Erriapus

Template:Short description Template:About {{#invoke:infobox|infoboxTemplate | class = vcard | titleclass = fn org | title = Erriapus | image = {{#invoke:InfoboxImage|InfoboxImage|image=Erriapus-discovery-CFHT.gif|upright={{#if:||1.1}}|alt=}} | caption = Discovery images of Erriapus taken by the CFHT in September 2000 | headerstyle = {{#if:|background-color:|background-color:#E0CCFF}} | labelstyle = max-width:{{#if:||11em}}; | autoheaders = y

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

| label11 = Template:Longitem | data11 = Saturn XXVIII | label12 = Pronunciation | data12 = Template:IPAc-en | label13 = Template:Longitem | data13 = Erriap(p)us | label14 = Template:Longitem | data14 = S/2000 S 10 | label15 = Template:Longitem | data15 = | label16 = Adjectives | data16 = | label17 = Symbol | data17 =

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

| data21 = | data22 = {{#if:2000 January 1.5 |Epoch 2000 January 1.5}} | data23 = {{#if: | Uncertainty parameter {{{uncertainty}}}}} | label24 = Observation arc | data24 = | label25 = Earliest precovery date | data25 = | label26 = {{#switch:{{{apsis}}} |apsis|gee|barion|center|centre|(apsis)=Apo{{{apsis}}} |Ap{{#if:|{{{apsis}}}|helion}}}} | data26 = | label27 = Peri{{#if:|{{{apsis}}}|helion}} | data27 = | 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 = 17 507 200 km | label33 = Template:Longitem | data33 = | label34 = Eccentricity | data34 = 0.462 | label35 = Template:Longitem | data35 = 871.1 d
(2.38 yr) | label36 = Template:Longitem | data36 = | label37 = Template:Longitem | data37 = | label38 = Template:Longitem | data38 = | label39 = Template:Longitem | data39 = | label40 = Inclination | data40 = 38.7 | label41 = Template:Longitem | data41 = | label42 = Template:Longitem | data42 = | label43 = Template:Longitem | data43 = | label44 = Template:Longitem | data44 = | label45 = Template:Longitem | data45 = | label46 = Template:Nowrap | data46 = | label47 = Satellite of | data47 = Saturn | label48 = Group | data48 = Gallic group | 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 =

| header60 = Proper orbital elements

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({{#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:| Physical characteristics|Physical characteristics}}<ref name="LPSC2654">Template:Cite conference</ref><ref name="Denk2018"/>

| label71 = Dimensions | data71 = 16.30 × 10 × 6.34 km (modeled)<ref>Template:Cite journal</ref> | label72 = Template:Longitem | data72 = Template:Val | 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 h | 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: |Template:Longitem |Albedo}} | data93 = 0.06 (assumed) | label94 = Temperature | data94 =

| data100 = {{#if:|

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Surface temp.	min	mean	max
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| label101 = Surface absorbed dose rate | data101 = | label102 = Surface equivalent dose rate | data102 = | label103 = Template:Longitem | data103 = light red
B−V=0.83, R−V=0.49<ref name="Grav2003" /> | label104 = Template:Longitem | data104 = | label105 = Template:Longitem | data105 = 23.0 | label106 = Template:Longitem | data106 = 13.7 | label107 = Template:Longitem | data107 =

| header110 = Atmosphere

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Erriapus Template:IPAc-en, or Saturn XXVIII (28), is a prograde irregular satellite of Saturn. It was discovered by Brett Gladman, John J. Kavelaars and colleagues in 2000, and given the temporary designation S/2000 S 10.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref><ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> It was named Erriapo in August 2003<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> after Erriapus (also rendered Erriappus), a giant in Gaulish mythology; the name was changed from dative Erriapo to nominative Erriapus per IAU conventions in late 2007.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref><ref>IAUC 9191: SATURN XXVIII (ERRIAPUS) January 11, 2011</ref>

Erriapus is about 10 kilometres in diameter, and orbits Saturn at an average distance of 17.5 Gm in 871 days.

As a member of the Gallic group of irregular satellites, which share similar orbital characteristics and a light-red colour, Erriapus is hypothesized to have its origin in the break-up of a common progenitor of the group,<ref name="Grav2003">Template:Cite journal</ref><ref name="Gladman2001">Template:Cite journal</ref> or to be a fragment of its largest member, Albiorix.<ref name="Grav20062">Template:Cite journal</ref> It has a rotation period of Template:Val, and is thought to rotate on its side, giving it similar seasons to those of Uranus.<ref>Template:Cite journal</ref><ref>Template:Cite conference</ref> With a fairly elongated shape, it is a candidate for a contact binary or binary moon.<ref name="Denk2018">Template:Cite book</ref>

External links

• David Jewitt pages