メタデータ
| 項目 |
値 |
| Designation |
331P/Gibbs |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2015-06-16T04:23:51.780480Z |
| Orbit solution date (soln_date, UTC) |
2025-12-18T15:12:38Z |
| Obs used |
200 |
| NEO |
- |
| M1 |
16.800 |
| 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) |
2014-11-18.0000000 |
| e |
0.04135913 |
| q (au) |
2.880287 |
| a (au) |
3.004552 |
| i (deg) |
9.738157 |
| Ω (om, deg) |
216.839271 |
| ω (w, deg) |
178.117553 |
| M (ma, deg) |
320.222954 |
等級
散乱 + 全体線形
$$
M_a = (11.205 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
11.205 |
| n |
6.000 |
| gf |
0.998 |
| gb |
-0.702 |
| 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
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 |
06:25:32.25 |
+17:32:15.7 |
HIP 30687 |
20.41 |
| 2026-07-29 12:00 |
06:26:19.54 |
+17:30:55.4 |
HIP 30687 |
9.30 |
| 2026-07-30 00:00 |
06:27:06.76 |
+17:29:34.0 |
HIP 30687 |
3.73 |
| 2026-07-30 12:00 |
06:27:53.92 |
+17:28:11.5 |
HIP 30687 |
14.08 |
| 2026-07-31 00:00 |
06:28:41.02 |
+17:26:48.0 |
HIP 30900 |
7.43 |
| 2026-07-31 12:00 |
06:29:28.06 |
+17:25:23.3 |
HIP 30900 |
6.24 |
| 2026-08-01 00:00 |
06:30:15.03 |
+17:23:57.7 |
HIP 30954 |
14.76 |
| 2026-08-01 12:00 |
06:31:01.93 |
+17:22:30.9 |
HIP 30954 |
22.76 |
| 2026-08-02 00:00 |
06:31:48.77 |
+17:21:03.1 |
HIP 31156 |
26.64 |
| 2026-08-02 12:00 |
06:32:35.55 |
+17:19:34.2 |
HIP 31236 |
23.75 |
| 2026-08-03 00:00 |
06:33:22.25 |
+17:18:04.2 |
HIP 31236 |
21.52 |
| 2026-08-03 12:00 |
06:34:08.89 |
+17:16:33.2 |
HIP 31236 |
24.78 |
| 2026-08-04 00:00 |
06:34:55.47 |
+17:15:01.1 |
HIP 31503 |
13.72 |
| 2026-08-04 12:00 |
06:35:41.97 |
+17:13:28.0 |
HIP 31503 |
2.71 |
| 2026-08-05 00:00 |
06:36:28.40 |
+17:11:53.8 |
HIP 31503 |
8.81 |
| 2026-08-05 12:00 |
06:37:14.76 |
+17:10:18.6 |
HIP 31503 |
19.96 |
| 2026-08-06 00:00 |
06:38:01.06 |
+17:08:42.3 |
HIP 31635 |
27.80 |
| 2026-08-06 12:00 |
06:38:47.28 |
+17:07:05.0 |
HIP 31909 |
30.70 |
| 2026-08-07 00:00 |
06:39:33.42 |
+17:05:26.7 |
HIP 31909 |
23.74 |
| 2026-08-07 12:00 |
06:40:19.49 |
+17:03:47.3 |
HIP 31909 |
20.82 |
| 2026-08-08 00:00 |
06:41:05.49 |
+17:02:06.8 |
HIP 31909 |
23.46 |
| 2026-08-08 12:00 |
06:41:51.42 |
+17:00:25.4 |
HIP 32224 |
28.68 |
| 2026-08-09 00:00 |
06:42:37.26 |
+16:58:42.9 |
HIP 32224 |
18.55 |
| 2026-08-09 12:00 |
06:43:23.03 |
+16:56:59.4 |
HIP 32224 |
10.58 |
| 2026-08-10 00:00 |
06:44:08.72 |
+16:55:14.9 |
HIP 32224 |
11.18 |
| 2026-08-10 12:00 |
06:44:54.34 |
+16:53:29.3 |
HIP 32224 |
19.55 |
| 2026-08-11 00:00 |
06:45:39.87 |
+16:51:42.8 |
HIP 32488 |
17.47 |
| 2026-08-11 12:00 |
06:46:25.32 |
+16:49:55.2 |
HIP 32488 |
6.77 |
| 2026-08-12 00:00 |
06:47:10.69 |
+16:48:06.6 |
HIP 32488 |
5.41 |
| 2026-08-12 12:00 |
06:47:55.97 |
+16:46:17.1 |
HIP 32525 |
13.74 |
| 2026-08-13 00:00 |
06:48:41.17 |
+16:44:26.5 |
HIP 32525 |
23.71 |
| 2026-08-13 12:00 |
06:49:26.29 |
+16:42:35.0 |
HIP 32789 |
18.72 |
| 2026-08-14 00:00 |
06:50:11.32 |
+16:40:42.4 |
HIP 32789 |
13.48 |
| 2026-08-14 12:00 |
06:50:56.26 |
+16:38:48.9 |
HIP 32958 |
13.60 |
| 2026-08-15 00:00 |
06:51:41.12 |
+16:36:54.4 |
HIP 32958 |
2.70 |
| 2026-08-15 12:00 |
06:52:25.89 |
+16:34:59.0 |
HIP 32958 |
8.22 |
| 2026-08-16 00:00 |
06:53:10.57 |
+16:33:02.6 |
HIP 32958 |
19.10 |
| 2026-08-16 12:00 |
06:53:55.15 |
+16:31:05.2 |
HIP 32958 |
29.96 |
| 2026-08-17 00:00 |
06:54:39.65 |
+16:29:06.8 |
HIP 33230 |
29.59 |
| 2026-08-17 12:00 |
06:55:24.06 |
+16:27:07.5 |
HIP 33230 |
32.32 |
| 2026-08-18 00:00 |
06:56:08.37 |
+16:25:07.3 |
HIP 33469 |
29.99 |
| 2026-08-18 12:00 |
06:56:52.59 |
+16:23:06.1 |
HIP 33469 |
22.86 |
| 2026-08-19 00:00 |
06:57:36.72 |
+16:21:04.0 |
HIP 33469 |
19.45 |