メタデータ
| 項目 |
値 |
| Designation |
C/2014 F3 (Sheppard-Trujillo) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2021-05-18T09:14:56.149440Z |
| Orbit solution date (soln_date, UTC) |
2025-01-10T09:12:14Z |
| Obs used |
100 |
| NEO |
- |
| M1 |
14.400 |
| K1 |
4.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2020-09-10.0000000 |
| e |
0.64217219 |
| q (au) |
5.704144 |
| a (au) |
15.941031 |
| i (deg) |
6.568810 |
| Ω (om, deg) |
326.803827 |
| ω (w, deg) |
2.927768 |
| M (ma, deg) |
356.122619 |
等級
散乱 + 全体線形
$$
M_a = (13.814 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
13.814 |
| n |
2.000 |
| gf |
0.887 |
| gb |
-0.936 |
| k |
1.000 |
| δ90 |
3.631 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 2014-03-26 |
2020-09-16 |
-6.4566 |
+5.035 |
| 2021-07-09 |
2024-11-25 |
-15.6318 |
+11.981 |
log10 r = log10(太陽距離/AU)、Δ = 地球距離(AU)
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
04:46:25.31 |
+28:04:05.8 |
HIP 22207 |
10.20 |
| 2026-06-01 12:00 |
04:46:39.88 |
+28:04:28.0 |
HIP 22207 |
10.53 |
| 2026-06-02 00:00 |
04:46:54.45 |
+28:04:50.3 |
HIP 22207 |
11.79 |
| 2026-06-02 12:00 |
04:47:09.03 |
+28:05:12.6 |
HIP 22207 |
13.71 |
| 2026-06-03 00:00 |
04:47:23.60 |
+28:05:34.9 |
HIP 22207 |
16.06 |
| 2026-06-03 12:00 |
04:47:38.17 |
+28:05:57.2 |
HIP 22207 |
18.67 |
| 2026-06-04 00:00 |
04:47:52.74 |
+28:06:19.6 |
HIP 22207 |
21.46 |
| 2026-06-04 12:00 |
04:48:07.30 |
+28:06:41.9 |
HIP 22400 |
20.81 |
| 2026-06-05 00:00 |
04:48:21.87 |
+28:07:04.3 |
HIP 22400 |
18.34 |
| 2026-06-05 12:00 |
04:48:36.43 |
+28:07:26.8 |
HIP 22400 |
16.13 |
| 2026-06-06 00:00 |
04:48:50.99 |
+28:07:49.2 |
HIP 22400 |
14.31 |
| 2026-06-06 12:00 |
04:49:05.54 |
+28:08:11.7 |
HIP 22400 |
13.05 |
| 2026-06-07 00:00 |
04:49:20.09 |
+28:08:34.2 |
HIP 22400 |
12.52 |
| 2026-06-07 12:00 |
04:49:34.63 |
+28:08:56.7 |
HIP 22400 |
12.80 |
| 2026-06-08 00:00 |
04:49:49.17 |
+28:09:19.2 |
HIP 22400 |
13.85 |
| 2026-06-08 12:00 |
04:50:03.70 |
+28:09:41.8 |
HIP 22527 |
14.03 |
| 2026-06-09 00:00 |
04:50:18.22 |
+28:10:04.3 |
HIP 22527 |
11.50 |
| 2026-06-09 12:00 |
04:50:32.74 |
+28:10:26.9 |
HIP 22527 |
9.41 |
| 2026-06-10 00:00 |
04:50:47.25 |
+28:10:49.5 |
HIP 22527 |
8.09 |
| 2026-06-10 12:00 |
04:51:01.75 |
+28:11:12.1 |
HIP 22527 |
7.94 |
| 2026-06-11 00:00 |
04:51:16.24 |
+28:11:34.7 |
HIP 22527 |
9.02 |
| 2026-06-11 12:00 |
04:51:30.72 |
+28:11:57.3 |
HIP 22527 |
10.96 |
| 2026-06-12 00:00 |
04:51:45.19 |
+28:12:20.0 |
HIP 22527 |
13.40 |
| 2026-06-12 12:00 |
04:51:59.65 |
+28:12:42.6 |
HIP 22711 |
14.87 |
| 2026-06-13 00:00 |
04:52:14.10 |
+28:13:05.3 |
HIP 22711 |
12.26 |
| 2026-06-13 12:00 |
04:52:28.54 |
+28:13:28.0 |
HIP 22711 |
10.01 |
| 2026-06-14 00:00 |
04:52:42.96 |
+28:13:50.7 |
HIP 22711 |
8.40 |
| 2026-06-14 12:00 |
04:52:57.37 |
+28:14:13.3 |
HIP 22711 |
7.84 |
| 2026-06-15 00:00 |
04:53:11.77 |
+28:14:36.0 |
HIP 22711 |
8.53 |
| 2026-06-15 12:00 |
04:53:26.15 |
+28:14:58.7 |
HIP 22711 |
10.22 |
| 2026-06-16 00:00 |
04:53:40.52 |
+28:15:21.5 |
HIP 22711 |
12.51 |
| 2026-06-16 12:00 |
04:53:54.87 |
+28:15:44.2 |
HIP 22711 |
15.13 |
| 2026-06-17 00:00 |
04:54:09.21 |
+28:16:06.9 |
HIP 22711 |
17.93 |
| 2026-06-17 12:00 |
04:54:23.53 |
+28:16:29.6 |
HIP 22711 |
20.83 |
| 2026-06-18 00:00 |
04:54:37.83 |
+28:16:52.3 |
HIP 22711 |
23.80 |
| 2026-06-18 12:00 |
04:54:52.11 |
+28:17:15.0 |
HIP 22711 |
26.81 |
| 2026-06-19 00:00 |
04:55:06.37 |
+28:17:37.8 |
HIP 23022 |
25.80 |
| 2026-06-19 12:00 |
04:55:20.62 |
+28:18:00.5 |
HIP 23022 |
22.71 |
| 2026-06-20 00:00 |
04:55:34.84 |
+28:18:23.2 |
HIP 23022 |
19.65 |
| 2026-06-20 12:00 |
04:55:49.05 |
+28:18:45.9 |
HIP 23022 |
16.62 |
| 2026-06-21 00:00 |
04:56:03.23 |
+28:19:08.6 |
HIP 23022 |
13.66 |
| 2026-06-21 12:00 |
04:56:17.39 |
+28:19:31.3 |
HIP 23022 |
10.81 |
| 2026-06-22 00:00 |
04:56:31.53 |
+28:19:54.0 |
HIP 23022 |
8.18 |