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TefiyaTethys Tefiya sfotografovana Kassini Dani pro vidkrittyaData vidkrittya 21 bereznya 1684Vidkrivach i Dzhovanni Domeniko KassiniPlaneta SaturnNomer IIIOrbitalni harakteristikiVelika pivvis 294 619 km 1 Orbitalnij period 1 887802 dibEkscentrisitet orbiti 0 000 2 Nahil orbiti 1 12 do ploshini ekvatora planeti 2 Fizichni harakteristikiVidima zoryana velichina vidima zoryana velichina Diametr 1076 8 1057 4 1052 6 km 3 Serednij radius 533 00 0 70 km 4 Masa 6 17449 0 00132 1020 kg 5 4 Gustina 0 9735 0 0038 g sm 4 Priskorennya vilnogo padinnya 0 145 m s Druga kosmichna shvidkist 0 393 km sPeriod obertannya navkolo svoyeyi osi 1 887802 dib 2 Nahil osi obertannya 0 Albedo 1 229 0 005 6 Temperatura poverhni 86 KAtmosfera vidsutnyaInshi poznachennyaSaturn IIITefiya u VikishovishiU Vikipediyi ye statti pro inshi znachennya cogo termina Tefiya Te fiya lat Tethys grec Th8ys p yatnadcyatij za viddalenistyu vid planeti suputnik Saturna Yiyi diametr stanovit blizko 1060 km Tefiya bula vidkrita Dzhovanni Kassini 1684 roku i otrimala im ya odniyeyi z titanid greckoyi mifologiyi Vidima zoryana velichina Tefiyi 10 2 7 Tefiya maye porivnyano nizku gustinu 0 98 g sm sho vkazuye na te sho vona skladayetsya perevazhno z vodyanogo lodu z maloyu domishkoyu girskih porid Yiyi poverhnya za spektroskopichnimi danimi skladayetsya z lodu majzhe povnistyu ale mistit trohi temnoyi rechovini nevidomogo skladu Poverhnya Tefiyi duzhe svitla ce drugij za albedo suputnik Saturna pislya Encelada i majzhe ne maye kolirnogo vidtinku Tefiya vkrita velikoyu kilkistyu krateriv najbilshij z yakih 450 kilometrovij Odissej en Cherez 3 4 suputnika prostyagayetsya veletenskij kanjon dovzhinoyu ponad 2000 km i shirinoyu blizko 100 km Itaka Ci dvi najbilshi detali relyefu mozhut buti pov yazani pohodzhennyam Neveliku chastinu poverhni Tefiyi zajmaye gladenka rivnina yaka mogla utvoritisya vnaslidok kriovulkanichnoyi aktivnosti Yak i inshi regulyarni suputniki Saturna Tefiya sformuvalasya z gazopilovogo diska sho otochuvav Saturn protyagom deyakogo chasu pislya jogo utvorennya Tefiya bula doslidzhena z blizkoyi vidstani kosmichnimi aparatami Pioner 11 1979 roku Voyadzher 1 1980 Voyadzher 2 1981 i Kassini pochinayuchi z 2004 roku Perebuvaye v orbitalnomu rezonansi z dvoma troyanskimi suputnikami Telesto i Kalipso Zmist 1 Vidkrittya j nazva 2 Orbita 3 Fizichni harakteristiki 4 Poverhnya 4 1 Kolir 4 2 Geologiya 4 3 Krateri ta vik 5 Utvorennya ta evolyuciya 6 Doslidzhennya 7 Div takozh 8 PrimitkiVidkrittya j nazva RedaguvatiTefiya bula vidkrita Dzhovanni Kassini 1684 roku razom iz Dionoyu inshim suputnikom Saturna Vidkrittya bulo zrobleno v Parizkij observatoriyi Kassini nazvav 4 vidkritih nim suputnika Saturna zoryami Lyudovika lat Sidera Lodoicea na chest korolya Franciyi Lyudovika XIV 8 Astronomi protyagom trivalogo chasu poznachali Tefiyu Saturn III tretij suputnik Saturna Suchasnu nazvu suputnika zaproponuvav Dzhon Gershel sin Vilyama Gershelya pershovidkrivacha Mimasa ta Encelada 9 1847 roku U svoyij publikaciyi rezultativ astronomichnih sposterezhen vid 1847 roku vikonanih na misi Dobroyi Nadiyi 10 Gershel zaproponuvav nazvati sim vidomih na toj chas suputnikiv Saturna imenami titaniv brativ i sester Kronosa analoga Saturna u greckij mifologiyi Tefiya otrimala nazvu titanidi Tefiyi Tefidi 9 donki Urana i Geyi druzhini Okeana Krim cogo vzhivayetsya poznachennya Saturn III abo S III Tefiya Orbita RedaguvatiOrbita Tefiyi prolyagaye na vidstani 295 000 km vid centra Saturna Ekscentrisitet orbiti neznachnij a yiyi nahil do ekvatora Saturna stanovit blizko 1 Tefiya perebuvaye v rezonansi z Mimasom yakij odnak ne viklikaye pomitnogo ekscentrisitetu orbiti i priplivnogo nagrivannya 11 Orbita Tefiyi lezhit gliboko vseredini magnitosferi Saturna Tefiya piddayetsya postijnomu bombarduvannya energijnimi chastinkami elektronami ta ionami yaki nayavni u magnitosferi 12 Tefiya maye dva malih rozmirom 20 km spivorbitalnih suputnika Telesto i Kalipso yaki roztashovuyutsya v tochkah Lagranzha orbiti Tefiyi L4 i L5 na 60 poperedu i pozadu neyi vidpovidno Fizichni harakteristiki Redaguvati nbsp Karta poverhni TefiyiPri diametri 1062 km Tefiya ye 16 m za rozmirom suputnikom u Sonyachnij sistemi Ce krizhane tilo shozhe na Dionu ta Reyu Tefiya maye nizku gustinu rechovini 0 984 0 003 g sm 13 sho vkazuye na te sho vona skladayetsya perevazhno z lodu 14 iz nevelikoyu domishkoyu girskoyi porodi Dosi nevidomo chi diferencijovana ru Tefiya na kam yane yadro i krizhanu mantiyu Masa kam yanogo yadra yaksho vono isnuye ne perevishuye 6 masi suputnika a jogo radius 145 km Cherez diyu priplivnih i vidcentrovih sil Tefiya maye formu trivisnogo elipsoyida Isnuvannya pidzemnogo okeanu ridkoyi vodi v nadrah Tefiyi vidayetsya malojmovirnim 15 Poverhnya Tefiyi duzhe svitla u vidimomu diapazoni za vizualnim albedo 1 229 vona druga v Sonyachnij sistemi pislya Encelada Jmovirno ce rezultat yiyi piskostrumenevoyi obrobki chastinkami kilcya E Saturna slabkogo kilcya z dribnih chastinok vodyanogo lodu utvorenih gejzerami pivdennoyi polyarnoyi zoni Encelada 16 Radiolokacijne albedo Tefiyi takozh ye duzhe visokim 17 Veducha pivkulya suputnika na 10 15 yaskravisha nizh vedena 18 Visoke albedo svidchit sho poverhnya Tefiyi skladayetsya z majzhe chistogo vodyanogo lodu z nevelikoyu kilkistyu temnoyi rechovini Spektr suputnika u vidimomu diapazoni ne maye pomitnih detalej a u blizhnomu ICh diapazoni na dovzhinah hvil 1 25 1 5 2 0 i 3 0 mkm mistit silni smugi poglinannya vodyanogo lodu 18 Krim lodu na Tefiyi nemaye identifikovanih spoluk 19 ale ye pripushennya pro nayavnist tam organichnih rechovin amiaku ta vuglekislogo gazu Temnij material maye ti zh spektralni vlastivosti sho j na poverhni inshih temnih suputnikiv Saturna Yapeta i Giperiona Najimovirnishe sho ce visokodispersne zalizo chi gematit 19 Vimiryuvannya teplovogo viprominyuvannya a takozh radiolokacijni sposterezhennya kosmichnogo aparatu Kassini pokazuyut sho krizhanij regolit na poverhni Tefiyi maye skladnu strukturu 17 j veliku poristist sho perevishuye 95 20 Poverhnya RedaguvatiDokladnishe Spisok detalej relyefu Tefiyi ru Kolir Redaguvati nbsp Karta Tefiyi u posilenih kolorah Livoruch chervonuvata vedena pivkulya pravoruch veducha pivkulya iz sinyuvatoyu smugoyuPoverhnya Tefiyi maye nizku velikomasshtabnih detalej sho vidriznyayutsya za kolorom a inodi j yaskravistyu Na vedenij pivkuli osoblivo poblizu yiyi centru poverhnya trohi chervonisha j temnisha nizh na veduchij 21 Veducha pivkulya takozh zlegka chervoniye do centru hocha j bez pomitnogo potemninnya 21 Takim chinom najsvitlisha i najmensh chervona poverhnya roztashovuyetsya na smuzi sho rozdilyaye ci pivkuli i prohodit po velikomu krugu cherez polyusi Take zabarvlennya poverhni ye tipovim dlya suputnikiv Saturna serednogo rozmiru Jogo pohodzhennya mozhe buti pov yazane z vidkladannyam chastinok lodu z kilcya E na veduchu perednyu pivkulyu i temnih chastinok sho nadhodyat iz zovnishnih suputnikiv Saturna na zadnyu pivkulyu Krim togo zatemnennyu zadnoyi pivkuli mozhe spriyati diya plazmi z magnitosferi Saturna yaka obertayetsya shvidshe suputnikiv z tim zhe periodom sho j planeta i otzhe oprominyuye yih zzadu 21 Geologiya Redaguvati Geologiya Tefiyi vidnosno prosta Yiyi poverhnya perevazhno gorbista i pokrita kraterami perevazhayut krateri diametrom ponad 40 km Nevelika chastina poverhni na zadnij pivkuli pokrita gladenkimi rivninami Ye tam i tektonichni strukturi kanjoni ta zapadini 22 U zahidnij chastini veduchoyi pivkuli Tefiyi dominuye udarnij krater Odissej en diametrom 450 km yakij ohoplyuye majzhe 2 5 diametra samoyi Tefiyi Krater narazi dovoli ploskij jogo dno lezhit majzhe na rivni poverhni suputnika Skorish za vse ce viklikano v yazkoyu relaksaciyeyu rozplyamlennyam krizhanoyi kori Tefiyi z geologichnim chasom Tim ne mensh kilcevij val Odisseya pidnyatij priblizno na 5 km nad serednim rivnem poverhni Tefiyi a jogo dno lezhit na 3 km nizhche cogo rivnya U centri Odisseya roztashovuyetsya zapadina 2 4 km glibinoyu v otochenni masiviv sho zdijmayutsya na 6 9 km nad dnom 22 19 nbsp Kanjon ItakaDruga golovna detal relyefu Tefiyi velicheznij kanjon Itaka Jogo dovzhina ponad 2000 km priblizno 3 4 dovzhini kola Tefiyi serednya glibina 3 km a shirina inkoli perevishuye 100 km 22 Cej kanjon zajmaye blizko 10 poverhni suputnika Odissej roztashovuyetsya majzhe u centri odniyeyi z pivkul na yaki kanjon podilyaye Tefiyu tochnishe na 20 vid cogo centra 19 Skorish za vse kanjon Itaka utvorivsya pri zatverdinni pidzemnogo okeanu Tefiyi v rezultati chogo nadra suputnika rozshirilisya i jogo poverhnya roztriskalasya Cej okean mig buti rezultatom orbitalnogo rezonansu 2 3 mizh Dionoyu i Tefiyeyu v rannij istoriyi Sonyachnoyi sistemi yakij viklikav pomitnij ekscentrisitet orbiti Tefiyi i yak naslidok priplivne nagrivannya yiyi nadr Koli Tefiya vijshla z rezonansu nagrivannya pripinilosya j okean zamerz 23 Vtim cya model stikayetsya z deyakimi trudnoshami 24 22 Isnuye she odna versiya formuvannya kanjona Itaka koli vidbulosya zitknennya yake utvorilo gigantskij krater Odissej po Tefiyi projshla udarna hvilya yaka prizvela do roztriskuvannya krizhanoyi poverhni U takomu vipadku kanjon Itaka zovnishnij kilcevij graben Odisseya 22 Odnak viznachennya viku za koncentraciyeyu krateriv pokazalo sho cej kanjon starshij za Odisseya sho nesumisno z gipotezoyu pro yih spilne utvorennya 19 24 nbsp Odissej velicheznij neglibokij krater zverhu poblizu terminatora Gladenki rivnini na zadnij pivkuli roztashovani priblizno na protilezhnomu boci vid Odisseya odnak voni prostyagayutsya priblizno do 60 na pivnichnij shid vid tochno protilezhnoyi tochki Rivnini mayut porivnyano rizku granicyu z navkolishnoyi kraterovanoyu miscevistyu Yih roztashuvannya poryad iz antipodom Odisseya mozhe buti oznakoyu yihnogo zv yazku z kraterom Mozhlivo ci rivnini utvorilisya cherez fokusuvannya sejsmichnih hvil yaki vinikli pri udari sho utvoriv Odissej u centri protilezhnoyi pivkuli Odnak gladkist rivnin ta yih rizki granici sejsmichni hvili utvorili b shiroki perehidni zoni vkazuyut na te sho voni utvoreni viverzhennyami z nadr mozhlivo vzdovzh rozlomiv litosferi Tefiyi yaki utvorilisya pri utvorenni Odisseya 19 Krateri ta vik Redaguvati Bilshist krateriv na Tefiyi mayut prostij centralnij pik Ti sho perevishuyut 150 km u diametri mayut skladnishi piki u viglyadi kilcya Lishe krater Odissej maye centralnu depresiyu yaka nagaduye centralnu yamu Stari krateri mensh gliboki nizh molodi sho pov yazano zi stupenem relaksaciyi kori 19 Koncentraciya krateriv na riznih dilyankah poverhni Tefiyi rizna i zalezhit vid yihnogo viku Chim starshoyu ye poverhnya tim bilshe na nij nakopichilosya krateriv Ce dozvolyaye vstanoviti vidnosnu hronologiyu dlya Tefiyi Silno kraterovana miscevist ye jmovirno najstarishoyu mozhlivo yiyi vik porivnyanij z vikom Sonyachnoyi sistemi blizko 4 56 mlrd rokiv 25 Najmolodshoyu strukturoyu ye krater Odissej za ocinkami jogo vik stanovit vid 3 76 do 1 06 mlrd rokiv zalezhno vid prijnyatoyi shvidkosti nakopichennya krateriv 25 Kanjon Itaka sudyachi z koncentraciyi krateriv davnishij vid Odisseya 24 Utvorennya ta evolyuciya RedaguvatiTefiya jmovirno sformuvalasya z akrecijnogo diska chi gazopilovoyi subtumannosti sho isnuvala bilya Saturna protyagom deyakogo chasu pislya jogo formuvannya 19 Temperatura v rajoni orbiti Saturna bula nizkoyu i ce oznachaye sho jogo suputniki formuvalisya z tverdogo lodu Jmovirno tam buli i letkishi spoluki taki yak amiak i vuglekislij gaz ale yih vmist nevidomij 11 Nadzvichajno visoka chastka vodyanogo lodu u skladi Tefiyi zalishayetsya ne poyasnenoyu Umovi subtumannosti Saturna mabut spriyali vidnovnim reakciyam v tomu chisli utvorennyu metanu z chadnogo gazu 26 Ce mozhe chastkovo poyasniti chomu suputniki Saturna v tomu chisli Tefiya mistyat bilshe lodu nizh zovnishni tila Sonyachnoyi sistemi taki yak Pluton chi Triton oskilki pri cij reakciyi vivilnyayetsya kisen yakij reaguyuchi z vodnem utvoryuye vodu 26 Odna z najcikavishih gipotez pripuskaye utvorennya kilec i vnutrishnih suputnikiv iz zrujnovanih priplivnimi silami velikih suputnikiv z visokim vmistom lodu v kori yak u Titana do togo yak voni buli poglinuti Saturnom 27 Akreciya jmovirno trivala dekilka tisyach rokiv do ostatochnogo formuvannya Tefiyi Pri comu zitknennya nagrivali yiyi zovnishnij shar Modeli pokazuyut sho temperatura dosyagala maksimumu blizko 155 K na glibini priblizno 29 km 28 Pislya zavershennya formuvannya za rahunok teploprovidnosti pripoverhnevij shar oholodzhuvavsya v toj chas yak vnutrishnij nagrivavsya 28 Oholodzheni pripoverhnevi shari stiskalisya v toj chas yak vnutrishni rozshiryuvalisya Ce viklikalo v kori Tefiyi silni napruzhennya roztyagu do 5 7 MPa sho jmovirno prizvelo do utvorennya trishin 29 U skladi Tefiyi duzhe malo skelnih porid Tomu v yiyi istoriyi navryad chi vidigravalo znachnu rol nagrivannya v rezultati rozpadu radioaktivnih elementiv 11 Ce takozh oznachaye sho Tefiya nikoli ne zaznavala znachnogo tanennya yaksho lishe yiyi nadra ne nagrivalisya priplivami Silni priplivi mogli vidbuvatisya pri znachnomu ekscentrisiteti orbiti yakij mig pidtrimuvatisya napriklad orbitalnim rezonansom z Dionoyu chi inshim suputnikom 11 Detalnih danih pro geologichnu istoriyu Tefiyi poki nemaye Doslidzhennya Redaguvati nbsp Animaciya obertannya Tefiyi1979 roku povz Saturn prolitav aparat Pioner 11 Maksimalne zblizhennya z Tefiyeyu 329 197 km vidbulosya 1 veresnya 1979 roku 30 31 Cherez rik 12 listopada 1980 roku Voyadzher 1 proletiv na minimalnij vidstani 415 670 km vid Tefiyi Jogo bliznyuk Voyadzher 2 26 serpnya 1981 proletiv blizhche na vidstani blizko 93 000 km 31 32 33 Voyadzher 1 peredav lishe odne zobrazhennya Tefiyi 34 z rozdilnistyu menshe 15 km a Voyadzher 2 sho proletiv blizhche do suputnika obijshov jogo majzhe navkolo 270 i peredav znimki z rozdilnistyu menshe 2 km 32 Pershoyu velikoyu detallyu poverhni viyavlenoyu na Tefiyi buv kanjon Itaka 33 Z usih suputnikiv Saturna Tefiya bula sfotografovana Voyadzherami najbilsh povno 22 2004 roku na orbitu navkolo Saturna vijshov aparat Kassini Pid chas svoyeyi osnovnoyi misiyi z chervnya 2004 po cherven 2008 roku vin zdijsniv odin duzhe blizkij cilovij prolit bilya Tefiyi 24 veresnya 2005 roku na vidstani 1503 km Piznishe Kassini vikonav she bagato necilovih zblizhen iz Tefiyeyu na vidstan poryadku desyatkiv tisyach kilometriv Vin bude robiti taki zblizhennya i nadali 31 35 16 36 Pid chas zblizhennya 14 serpnya 2010 roku vidstan 38 300 km buv detalno vidznyatij chetvertij za velichinoyu krater na Tefiyi Penelopa en diametr yakogo stanovit 207 km 37 Sposterezhennya Kassini dozvolili sklasti visokoyakisni karti Tefiyi z rozdilnistyu 0 29 km 13 Kosmichnij aparat otrimav spektri riznih dilyanok Tefiyi u blizhnomu infrachervonomu spektri yaki pokazuyut sho yiyi poverhnya skladayetsya z vodyanogo lodu zmishanogo z temnim materialom 18 Sposterezhennya v dalnomu infrachervonomu spektri dozvolili ociniti krajni mozhlivi znachennya bolometrichnogo albedo Bonda 38 Radiolokacijni sposterezhennya na dovzhini hvili 2 2 sm pokazali sho krizhanij regolit maye skladnu strukturu i duzhe poristij 17 Sposterezhennya plazmi v okoli Tefiyi vkazuyut na te sho vona ne vikidaye v magnitosferu Saturna yaku nebud plazmu 12 Pevnih planiv z doslidzhennya Tefiyi majbutnimi kosmichnimi aparatami poki nemaye Mozhlivo u 2020 roci v sistemu Saturna bude napravlena misiya Titan Saturn System Mission Div takozh RedaguvatiSuputniki Saturna Kalipso suputnik Telesto suputnik Vikishovishe maye multimedijni dani za temoyu Category TethysPrimitki Redaguvati Obchisleno vikoristovuyuchi znachennya m z http cfa www harvard edu iau NatSats NaturalSatellites html a b v Arhivovana kopiya Arhiv originalu za 9 bereznya 2005 Procitovano 8 kvitnya 2007 http www lpi usra edu meetings lpsc2006 pdf 1639 pdf a b v Jacobson R A Antreasian P G Bordi J J Criddle K E et al December 2006 The gravity field of the saturnian system from satellite observations and 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