メタデータ
| 項目 |
値 |
| Designation |
388P/Gibbs |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2019-07-22T08:53:19.518720Z |
| Orbit solution date (soln_date, UTC) |
2021-09-20T00:13:09Z |
| Obs used |
133 |
| NEO |
- |
| M1 |
10.900 |
| K1 |
18.250 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2014-07-13.0000000 |
| e |
0.61889291 |
| q (au) |
1.996757 |
| a (au) |
5.239360 |
| i (deg) |
23.880476 |
| Ω (om, deg) |
37.155097 |
| ω (w, deg) |
42.471541 |
| M (ma, deg) |
209.162134 |
等級
散乱 + 全体線形
$$
M_a = (11.376 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
11.376 |
| 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 |
17:12:37.23 |
-43:20:22.7 |
HIP 84143 |
7.93 |
| 2026-07-29 12:00 |
17:12:27.11 |
-43:19:31.6 |
HIP 84143 |
6.15 |
| 2026-07-30 00:00 |
17:12:17.14 |
-43:18:40.1 |
HIP 84143 |
4.59 |
| 2026-07-30 12:00 |
17:12:07.31 |
-43:17:48.3 |
HIP 84143 |
3.51 |
| 2026-07-31 00:00 |
17:11:57.64 |
-43:16:56.1 |
HIP 84143 |
3.36 |
| 2026-07-31 12:00 |
17:11:48.11 |
-43:16:03.7 |
HIP 84143 |
4.22 |
| 2026-08-01 00:00 |
17:11:38.74 |
-43:15:10.9 |
HIP 84143 |
5.61 |
| 2026-08-01 12:00 |
17:11:29.51 |
-43:14:17.9 |
HIP 84143 |
7.22 |
| 2026-08-02 00:00 |
17:11:20.44 |
-43:13:24.6 |
HIP 84143 |
8.92 |
| 2026-08-02 12:00 |
17:11:11.51 |
-43:12:31.0 |
HIP 84143 |
10.66 |
| 2026-08-03 00:00 |
17:11:02.75 |
-43:11:37.1 |
HIP 84143 |
12.40 |
| 2026-08-03 12:00 |
17:10:54.13 |
-43:10:42.9 |
HIP 84143 |
14.14 |
| 2026-08-04 00:00 |
17:10:45.67 |
-43:09:48.5 |
HIP 84143 |
15.87 |
| 2026-08-04 12:00 |
17:10:37.36 |
-43:08:53.9 |
HIP 84143 |
17.59 |
| 2026-08-05 00:00 |
17:10:29.22 |
-43:07:59.0 |
HIP 84143 |
19.29 |
| 2026-08-05 12:00 |
17:10:21.22 |
-43:07:03.9 |
HIP 84143 |
20.97 |
| 2026-08-06 00:00 |
17:10:13.39 |
-43:06:08.6 |
HIP 84143 |
22.64 |
| 2026-08-06 12:00 |
17:10:05.71 |
-43:05:13.1 |
HIP 84143 |
24.28 |
| 2026-08-07 00:00 |
17:09:58.19 |
-43:04:17.4 |
HIP 83818 |
24.43 |
| 2026-08-07 12:00 |
17:09:50.83 |
-43:03:21.5 |
HIP 83818 |
22.92 |
| 2026-08-08 00:00 |
17:09:43.62 |
-43:02:25.4 |
HIP 83818 |
21.45 |
| 2026-08-08 12:00 |
17:09:36.58 |
-43:01:29.1 |
HIP 83818 |
20.03 |
| 2026-08-09 00:00 |
17:09:29.70 |
-43:00:32.6 |
HIP 83818 |
18.67 |
| 2026-08-09 12:00 |
17:09:22.98 |
-42:59:36.0 |
HIP 83818 |
17.37 |
| 2026-08-10 00:00 |
17:09:16.43 |
-42:58:39.2 |
HIP 83818 |
16.14 |
| 2026-08-10 12:00 |
17:09:10.03 |
-42:57:42.3 |
HIP 83818 |
15.00 |
| 2026-08-11 00:00 |
17:09:03.80 |
-42:56:45.3 |
HIP 83818 |
13.96 |
| 2026-08-11 12:00 |
17:08:57.73 |
-42:55:48.1 |
HIP 83818 |
13.03 |
| 2026-08-12 00:00 |
17:08:51.83 |
-42:54:50.8 |
HIP 83818 |
12.24 |
| 2026-08-12 12:00 |
17:08:46.09 |
-42:53:53.5 |
HIP 83818 |
11.60 |
| 2026-08-13 00:00 |
17:08:40.51 |
-42:52:56.0 |
HIP 83818 |
11.14 |
| 2026-08-13 12:00 |
17:08:35.10 |
-42:51:58.4 |
HIP 83882 |
10.33 |
| 2026-08-14 00:00 |
17:08:29.86 |
-42:51:00.7 |
HIP 83882 |
9.52 |
| 2026-08-14 12:00 |
17:08:24.78 |
-42:50:02.9 |
HIP 83882 |
8.83 |
| 2026-08-15 00:00 |
17:08:19.86 |
-42:49:05.1 |
HIP 83882 |
8.29 |
| 2026-08-15 12:00 |
17:08:15.12 |
-42:48:07.2 |
HIP 83882 |
7.92 |
| 2026-08-16 00:00 |
17:08:10.53 |
-42:47:09.3 |
HIP 83882 |
7.72 |
| 2026-08-16 12:00 |
17:08:06.12 |
-42:46:11.3 |
HIP 83882 |
7.71 |
| 2026-08-17 00:00 |
17:08:01.87 |
-42:45:13.3 |
HIP 83882 |
7.88 |
| 2026-08-17 12:00 |
17:07:57.79 |
-42:44:15.2 |
HIP 83882 |
8.21 |
| 2026-08-18 00:00 |
17:07:53.87 |
-42:43:17.2 |
HIP 83882 |
8.66 |
| 2026-08-18 12:00 |
17:07:50.12 |
-42:42:19.1 |
HIP 83882 |
9.23 |
| 2026-08-19 00:00 |
17:07:46.54 |
-42:41:21.0 |
HIP 83882 |
9.87 |