98 Ianthe

Template:Short description Template:Use dmy dates {{#invoke:infobox|infoboxTemplate | class = vcard | titleclass = fn org | title = 98 Ianthe | image = {{#invoke:InfoboxImage|InfoboxImage|image=98Ianthe (Lightcurve Inversion).png|upright={{#if:||1.1}}|alt=}} | caption = Three-dimensional model of 98 Ianthe created based on light-curve. | headerstyle = {{#if:#D6D6D6|background-color:#D6D6D6|background-color:#E0CCFF}} | labelstyle = max-width:{{#if:||11em}}; | autoheaders = y

| header1 = Discovery

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

| header20 = Orbital characteristics{{#ifeq:|yes| (barycentric)}}<ref name="jpldata">{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>

| data21 = | data22 = {{#if:31 July 2016 (JD 2457600.5) |Epoch 31 July 2016 (JD 2457600.5)}} | data23 = {{#if:0 | Uncertainty parameter 0}} | label24 = Observation arc | data24 = 145.23 yr (53047 d) | label25 = Earliest precovery date | data25 = | label26 = {{#switch:{{{apsis}}} |apsis|gee|barion|center|centre|(apsis)=Apo{{{apsis}}} |Ap{{#if:|{{{apsis}}}|helion}}}} | data26 = Template:Convert | label27 = Peri{{#if:|{{{apsis}}}|helion}} | data27 = Template:Convert | 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 = Template:Convert | label33 = Template:Longitem | data33 = | label34 = Eccentricity | data34 = 0.18586 | label35 = Template:Longitem | data35 = 4.41 yr (1610.0 d) | label36 = Template:Longitem | data36 = | label37 = Template:Longitem | data37 = 18.01 km/s | label38 = Template:Longitem | data38 = 262.019° | label39 = Template:Longitem | data39 = Template:Deg2DMS / day | label40 = Inclination | data40 = 15.5778° | label41 = Template:Longitem | data41 = | label42 = Template:Longitem | data42 = 354.000° | label43 = Template:Longitem | data43 = | label44 = Template:Longitem | data44 = | label45 = Template:Longitem | data45 = 158.686° | 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 = Template:Convert | label52 = Mercury MOID | data52 = | label53 = Venus MOID | data53 = | label54 = Mars MOID | data54 = | label55 = Jupiter MOID | data55 = Template:Convert | label56 = Saturn MOID | data56 = | label57 = Uranus MOID | data57 = | label58 = Neptune MOID | data58 = | label59 = T_Jupiter | data59 = 3.296

| 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}}} deg Template:\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}}} arcsec Template:\yr }} | label67 = Template:Longitem | data67 = {{#if:|{{{node_rate}}} arcsec Template:\yr}}

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

| label71 = Dimensions | data71 = Template:Val<ref name="jpldata"/>
106.16 ± 3.76 km<ref name="Carry2012"/> | label72 = Template:Longitem | data72 = | label73 = Template:Longitem | data73 = | label74 = Template:Longitem | data74 = | label75 = Template:Longitem | data75 = | label76 = Flattening | data76 = | label77 = Circumference | data77 = | label78 = Template:Longitem | data78 = | label79 = Volume | data79 = | label80 = Mass | data80 = Template:Nowrap | label81 = Template:Longitem | data81 = 1.42 ± 0.35 g/cm³<ref name="Carry2012"/> | label82 = Template:Longitem | data82 = 0.0292 m/s² | label83 = Template:Longitem | data83 = | label84 = Template:Longitem | data84 = 0.0552 km/s | label85 = Template:Longitem | data85 = Template:Convert<ref name="jpldata"/><ref name="Pilcher2008"/> | 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 = Template:Val<ref name="jpldata"/>
0.047 <ref>Asteroid Data Sets Template:Webarchive</ref> | label94 = Temperature | data94 = ~170 K

| data100 = {{#if:|

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

}}

| header110 = Atmosphere

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

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98 Ianthe is a large main-belt asteroid, named for three figures in Greek mythology. It is very dark and is composed of carbonates. It was one of the numerous (for his time—the 19th century) discoveries by C. H. F. Peters, who found it on April 18, 1868, from Clinton, New York.

This body is orbiting the Sun with a period of 4.41 years and an eccentricity of 0.186. The orbital plane is inclined at an angle of 15.6° to the plane of the ecliptic. Measurements of the cross-section dimension yield a size of around 105 km. Photometric observations of this asteroid during 2007 at the Organ Mesa Observatory in Las Cruces, New Mexico were used to create a light curve plot. This showed a synodic rotation period of Template:Val hours and a brightness variation of Template:Val magnitude during each cycle.<ref name="Pilcher2008"/> It is classified as a C-type asteroid, indicating a dark, carbonaceous surface.

The detection of a candidate moon orbiting 98 Ianthe was announced in 2004.<ref name=Venable2004/>

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