163 Erigone

Template:Short description Template:Use dmy dates {{#invoke:infobox|infoboxTemplate | class = vcard | titleclass = fn org | title = 163 Erigone | image = {{#invoke:InfoboxImage|InfoboxImage|image=000163-asteroid shape model (163) Erigone.png|upright={{#if:||1.1}}|alt=}} | caption = 3D convex shape model of 163 Erigone | 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 = 123.56 yr (45131 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 = 0.19064 | label35 = Template:Longitem | data35 = 3.64 yr (1330.5 d) | label36 = Template:Longitem | data36 = | label37 = Template:Longitem | data37 = | label38 = Template:Longitem | data38 = 280.031° | label39 = Template:Longitem | data39 = Template:Deg2DMS / day | label40 = Inclination | data40 = 4.8148° | label41 = Template:Longitem | data41 = | label42 = Template:Longitem | data42 = 160.166° | label43 = Template:Longitem | data43 = | label44 = Template:Longitem | data44 = | label45 = Template:Longitem | data45 = 298.260° | 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 = 3.518

| 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"/>
72.70 ± 1.95 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 = 9.99 ± 3.45 g/cm³<ref name="Carry2012"/> | label82 = Template:Longitem | data82 = | label83 = Template:Longitem | data83 = | label84 = Template:Longitem | data84 = | label85 = Template:Longitem | data85 = Template:Convert<ref name=Pilcher_et_al_2014/> | 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"/>
0.0428 ± 0.0092 <ref name="Pravec2012"/> | label94 = Temperature | data94 =

| data100 = {{#if:|

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

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| header110 = Atmosphere

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

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163 Erigone is an asteroid from the asteroid belt and the namesake of the Erigone family of asteroids that share similar orbital elements and properties. It was discovered by French astronomer Henri Joseph Perrotin on April 26, 1876, and named after one of the two Erigones in Greek mythology. This asteroid is orbiting the Sun at a distance of Template:Val with a period of Template:Convert and an eccentricity (ovalness) of 0.19. The orbital plane is inclined at an angle of 4.8° to the plane of the ecliptic.<ref name="jpldata"/>

Photometric measurements taken in 2014 were used to construct a lightcurve that demonstrated a rotation period of Template:Val with an amplitude of Template:Val in magnitude.<ref name=Pilcher_et_al_2014/> Erigone is a relatively large and dark asteroid with an estimated size of 73 km.<ref name="Carry2012"/> Based upon its spectrum, it is classified as a C-type asteroid,<ref name="Pravec2012"/> which indicates that it probably has a carbonaceous composition. It is the largest member of the eponymously named Erigone collisional family.<ref name=Morate_et_al_2016/>

2014 occultation of RegulusEdit

File:Outline map of the path of the shadow of asteroid (163) Erigone as it occults Regulus on March 20, 2014.jpg

Path of occultation from New York to Ontario

In the early morning hours of March 20, 2014, Erigone occulted the first-magnitude star Regulus,<ref name=IOTA2006/> as first predicted by Aldo Vitagliano in 2004 using the SOLEX software.<ref name=Solex/> This would have been a rare case of an occultation of a very bright star visible from a highly populated area, since the shadow path moved across New York state and Ontario, including all five boroughs of New York City.<ref name="Solex"/> Observers in the shadow path would have seen the star wink out for as long as 14 seconds.<ref name="IOTA2006"/><ref name="IOTA2014"/>

However, thick clouds and rain blocked the view for most if not all people on the shadow path.<ref>Asteroid eclipse rained out Space.com 2014 March 20</ref> The website of the International Occultation Timing Association does not list any successful observations at all.<ref>Regulus 2014 Template:Webarchive International Occultation Timing Association</ref>

Two single chord Asteroid Occultation events have been observed, in 2013 and 2015.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>

ReferencesEdit

Template:Reflist

External linksEdit

Template:Minor planets navigator {{#invoke:Navbox|navbox}} Template:2014 in space Template:Authority control

vec:Lista de asteroidi#163 Erigona