2006 DD1

2006 DD1
planétka
Objav
ObjaviteľR. Hill
Dátum objavu22. február 2006
Označenia2006 DD1
KategóriaSkupina Apollo, Mars križujúce
Elementy dráhy
Epocha 22. február 2006
Excentricita (e)0,6629
Veľká polos (a)344,119 823 Gm (2,3003 AU)
Perihélium (q)116,006 483 Gm (0,7755 AU)
Afélium (Q)572,233 162 Gm (3,8251 AU)
Obežná doba (P)1274,32 d (3,4889 a)
Priemerná obežná rýchlosť0,2825°/deň
Uhol sklonu dráhy
k ekliptike (i)
8,4244°
Dĺžka výstupného uzla (Ω)154,1566°
Argument perihélia (ω)63,0370°
Stredná anomália (M)351,7055°
Fyzikálne vlastnosti
Rozmery~20 m
Hmotnosť? kg
Hustota? g/cm³
Povrchová gravitácia? m/s²
Úniková rýchlosť? km/s
Rotačná perióda? d
Spektrálna trieda?
Absolútna veľkosť26,538
Albedo?
Priemerná povrchová teplota? K

2006 DD1 je planétka zo skupiny Apollo, patriaca súčasne medzi Mars križujúce planétky a objekty pravidelne sa približujúce k Zemi (NEO). Jej dráha nie je doposiaľ definitívne určená, preto jej nebolo doteraz pridelené katalógové číslo.

Popis objektu

Vzhľadom na to, že bola pozorovaná iba krátko počas najväčšieho priblíženia, nebolo možné uskutočniť spektroskopický výskum. Preto o jej chemickom zložení nie je nič známe. Jej priemer je odhadovaný na základe hviezdnej veľkosti a pretože nie je známe ani albedo jej povrchu, je preto do veľkej miery neistý.

História

Planétku objavil 22. februára 2006 okolo 06:22 svetového času (UTC) 0,68metrovým Schmidtovým ďalekohľadom s kamerou CCD v rámci programu Catalina Sky Survey astronóm R. Hill. Nasledujúceho dňa o 06:56 UTC preletela v minimálnej vzdialenosti 117,5 tis. km od stredu Zeme. Zaradila sa tak v rebríčku na 7. miesto najbližších preletov planétok.

Výhľad do budúcnosti

Zo znalostí súčasných elementov dráhy planétky vyplýva, že minimálna vypočítaná vzdialenosť medzi jej dráhou a dráhou Zeme je 57 tis. km. Aj keď patrí k blízkozemským planétkam, nemôže v dohľadnej dobe Zem ohroziť. V 21. storočí sa síce vráti do blízkosti Zeme trikrát, a to v rokoch 2013, 2058 a 2079, ale nikdy sa nepriblíži na viac ako 12,5 mil. km.

Externé odkazy

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