183 Istria

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Template:Short description Template:Use dmy dates {{#invoke:infobox|infoboxTemplate | class = vcard | titleclass = fn org | title = 183 Istria | image = {{#invoke:InfoboxImage|InfoboxImage|image=183Istria (Lightcurve Inversion).png|upright={{#if:||1.1}}|alt=}} | caption = Lightcurve-based 3D-model of Istria | headerstyle = {{#if:#D6D6D6|background-color:#D6D6D6|background-color:#E0CCFF}}; color:inherit; | labelstyle = max-width:{{#if:||11em}}; | autoheaders = y

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

| label2 = Discovered by | data2 = J. Palisa | label3 = Discovery site | data3 = Austrian Naval Obs. | label4 = Discovery date | data4 = 8 February 1878 | label5 = Template:Longitem | data5 =

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

| label11 = Template:Longitem | data11 = (183) Istria | label12 = Pronunciation | data12 = Template:IPAc-en<ref>Noah Webster (1884) A Practical Dictionary of the English Language</ref> | label13 = Template:Longitem | data13 = Istrian Peninsula<ref name="springer" />
Template:Small | label14 = Template:Longitem | data14 = A878 CD; 1948 CG | label15 = Template:Longitem | data15 = main-belt<ref name="MPC-object" /><ref name="jpldata" />Template:·Template:Small
background<ref name="Ferret" /><ref name="AstDys-object" /> | label16 = Adjectives | data16 = | 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 = 112.08 yr (40,937 d) | label25 = Earliest precovery date | data25 = | label26 = {{#switch:{{{apsis}}} |apsis|gee|barion|center|centre|(apsis)=Apo{{{apsis}}} |Ap{{#if:|{{{apsis}}}|helion}}}} | data26 = 3.7699 AU | label27 = Peri{{#if:|{{{apsis}}}|helion}} | data27 = 1.8117 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 = 2.7908 AU | label33 = Template:Longitem | data33 = | label34 = Eccentricity | data34 = 0.3508 | label35 = Template:Longitem | data35 = 4.66 yr (1,703 d) | label36 = Template:Longitem | data36 = | label37 = Template:Longitem | data37 = | label38 = Template:Longitem | data38 = 61.603° | label39 = Template:Longitem | data39 = Template:Deg2DMS / day | label40 = Inclination | data40 = 26.391° | label41 = Template:Longitem | data41 = | label42 = Template:Longitem | data42 = 141.95° | label43 = Template:Longitem | data43 = | label44 = Template:Longitem | data44 = | label45 = Template:Longitem | data45 = 264.12° | 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 = TJupiter | 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="WISE" />
Template:Val<ref name="Masiero-2014" />
Template:Val<ref name="AKARI" />
Template:Val<ref name="SIMPS" /> | 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 = | label81 = Template:Longitem | data81 = | label82 = Template:Longitem | data82 = | label83 = Template:Longitem | data83 = | label84 = Template:Longitem | data84 = | label85 = Template:Longitem | data85 = Template:Val<ref name="geneva-obs" />
Template:Val<ref name="Harris-1983a" /> | 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="SIMPS" />
Template:Val<ref name="AKARI" />
Template:Val<ref name="Masiero-2014" />
Template:Val<ref name="WISE" /> | 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 = S<ref name="jpldata" />
SMASS = S<ref name="jpldata" /><ref name="lcdb" />
S<ref name="Belskaya-2017" /><ref name="Veres-2015" />
B–V = 0.842<ref name="jpldata" />
U–B = 0.359<ref name="jpldata" /> | label104 = Template:Longitem | data104 = | label105 = Template:Longitem | data105 = | label106 = Template:Longitem | data106 = Template:Val<ref name="Veres-2015" />
9.66<ref name="Harris-1983a" />
9.68<ref name="jpldata" /><ref name="lcdb" /><ref name="WISE" /><ref name="AKARI" /><ref name="SIMPS" /> | 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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183 Istria is a stony background asteroid from the central regions of the asteroid belt, approximately Template:Convert in diameter. It was discovered on 8 February 1878, by Austrian astronomer Johann Palisa at the Austrian Naval Observatory in Pola, in what is now Croatia.<ref name="MPC-object" /> The S-type asteroid has a rotation period of 11.77 hours.<ref name="lcdb" /> It was named for the Istrian Peninsula.<ref name="springer" />

Orbit and classification

Istria is a non-family asteroid from the main belt's background population.<ref name="Ferret" /><ref name="AstDys-object" /> It orbits the Sun in the central main-belt at a distance of 1.8–3.8 AU once every 4 years and 8 months (1,703 days; semi-major axis of 2.79 AU). Its orbit has an eccentricity of 0.35 and an inclination of 26° with respect to the ecliptic.<ref name="jpldata" />

Physical characteristics

Istria has been characterized as a common, stony S-type asteroid in both the Tholen and SMASS classification.<ref name="jpldata" />

Rotation period

In August 1979, a rotational lightcurve of Istria was obtained from photometric observations by American astronomer Alain Harris. Lightcurve analysis gave a well-defined rotation period of 11.77 hours with a brightness amplitude of 0.31 magnitude (Template:Small).<ref name="Harris-1983a" /> Observations by French amateur astronomer Laurent Bernasconi gave a similar period of 11.6 hours (Template:Small).<ref name="geneva-obs" />

Diameter and albedo

According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Istria measures between 30.779 and 35.43 kilometers in diameter and its surface has an albedo between 0.1890 and 0.2582.<ref name="WISE" /><ref name="Masiero-2014" /><ref name="AKARI" /><ref name="SIMPS" />

Naming

This minor planet was named after the Istrian Peninsula in the Adriatic Sea, where the city of Pula (then Pola) with its discovering observatory is located. A the time the peninsula was part of the Austro-Hungarian Empire. The asteroid's name was given by Vice-Admiral Bernhard von Wüllerstorf-Urbair, who is known as the captain of the first Austrian circumnavigatory adventure with the sail frigate SMS Novara.<ref name="springer" /> The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (Template:Small).<ref name="springer" />

References

Template:Reflist

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