Kometa Shoemaker-Levy 9 míří k Jupiteru
Tato dvojice snímků byla pořízena na observatoři La Silla a zachycuje jednotlivé fragmenty komety Shoemaker-Levy 9, která se pohybuje na kolizním kurzu s planetou Jupiter
Širokoúhlou fotografii (vlevo dole) pořídili Klaus Jockers a Galina Chernova (Max-Planck-Institute fur Aeronomie, Katlenburg, Lindau, Německo) 1. května 1994. Expozice o délce 5 minut v červené části spektra byla pořízena CCD kamerou a zařízením MPIfAe/Hoher List focal reducer na dalekohledu ESO 1-metre telescope. Dobře patrné je jádro komety rozlámané na desítky fragmentů (struktura bývá označována jako ‚šňůra perel‘) a také množství prachu osvětlované Sluncem (v pravé části výřezu). V době pořízení snímku se kometa nacházela 654 milionů kilometrů od Země a délka celé struktury (od prvního jádra k poslednímu) dosahovala 5,3‘ (úhlové minuty), což odpovídá asi 1 milionu kilometrů.
Další snímek s expozicí 15 minut byl pořízem za účelem astrometrie jednotlivých fragmentů 11. května 1994 a získal ho Jean-Francois Claeskens pomocí dalekohledu Danish 1.5 m telescope na Observatoři La Silla. Zde je uveřejněn ve větším rozměru, aby vynikly jednotlivé, obzvláště slabé, fragmenty. Jasný objekt vpravo nahoře je hvězda 10 mag. Povšimněte si, že hvězdy v poli jsou trochu protažené, jelikož dalekohled byl nastaven tak, aby sledoval pohyb komety mezi hvězdami. Prvním fragmentem, který zasáhne Jupiter bude jádro označené A, posledním W. Kometa se nacházela 657 kilometrů od Země a celá struktura rozpadlého jádra byla o něco delší, asi 5,8‘, což odpovídá 1,1 milionů kilometrů.
Technické informace:
Širokoúhlý snímek: 1,5“/pixel, 5,1“/mm, velikost pole 12,2‘ x 6,6‘, expozice 5 minut, gunn-r filtr
Detailní snímek: 0,38“/pixel, 1,3“/mm; velikost pole 6,4‘ x 4,4‘, expozice 15 minut, V-filtr
Sever je nahoře, východ vlevo, snímky byly pořízeny za průměrného seeingiu (neklidu atmosféry).
ESO
O snímku
| Id: | eso9410a |
| Jazyk: | cs |
| Typ: | Pozorování |
| Datum zveřejnění: | 20. května 1994 |
| Související články: | eso9410 |
| Velikost: | 397 x 266 px |
O objektu
| Jméno: | Comet Shoemaker-Levy 9 |
| Typ: | Solar System : Interplanetary Body : Comet |
Barvy & filtry
| Pásmo | Dalekohled |
|---|---|
| Optický R | ESO 1-metre telescope |
| Optický V | Danish 1.54-metre telescope |
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