90 Antiope
90 IAntiope yeyona asteroid yebhanti engundoqo. Ifunyaniswe ngo-1866, ine- orbit ephawulwe yi-semi-major axis elingana no-M ukusuka kwi- eccentricity ye-0.1660765, ethambekele ngo-2.20691 ° ngokubhekiselele kwi-ecliptic. I-C-type encinci yeplanethi, ene- carbonaceous composition kunye nobumnyama obumnyama kakhulu, ehlelwa njengelungu lentsapho yaseThemis asteroid.
I-Antiope yafunyanwa nguKarl Theodor Robert Luther (ngoncedo lwetshathi yesibhakabhaka eyakha ngokwakhe) malunga ne-10.30 pm ngo-1 Oktobha 1866 ukusuka kwi- Düsseldorf Observatory (efumaneka kwisithili sasedolophini saseBilk) eJamani, apho wayengumlawuli ukususela ngoku. 1851 [1] Kwabizwa ngokuba yi-Antiope ngokuhlonipha enye yezi zibini (akucaci ukuba yeyiphi) amanani abizwa ngokuba yi-homonymous kwi -mythology yamaGrike.
Ngo-Agasti 10, 2000, lezazi ngeenkwenkwezi eziquka:
- W.J. Merline weZiko loPhando loMzantsi-ntshona (SRI)
- Ukuvalwa kwe-LM ye- European Southern Observatory (ESO)
- JC Shelton waseMount Wilson Observatory
- C. Dumas weJet Propulsion Laboratory (JPL)
- F. Menard we -Canada-France-Hawaii Telescope (CFHT)
- CR Chapman kunye ne-DC Slater ye-SRI
ngenxa yoqwalaselo olwenziwe ngeKeck II Telescope eMauna Kea kunye nokusebenzisa i-adaptive optics, wafumanisa ukuba iAntiope yibinary asteroid, eyenziwe ngamalungu amabini ahlukeneyo; ukufunyanwa kwabhengezwa ngo-Oktobha 3, 2000.
Amacandelo amabini ("okwesibini" atyunjwe S/2000 (90) 1) omabini ane (ngokutenxa ngaphantsi kwe-2.5%) idiameter elingana ne-110 ± 16 km kunye nobukhulu bawo buhluke nge-0.1 kuphela; chaza i- orbit eccentric kancinane (0.01 ± 0.02) ejikeleze iziko eliqhelekileyo, lahlulwe yi-170 ± 1 km (0.12", 60 ± 16 umgama weekhilomitha phakathi kwemiphezulu).
Izifundo ezincedisayo kumahluko wegophe lokukhanya olwenziwa kusetyenziswa i-adaptive optics ye -ESO 's Very Large Telescope ibonisa ukuba la malungu mabini ajikeleza kumbindi wobunzima nge-16.5268 ± 0.0001 iiyure. Ubunzima babo kunye nobuninzi babo bunokuvela ngokulula kumthetho wesithathu kaKepler . Uxinzelelo oluphantsi ngokwentelekiso (0.6 ± 0.2 g/cm³) icebisa i -porosity ephezulu yeplanethi (ngaphezulu kwe-60%).
Zili-9 ubugqi obuqatshelwe ukusukela ngo-1988, uninzi lwayo bubugqi bezinto ezininzi. [2]