Lagniappe Observing: (436724) 2011 UW158

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Jul 10, 2015

The Near-Earth Object (436724) 2011 UW158 on 2015-07-09

Background

(as of 2015-07-09)

Object: (436724) 2011 UW158
Approximate Diameter: 330 m - 750 m (1082.68 feet to 2460.63 feet)( Absolute Magnitude: H= 19.5 )
Orbit Type: Amor [PHA] (JPL listed it as an Apollo, MPC list as an Amor)
On the Sentry Risk Table: NO ( Removed 2011-11-17 08:50 UTC )
On the NEODyS CLOMON2 risk page: NO
First Observed on: 2011-10-25.41860
First Observed By: Pan-STARRS 1 (MPC Code F51) (The Discovery M.P.E.C.: MPEC 2011-U90 : 2011 UW158 )
Last Observed: 2015-07-09.18879
Data-Arc Span: 1353 days (3.70 yr)
Number Oppositions : 4
Number of Observations Made: 213
Next Close-Approach: will safely pass Earth on 2015-Jul-19 at a Nominal Distance of 0.016440038277755 (AU), (6.398 Lunar Distance (LD)) or 1,528,197.03 miles (2,459,394.72 KM)
Near-Earth Object Human Space Flight Accessible Targets Study (NHATS): YES
On the Goldstone Asteroid Schedule: YES, Dates: 2015 July 13-26 ( Needs Astrometry: Yes Physical Observations: Yes)
On the Arecibo Asteroid Schedule: YES, Dates: 2015 July 12-17 (Request Optical Astrometry: No, Request Optical Lightcurve:Yes, Request Optical Characterization Yes) and 2015 August 29(Request Optical Astrometry: No, Request Optical Lightcurve:No, Request Optical Characterization No)

Observing Run of (436724) 2011 UW158 on 2015-07-01

On 2015-07-01 I ran a series of 60 -- 15 Second Luminance BIN2 Images on itelescope.net's (TEL T31

0.50-m f/6.8 astrograph + CCD + f/4.5 focal reducer) at Siding Spring Observatory, Coonabarabran, NSW, Australia. (MPC Q62) and did data reduction on four images.

Astrometrica object verification window ( for image 1 of 60) 15 Second Luminance BIN2 image taken with itelescope.net's (TEL T31 0.50-m f/6.8 astrograph + CCD + f/4.5 focal reducer) at Siding Spring Observatory, Coonabarabran, NSW, Australia. (MPC Q62)

Astrometrica object verification window ( for image 18 of 60) 15 Second Luminance BIN2 image taken with itelescope.net's (TEL T31 0.50-m f/6.8 astrograph + CCD + f/4.5 focal reducer) at Siding Spring Observatory, Coonabarabran, NSW, Australia. (MPC Q62)

Astrometrica object verification window ( for image 36 of 60) 15 Second Luminance BIN2 image taken with itelescope.net's (TEL T31 0.50-m f/6.8 astrograph + CCD + f/4.5 focal reducer) at Siding Spring Observatory, Coonabarabran, NSW, Australia. (MPC Q62)

Astrometrica object verification window ( for image 56 of 60) 15 Second Luminance BIN2 image taken with itelescope.net's (TEL T31 0.50-m f/6.8 astrograph + CCD + f/4.5 focal reducer) at Siding Spring Observatory, Coonabarabran, NSW, Australia. (MPC Q62) --after this image clouds moved in.

Video Data: The Near-Earth Object (436724) 2011 UW158 on 2015-07-09 From from Siding Spring Observatory, Coonabarabran, NSW, Australia. (MPC Q62) 56 -- 15 Second Luminance BIN2 Images using iTelescope.net's (Telescope T31) from 2015-07-09 10:26 UTC to 10:58 UTC

Jul 2, 2015

Near-Earth Object (436724) 2011 UW158 on 2015-07-01 --- and (32259) 2000 OT53 .... as a little lagniappe

Background

(as of 2015-07-01)

Object: (436724) 2011 UW158
Approximate Diameter: 330 m - 750 m (1082.68 feet to 2460.63 feet)( Absolute Magnitude: H= 19.5 )
Orbit Type: Amor [PHA] (JPL listed it as an Apollo, MPC list as an Amor)
On the Sentry Risk Table: NO ( Removed 2011-11-17 08:50 UTC )
On the NEODyS CLOMON2 risk page: NO
First Observed on: 2011-10-25
First Observed By: Pan-STARRS 1 (MPC Code F51) (The Discovery M.P.E.C.: MPEC 2011-U90 : 2011 UW158 )
Last Observed: 2015-06-29
Data-Arc Span: 1343 days (3.68 yr)
Number Oppositions : 4
Number of Observations Made: 188
Next Close-Approach: 2015-Jul-19, Nominal Distance (AU): 0.0164400368561532, (6.398 Lunar Distance (LD)) or 1,528,196.897 miles (2,459,394.508 KM)
Near-Earth Object Human Space Flight Accessible Targets Study (NHATS): YES
On the Goldstone Asteroid Schedule: YES, Dates: 2015 July 13-26 ( Needs Astrometry: Yes Physical Observations: Yes)
On the Arecibo Asteroid Schedule: YES, Dates: 2015 July 12-17 (Request Optical Astrometry: No, Request Optical Lightcurve:Yes, Request Optical Characterization Yes) and 2015 August 29(Request Optical Astrometry: No, Request Optical Lightcurve:No, Request Optical Characterization No)

Observing Run of (436724) 2011 UW158 on 2015-07-01

On 2015-07-01 I ran a series of 30 -- 60 Second Luminance BIN2 Images on itelescope.net's (TEL T27 0.70-m f/6.6 CDK astrograph + CCD) at Siding Spring Observatory, Coonabarabran, NSW, Australia. (MPC Q62) and did data reduction on four images.

Astrometrica object verification window ( for image 1 of 30) 60 Second Luminance BIN2 image taken with itelescope.net's (TEL T27 0.70-m f/6.6 CDK astrograph + CCD) at Siding Spring Observatory, Coonabarabran, NSW, Australia. (MPC Q62)

Astrometrica object verification window ( for image 7 of 30) 60 Second Luminance BIN2 image taken with itelescope.net's (TEL T27 0.70-m f/6.6 CDK astrograph + CCD) at Siding Spring Observatory, Coonabarabran, NSW, Australia. (MPC Q62)

Astrometrica object verification window ( for image 14 of 30) 60 Second Luminance BIN2 image taken with itelescope.net's (TEL T27 0.70-m f/6.6 CDK astrograph + CCD) at Siding Spring Observatory, Coonabarabran, NSW, Australia. (MPC Q62)

Astrometrica object verification window ( for image 20 of 30) 60 Second Luminance BIN2 image taken with itelescope.net's (TEL T27 0.70-m f/6.6 CDK astrograph + CCD) at Siding Spring Observatory, Coonabarabran, NSW, Australia. (MPC Q62)

The main-belt asteroid (32259) 2000 OT53 was also in FOV ( 27.1 x 27.1 arc-mins) of and within limiting magnitude of the Fits.

Background

(as of 2015-07-01)

Object: (32259) 2000 OT53
Alternate Designations : 2000 OT53 = 1988 NV = 1999 NH13 ( as more observations are made and the "known" orbit improves and the orbit maybe link to the orbit another provisional designation which turns out to be same object.)
Approximate Diameter: 11 km - 24 km (6.83508 miles to14.9129 miles)( Absolute Magnitude: H= 12.0 )
Orbit Type: Main-belt Asteroid
First Observed on: 1988-07-12
Last Observed(publish): 2015-06-12
Data-Arc Span: 9812 days (26.864 yr)
Number Oppositions : 15
Number of Observations Made(publish): 885

Jun 20, 2015

Near-Earth Object (436724) 2011 UW158 on 2015-06-20

Background

(as of 2015-06-20)

Object: (436724) 2011 UW158
Approximate Diameter: 330 m - 750 m (1082.68 feet to 2460.63 feet)( Absolute Magnitude: H= 19.5 )
Orbit Type: Amor [PHA] (JPL listed it as an Apollo, MPC list as an Amor)
On the Sentry Risk Table: NO ( Removed 2011-11-17 08:50 UTC )
On the NEODyS CLOMON2 risk page: NO
First Observed on: 2011-10-25
First Observed By: Pan-STARRS 1 (MPC Code F51) (The Discovery M.P.E.C.: MPEC 2011-U90 : 2011 UW158 )
Last Observed: 2015-06-20
Data-Arc Span: 1334 days (3.65 yr)
Number Oppositions : 4
Number of Observations Made: 185
Next Close-Approach: 2015-Jul-19, Nominal Distance (AU): 0.016439695228839, (6.398 Lunar Distance (LD)) or 1,528,165.141 miles (2,459,343.401 KM)
Near-Earth Object Human Space Flight Accessible Targets Study (NHATS): YES
On the Goldstone Asteroid Schedule: YES, Dates: 2015 July 13-26 ( Needs Astrometry: Yes Physical Observations: Yes)
On the Arecibo Asteroid Schedule: YES, Dates: 2015 July 12-17 (Request Optical Astrometry: No, Request Optical Lightcurve:Yes, Request Optical Characterization Yes) and 2015 August 29(Request Optical Astrometry: No, Request Optical Lightcurve:No, Request Optical Characterization No)

Observing Run of (436724) 2011 UW158 on 2015-06-20

On 2015-06-20 I ran a series of 30 -- 60 Second Luminance BIN2 Images on itelescope.net's (TEL T9 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 four images.

Astrometrica object verification window ( for image 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)

Astrometrica object verification window ( for image 10 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 image 20 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)

Jun 15, 2015

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)

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Jul 10, 2015

The Near-Earth Object (436724) 2011 UW158 on 2015-07-09

Jul 2, 2015

Near-Earth Object (436724) 2011 UW158 on 2015-07-01 --- and (32259) 2000 OT53 .... as a little lagniappe

Jun 20, 2015

Near-Earth Object (436724) 2011 UW158 on 2015-06-20

Jun 15, 2015

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