adding local short description: "Main-belt asteroid", overriding Wikidata description "main-belt asteroid"