メタデータ
| 項目 |
値 |
| Designation |
149P/Mueller 4 |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2010-02-18T16:52:27.373440Z |
| Orbit solution date (soln_date, UTC) |
2023-05-03T22:44:05Z |
| Obs used |
494 |
| NEO |
- |
| M1 |
15.500 |
| K1 |
4.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2013-05-05.0000000 |
| e |
0.38831799 |
| q (au) |
2.646439 |
| a (au) |
4.326494 |
| i (deg) |
29.754798 |
| Ω (om, deg) |
145.255090 |
| ω (w, deg) |
43.567077 |
| M (ma, deg) |
128.282351 |
等級
散乱 + 全体線形
$$
M_a = (16.267 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
16.267 |
| n |
2.000 |
| gf |
0.996 |
| gb |
-0.532 |
| k |
0.800 |
| δ90 |
9.998 |
| 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
ファインディングチャート
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
09:10:35.39 |
+13:59:37.5 |
HIP 45065 |
16.01 |
| 2026-07-29 12:00 |
09:11:23.32 |
+13:58:58.5 |
HIP 45065 |
19.28 |
| 2026-07-30 00:00 |
09:12:11.27 |
+13:58:18.7 |
HIP 45065 |
27.54 |
| 2026-07-30 12:00 |
09:12:59.25 |
+13:57:38.0 |
HIP 45295 |
19.43 |
| 2026-07-31 00:00 |
09:13:47.25 |
+13:56:56.4 |
HIP 45295 |
15.73 |
| 2026-07-31 12:00 |
09:14:35.28 |
+13:56:13.9 |
HIP 45295 |
19.74 |
| 2026-08-01 00:00 |
09:15:23.34 |
+13:55:30.5 |
HIP 45488 |
16.17 |
| 2026-08-01 12:00 |
09:16:11.41 |
+13:54:46.3 |
HIP 45488 |
12.85 |
| 2026-08-02 00:00 |
09:16:59.51 |
+13:54:01.3 |
HIP 45488 |
18.50 |
| 2026-08-02 12:00 |
09:17:47.64 |
+13:53:15.4 |
HIP 45609 |
13.69 |
| 2026-08-03 00:00 |
09:18:35.78 |
+13:52:28.6 |
HIP 45684 |
13.67 |
| 2026-08-03 12:00 |
09:19:23.95 |
+13:51:41.1 |
HIP 45684 |
15.18 |
| 2026-08-04 00:00 |
09:20:12.14 |
+13:50:52.6 |
HIP 45778 |
13.12 |
| 2026-08-04 12:00 |
09:21:00.36 |
+13:50:03.4 |
HIP 45778 |
19.51 |
| 2026-08-05 00:00 |
09:21:48.59 |
+13:49:13.3 |
HIP 46050 |
24.15 |
| 2026-08-05 12:00 |
09:22:36.85 |
+13:48:22.5 |
HIP 46050 |
12.67 |
| 2026-08-06 00:00 |
09:23:25.13 |
+13:47:30.8 |
HIP 46050 |
3.71 |
| 2026-08-06 12:00 |
09:24:13.43 |
+13:46:38.3 |
HIP 46050 |
11.98 |
| 2026-08-07 00:00 |
09:25:01.75 |
+13:45:45.1 |
HIP 46050 |
23.45 |
| 2026-08-07 12:00 |
09:25:50.09 |
+13:44:51.0 |
HIP 46415 |
30.45 |
| 2026-08-08 00:00 |
09:26:38.45 |
+13:43:56.2 |
HIP 46415 |
18.73 |
| 2026-08-08 12:00 |
09:27:26.82 |
+13:43:00.6 |
HIP 46415 |
7.22 |
| 2026-08-09 00:00 |
09:28:15.22 |
+13:42:04.3 |
HIP 46415 |
5.59 |
| 2026-08-09 12:00 |
09:29:03.64 |
+13:41:07.2 |
HIP 46415 |
16.99 |
| 2026-08-10 00:00 |
09:29:52.07 |
+13:40:09.3 |
HIP 46650 |
15.93 |
| 2026-08-10 12:00 |
09:30:40.52 |
+13:39:10.7 |
HIP 46650 |
9.42 |
| 2026-08-11 00:00 |
09:31:28.99 |
+13:38:11.4 |
HIP 46680 |
11.29 |
| 2026-08-11 12:00 |
09:32:17.47 |
+13:37:11.4 |
HIP 46680 |
20.21 |
| 2026-08-12 00:00 |
09:33:05.98 |
+13:36:10.6 |
HIP 46680 |
31.13 |
| 2026-08-12 12:00 |
09:33:54.49 |
+13:35:09.2 |
HIP 47035 |
34.57 |
| 2026-08-13 00:00 |
09:34:43.02 |
+13:34:07.0 |
HIP 47149 |
29.52 |
| 2026-08-13 12:00 |
09:35:31.57 |
+13:33:04.2 |
HIP 47149 |
19.55 |
| 2026-08-14 00:00 |
09:36:20.12 |
+13:32:00.7 |
HIP 47149 |
13.18 |
| 2026-08-14 12:00 |
09:37:08.70 |
+13:30:56.5 |
HIP 47149 |
15.68 |
| 2026-08-15 00:00 |
09:37:57.28 |
+13:29:51.6 |
HIP 47388 |
22.40 |
| 2026-08-15 12:00 |
09:38:45.88 |
+13:28:46.1 |
HIP 47388 |
12.59 |
| 2026-08-16 00:00 |
09:39:34.49 |
+13:27:40.0 |
HIP 47388 |
9.85 |
| 2026-08-16 12:00 |
09:40:23.11 |
+13:26:33.2 |
HIP 47388 |
17.81 |
| 2026-08-17 00:00 |
09:41:11.74 |
+13:25:25.8 |
HIP 47513 |
12.84 |
| 2026-08-17 12:00 |
09:42:00.38 |
+13:24:17.8 |
HIP 47589 |
8.01 |
| 2026-08-18 00:00 |
09:42:49.03 |
+13:23:09.1 |
HIP 47706 |
12.00 |
| 2026-08-18 12:00 |
09:43:37.69 |
+13:21:59.9 |
HIP 47706 |
4.54 |
| 2026-08-19 00:00 |
09:44:26.37 |
+13:20:50.0 |
HIP 47706 |
13.43 |