メタデータ
| 項目 |
値 |
| Designation |
98P/Takamizawa |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2013-08-05T11:26:09.798720Z |
| Orbit solution date (soln_date, UTC) |
2021-06-02T08:41:36Z |
| Obs used |
558 |
| NEO |
- |
| M1 |
14.600 |
| K1 |
8.750 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2011-12-20.0000000 |
| e |
0.56058596 |
| q (au) |
1.672338 |
| a (au) |
3.805837 |
| i (deg) |
10.545980 |
| Ω (om, deg) |
114.752675 |
| ω (w, deg) |
157.947415 |
| M (ma, deg) |
281.084281 |
等級
散乱 + 全体線形
$$
M_a = (14.094 + 5.937\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
14.094 |
| n |
5.937 |
| gf |
1.000 |
| gb |
-0.737 |
| 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) |
| 2026-09-20 00:00 |
09:28:25.52 |
+17:43:12.7 |
HIP 46545 |
16.58 |
| 2026-09-20 12:00 |
09:28:51.33 |
+17:41:40.1 |
HIP 46545 |
10.24 |
| 2026-09-21 00:00 |
09:29:17.09 |
+17:40:07.8 |
HIP 46545 |
3.91 |
| 2026-09-21 12:00 |
09:29:42.79 |
+17:38:35.6 |
HIP 46545 |
2.40 |
| 2026-09-22 00:00 |
09:30:08.44 |
+17:37:03.7 |
HIP 46545 |
8.70 |
| 2026-09-22 12:00 |
09:30:34.03 |
+17:35:32.0 |
HIP 46545 |
14.99 |
| 2026-09-23 00:00 |
09:30:59.57 |
+17:34:00.5 |
HIP 46545 |
21.26 |
| 2026-09-23 12:00 |
09:31:25.05 |
+17:32:29.2 |
HIP 46545 |
27.52 |
| 2026-09-24 00:00 |
09:31:50.47 |
+17:30:58.1 |
HIP 46896 |
32.44 |
| 2026-09-24 12:00 |
09:32:15.83 |
+17:29:27.3 |
HIP 46896 |
27.31 |
| 2026-09-25 00:00 |
09:32:41.13 |
+17:27:56.8 |
HIP 46896 |
22.75 |
| 2026-09-25 12:00 |
09:33:06.37 |
+17:26:26.5 |
HIP 46896 |
19.16 |
| 2026-09-26 00:00 |
09:33:31.55 |
+17:24:56.4 |
HIP 46896 |
17.14 |
| 2026-09-26 12:00 |
09:33:56.67 |
+17:23:26.6 |
HIP 46896 |
17.24 |
| 2026-09-27 00:00 |
09:34:21.73 |
+17:21:57.1 |
HIP 46896 |
19.42 |
| 2026-09-27 12:00 |
09:34:46.73 |
+17:20:27.8 |
HIP 46896 |
23.07 |
| 2026-09-28 00:00 |
09:35:11.66 |
+17:18:58.8 |
HIP 47138 |
17.08 |
| 2026-09-28 12:00 |
09:35:36.53 |
+17:17:30.2 |
HIP 47138 |
10.99 |
| 2026-09-29 00:00 |
09:36:01.33 |
+17:16:01.8 |
HIP 47138 |
4.95 |
| 2026-09-29 12:00 |
09:36:26.07 |
+17:14:33.7 |
HIP 47138 |
1.67 |
| 2026-09-30 00:00 |
09:36:50.74 |
+17:13:05.9 |
HIP 47138 |
7.41 |
| 2026-09-30 12:00 |
09:37:15.34 |
+17:11:38.4 |
HIP 47138 |
13.43 |
| 2026-10-01 00:00 |
09:37:39.88 |
+17:10:11.2 |
HIP 47274 |
12.61 |
| 2026-10-01 12:00 |
09:38:04.34 |
+17:08:44.4 |
HIP 47274 |
12.59 |
| 2026-10-02 00:00 |
09:38:28.74 |
+17:07:17.9 |
HIP 47274 |
15.17 |
| 2026-10-02 12:00 |
09:38:53.07 |
+17:05:51.7 |
HIP 47274 |
19.32 |
| 2026-10-03 00:00 |
09:39:17.32 |
+17:04:25.9 |
HIP 47455 |
17.30 |
| 2026-10-03 12:00 |
09:39:41.51 |
+17:03:00.5 |
HIP 47455 |
11.43 |
| 2026-10-04 00:00 |
09:40:05.62 |
+17:01:35.4 |
HIP 47455 |
5.73 |
| 2026-10-04 12:00 |
09:40:29.66 |
+17:00:10.7 |
HIP 47455 |
2.36 |
| 2026-10-05 00:00 |
09:40:53.62 |
+16:58:46.3 |
HIP 47455 |
6.94 |
| 2026-10-05 12:00 |
09:41:17.50 |
+16:57:22.4 |
HIP 47455 |
12.64 |
| 2026-10-06 00:00 |
09:41:41.31 |
+16:55:58.8 |
HIP 47598 |
12.67 |
| 2026-10-06 12:00 |
09:42:05.04 |
+16:54:35.7 |
HIP 47598 |
10.85 |
| 2026-10-07 00:00 |
09:42:28.70 |
+16:53:12.9 |
HIP 47598 |
11.95 |
| 2026-10-07 12:00 |
09:42:52.27 |
+16:51:50.6 |
HIP 47598 |
15.33 |
| 2026-10-08 00:00 |
09:43:15.76 |
+16:50:28.7 |
HIP 47598 |
19.85 |
| 2026-10-08 12:00 |
09:43:39.17 |
+16:49:07.3 |
HIP 47598 |
24.87 |
| 2026-10-09 00:00 |
09:44:02.50 |
+16:47:46.3 |
HIP 47784 |
24.18 |
| 2026-10-09 12:00 |
09:44:25.74 |
+16:46:25.7 |
HIP 47784 |
21.70 |
| 2026-10-10 00:00 |
09:44:48.90 |
+16:45:05.6 |
HIP 47784 |
20.57 |
| 2026-10-10 12:00 |
09:45:11.97 |
+16:43:46.0 |
HIP 47784 |
20.99 |
| 2026-10-11 00:00 |
09:45:34.96 |
+16:42:26.8 |
HIP 47972 |
18.76 |