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Video astrometry and photometry of PHA (52768) 1998 OR2

Image

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About this observation
Observer
Alex Pratt
Time of observation
24/04/2020 - 21:33
Object
PHA (52768) 1998 OR2
Observing location
Z92
Equipment
C11 f/10 with f/3.3 focal reducer
Watec 910 video camera
IOTA-VTI GPS time inserter
OccuRec (recorder)
Tangra (analysis)
Exposure
Video integration settings between 0.16s and 0.64s

I was able to monitor this Potentially Hazardous Asteroid during March and April. Its long-duration apparition and reasonable weather resulted in 90 GPS-timestamped video astrometric measures from 22 nights submitted to the MPC.

NEODyS use MPC data to derive an object's residuals in RA, Dec, magnitude and a chi-squared data quality assessment. The attached diagram shows these residuals from stations using standard CCD astrometry, my video astrometry (Z92) and another video observer (Z43).

NEODyS magnitude residuals are obtained from the tangle of G, R and V magnitudes submitted by observers. In the chi-squared results, values nearer to 0 are assessed as being better quality.

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