1373 Cincinnati

Template:Short description Template:Use dmy dates {{#invoke:infobox|infoboxTemplate | class = vcard | titleclass = fn org | title = 1373 Cincinnati | image = {{#invoke:InfoboxImage|InfoboxImage|image=|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" />

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

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

| data21 = | data22 = {{#if:27 April 2019 (JD 2458600.5) |Epoch 27 April 2019 (JD 2458600.5)}} | data23 = {{#if:0 | Uncertainty parameter 0}} | label24 = Observation arc | data24 = 82.62 yr (30,176 d) | label25 = Earliest precovery date | data25 = | label26 = {{#switch:{{{apsis}}} |apsis|gee|barion|center|centre|(apsis)=Apo{{{apsis}}} |Ap{{#if:|{{{apsis}}}|helion}}}} | data26 = 4.4958 AU | label27 = Peri{{#if:|{{{apsis}}}|helion}} | data27 = 2.3457 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 = 3.4208 AU | label33 = Template:Longitem | data33 = | label34 = Eccentricity | data34 = 0.3143 | label35 = Template:Longitem | data35 = 6.33 yr (2,311 d) | label36 = Template:Longitem | data36 = | label37 = Template:Longitem | data37 = | label38 = Template:Longitem | data38 = 98.044° | label39 = Template:Longitem | data39 = Template:Deg2DMS / day | label40 = Inclination | data40 = 38.936° | label41 = Template:Longitem | data41 = | label42 = Template:Longitem | data42 = 297.47° | label43 = Template:Longitem | data43 = | label44 = Template:Longitem | data44 = | label45 = Template:Longitem | data45 = 99.148° | 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 = 2.7190

| 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 = | label72 = Template:Longitem | data72 = Template:Val<ref name="Mainzer-2016" /><ref name="Masiero-2014" />
Template:Val<ref name="WISE" />
Template:Val<ref name="AKARI" /> | 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" /> | 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="AKARI" />
Template:Val<ref name="WISE" />
Template:Val<ref name="Mainzer-2016" /><ref name="Masiero-2014" /> | label94 = Temperature | data94 =

| 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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1373 Cincinnati, provisional designation Template:Mp, is an asteroid in a comet-like orbit from the Cybele region,<ref name=De_Prá_et_al_2018/> located at the outermost rim of the asteroid belt, approximately Template:Convert in diameter. It was the only asteroid discovery made by famous American astronomer Edwin Hubble, while observing distant galaxies at Mount Wilson Observatory in California on 30 August 1935.<ref name="MPC-object" /> The rather spherical X-type asteroid has a rotation period of 5.3 hours.<ref name="lcdb" /> It was named for the Cincinnati Observatory.<ref name="MPC-object" />

Orbit and classificationEdit

Cincinnati orbits the Sun in the outermost asteroid belt at a distance of 2.3–4.5 AU once every 6 years and 4 months (2,311 days; semi-major axis of 3.42 AU). Its orbit has an eccentricity of 0.31 and an inclination of 39° with respect to the ecliptic.<ref name="jpldata" /> The body's observation arc begins with its official discovery observation at Mount Wilson in August 1935.<ref name="MPC-object" />

Cincinnati, a non-family asteroid of the main belt's background population,<ref name="AstDys-object" /> is located in the orbital region of the Cybele asteroids, the last outpost of an extended asteroid belt beyond the Hecuba-gap asteroids. Due to its high inclination, and contrary to all other Cybele asteroids, Cincinnati is the only one that is above the center of the ν₆ secular resonance with Saturn.<ref name="Carruba-2015" />Template:Rp The asteroid's high inclination and eccentricity also results in a Tisserand's parameter (T_Jupiter) of 2.719, which makes it a true asteroid in cometary orbit (ACO) for having a T_Jupiter value below 3.<ref name="Licandro-2008" />

NamingEdit

Recommended by the Minor Planet Center, this minor planet was named after the Cincinnati Observatory, whose staff provided most of the orbit computations. The official Template:MoMP was published by the Minor Planet Center on 31 January 1962 (Template:Small).<ref name="DoMP-Circular-dates" />

Physical characteristicsEdit

In the SMASS classification, Cincinnati is a Xk-type, a subtype that transitions from the X-type to the uncommon K-type asteroids,<ref name="Ferret" /> while the Wide-field Infrared Survey Explorer classifies it as a metallic M-type asteroid.<ref name="lcdb" /><ref name="WISE" /> By 2014, Cincinnati is the only of three Cybele asteroids for which a spectral type has been determined; the other two are 522 Helga and 692 Hippodamia, an X- and S-type, respectively.<ref name="Carruba-2015" />Template:Rp

Rotation periodEdit

In January 2018, a rotational lightcurve of Cincinnati was obtained from photometric observations by Henk de Groot.<ref name="geneva-obs" /> Lightcurve analysis gave a rotation period of Template:Val hours and a brightness variation of 0.10 magnitude (Template:Small).<ref name="geneva-obs" /> The low brightness amplitude is indicative that is asteroid is rather spherical than elongated in shape.

Alternative period determinations were made by French amateur astronomer René Roy (5.274 h; Δ0.21 mag) in August 2004 (Template:Small).<ref name="geneva-obs" /> Two more lightcurves were obtained by Brian Warner at this Palmer Divide Observatory in Colorado, United States, in August 2004 and August 2010, who measured a period of 4.930 and 5.28 hours with an amplitude of 0.11 and 0.14 magnitude, respectively.<ref name="Warner-2005a" /><ref name="Warner-2011a" />Template:Efn

Diameter and albedoEdit

According to the survey carried out by the NEOWISE mission of NASA's WISE telescope, Cincinnati measures between 19.4 and 19.8 kilometers in diameter and its surface has an albedo of 0.15–0.16,<ref name="Mainzer-2016" /><ref name="Masiero-2014" /><ref name="WISE" /> while the Japanese Akari satellite determined a diameter of 22.16 kilometers with an albedo of 0.12.<ref name="AKARI" /> The Collaborative Asteroid Lightcurve Link assumes a standard albedo for a carbonaceous asteroid of 0.057 and calculates a diameter of 27.9 kilometers based on an absolute magnitude of 11.5.<ref name="lcdb" />

NotesEdit

Template:Notelist

ReferencesEdit

Template:Reflist

External linksEdit

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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