Radar Observations of Asteroid 10115 (1992 SK)

Details Radar Observations of Asteroid 10115 (1992 SK) Radar Observations of Asteroid 10115 (1992 SK)

Jan 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000stin...0075639b&link_type=abstract

Technical Report, Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States

Other

Asteroids, Radar Tracking, Continuous Radiation, Imaging Techniques, Standard Deviation, Time Lag, Astrometry, Asymmetry, Bandwidth, Center Of Mass, Echoes, Elevation, Errors, Frequencies, Rotation, Signal To Noise Ratios

Scientific paper

The approach of 1992 SK to within 0.056 AU of Earth on 1999 March 26 provided an excellent opportunity for radar observations. We observed it daily between March 22-26 at Goldstone at a transmitter frequency of 8560 MHz (3.50 cm). Weighted, optimally smoothed sums of cw (Doppler-only) echoes achieve a signal-to-noise ratio of about 300. Our highest resolution cw setup places up to approx. 30 0.5-Hz Doppler cells on the target at echo powers exceeding two standard deviations of the noise. Our highest resolution imaging setup places about 20 0.25-us (37.5 m) x 2.0 Hz pixels on 1992 SK at echo powers above the same threshold. We completed nearly 300 runs with each setup and obtained thorough rotational phase coverage (period = 7.320 h, P. Pravec, pers. comm.). The dispersion of the echoes in time delay indicates a lower bound on 1992 SK's maximum pole-on breadth of approx. 0.4 km that is consistent with the echo bandwidth and rotation period. Variations in the cw spectral bandwidths and shapes and in the delay-Doppler images as a function of rotation phase are evident on each day, are consistent in bandwidth with each other and with the rotation period, and indicate that the asteroid is asymmetric and modesty elongated.

Affiliated with

Also associated with

No associations

Rating

Radar Observations of Asteroid 10115 (1992 SK) does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Radar Observations of Asteroid 10115 (1992 SK), we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Radar Observations of Asteroid 10115 (1992 SK) will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-811784