2015 TB145
Data
| Provisional Designation | 2015 TB145 |
|---|---|
| Diameter | 600 m - 700 m |
| Absolute Magnitude, H | 20.0 |
| Rotation period | 2.938 h (4.779 h) |
| Polarization Ratio | 0.19 |
| Semi-major axis | 2.1006 au |
| Discovery Date | 2015-10-10 |
| Discovery Means | Pan- STARRS 1 at Haleakala |
Description
Near-Earth asteroid 2015 TB145 was discovered on 2015 October 10 by the University of Hawaii's Pan-STARRS survey. Follow-up radar observations at Arecibo Observatory1,2 were conducted from 2015 October 30 to November 01, which revealed the asteroid to be at least 600 m in diameter. In radar images, the visible echo depth of 2015 TB145 was 424 ± 28 m. Thermal infrared observations indicate a diameter of at most 700 m3. Lightcurve data suggest a preferred rotation period of 2.938 hours, although a rotation period of 4.779 is also possible3.
1Busch, M., et al., 2016. Recent radar observations of potentially hazardous near-Earth asteroids with the Arecibo Observatory and the Deep Space Network. AGU, Abstract #NH12A-06. https://ui.adsabs.harvard.edu/abs/2016AGUFMNH12A..06B/abstract
2Rivera-Valentín, E. G., et al., 2016. Radar observations of near-Earth asteroids from Arecibo Observatory. DPS 48, Abstract #329.10. https://ui.adsabs.harvard.edu/abs/2016DPS....4832910R/abstract
3Müller, T. G. et al. (2017) Astronomy & Astrophysics, doi: 10.1051/0004-6361/201629584
Radar Experiments
Doppler-Only (Continuous Wave) Echo Power Spectra
Animations
Description
Echo power spectrum obtained on 2015 October 30 smoothed to a frequency resolution of 0.17 Hz. Power in the opposite circular (OC) polarization as transmitted is the solid line while the power in the same circular (SC) polarization as transmitted is the dashed line. The polarization ratio on this date was 0.18.
Observation Date: 2015-11-01
Resolution: 0.17 Hz
Polarization Ratio: 0.18
Download Options:
CSV file is the raw data corresponding to the viewed cw spectra. The CSV file consists of three columns. The first column is the doppler frequency (Hz), the second column is the echo power in the same sense (SC) and the third column is the echo power in the opposite sense (OC). Echo power is in units of standard deviation above the noise baseline.
Description
Echo power spectrum obtained on 2015 October 31 smoothed to a frequency resolution of 0.25 Hz. Power in the opposite circular (OC) polarization as transmitted is the solid line while the power in the same circular (SC) polarization as transmitted is the dashed line. The polarization ratio on this date was 0.19.
Observation Date: 2015-10-31
Resolution: 0.25 Hz
Polarization Ratio: 0.19
Download Options:
CSV file is the raw data corresponding to the viewed cw spectra. The CSV file consists of three columns. The first column is the doppler frequency (Hz), the second column is the echo power in the same sense (SC) and the third column is the echo power in the opposite sense (OC). Echo power is in units of standard deviation above the noise baseline.
Description
Echo power spectrum obtained on 2015 October 30 smoothed to a frequency resolution of 0.18 Hz. Power in the opposite circular (OC) polarization as transmitted is the solid line while the power in the same circular (SC) polarization as transmitted is the dashed line. The polarization ratio on this date was 0.19.
Observation Date: 2015-10-30
Resolution: 0.18 Hz
Polarization Ratio: 0.19
Download Options:
CSV file is the raw data corresponding to the viewed cw spectra. The CSV file consists of three columns. The first column is the doppler frequency (Hz), the second column is the echo power in the same sense (SC) and the third column is the echo power in the opposite sense (OC). Echo power is in units of standard deviation above the noise baseline.
Description
Sequence of delay-Doppler radar images obtained on 2015 October 30 from 06:17 to 06:53 AST. The resolution is 7.5 m per pixel vertically along the delay axis and 0.05 Hz per pixel horizontally along the Doppler axis. The radar illuminated 424 ± 28 m of the asteroid.
Observation Date: 2015-10-30
Download Options:
Publications
Müller, T. G. et al. (2017) Astronomy & Astrophysics https://doi.org/10.1051/0004-6361/201629584
Rivera-Valentín, E. G., et al., 2016. Radar observations of near-Earth asteroids from Arecibo Observatory. DPS 48, Abstract #329.10. https://ui.adsabs.harvard.edu/abs/2016DPS....4832910R/abstract
Busch, M., et al., 2016. Recent radar observations of potentially hazardous near-Earth asteroids with the Arecibo Observatory and the Deep Space Network. AGU, Abstract #NH12A-06 https://ui.adsabs.harvard.edu/abs/2016AGUFMNH12A..06B/abstract
