メタデータ
| 項目 |
値 |
| Designation |
106P/Schuster |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2014-07-20T10:55:26.912640Z |
| Orbit solution date (soln_date, UTC) |
2024-08-26T13:15:29Z |
| Obs used |
745 |
| NEO |
- |
| M1 |
11.100 |
| K1 |
22.750 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2016-04-15.0000000 |
| e |
0.58951152 |
| q (au) |
1.540819 |
| a (au) |
3.753622 |
| i (deg) |
20.196367 |
| Ω (om, deg) |
50.325484 |
| ω (w, deg) |
355.982706 |
| M (ma, deg) |
85.998429 |
等級
散乱 + 全体線形
$$
M_a = (12.272 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
12.272 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| k |
1.000 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 2021-05-06 |
2021-11-02 |
+20.2433 |
-4.423 |
| 2021-11-02 |
2022-03-25 |
+3.8248 |
-0.887 |
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) |
| 2026-07-29 00:00 |
15:16:06.75 |
-23:43:02.3 |
HIP 74870 |
30.36 |
| 2026-07-29 12:00 |
15:16:05.63 |
-23:43:01.5 |
HIP 74870 |
30.58 |
| 2026-07-30 00:00 |
15:16:04.71 |
-23:43:01.3 |
HIP 74870 |
30.76 |
| 2026-07-30 12:00 |
15:16:03.99 |
-23:43:01.8 |
HIP 74870 |
30.91 |
| 2026-07-31 00:00 |
15:16:03.46 |
-23:43:02.9 |
HIP 74870 |
31.02 |
| 2026-07-31 12:00 |
15:16:03.13 |
-23:43:04.7 |
HIP 74870 |
31.10 |
| 2026-08-01 00:00 |
15:16:03.00 |
-23:43:07.1 |
HIP 74870 |
31.15 |
| 2026-08-01 12:00 |
15:16:03.07 |
-23:43:10.2 |
HIP 74870 |
31.16 |
| 2026-08-02 00:00 |
15:16:03.33 |
-23:43:13.9 |
HIP 74870 |
31.14 |
| 2026-08-02 12:00 |
15:16:03.78 |
-23:43:18.3 |
HIP 74870 |
31.08 |
| 2026-08-03 00:00 |
15:16:04.43 |
-23:43:23.3 |
HIP 74870 |
30.99 |
| 2026-08-03 12:00 |
15:16:05.28 |
-23:43:29.0 |
HIP 74870 |
30.87 |
| 2026-08-04 00:00 |
15:16:06.32 |
-23:43:35.4 |
HIP 74870 |
30.72 |
| 2026-08-04 12:00 |
15:16:07.55 |
-23:43:42.4 |
HIP 74870 |
30.53 |
| 2026-08-05 00:00 |
15:16:08.98 |
-23:43:50.1 |
HIP 74870 |
30.31 |
| 2026-08-05 12:00 |
15:16:10.60 |
-23:43:58.5 |
HIP 74870 |
30.07 |
| 2026-08-06 00:00 |
15:16:12.42 |
-23:44:07.5 |
HIP 74870 |
29.79 |
| 2026-08-06 12:00 |
15:16:14.43 |
-23:44:17.2 |
HIP 74870 |
29.49 |
| 2026-08-07 00:00 |
15:16:16.63 |
-23:44:27.5 |
HIP 74870 |
29.16 |
| 2026-08-07 12:00 |
15:16:19.02 |
-23:44:38.5 |
HIP 74870 |
28.81 |
| 2026-08-08 00:00 |
15:16:21.61 |
-23:44:50.2 |
HIP 74870 |
28.44 |
| 2026-08-08 12:00 |
15:16:24.38 |
-23:45:02.5 |
HIP 74870 |
28.04 |
| 2026-08-09 00:00 |
15:16:27.35 |
-23:45:15.5 |
HIP 74870 |
27.63 |
| 2026-08-09 12:00 |
15:16:30.51 |
-23:45:29.2 |
HIP 74870 |
27.21 |
| 2026-08-10 00:00 |
15:16:33.86 |
-23:45:43.5 |
HIP 74870 |
26.77 |
| 2026-08-10 12:00 |
15:16:37.40 |
-23:45:58.5 |
HIP 74870 |
26.33 |
| 2026-08-11 00:00 |
15:16:41.13 |
-23:46:14.2 |
HIP 74870 |
25.88 |
| 2026-08-11 12:00 |
15:16:45.05 |
-23:46:30.6 |
HIP 74870 |
25.44 |
| 2026-08-12 00:00 |
15:16:49.15 |
-23:46:47.6 |
HIP 74870 |
25.00 |
| 2026-08-12 12:00 |
15:16:53.45 |
-23:47:05.2 |
HIP 74870 |
24.57 |
| 2026-08-13 00:00 |
15:16:57.93 |
-23:47:23.6 |
HIP 74870 |
24.16 |
| 2026-08-13 12:00 |
15:17:02.60 |
-23:47:42.6 |
HIP 74870 |
23.78 |
| 2026-08-14 00:00 |
15:17:07.45 |
-23:48:02.2 |
HIP 74870 |
23.43 |
| 2026-08-14 12:00 |
15:17:12.50 |
-23:48:22.6 |
HIP 74870 |
23.12 |
| 2026-08-15 00:00 |
15:17:17.72 |
-23:48:43.6 |
HIP 74870 |
22.86 |
| 2026-08-15 12:00 |
15:17:23.13 |
-23:49:05.2 |
HIP 74870 |
22.66 |
| 2026-08-16 00:00 |
15:17:28.72 |
-23:49:27.5 |
HIP 74870 |
22.53 |
| 2026-08-16 12:00 |
15:17:34.50 |
-23:49:50.5 |
HIP 74870 |
22.47 |
| 2026-08-17 00:00 |
15:17:40.46 |
-23:50:14.1 |
HIP 74870 |
22.50 |
| 2026-08-17 12:00 |
15:17:46.60 |
-23:50:38.3 |
HIP 74870 |
22.63 |
| 2026-08-18 00:00 |
15:17:52.92 |
-23:51:03.2 |
HIP 74870 |
22.85 |
| 2026-08-18 12:00 |
15:17:59.42 |
-23:51:28.8 |
HIP 74870 |
23.18 |
| 2026-08-19 00:00 |
15:18:06.09 |
-23:51:55.0 |
HIP 74870 |
23.62 |