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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
( R e d i r e c t e d f r o m 2 0 1 9 X S )
(679648) 2019 XS is a small Apollo near-Earth asteroid discovered on 2 December 2019 by the Mount Lemmon Survey in Arizona , United States .[2] It passed 1.493 lunar distances (574,000 km; 357,000 mi ) from Earth on 9 November 2021 at 03:48 UTC , after which observations were checked by the International Asteroid Warning Network for timing and astrometric accuracy.[7] [8] [9] During the close pass, the asteroid trailed across the far Southern Hemisphere to the Northern Hemisphere and reached a peak apparent magnitude of 13. A total of 957 observations were collected by Minor Planet Center as part of the International Asteroid Warning Network's campaign.[10]
2019 XS is well-observed with a long observation arc of over 21 years, enough to distinguish subtle changes in its orbit over time due non-gravitational acceleration by the Yarkovsky effect .[4] [10] Highly precise radar observations by NASA 's Goldstone Solar System Radar on 11 November 2021 have significantly constrained the asteroid's orbit and 2021 close approach distance to within a few kilometres.[4] Radar imaging has shown that the asteroid is roughly 70 m (230 ft ) in diameter, with a rotation period around 3 hours.[5]
Continuous photometric observations by the Center for Solar System Studies in Landers, California show an irregular light curve for 2019 XS, signifying that the asteroid is in a tumbling rotation state.[6] The light curve of 2019 XS appears to display two overlapping periods of 2.35 and 3.01 hours, which could possibly be associated with the asteroid's rotation and precession .[6]
See also
[ edit ]
2012 TC4 , another near-Earth asteroid with a dedicated IAWN timing campaign
References
[ edit ]
^ "2019 XS" . NEO Exchange . Las Cumbres Observatory . 5 October 2021. Retrieved 12 October 2021 .
^ a b c d e "JPL Small-Body Database Browser: (2019 XS)" (2021-12-09 last obs.). Jet Propulsion Laboratory . Retrieved 7 January 2022 .
^ a b Benner, Lance A. M. "Goldstone Radar Observations Planning: Orpheus, 2004 UE, 2019 XS, and 2010 VK139" . Jet Propulsion Laboratory . California Institute of Technology. Retrieved 12 November 2021 .
^ a b c d Warner, Brian D.; Stephens, Robert D. (April 2022). "Near-Earth Asteroid Lightcurve Analysis at the Center for Solar System Studies: 2021 October-December" . The Minor Planet Bulletin . 49 (2 ): 83–89. Bibcode :2022MPBu...49...83W .
^ "2019 XS: Timing Assessment" . International Asteroid Warning Network. 3 October 2021. Retrieved 12 October 2021 .
^ "MPEC 2021-T79 : International Asteroid Warning Network (IAWN) Timing Campaign" . Minor Planet Electronic Circular . Minor Planet Center . 5 October 2021. Retrieved 12 October 2021 .
^ "MPEC 2020-V63 : 2019 XS" . Minor Planet Electronic Circular . Minor Planet Center . 10 November 2020. Retrieved 12 October 2021 .
^ a b Farnocchia, Davide; Reddy, Vishnu; Bauer, James M.; Warner, Elizabeth M.; Micheli, Marco; Payne, Matthew J.; et al. (July 2022). "International Asteroid Warning Network Timing Campaign: 2019 XS" . The Planetary Science Journal . 3 (7 ): 13. Bibcode :2022PSJ.....3..156F . doi :10.3847/PSJ/ac7224 . hdl :10045/125567 . 156.
External links
[ edit ]
Outer Space
R e t r i e v e d f r o m " https://en.wikipedia.org/w/index.php?title=(679648)_2019_XS&oldid=1220408551 "
C a t e g o r i e s :
● M i n o r p l a n e t o b j e c t a r t i c l e s ( n u m b e r e d )
● A p o l l o a s t e r o i d s
● D i s c o v e r i e s b y M L S
● N e a r - E a r t h o b j e c t s i n 2 0 2 1
● 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 1 9
H i d d e n c a t e g o r i e s :
● A r t i c l e s w i t h s h o r t d e s c r i p t i o n
● S h o r t d e s c r i p t i o n w i t h e m p t y W i k i d a t a d e s c r i p t i o n
● U s e d m y d a t e s f r o m O c t o b e r 2 0 2 1
● J P L S m a l l - B o d y D a t a b a s e I D d i f f e r e n t f r o m W i k i d a t a
● A r t i c l e s w i t h J P L S B D B i d e n t i f i 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 2 3 A p r i l 2 0 2 4 , a t 1 6 : 2 0 ( U T C ) .
● T e x t i s a v a i l a b l e u n d e r 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 4 . 0 ;
a d d i t i o n a l t e r m s m a y a p p l y . B y u s i n g t h i s s i t e , y o u a g r e e t o t h e T e r m s o f U s e a n d P r i v a c y P o l i c y . W i k i p e d i a ® i s a r e g i s t e r e d t r a d e m a r k o f t h e W i k i m e d i a F o u n d a t i o n , I n c . , a n o n - p r o f i t o r g a n i z a t i o n .
● 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
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