1509 Esclangona

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

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

| data21 = | data22 = {{#if:4 September 2017 (JD 2458000.5) |Epoch 4 September 2017 (JD 2458000.5)}} | data23 = {{#if:0 | Uncertainty parameter 0}} | label24 = Observation arc | data24 = 77.68 yr (28,374 days) | label25 = Earliest precovery date | data25 = | label26 = {{#switch:{{{apsis}}} |apsis|gee|barion|center|centre|(apsis)=Apo{{{apsis}}} |Ap{{#if:|{{{apsis}}}|helion}}}} | data26 = 1.9263 AU | label27 = Peri{{#if:|{{{apsis}}}|helion}} | data27 = 1.8064 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 = 1.8663 AU | label33 = Template:Longitem | data33 = | label34 = Eccentricity | data34 = 0.0321 | label35 = Template:Longitem | data35 = 2.55 yr (931 days) | label36 = Template:Longitem | data36 = | label37 = Template:Longitem | data37 = | label38 = Template:Longitem | data38 = 225.08° | label39 = Template:Longitem | data39 = Template:Deg2DMS / day | label40 = Inclination | data40 = 22.320° | label41 = Template:Longitem | data41 = | label42 = Template:Longitem | data42 = 283.52° | label43 = Template:Longitem | data43 = | label44 = Template:Longitem | data44 = | label45 = Template:Longitem | data45 = 267.82° | label46 = Template:Nowrap | data46 = | label47 = Satellite of | data47 = | label48 = Group | data48 = | label49 = {{#switch: |yes|true=Satellites |Known satellites}} | data49 = 1<ref name="Merline-2003" /> | 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 =

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

| label71 = Dimensions | data71 = Template:Val km<ref name="Nugent-2015" />
Template:Val km<ref name="Nugent-2016" />
Template:Val km Template:Small<ref name="SIMPS" />
8.18 km Template:Small<ref name="lcdb" />
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Template:Val h<ref name="Warner-2005f" />
Template:Val h<ref name="Warner-2013m" />Template:Efn
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Template:Val hTemplate:Efn
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Template:Val<ref name="AKARI" />
Template:Val<ref name="Gil-Hutton-2007" />
0.2041 Template:Small<ref name="lcdb" />
Template:Val Template:Small<ref name="SIMPS" />
Template:Val<ref name="Nugent-2016" />
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| header110 = Atmosphere

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1509 Esclangona, provisional designation Template:Mp, is a rare-type Hungaria asteroid and binary system from the inner regions of the asteroid belt, approximately 8 kilometers in diameter. It is named after French astronomer Ernest Esclangon.

DiscoveriesEdit

Esclangona was discovered on 21 December 1938, by French astronomer André Patry at Nice Observatory. The body's observation arc begins with its official discovery observation as no precoveries were taken, and no prior identifications were made.<ref name="MPC-Esclangona" /> On 13 February 2003, a minor-planet moon in orbit of Esclangona was discovered by astronomers at ESO's Very Large Telescope (UT4) on Cerro Paranal in Chile.<ref name="springer" /><ref name="MPC-Esclangona" />

Orbit and classificationEdit

Esclangona is a member of the Hungaria family, which form the innermost concentration of asteroids in the Solar System. It orbits the Sun in the inner main-belt at a distance of 1.8–1.9 AU once every 2 years and 7 months (931 days). Its orbit has an eccentricity of 0.03 and an inclination of 22° with respect to the ecliptic.<ref name="jpldata" />

Binary systemEdit

Esclangona has a small moon, provisionally named Template:Mp, which measures 4 kilometers in diameter, and orbits 140 kilometers from its parent. This wide separation relative to the pair's size is rather unusual and it is believed that both Esclangona and its moon are ejecta from an asteroidal collision in the past that left the scene as a co-orbiting pair; a similar pairing is 3749 Balam and its moon.<ref name="Merline-2003" />

Physical characteristicsEdit

In the Tholen taxonomy, Esclangona is a common stony S-type asteroid. It has since been characterized as a rare K-type asteroid by polarimetric observations.<ref name="Belskaya-2017" />

Rotation periodEdit

In December 2004, photometric measurements of Esclangona made by American astronomer Brian Warner at his Palmer Divide Observatory, California, showed a lightcurve with a rotation period of Template:Val hours and a brightness variation of Template:Val in magnitude.<ref name="Warner-2005f"/>Template:Efn

Diameter and albedoEdit

According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Esclangona measures between 6.83 and 9.87 kilometers in diameter and its surface has an albedo between 0.107 and 0.41.<ref name="Nugent-2015" /><ref name="Nugent-2016" /><ref name="SIMPS" /><ref name="AKARI" /> The Collaborative Asteroid Lightcurve Link derives an albedo of 0.2041 and a diameter of 8.18 kilometers with an absolute magnitude of 12.858.<ref name="lcdb" />

NamingEdit

This minor planet was named after French astronomer Ernest Esclangon (1876–1954), was a director of the Paris Observatory and president of the International Astronomical Union. Naming citation was first mentioned in The Names of the Minor Planets by Paul Herget in 1955 (Template:Small).<ref name="springer" />

NotesEdit

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ReferencesEdit

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External linksEdit

Asteroids with Satellites, Robert Johnston, johnstonsarchive.net
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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