Near-Earth Object (436724) 2011 UW158 on 2015-06-14

Background 

The Near-Earth Object (436724) 2011 UW158 (Orbit type: Amor [PHA]) was first observed by  Pan-STARRS 1 (MPC Code F51)  on 2011-10-25. This asteroid has an absolute magnitude of 19.4 which would give it an approximate diameter of 350 m to 780 m (1148.29 feet to 2559.06 feet).


(436724) 2011 UW158 will safely make a close approach to earth on 2015-July-19

JPL Close-Approach Data (as of 2015-06-14)

• Time: 2015-Jul-19 14:37 (TDB)

• Time Uncertainty (minutes):  0.194594878659734

• Minimum Distance (AU) : 0.0164395502542242 (6.398 LD) 1,528,151.665 Miles (2,459,321.713 KM)

• Nominal Distance (AU):   0.0164399372059977 (6.398 LD) 1,528,187.634 Miles (2,459,379.600 KM)

• Maximum Distance (AU): 0.0164403241618221 (6.398 LD) 1,528,223.604 Miles (2,459,437.488 KM)

• Maximum-Minimum = 71.939 Miles (115.775 KM)

Near Earth Objects Dynamic Site Close-Approach Data (as of 2015-06-14)

• Date: 2015/07/19.60917

• Min possible distance (au): 0.0164398 (6.398 LD) 1,528,174.88 Miles (2,459,359.075 KM)

• Nominal distance (au): 0.0164399 (6.398 LD) 1,528,184.176 Miles (2,459,374.034 KM)

• Nominal - Min =  9.296 Miles (14.95899 KM)

Asteroid radar observations have been schedule for (436724) 2011 UW158 2015 Jul 13-26 at Goldstone 2015 Jul 12-17 at Arecibo with the goal of high resolution imaging.

Observing Run on  2015-06-14

On 2015-06-14 I  ran a series of 30 -- 60 Second Luminance BIN2 Images on itelescope.net's (TEL T09 0.32-m f/9.3 Ritchey-Chretien + CCD + f/7.4 focal reducer) at Siding Spring Observatory, Coonabarabran, NSW, Australia. (MPC Q62) and did data reduction on six images.

Astrometrica object verification window( for 1 of 30)  60 Second Luminance BIN2 image taken with itelescope.net's (TEL T09  0.32-m f/9.3 Ritchey-Chretien + CCD + f/7.4 focal reducer)  at Siding Spring Observatory, Coonabarabran, NSW, Australia. (MPC Q62)  (see  NOTE below on digital artifact.)

NOTE: A digital artifact appeared in three images (1,2,and 3) "near" (436724) 2011 UW158 however it was within 0.3 a pixels of have the SAME Pixel Coordinate (x/y) in ALL three images -- I dither the images so this could ruled out-- it being anything in orbit.

Astrometrica object verification window ( for 6 of 30) 60 Second Luminance BIN2 image taken with itelescope.net's (TEL T09  0.32-m f/9.3 Ritchey-Chretien + CCD + f/7.4 focal reducer)  at Siding Spring Observatory, Coonabarabran, NSW, Australia. (MPC Q62)

Astrometrica object verification window  ( for 12 of 30) 60 Second Luminance BIN2 image taken with itelescope.net's (TEL T09  0.32-m f/9.3 Ritchey-Chretien + CCD + f/7.4 focal reducer)  at Siding Spring Observatory, Coonabarabran, NSW,
Australia. (MPC Q62)

Astrometrica object verification window  ( for 18 of 30) 60 Second Luminance BIN2 image taken with itelescope.net's (TEL T09  0.32-m f/9.3 Ritchey-Chretien + CCD + f/7.4 focal reducer)  at Siding Spring Observatory, Coonabarabran, NSW, Australia. (MPC Q62)

Astrometrica object verification window ( for 24 of 30) 60 Second Luminance BIN2 image taken with itelescope.net's (TEL T09  0.32-m f/9.3 Ritchey-Chretien + CCD + f/7.4 focal reducer)  at Siding Spring Observatory, Coonabarabran, NSW, Australia. (MPC Q62)

Astrometrica object verification window (for 30 of 30) 60 Second Luminance BIN2 image taken with itelescope.net's (TEL T09  0.32-m f/9.3 Ritchey-Chretien + CCD + f/7.4 focal reducer)  at Siding Spring Observatory, Coonabarabran, NSW, Australia. (MPC Q62)

Other links:

• The Discovery M.P.E.C.:  MPEC 2011-U90 : 2011 UW158
• MPEC 2015-L43 : DAILY ORBIT UPDATE (2015 JUNE 14 UT)
• Goldstone Radar Observations Planning: 2011 UW158, 1994 AW1, 1999 JD6, and 2003 NZ6
• Near-Earth Object Human Space Flight Accessible Targets Study (NHATS)
• Near Earth Objects Dynamic Site--(436724) 2011UW158 
•  (MPC) Observations   
• NEO Earth Close Approaches (JPL)