2019 OK

2019 OK – Žemei artimas asteroidas, 2019 m. liepos 24 d. praskriejęs arti Žemės (mažiausias nuo planetos paviršiaus skyręs atstumas – 65 000 km). Tai didžiausias aptiktas asteroidas, praskriejęs taip arti Žemės (2022 m. duomenimis).[1]

Atradimas

Asteroidą SONAR observatorijoje, esančioje Brazilijoje, Minas Žeraiso valstijoje, pirmieji aptiko astronomai mėgėjai Cristovao Jacques, Eduardo Pimentel ir Joao Ribeiro de Barros. Dangaus kūnas atrastas tą pačią dieną, kai praskriejo arti Žemės.[1]

2019 OK aptikti sunku buvo dėl keleto priežasčių. Šio asteroido orbita labai elipsiška, arti Žemės ir aptinkamas šiuolaikiniais teleskopais jis būna ganėtinai trumpą laiką. 2019 OK artėjant prie Žemės, jo padėtis danguje buvo tokia, kad iki pat paskutinių keleto dienų neatrodė, jog asteroidas pastebimai judėtų. Galiausiai iš paskutinių dienų dangaus nuotraukų tapo aišku, kad jis juda.[1]

Duomenys

Tai Apolono grupės asteroidas. 2019 OK skersmuo siekia 60–130 m. Jo nuotolis nuo Saulės svyruoja nuo 0,46 av iki 3,4 av, kitaip tariant, nuo apytikriai 68,9 mln. km iki 509 mln. km.[1]

Saulę 2019 OK apskrieja per 2,72 m. (993 paras). Šio dangaus kūno orbita labai elipsinė, tad vienu metu jis skrieja arčiau Saulės nei Venera, kitu – toliau nei Marsas.[1]

Per mažiausiai 200 ateinančių metų 2019 OK nepraskries taip arti Žemės, kaip 2019 m.[1]

Išnašos

  1. ↑ 1,0 1,1 1,2 1,3 1,4 1,5 2019 OK. NASA. Nuoroda tikrinta 2022-07-31.

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