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 |
1.000 |
| gb |
-0.998 |
| 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) |
| 2026-05-12 00:00 |
04:16:45.84 |
+17:11:14.5 |
HIP 20019 |
19.16 |
| 2026-05-12 12:00 |
04:17:35.14 |
+17:12:45.9 |
HIP 20041 |
12.03 |
| 2026-05-13 00:00 |
04:18:24.47 |
+17:14:16.4 |
HIP 20086 |
11.05 |
| 2026-05-13 12:00 |
04:19:13.84 |
+17:15:45.9 |
HIP 20086 |
15.64 |
| 2026-05-14 00:00 |
04:20:03.23 |
+17:17:14.6 |
HIP 20146 |
19.42 |
| 2026-05-14 12:00 |
04:20:52.66 |
+17:18:42.2 |
HIP 20146 |
28.06 |
| 2026-05-15 00:00 |
04:21:42.12 |
+17:20:08.9 |
HIP 20455 |
21.56 |
| 2026-05-15 12:00 |
04:22:31.61 |
+17:21:34.7 |
HIP 20455 |
12.43 |
| 2026-05-16 00:00 |
04:23:21.13 |
+17:22:59.5 |
HIP 20542 |
11.24 |
| 2026-05-16 12:00 |
04:24:10.68 |
+17:24:23.4 |
HIP 20542 |
2.56 |
| 2026-05-17 00:00 |
04:25:00.25 |
+17:25:46.2 |
HIP 20542 |
13.04 |
| 2026-05-17 12:00 |
04:25:49.86 |
+17:27:08.1 |
HIP 20542 |
24.85 |
| 2026-05-18 00:00 |
04:26:39.49 |
+17:28:29.0 |
HIP 20756 |
26.90 |
| 2026-05-18 12:00 |
04:27:29.15 |
+17:29:49.0 |
HIP 20899 |
22.73 |
| 2026-05-19 00:00 |
04:28:18.83 |
+17:31:07.9 |
HIP 20935 |
14.78 |
| 2026-05-19 12:00 |
04:29:08.54 |
+17:32:25.9 |
HIP 20935 |
2.86 |
| 2026-05-20 00:00 |
04:29:58.27 |
+17:33:42.8 |
HIP 20971 |
7.35 |
| 2026-05-20 12:00 |
04:30:48.02 |
+17:34:58.8 |
HIP 21123 |
13.94 |
| 2026-05-21 00:00 |
04:31:37.80 |
+17:36:13.7 |
HIP 21123 |
6.37 |
| 2026-05-21 12:00 |
04:32:27.60 |
+17:37:27.7 |
HIP 21123 |
13.09 |
| 2026-05-22 00:00 |
04:33:17.42 |
+17:38:40.6 |
HIP 21332 |
21.12 |
| 2026-05-22 12:00 |
04:34:07.26 |
+17:39:52.5 |
HIP 21332 |
9.71 |
| 2026-05-23 00:00 |
04:34:57.12 |
+17:41:03.4 |
HIP 21332 |
5.24 |
| 2026-05-23 12:00 |
04:35:47.00 |
+17:42:13.3 |
HIP 21332 |
15.67 |
| 2026-05-24 00:00 |
04:36:36.89 |
+17:43:22.1 |
HIP 21332 |
27.36 |
| 2026-05-24 12:00 |
04:37:26.81 |
+17:44:30.0 |
HIP 21630 |
26.44 |
| 2026-05-25 00:00 |
04:38:16.74 |
+17:45:36.7 |
HIP 21630 |
21.80 |
| 2026-05-25 12:00 |
04:39:06.70 |
+17:46:42.5 |
HIP 21725 |
20.46 |
| 2026-05-26 00:00 |
04:39:56.66 |
+17:47:47.2 |
HIP 21725 |
18.46 |
| 2026-05-26 12:00 |
04:40:46.65 |
+17:48:50.9 |
HIP 21725 |
23.41 |
| 2026-05-27 00:00 |
04:41:36.65 |
+17:49:53.6 |
HIP 21899 |
13.18 |
| 2026-05-27 12:00 |
04:42:26.66 |
+17:50:55.2 |
HIP 21899 |
2.01 |
| 2026-05-28 00:00 |
04:43:16.69 |
+17:51:55.7 |
HIP 21899 |
10.95 |
| 2026-05-28 12:00 |
04:44:06.73 |
+17:52:55.2 |
HIP 21899 |
22.83 |
| 2026-05-29 00:00 |
04:44:56.79 |
+17:53:53.7 |
HIP 22224 |
28.27 |
| 2026-05-29 12:00 |
04:45:46.86 |
+17:54:51.0 |
HIP 22224 |
17.90 |
| 2026-05-30 00:00 |
04:46:36.95 |
+17:55:47.4 |
HIP 22224 |
11.28 |
| 2026-05-30 12:00 |
04:47:27.04 |
+17:56:42.6 |
HIP 22224 |
14.82 |
| 2026-05-31 00:00 |
04:48:17.15 |
+17:57:36.9 |
HIP 22265 |
20.24 |
| 2026-05-31 12:00 |
04:49:07.27 |
+17:58:30.0 |
HIP 22485 |
22.75 |
| 2026-06-01 00:00 |
04:49:57.40 |
+17:59:22.1 |
HIP 22485 |
17.69 |
| 2026-06-01 12:00 |
04:50:47.54 |
+18:00:13.1 |
HIP 22485 |
19.84 |
| 2026-06-02 00:00 |
04:51:37.70 |
+18:01:03.0 |
HIP 22485 |
27.57 |