メタデータ
| 項目 |
値 |
| Designation |
P/2018 V5 (Trujillo-Sheppard) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2018-10-03T20:45:02.079360Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:48Z |
| Obs used |
21 |
| NEO |
- |
| M1 |
6.400 |
| K1 |
19.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2018-11-06T12:29:37.939200Z |
| Discovery magnitude (MPC) |
22.21 G |
| Discovery observatory (MPC) |
T09 · Subaru Telescope, Maunakea |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2018-08-01.0000000 |
| e |
0.47462980 |
| q (au) |
4.707643 |
| a (au) |
8.960620 |
| i (deg) |
10.580193 |
| Ω (om, deg) |
171.328440 |
| ω (w, deg) |
260.805603 |
| M (ma, deg) |
357.653302 |
等級
散乱 + 全体線形
$$
M_a = (10.719 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
10.719 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.584 |
| k |
0.800 |
| δ90 |
10.000 |
| パラメータ |
記号 |
範囲 |
説明 |
| 太陽・地球距離が1 AUのときの絶対等級 |
H0 |
-5 to 20 |
彗星の固有の明るさ |
| 測光スロープパラメータ |
n |
2 to 6 |
太陽距離に対する明るさ変化率 |
| 前方散乱非対称係数 |
gf |
0.8 to 1 |
前方散乱の強さ |
| 後方散乱非対称係数 |
gb |
-1 to -0.5 |
後方散乱の強さ |
| 分配係数 |
k |
0.8 to 1 |
前方/後方散乱の寄与比 |
| ダスト/ガス明るさ比 |
δ90 |
1 to 10 |
ダスト散乱とガス放射の相対寄与 |
参考: EPSC-DPS2025-160
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
14:14:07.05 |
-05:13:48.0 |
HIP 69586 |
9.44 |
| 2026-07-29 12:00 |
14:14:09.49 |
-05:14:17.5 |
HIP 69586 |
8.66 |
| 2026-07-30 00:00 |
14:14:12.01 |
-05:14:47.4 |
HIP 69586 |
7.86 |
| 2026-07-30 12:00 |
14:14:14.61 |
-05:15:17.6 |
HIP 69586 |
7.04 |
| 2026-07-31 00:00 |
14:14:17.28 |
-05:15:48.3 |
HIP 69586 |
6.20 |
| 2026-07-31 12:00 |
14:14:20.03 |
-05:16:19.3 |
HIP 69586 |
5.34 |
| 2026-08-01 00:00 |
14:14:22.86 |
-05:16:50.6 |
HIP 69586 |
4.47 |
| 2026-08-01 12:00 |
14:14:25.76 |
-05:17:22.3 |
HIP 69586 |
3.57 |
| 2026-08-02 00:00 |
14:14:28.74 |
-05:17:54.4 |
HIP 69586 |
2.66 |
| 2026-08-02 12:00 |
14:14:31.79 |
-05:18:26.8 |
HIP 69586 |
1.73 |
| 2026-08-03 00:00 |
14:14:34.92 |
-05:18:59.6 |
HIP 69586 |
0.80 |
| 2026-08-03 12:00 |
14:14:38.13 |
-05:19:32.7 |
HIP 69586 |
0.30 |
| 2026-08-04 00:00 |
14:14:41.41 |
-05:20:06.2 |
HIP 69586 |
1.22 |
| 2026-08-04 12:00 |
14:14:44.76 |
-05:20:40.0 |
HIP 69586 |
2.21 |
| 2026-08-05 00:00 |
14:14:48.19 |
-05:21:14.2 |
HIP 69586 |
3.24 |
| 2026-08-05 12:00 |
14:14:51.69 |
-05:21:48.7 |
HIP 69586 |
4.28 |
| 2026-08-06 00:00 |
14:14:55.27 |
-05:22:23.6 |
HIP 69586 |
5.34 |
| 2026-08-06 12:00 |
14:14:58.92 |
-05:22:58.7 |
HIP 69586 |
6.43 |
| 2026-08-07 00:00 |
14:15:02.65 |
-05:23:34.3 |
HIP 69586 |
7.53 |
| 2026-08-07 12:00 |
14:15:06.45 |
-05:24:10.1 |
HIP 69586 |
8.64 |
| 2026-08-08 00:00 |
14:15:10.33 |
-05:24:46.3 |
HIP 69586 |
9.78 |
| 2026-08-08 12:00 |
14:15:14.28 |
-05:25:22.8 |
HIP 69586 |
10.94 |
| 2026-08-09 00:00 |
14:15:18.30 |
-05:25:59.6 |
HIP 69586 |
12.11 |
| 2026-08-09 12:00 |
14:15:22.39 |
-05:26:36.8 |
HIP 69586 |
13.30 |
| 2026-08-10 00:00 |
14:15:26.56 |
-05:27:14.3 |
HIP 69586 |
14.51 |
| 2026-08-10 12:00 |
14:15:30.80 |
-05:27:52.1 |
HIP 69586 |
15.74 |
| 2026-08-11 00:00 |
14:15:35.11 |
-05:28:30.2 |
HIP 69586 |
16.99 |
| 2026-08-11 12:00 |
14:15:39.50 |
-05:29:08.6 |
HIP 69586 |
18.26 |
| 2026-08-12 00:00 |
14:15:43.96 |
-05:29:47.4 |
HIP 69775 |
18.54 |
| 2026-08-12 12:00 |
14:15:48.48 |
-05:30:26.4 |
HIP 69775 |
17.24 |
| 2026-08-13 00:00 |
14:15:53.09 |
-05:31:05.7 |
HIP 69775 |
15.92 |
| 2026-08-13 12:00 |
14:15:57.76 |
-05:31:45.4 |
HIP 69775 |
14.59 |
| 2026-08-14 00:00 |
14:16:02.50 |
-05:32:25.3 |
HIP 69775 |
13.23 |
| 2026-08-14 12:00 |
14:16:07.31 |
-05:33:05.5 |
HIP 69775 |
11.86 |
| 2026-08-15 00:00 |
14:16:12.20 |
-05:33:46.1 |
HIP 69775 |
10.47 |
| 2026-08-15 12:00 |
14:16:17.15 |
-05:34:26.9 |
HIP 69775 |
9.06 |
| 2026-08-16 00:00 |
14:16:22.17 |
-05:35:08.0 |
HIP 69775 |
7.64 |
| 2026-08-16 12:00 |
14:16:27.27 |
-05:35:49.3 |
HIP 69775 |
6.20 |
| 2026-08-17 00:00 |
14:16:32.43 |
-05:36:31.0 |
HIP 69775 |
4.74 |
| 2026-08-17 12:00 |
14:16:37.66 |
-05:37:12.9 |
HIP 69775 |
3.26 |
| 2026-08-18 00:00 |
14:16:42.96 |
-05:37:55.1 |
HIP 69775 |
1.77 |
| 2026-08-18 12:00 |
14:16:48.32 |
-05:38:37.6 |
HIP 69775 |
0.28 |
| 2026-08-19 00:00 |
14:16:53.76 |
-05:39:20.3 |
HIP 69775 |
1.28 |