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● M a i n p a g e
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● R a n d o m a r t i c l e
● A b o u t W i k i p e d i a
● C o n t a c t u s
● D o n a t e
C o n t r i b u t e
● H e l p
● L e a r n t o e d i t
● C o m m u n i t y p o r t a l
● R e c e n t c h a n g e s
● U p l o a d f i l e
S e a r c h
Search
A p p e a r a n c e
● C r e a t e a c c o u n t
● L o g i n
P e r s o n a l t o o l s
● C r e a t e a c c o u n t
● L o g i n
P a g e s f o r l o g g e d o u t e d i t o r s l e a r n m o r e
● C o n t r i b u t i o n s
● T a l k
( T o p )
1
R e f e r e n c e s
2
E x t e r n a l l i n k s
T o g g l e t h e t a b l e o f c o n t e n t s
( 3 0 8 2 4 2 ) 2 0 0 5 G O 21
5 l a n g u a g e s
● ا ل ع ر ب ي ة
● F r a n ç a i s
● B a h a s a I n d o n e s i a
● M i n a n g k a b a u
● Р у с с к и й
E d i t l i n k s
● A r t i c l e
● T a l k
E n g l i s h
● R e a d
● E d i t
● V i e w h i s t o r y
T o o l s
T o o l s
A c t i o n s
● R e a d
● E d i t
● V i e w h i s t o r y
G e n e r a l
● W h a t l i n k s h e r e
● R e l a t e d c h a n g e s
● U p l o a d f i l e
● S p e c i a l p a g e s
● P e r m a n e n t l i n k
● P a g e i n f o r m a t i o n
● C i t e t h i s p a g e
● G e t s h o r t e n e d U R L
● D o w n l o a d Q R c o d e
● W i k i d a t a i t e m
P r i n t / e x p o r t
● D o w n l o a d a s P D F
● P r i n t a b l e v e r s i o n
P r i n t / e x p o r t
I n o t h e r p r o j e c t s
● W i k i m e d i a C o m m o n s
A p p e a r a n c e
F r o m W i k i p e d i a , t h e f r e e e n c y c l o p e d i a
T h i s i s a n o l d r e v i s i o n o f t h i s p a g e , a s e d i t e d b y I l v o n ( t a l k | c o n t r i b s ) at 0 4 : 0 5 , 1 3 O c t o b e r 2 0 1 5 . T h e p r e s e n t a d d r e s s ( U R L ) i s a p e r m a n e n t l i n k t o t h i s r e v i s i o n , w h i c h m a y d i f f e r s i g n i f i c a n t l y f r o m t h e c u r r e n t r e v i s i o n .
( d i f f ) ← P r e v i o u s r e v i s i o n | L a t e s t r e v i s i o n ( d i f f ) | N e w e r r e v i s i o n → ( d i f f )
Based on an absolute magnitude of 16.4,[2] the asteroid has an estimated diameter of 1.6 km (within a factor of two).[3] (308242) 2005 GO21 is the largest potentially hazardous asteroid (PHA) discovered in 2005.[4] On 21 June 2012 it passed Earth at a distance of 0.043963 AU (6,576,800 km ; 4,086,600 mi ).[5] The 2012 passage was studied with radar using Goldstone and Arecibo .[3]
References
^ a b c d Dr. Lance A. M. Benner (2012-06-18). "(308242) 2005 GO21 Goldstone Radar Observations Planning" . NASA/JPL Asteroid Radar Research. Retrieved 2012-06-18 .
^ "JPL Small-Body Database Search Engine: PHAs and H < 17 (mag)" . JPL Solar System Dynamics. Retrieved 2011-11-20 .
^ "JPL Close-Approach Data: 308242 (2005 GO21)" (last observation: 2012-06-17; arc : 7.21 years). Retrieved 2012-06-18 .
External links
R e t r i e v e d f r o m " https://en.wikipedia.org/w/index.php?title=(308242)_2005_GO21&oldid=685490657 "
C a t e g o r i e s :
● A t e n a s t e r o i d s
● N e a r - E a r t h a s t e r o i d s
● R a d a r - i m a g e d a s t e r o i d s
● A s t r o n o m i c a l o b j e c t s d i s c o v e r e d i n 2 0 0 5
● N e a r - E a r t h o b j e c t s i n 2 0 1 2
H i d d e n c a t e g o r y :
● P a g e s u s i n g i n f o b o x p l a n e t w i t h u n k n o w n p a r a m e t e r s
● T h i s p a g e w a s l a s t e d i t e d o n 1 3 O c t o b e r 2 0 1 5 , a t 0 4 : 0 5 ( U T C ) .
● T h i s v e r s i o n o f t h e p a g e h a s b e e n r e v i s e d . B e s i d e s n o r m a l e d i t i n g , t h e r e a s o n f o r r e v i s i o n m a y h a v e b e e n t h a t t h i s v e r s i o n c o n t a i n s f a c t u a l i n a c c u r a c i e s , v a n d a l i s m , o r m a t e r i a l n o t c o m p a t i b l e w i t h t h e C r e a t i v e C o m m o n s A t t r i b u t i o n - S h a r e A l i k e L i c e n s e .
● P r i v a c y p o l i c y
● A b o u t W i k i p e d i a
● D i s c l a i m e r s
● C o n t a c t W i k i p e d i a
● C o d e o f C o n d u c t
● D e v e l o p e r s
● S t a t i s t i c s
● C o o k i e s t a t e m e n t
● M o b i l e v i e w