332P/Ikeya-Murakami
メタデータ
| 項目 |
値 |
| Designation |
332P/Ikeya-Murakami |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2010-10-13T08:06:24.744960Z |
| Orbit solution date (soln_date, UTC) |
2017-01-17T16:14:01Z |
| Obs used |
385 |
| NEO |
- |
| M1 |
5.200 |
| K1 |
22.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2010-11-20.0000000 |
| e |
0.48859089 |
| q (au) |
1.578843 |
| a (au) |
3.087241 |
| i (deg) |
9.377956 |
| Ω (om, deg) |
3.818489 |
| ω (w, deg) |
152.429576 |
| M (ma, deg) |
6.843119 |
等級
散乱 + 全体線形
$$
M_a = (19.314 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
19.314 |
| n |
6.000 |
| gf |
0.835 |
| gb |
-0.999 |
| k |
0.921 |
| δ90 |
4.888 |
| 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 |
01:03:54.51 |
+11:50:33.1 |
HIP 4884 |
27.67 |
| 2026-02-03 12:00 |
01:04:21.15 |
+11:53:16.5 |
HIP 4884 |
34.02 |
| 2026-02-04 00:00 |
01:04:47.97 |
+11:56:00.9 |
HIP 5117 |
34.03 |
| 2026-02-04 12:00 |
01:05:14.99 |
+11:58:46.5 |
HIP 5258 |
29.45 |
| 2026-02-05 00:00 |
01:05:42.20 |
+12:01:33.2 |
HIP 5258 |
22.41 |
| 2026-02-05 12:00 |
01:06:09.59 |
+12:04:21.0 |
HIP 5258 |
15.48 |
| 2026-02-06 00:00 |
01:06:37.17 |
+12:07:09.9 |
HIP 5258 |
9.04 |
| 2026-02-06 12:00 |
01:07:04.94 |
+12:09:59.8 |
HIP 5258 |
5.53 |
| 2026-02-07 00:00 |
01:07:32.90 |
+12:12:50.8 |
HIP 5258 |
9.40 |
| 2026-02-07 12:00 |
01:08:01.04 |
+12:15:42.9 |
HIP 5258 |
16.04 |
| 2026-02-08 00:00 |
01:08:29.37 |
+12:18:36.0 |
HIP 5417 |
20.19 |
| 2026-02-08 12:00 |
01:08:57.88 |
+12:21:30.2 |
HIP 5417 |
20.19 |
| 2026-02-09 00:00 |
01:09:26.58 |
+12:24:25.4 |
HIP 5407 |
17.56 |
| 2026-02-09 12:00 |
01:09:55.45 |
+12:27:21.7 |
HIP 5407 |
17.86 |
| 2026-02-10 00:00 |
01:10:24.51 |
+12:30:19.0 |
HIP 5407 |
21.15 |
| 2026-02-10 12:00 |
01:10:53.75 |
+12:33:17.2 |
HIP 5407 |
26.37 |
| 2026-02-11 00:00 |
01:11:23.16 |
+12:36:16.5 |
HIP 5631 |
23.70 |
| 2026-02-11 12:00 |
01:11:52.76 |
+12:39:16.8 |
HIP 5631 |
23.28 |
| 2026-02-12 00:00 |
01:12:22.53 |
+12:42:18.1 |
HIP 5638 |
20.08 |
| 2026-02-12 12:00 |
01:12:52.49 |
+12:45:20.3 |
HIP 5638 |
18.11 |
| 2026-02-13 00:00 |
01:13:22.61 |
+12:48:23.6 |
HIP 5638 |
19.45 |
| 2026-02-13 12:00 |
01:13:52.92 |
+12:51:27.7 |
HIP 5854 |
21.45 |
| 2026-02-14 00:00 |
01:14:23.40 |
+12:54:32.9 |
HIP 5854 |
13.74 |
| 2026-02-14 12:00 |
01:14:54.05 |
+12:57:39.0 |
HIP 5854 |
6.80 |
| 2026-02-15 00:00 |
01:15:24.88 |
+13:00:46.0 |
HIP 5854 |
5.90 |
| 2026-02-15 12:00 |
01:15:55.87 |
+13:03:53.9 |
HIP 5854 |
12.51 |
| 2026-02-16 00:00 |
01:16:27.04 |
+13:07:02.8 |
HIP 5854 |
20.34 |
| 2026-02-16 12:00 |
01:16:58.38 |
+13:10:12.6 |
HIP 6050 |
25.62 |
| 2026-02-17 00:00 |
01:17:29.89 |
+13:13:23.3 |
HIP 6050 |
20.30 |
| 2026-02-17 12:00 |
01:18:01.57 |
+13:16:34.8 |
HIP 6050 |
17.48 |
| 2026-02-18 00:00 |
01:18:33.42 |
+13:19:47.3 |
HIP 6050 |
18.41 |
| 2026-02-18 12:00 |
01:19:05.43 |
+13:23:00.6 |
HIP 6050 |
22.67 |
| 2026-02-19 00:00 |
01:19:37.61 |
+13:26:14.8 |
HIP 6050 |
28.85 |
| 2026-02-19 12:00 |
01:20:09.96 |
+13:29:29.9 |
HIP 6324 |
27.17 |
| 2026-02-20 00:00 |
01:20:42.47 |
+13:32:45.7 |
HIP 6324 |
20.70 |
| 2026-02-20 12:00 |
01:21:15.14 |
+13:36:02.5 |
HIP 6324 |
16.26 |
| 2026-02-21 00:00 |
01:21:47.97 |
+13:39:20.0 |
HIP 6324 |
15.74 |
| 2026-02-21 12:00 |
01:22:20.97 |
+13:42:38.3 |
HIP 6324 |
19.52 |
| 2026-02-22 00:00 |
01:22:54.13 |
+13:45:57.5 |
HIP 6324 |
25.81 |
| 2026-02-22 12:00 |
01:23:27.45 |
+13:49:17.5 |
HIP 6489 |
26.96 |
| 2026-02-23 00:00 |
01:24:00.93 |
+13:52:38.2 |
HIP 6489 |
25.34 |
| 2026-02-23 12:00 |
01:24:34.56 |
+13:55:59.7 |
HIP 6705 |
25.07 |
| 2026-02-24 00:00 |
01:25:08.35 |
+13:59:22.0 |
HIP 6705 |
18.96 |