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Table 1

A chronological list of optical light curves of asteroid (85990) 1999 JV6 used in this study.

ID UT Date Rh Δ α λO βO Total Ampl. Filter Obs. Ref. LC-only LC+radar
[yyyy-mm-dd] [AU] [AU] [°] [°] [°] [h] [mag] facility model model
1 2007-03-02 1.310 0.367 24.2 192.9 13.5 6.3 1.43 r INT
2 2007-03-03 1.312 0.364 23.2 192.3 13.7 6.0 1.44 r INT
3 2007-03-04 1.312 0.361 22.3 191.7 14.0 5.4 1.40 r INT
4 2007-03-06 1.314 0.356 20.4 190.4 14.5 6.4 1.05 r INT
5 2008-02-15 1.280 0.389 34.1 193.1 9.8 2.7 1.02 r INT
6 2008-02-17 1.284 0.382 32.3 192.4 10.3 3.2 0.96 r INT
7 2008-02-18 1.286 0.378 31.4 192.0 10.6 5.1 1.38 r INT
8 2013-02-04 1.189 0.214 16.8 155.0 7.2 2.4 0.97 V NTT
9 2013-02-04 1.189 0.214 16.6 155.0 7.2 2.0 0.81 V NTT
10 2014-01-28 1.142 0.166 16.6 147.7 3.9 4.4 1.00 Clear PDS 1
11 2014-01-28 1.142 0.166 16.3 147.7 3.9 3.3 0.95 Clear PDS 1
12 2014-01-29 1.147 0.169 14.6 146.3 4.3 5.3 0.94 Clear PDS 1
13 2014-01-29 1.147 0.169 14.3 146.3 4.3 2.6 0.97 Clear PDS 1
14 2014-02-01 1.159 0.177 9.3 142.4 5.4 5.7 0.97 Clear PDS 1
15 2014-02-02 1.163 0.180 8.0 141.2 5.8 5.4 0.93 Clear PDS 1
16 2014-02-02 1.163 0.180 7.8 141.2 5.8 3.9 0.87 Clear PDS 1
17 2015-01-16 1.067 0.096 27.8 146.6 −6.8 3.5 0.96 Clear PDS 2
18 2015-01-16 1.067 0.096 27.4 146.6 −6.8 3.0 0.97 Clear PDS 2
19 2015-01-17 1.072 0.099 24.7 144.3 −5.8 3.4 0.98 Clear PDS 2
20 2015-01-17 1.072 0.099 24.3 144.3 −5.8 3.2 0.96 Clear PDS 2
21 2015-01-18 1.076 0.101 21.7 142.2 −4.9 3.9 0.87 Clear PDS 2
22 2015-01-18 1.076 0.101 21.3 142.2 −4.9 2.1 0.75 Clear PDS 2
23 2015-01-23 1.100 0.118 8.3 133.0 −0.8 7.0 0.96 R TMO
24 2015-01-24 1.105 0.122 6.1 131.4 −0.2 7.2 0.91 R TMO
25 2015-01-25 1.110 0.126 4.0 130.0 0.5 7.0 0.84 R TMO
26 2016-02-03 1.131 0.170 29.8 99.8 2.6 5.9 1.17 V INT
27 2016-02-04 1.135 0.176 30.4 99.8 3.0 6.8 1.25 V INT
28 2016-02-06 1.143 0.189 31.7 100.0 3.6 5.4 1.12 V INT

Notes. For each light curve anumerical “ID” is listed, then the Universal Time (UT) “Date” at the beginning of the night is given as well as the heliocentric (Rh) and geocentric (Δ) distances measured in AU, the solar phase angle (α), the observer centred ecliptic longitude (λO), the observer centred ecliptic latitude (βO), “Total” length of the light curve, the apparent peak-to-peak “Amplitude”, and the “Observing facility” used to obtain the light curve. Where applicable a “Reference” to the already published work is given. Each line represents a single light curve (sometimes a few segments were observed on a single night). Circles in the “LC-only model” and “LC+radar model” columns indicate which light curves were selected for the light-curve-only and combined light curve and radar shape modelling, respectively, see Sects. 2.1 and 3. A subset of light curves used for the development of the “LC-only model” was selected for the rotational phase and observing geometry coverage, and S/N. For the “LC+radar model” we used only a few of the light curves closest to the radar observing dates. All of the light-curve data available were used for measuring phase offsets in the final stage of the spin-state analysis discussed in Sect. 4. Observing facility key (with MPC site code): (INT, 950), 2.5 m Isaac Newton Telescope, La Palma, Spain; (NTT, 809), European Southern Observatory 3.5 m New Technology Telescope, Chile; (PDS, U82), Palmer Divide Station, California, USA; (TMO, 673), Table Mountain Observatory, California, USA.

References. (1) Warner (2014); (2) Warner (2015).

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