Archimedes
A large ancient impact crater on the eastern edges of the Mare Imbrium.
Characteristics
| Selenographic Coordinates | 29.72° N, 3.99° W |
| Diameter | 81.04 km |
| Depth | 2.1 km |
Radar scattering properties
SC/OC |
0.2 [1] |
| Radar albedo | 0.07 [1] |
| OC radar cross section | 2.1×104 km² [1] |
Observation Schedule
| Date | Window, UT | Receiver |
Transmitter |
Frequency, MHz |
λ, cm |
Ptx, kW |
R, au |
RTT, sec |
SNR/RTT |
|---|---|---|---|---|---|---|---|---|---|
| 2020 Oct 26 | 20:30 - 20:40 | RT-13 (Sw) | DSA-3 [2] | 7190.0 | 4.2 | 0.1 | 0.00266 | 2.65 | ~81100 |
| 2020 Oct 29 | 23:30 - 23:40 | 0.00267 | 2.68 | ~79800 |
Echo power spectrum
Continuous wave echo power spectra of Archimedes crater and its surroundings obtained at Svetloe observatory during bistatic radar observations of RT-13/DSA-3 on October 26, 2020 from 20:38 to 20:39 UT and on October 29, 2020 from 23:34 to 23:35 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
Yu. Bondarenko et al., 2020.
We thank the National Commission on Space Activities of Argentina (CONAE) and the technical staff at Malargüe station for the help with the radar observations.