Table 5
Radar-derived disc-integrated properties for the cw spectra of (85990) 1999 JV6.
UT Date | UT Time | λB | βB | φ | Radar x-sect. | Proj. area | Radar OC | Radar SC | SC/OC |
---|---|---|---|---|---|---|---|---|---|
[hh:mm:ss] | [hh:mm:ss] | [°] | [°] | [°] | [×105 m2] | [×105 m2] | albedo | albedo | ratio |
2015-01-14 | 06:11:55 | 63 | −12 | 27 | 0.310 | 1.91 | 0.162 | 0.064 | 0.394 ± 0.015 |
2015-01-15 | 05:58:29 | 196 | −11 | 254 | 0.161 | 1.24 | 0.130 | 0.043 | 0.327 ± 0.007 |
2015-01-16 | 06:33:03 | 285 | −10 | 165 | 0.340 | 2.01 | 0.169 | 0.035 | 0.208 ± 0.003 |
2015-01-17 | 07:15:03 | 7 | −9 | 83 | 0.131 | 1.12 | 0.117 | 0.036 | 0.311 ± 0.010 |
2015-01-18 | 07:05:53 | 136 | −9 | 314 | 0.230 | 1.64 | 0.140 | 0.044 | 0.313 ± 0.006 |
2015-01-28 | 04:36:37 | 32 | −2 | 58 | 0.191 | 1.44 | 0.133 | 0.043 | 0.322 ± 0.014 |
2016-01-14 | 03:12:35 | 236 | −24 | 214 | 0.288 | 1.89 | 0.152 | 0.059 | 0.387 ± 0.002 |
2016-01-15 | 02:55:30 | 11 | −21 | 79 | 0.166 | 1.32 | 0.125 | 0.052 | 0.415 ± 0.005 |
2016-01-17 | 02:26:48 | 275 | −16 | 175 | 0.351 | 2.05 | 0.171 | 0.070 | 0.409 ± 0.003 |
2016-01-17 | 03:37:00 | 210 | −16 | 240 | 0.201 | 1.51 | 0.133 | 0.053 | 0.396 ± 0.003 |
2016-01-18 | 03:43:18 | 323 | −14 | 127 | 0.223 | 1.57 | 0.142 | 0.063 | 0.442 ± 0.005 |
2016-01-19 | 02:15:07 | 163 | −13 | 287 | 0.152 | 1.27 | 0.120 | 0.048 | 0.400 ± 0.007 |
2017-01-14 | 23:53:17 | 311 | −16 | 139 | 0.271 | 1.76 | 0.154 | 0.051 | 0.332 ± 0.004 |
2017-01-15 | 23:38:26 | 80 | −15 | 10 | 0.343 | 2.03 | 0.169 | 0.052 | 0.307 ± 0.003 |
Mean values: | 0.14 ± 0.02 | 0.05 ± 0.01 | 0.37 ± 0.05 |
Notes. UT Date and UT Time is the universal-time date and time mid-receive. The body-fixed longitude, λB, and latitude, βB, of the radar line-of-sight, and rotationphase, φ, were determined using the spin-state for the best-fit radar shape model (see Table 3). The rotation phase is measured in degrees as an offset of X-axis relative to its position at T0. The radar cross-sections (“radar x-sect.” column) were calculated from the OC power spectra. The “Projected areas” and “Radar OC albedos” were derived using the best-fit 3D shape. The “Radar SC albedos” were calculated from the OC albedos and the SC/OC ratio. The “SC/OC ratio” for each spectrum is also given. In the last row we list the means and standard deviations of OC albedo, SC albedo and SC/OC ratio, the latter two excluding anomalous value measured on 16 January 2015.
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