173 Ino

Template:Use dmy dates {{#invoke:infobox|infoboxTemplate | class = vcard | titleclass = fn org | title = 173 Ino | image = {{#invoke:InfoboxImage|InfoboxImage|image=173 Ino VLT (2021), deconvolved.pdf|upright={{#if:||1.1}}|alt=}} | caption = | headerstyle = {{#if:#D6D6D6|background-color:#D6D6D6|background-color:#E0CCFF}} | labelstyle = max-width:{{#if:||11em}}; | autoheaders = y

| header1 = Discovery<ref name="MPC-object" />

| label2 = Discovered by | data2 = A. Borrelly | label3 = Discovery site | data3 = Marseille | label4 = Discovery date | data4 = 1 August 1877 | label5 = Template:Longitem | data5 =

| header10 = {{#if:|Designations|Designations}}

| label11 = Template:Longitem | data11 = (173) Ino | label12 = Pronunciation | data12 = Template:IPAc-en Template:Respell<ref>Noah Webster (1884) A Practical Dictionary of the English Language</ref> | label13 = Template:Longitem | data13 = Ἰνώ Īnṓ<ref name="springer" /> Template:Small | label14 = Template:Longitem | data14 = A877 PA; 1922 SB | label15 = Template:Longitem | data15 = main-belt<ref name="MPC-object" /><ref name="jpldata" />Template:·Template:Small
Ino<ref name="Ferret" /> | label16 = Adjectives | data16 = Inoan (Template:IPAc-en Template:Respell)<ref>George Stuart (1882) The Eclogues, Georgics, and Moretum of Virgil, p. 271</ref> | label17 = Symbol | data17 =

| header20 = Orbital characteristics{{#ifeq:|yes| (barycentric)}}<ref name="jpldata" />

| data21 = | data22 = {{#if:23 March 2018 (JD 2458200.5) |Epoch 23 March 2018 (JD 2458200.5)}} | data23 = {{#if:0 | Uncertainty parameter 0}} | label24 = Observation arc | data24 = 138.75 yr (50,678 d) | label25 = Earliest precovery date | data25 = | label26 = {{#switch:{{{apsis}}} |apsis|gee|barion|center|centre|(apsis)=Apo{{{apsis}}} |Ap{{#if:|{{{apsis}}}|helion}}}} | data26 = 3.3142 AU | label27 = Peri{{#if:|{{{apsis}}}|helion}} | data27 = 2.1708 AU | label28 = Peri{{#if:|{{{apsis}}}|apsis}} | data28 = | label29 = {{#switch:{{{apsis}}} |helion|astron=Ap{{{apsis}}} |Apo{{#if:|{{{apsis}}}|apsis}}}} | data29 = | label30 = Periastron | data30 = | label31 = Apoastron | data31 = | label32 = Template:Longitem | data32 = 2.7425 AU | label33 = Template:Longitem | data33 = | label34 = Eccentricity | data34 = 0.2085 | label35 = Template:Longitem | data35 = 4.54 yr (1,659 d) | label36 = Template:Longitem | data36 = | label37 = Template:Longitem | data37 = | label38 = Template:Longitem | data38 = 307.27° | label39 = Template:Longitem | data39 = Template:Deg2DMS / day | label40 = Inclination | data40 = 14.197° | label41 = Template:Longitem | data41 = | label42 = Template:Longitem | data42 = 148.18° | label43 = Template:Longitem | data43 = | label44 = Template:Longitem | data44 = | label45 = Template:Longitem | data45 = 228.89° | label46 = Template:Nowrap | data46 = | label47 = Satellite of | data47 = | label48 = Group | data48 = | label49 = {{#switch: |yes|true=Satellites |Known satellites}} | data49 = | label50 = Star | data50 = | label51 = Earth MOID | data51 = | label52 = Mercury MOID | data52 = | label53 = Venus MOID | data53 = | label54 = Mars MOID | data54 = | label55 = Jupiter MOID | data55 = | label56 = Saturn MOID | data56 = | label57 = Uranus MOID | data57 = | label58 = Neptune MOID | data58 = | label59 = T_Jupiter | data59 =

| header60 = Proper orbital elements

| label61 = Template:Longitem | data61 = {{#if: |{{{p_semimajor}}} AU}} | label62 = Template:Longitem | data62 = | label63 = Template:Longitem | data63 = | label64 = Template:Longitem | data64 = {{#if: |{{{p_mean_motion}}} degTemplate:\yr}} | label65 = Template:Longitem | data65 = {{#if:|{{#expr:360/1 round 5}} yr
({{#expr:365.25*360/1 round 3}} d) }} | label66 = Template:Longitem | data66 = {{#if:|{{{perihelion_rate}}} arcsecTemplate:\yr }} | label67 = Template:Longitem | data67 = {{#if:|{{{node_rate}}} arcsecTemplate:\yr}}

| header70 = Template:Anchor{{#if:yes| Physical characteristics|Physical characteristics}}

| label71 = Dimensions | data71 = | label72 = Template:Longitem | data72 = Template:Val<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>
Template:Val<ref name="Nugent-2016" />
Template:Val<ref name="Masiero-2012" />
Template:Val<ref name="Nugent-2015" />
Template:Val<ref name="SIMPS" />
Template:Val<ref name="AKARI" /> | label73 = Template:Longitem | data73 = | label74 = Template:Longitem | data74 = | label75 = Template:Longitem | data75 = | label76 = Flattening | data76 = 0.24Template:Efn | label77 = Circumference | data77 = | label78 = Template:Longitem | data78 = | label79 = Volume | data79 = | label80 = Mass | data80 = Template:Val<ref name=VLT/>
Template:Val<ref name="Carry-2012" /> | label81 = Template:Longitem | data81 = Template:Val<ref name=VLT/>
Template:Val<ref name="Carry-2012" /> | label82 = Template:Longitem | data82 = | label83 = Template:Longitem | data83 = | label84 = Template:Longitem | data84 = | label85 = Template:Longitem | data85 = Template:Val<ref name="Schober-1978b" />
Template:Val<ref name="geneva-obs" />
Template:Val<ref name="geneva-obs" />
Template:Val<ref name="geneva-obs" />
Template:Val<ref name="Erikson-1990" />
Template:Val<ref name="Gandolfi-2009" />
Template:Val<ref name="Michalowski-2005" />
Template:Val<ref name="Debehogne-1990" /><ref name="jpldata" />
Template:Val<ref name="Michalowski-1993" /> | label86 = Template:Longitem | data86 = | label87 = Template:Longitem | data87 = | label88 = Template:Longitem | data88 = | label89 = Template:Longitem | data89 = | label90 = Template:Longitem | data90 = | label91 = Template:Longitem | data91 = | label92 = Template:Longitem | data92 = | label93 = {{#if:yes |Template:Longitem |Albedo}} | data93 = 0.061 (calculated)<ref name=VLT/>
Template:Val<ref name="AKARI" />
Template:Val<ref name="Nugent-2015" />
Template:Val<ref name="SIMPS" />
Template:Val<ref name="Nugent-2016" />
Template:Val<ref name="Masiero-2012" /><ref name="jpldata" /> | label94 = Temperature | data94 =

| data100 = {{#if:|

{{#if:|}}{{#if:|}}{{#if:|}}{{#if:|}}

Surface temp.	min	mean	max
{{{temp_name1}}}
{{{temp_name2}}}
{{{temp_name3}}}
{{{temp_name4}}}

}}

| label101 = Surface absorbed dose rate | data101 = | label102 = Surface equivalent dose rate | data102 = | label103 = Template:Longitem | data103 = Tholen = C<ref name="jpldata" />
SMASS = Xk<ref name="jpldata" />
B–V = 0.705<ref name="jpldata" />
U–B = 0.305<ref name="jpldata" /> | label104 = Template:Longitem | data104 = | label105 = Template:Longitem | data105 = | label106 = Template:Longitem | data106 = 7.66<ref name="Masiero-2012" /><ref name="Nugent-2015" /><ref name="SIMPS" /><ref name="AKARI" /><ref name="lcdb" />
7.99<ref name="jpldata" />
Template:Val<ref name="Warner-2007i" />
7.90<ref name="Nugent-2016" /><ref name="Veres-2015" /> | label107 = Template:Longitem | data107 =

| header110 = Atmosphere

| label111 = Template:Longitem | data111 = | label112 = Template:Longitem | data112 = | label113 = Composition by volume | data113 =

| below = {{#if:||Template:Reflist }}

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173 Ino is a large asteroid and the parent body of the Ino family, located in the central regions of the asteroid belt, approximately Template:Convert 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 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 (Template:Small),<ref name="Ferret" /> an asteroid family in the intermediate main belt with nearly 500 known members.<ref name="Nesvorny-2014" />Template:Rp The adjectival form of the asteroid name is "Inoan".

It orbits the Sun in the central main-belt at a distance of 2.2–3.3 AU once every 4 years and 6 months (1,659 days; semi-major axis of 2.74 AU). Its orbit has an eccentricity of 0.21 and an inclination of 14° 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, while in the SMASS classification it is a Xk-subtype that transitions between the X-type and uncommon K-type asteroids.<ref name="jpldata" />

Multiple 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. The asteroid is rotating in a retrograde direction.<ref name="Michalowski-2005"/>

External links

• Asteroid Lightcurve Database (LCDB), query form (info Template:Webarchive)
• Dictionary of Minor Planet Names, Google books
• Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
• Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
• Template:AstDys
• Template:JPL small body

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