Table 1
Observational summaries of (85989) 1999 JD6
| Date | UT | Filter(a) | Exp.(b) (N(c)) | Vmag(d) | r(e) | Δ(f) | α(g) | ϕ(h) |
|---|---|---|---|---|---|---|---|---|
| [s] | [V] | [au] | [au] | [°] | [°] | |||
| 2015-06-14 | 16:05:29–16:39:13 | RC | 360(1) | 17.8 | 1.301 | 0.486 | 44.84 | 238.8 |
| 2015-07-16 | 12:00:36–16:08:01 | RC | 60(1),30(27) | 14.5 | 1.080 | 0.112 | 53.87–54.21 | 208.4–208.0 |
| 2015-07-19 | 13:06:44–17:36:19 | RC | 90(1),40(2), | 14.0 | 1.052 | 0.081 | 62.77–63.54 | 201.8–201.3 |
| 30(20),20(3) | ||||||||
| 2015-07-20 | 11:24:24–17:29:24 | RC | 60(18),30(28) | 13.9 | 1.043 | 0.072 | 67.15–68.49 | 199.5–198.8 |
| 2015-07-22 | 17:16:23–17:20:46 | RC | 120(1),60(2) | 13.8 | 1.023 | 0.056 | 83.32 | 191.3 |
| 2015-07-23 | 13:02:20–13:33:24 | RC | 60(3),30(6) | 14.0 | 1.014 | 0.052 | 91.80–91.96 | 184.1–183.8 |
| 2015-07-24 | 15:34:12–16:03:38 | RC | 60(5) | 14.4 | 1.003 | 0.049 | 105.09–105.26 | 117.0–114.9 |
| 2019-05-30 | 15:57:55–16:23:39 | RC | 360(1) | 17.8 | 1.426 | 0.532 | 30.88 | 213.7 |
| 2019-06-02 | 14:18:06–15:34:31 | RC | 900(1) | 17.8 | 1.423 | 0.524 | 29.57 | 207.0 |
| 2015-07-16 | 12:13:16–16:15:52 | V | 30(27) | 14.5 | 1.079 | 0.111 | 53.89–54.22 | 208.3–208.0 |
| 2015-07-19 | 13:29:22–17:59:47 | V | 30(15) | 14.0 | 1.051 | 0.081 | 62.83–62.61 | 201.8–201.3 |
| 2015-07-20 | 11:35:19–15:42:55 | V | 30(27) | 13.9 | 1.043 | 0.073 | 67.18–67.09 | 199.5–199.0 |
| 2015-07-23 | 14:01:21–14:39:36 | V | 120(1),60(6) | 14.0 | 1.014 | 0.052 | 92.24–92.45 | 183.4–183.1 |
Notes. (a) Employed filters (V : center 545, width 87 nm RC : center 641, width 149 nm). (b) Typical exposure time per frame. (c)Number of sets counted as one in the four directions of the half-wave plate. (d) Apparent visual magnitude. (e)Heliocentric distance. (f)Geocentric distance. (g)Solar phase angle. (h)Position angle of the scattering plane (in degrees E of N).
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