98P/Takamizawa
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) |
| 2026-02-03 00:00 |
07:40:39.09 |
+22:01:20.6 |
HIP 37476 |
14.08 |
| 2026-02-03 12:00 |
07:40:20.00 |
+22:02:28.1 |
HIP 37476 |
17.89 |
| 2026-02-04 00:00 |
07:40:01.01 |
+22:03:35.0 |
HIP 37476 |
21.96 |
| 2026-02-04 12:00 |
07:39:42.13 |
+22:04:41.6 |
HIP 37203 |
21.18 |
| 2026-02-05 00:00 |
07:39:23.34 |
+22:05:47.7 |
HIP 37203 |
17.28 |
| 2026-02-05 12:00 |
07:39:04.66 |
+22:06:53.3 |
HIP 37203 |
13.76 |
| 2026-02-06 00:00 |
07:38:46.10 |
+22:07:58.5 |
HIP 37203 |
10.96 |
| 2026-02-06 12:00 |
07:38:27.64 |
+22:09:03.3 |
HIP 37203 |
9.51 |
| 2026-02-07 00:00 |
07:38:09.30 |
+22:10:07.5 |
HIP 37203 |
9.96 |
| 2026-02-07 12:00 |
07:37:51.08 |
+22:11:11.3 |
HIP 37121 |
9.56 |
| 2026-02-08 00:00 |
07:37:32.99 |
+22:12:14.6 |
HIP 37121 |
8.33 |
| 2026-02-08 12:00 |
07:37:15.01 |
+22:13:17.5 |
HIP 37121 |
9.19 |
| 2026-02-09 00:00 |
07:36:57.16 |
+22:14:19.8 |
HIP 37121 |
11.66 |
| 2026-02-09 12:00 |
07:36:39.45 |
+22:15:21.7 |
HIP 37121 |
14.92 |
| 2026-02-10 00:00 |
07:36:21.86 |
+22:16:23.0 |
HIP 37121 |
18.55 |
| 2026-02-10 12:00 |
07:36:04.41 |
+22:17:23.9 |
HIP 36853 |
19.96 |
| 2026-02-11 00:00 |
07:35:47.10 |
+22:18:24.3 |
HIP 36853 |
15.86 |
| 2026-02-11 12:00 |
07:35:29.93 |
+22:19:24.2 |
HIP 36853 |
11.81 |
| 2026-02-12 00:00 |
07:35:12.90 |
+22:20:23.5 |
HIP 36853 |
7.84 |
| 2026-02-12 12:00 |
07:34:56.02 |
+22:21:22.4 |
HIP 36853 |
4.09 |
| 2026-02-13 00:00 |
07:34:39.28 |
+22:22:20.7 |
HIP 36853 |
2.07 |
| 2026-02-13 12:00 |
07:34:22.70 |
+22:23:18.5 |
HIP 36853 |
4.84 |
| 2026-02-14 00:00 |
07:34:06.27 |
+22:24:15.8 |
HIP 36853 |
8.56 |
| 2026-02-14 12:00 |
07:33:49.99 |
+22:25:12.6 |
HIP 36853 |
12.36 |
| 2026-02-15 00:00 |
07:33:33.88 |
+22:26:08.8 |
HIP 36708 |
10.22 |
| 2026-02-15 12:00 |
07:33:17.92 |
+22:27:04.5 |
HIP 36708 |
7.23 |
| 2026-02-16 00:00 |
07:33:02.13 |
+22:27:59.7 |
HIP 36708 |
5.38 |
| 2026-02-16 12:00 |
07:32:46.50 |
+22:28:54.3 |
HIP 36708 |
5.81 |
| 2026-02-17 00:00 |
07:32:31.04 |
+22:29:48.4 |
HIP 36708 |
8.10 |
| 2026-02-17 12:00 |
07:32:15.75 |
+22:30:42.0 |
HIP 36708 |
11.13 |
| 2026-02-18 00:00 |
07:32:00.63 |
+22:31:35.0 |
HIP 36708 |
14.41 |
| 2026-02-18 12:00 |
07:31:45.69 |
+22:32:27.4 |
HIP 36573 |
16.19 |
| 2026-02-19 00:00 |
07:31:30.92 |
+22:33:19.4 |
HIP 36573 |
16.20 |
| 2026-02-19 12:00 |
07:31:16.33 |
+22:34:10.7 |
HIP 36573 |
16.95 |
| 2026-02-20 00:00 |
07:31:01.92 |
+22:35:01.6 |
HIP 36573 |
18.31 |
| 2026-02-20 12:00 |
07:30:47.69 |
+22:35:51.8 |
HIP 36573 |
20.15 |
| 2026-02-21 00:00 |
07:30:33.65 |
+22:36:41.5 |
HIP 36386 |
20.40 |
| 2026-02-21 12:00 |
07:30:19.79 |
+22:37:30.7 |
HIP 36386 |
17.27 |
| 2026-02-22 00:00 |
07:30:06.12 |
+22:38:19.3 |
HIP 36386 |
14.26 |
| 2026-02-22 12:00 |
07:29:52.64 |
+22:39:07.4 |
HIP 36386 |
11.42 |
| 2026-02-23 00:00 |
07:29:39.35 |
+22:39:54.8 |
HIP 36386 |
8.87 |
| 2026-02-23 12:00 |
07:29:26.25 |
+22:40:41.8 |
HIP 36386 |
6.88 |
| 2026-02-24 00:00 |
07:29:13.35 |
+22:41:28.2 |
HIP 36386 |
5.96 |