3122 Florence
Discovered on March 2, 1981 by S. J. Bus at Siding Spring (Australia). Included in the list of the "Potentially Hazardous Asteroids" of the Minor Planet Center.
Orbital and Physical Characteristics
| Primary | Inner Moon | Outer Moon | |
|---|---|---|---|
| Epoch | 2018 Mar 23 | ||
| Mean Anomaly | 75.23163° | ||
| Argument of Perihelion | 27.85876° | ||
| Longitude of Ascending Node | 336.08676° | ||
| Inclination | 22.14482° | ||
| Eccentricity | 0.4232053 | ||
| Semimajor Axis | 1.7687706 AU | ||
| Orbital Period | 2.35 years | ~7-8 h | ~21-22 h |
MOID |
0.0438416 AU | ||
| Orbit type | Amor | ||
| Absolute Magnitude | 14.1 | ||
| Diameter | 4350 m | ~180-240 m | ~300-360 m |
| Rotation period | 2.3581 h [1] |
Close Approach to the Earth
| Date of encounter | 2017 Sep 1 |
| Distance | 0.0472 AU (18.4 lunar distances) |
Observation Schedule
| Date | Window, UT | Receiver |
Transmitter |
Frequency, MHz |
λ, cm |
Ptx, kW |
R, au |
RTT, sec |
SNR/RTT |
|---|---|---|---|---|---|---|---|---|---|
| 2017 Sep 4 | 07:40 - 10:20 | RT-32 (Bd) | DSS-14 [2] | 8560.0 | 3.5 | 240 | 0.052 | 52 | 6 |
Echo power spectrum
Bistatic DSS-14/RT-32 continuous wave echo power spectra of 3122 Florence obtained at Badary observatory on September 4, 2017 from 9:57 to 10:21 UT. Solid and dashed lines denote echo power in the opposite circular (OC) and same circular (SC) polarizations as that of the transmitted wave.
Remarks
Warner et al., 2009.
We thank L. A. Benner, S. Naidu, M. Brozovic and the technical staff at Goldstone for the help with the radar observations.