メタデータ
| 項目 |
値 |
| Designation |
120P/Mueller 1 |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2004-09-29T10:29:13.793280Z |
| Orbit solution date (soln_date, UTC) |
2022-02-14T01:12:50Z |
| Obs used |
147 |
| NEO |
- |
| M1 |
6.600 |
| K1 |
26.250 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2007-09-06.0000000 |
| e |
0.33653878 |
| q (au) |
2.743863 |
| a (au) |
4.135679 |
| i (deg) |
8.791195 |
| Ω (om, deg) |
4.442767 |
| ω (w, deg) |
30.008025 |
| M (ma, deg) |
125.574538 |
等級
散乱 + 全体線形
$$
M_a = (11.540 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
11.540 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.503 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
15:17:21.72 |
-26:59:14.2 |
HIP 74694 |
19.78 |
| 2026-07-29 12:00 |
15:17:23.50 |
-26:58:39.0 |
HIP 74694 |
20.25 |
| 2026-07-30 00:00 |
15:17:25.50 |
-26:58:04.5 |
HIP 74694 |
20.78 |
| 2026-07-30 12:00 |
15:17:27.71 |
-26:57:30.8 |
HIP 74694 |
21.36 |
| 2026-07-31 00:00 |
15:17:30.13 |
-26:56:57.8 |
HIP 74694 |
21.99 |
| 2026-07-31 12:00 |
15:17:32.76 |
-26:56:25.5 |
HIP 74694 |
22.68 |
| 2026-08-01 00:00 |
15:17:35.61 |
-26:55:54.1 |
HIP 74694 |
23.42 |
| 2026-08-01 12:00 |
15:17:38.66 |
-26:55:23.3 |
HIP 74694 |
24.20 |
| 2026-08-02 00:00 |
15:17:41.93 |
-26:54:53.3 |
HIP 74694 |
25.03 |
| 2026-08-02 12:00 |
15:17:45.40 |
-26:54:24.1 |
HIP 74694 |
25.91 |
| 2026-08-03 00:00 |
15:17:49.09 |
-26:53:55.6 |
HIP 75007 |
25.63 |
| 2026-08-03 12:00 |
15:17:52.98 |
-26:53:27.9 |
HIP 75007 |
24.66 |
| 2026-08-04 00:00 |
15:17:57.08 |
-26:53:01.0 |
HIP 75007 |
23.65 |
| 2026-08-04 12:00 |
15:18:01.39 |
-26:52:34.8 |
HIP 75007 |
22.60 |
| 2026-08-05 00:00 |
15:18:05.90 |
-26:52:09.3 |
HIP 75007 |
21.51 |
| 2026-08-05 12:00 |
15:18:10.62 |
-26:51:44.6 |
HIP 75007 |
20.38 |
| 2026-08-06 00:00 |
15:18:15.55 |
-26:51:20.7 |
HIP 75007 |
19.21 |
| 2026-08-06 12:00 |
15:18:20.68 |
-26:50:57.6 |
HIP 75007 |
18.00 |
| 2026-08-07 00:00 |
15:18:26.02 |
-26:50:35.2 |
HIP 75007 |
16.75 |
| 2026-08-07 12:00 |
15:18:31.57 |
-26:50:13.6 |
HIP 75007 |
15.47 |
| 2026-08-08 00:00 |
15:18:37.32 |
-26:49:52.7 |
HIP 75007 |
14.14 |
| 2026-08-08 12:00 |
15:18:43.27 |
-26:49:32.6 |
HIP 75007 |
12.78 |
| 2026-08-09 00:00 |
15:18:49.42 |
-26:49:13.3 |
HIP 75007 |
11.37 |
| 2026-08-09 12:00 |
15:18:55.78 |
-26:48:54.8 |
HIP 75007 |
9.94 |
| 2026-08-10 00:00 |
15:19:02.34 |
-26:48:37.0 |
HIP 75007 |
8.47 |
| 2026-08-10 12:00 |
15:19:09.11 |
-26:48:20.0 |
HIP 75007 |
6.98 |
| 2026-08-11 00:00 |
15:19:16.07 |
-26:48:03.7 |
HIP 75007 |
5.48 |
| 2026-08-11 12:00 |
15:19:23.24 |
-26:47:48.2 |
HIP 75007 |
4.01 |
| 2026-08-12 00:00 |
15:19:30.60 |
-26:47:33.5 |
HIP 75007 |
2.71 |
| 2026-08-12 12:00 |
15:19:38.17 |
-26:47:19.6 |
HIP 75007 |
2.05 |
| 2026-08-13 00:00 |
15:19:45.93 |
-26:47:06.4 |
HIP 75007 |
2.66 |
| 2026-08-13 12:00 |
15:19:53.89 |
-26:46:54.0 |
HIP 75007 |
4.05 |
| 2026-08-14 00:00 |
15:20:02.05 |
-26:46:42.4 |
HIP 75007 |
5.72 |
| 2026-08-14 12:00 |
15:20:10.41 |
-26:46:31.5 |
HIP 75007 |
7.51 |
| 2026-08-15 00:00 |
15:20:18.96 |
-26:46:21.4 |
HIP 75007 |
9.37 |
| 2026-08-15 12:00 |
15:20:27.71 |
-26:46:12.0 |
HIP 75007 |
11.30 |
| 2026-08-16 00:00 |
15:20:36.65 |
-26:46:03.4 |
HIP 75007 |
13.28 |
| 2026-08-16 12:00 |
15:20:45.78 |
-26:45:55.5 |
HIP 75007 |
15.31 |
| 2026-08-17 00:00 |
15:20:55.10 |
-26:45:48.4 |
HIP 75007 |
17.39 |
| 2026-08-17 12:00 |
15:21:04.62 |
-26:45:42.1 |
HIP 75007 |
19.51 |
| 2026-08-18 00:00 |
15:21:14.33 |
-26:45:36.5 |
HIP 75007 |
21.68 |
| 2026-08-18 12:00 |
15:21:24.23 |
-26:45:31.6 |
HIP 75288 |
21.15 |
| 2026-08-19 00:00 |
15:21:34.31 |
-26:45:27.5 |
HIP 75288 |
18.93 |