メタデータ
| 項目 |
値 |
| Designation |
428P/Gibbs |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2014-11-14T13:43:38.052480Z |
| Orbit solution date (soln_date, UTC) |
2023-05-03T22:44:57Z |
| Obs used |
130 |
| NEO |
- |
| M1 |
11.700 |
| K1 |
22.750 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2021-08-16T03:08:49.632000Z |
| Discovery magnitude (MPC) |
20.00 T |
| Discovery observatory (MPC) |
Z84 · Calar Alto-Schmidt |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2017-07-29.0000000 |
| e |
0.51895674 |
| q (au) |
1.675591 |
| a (au) |
3.483245 |
| i (deg) |
8.514132 |
| Ω (om, deg) |
299.322409 |
| ω (w, deg) |
36.937480 |
| M (ma, deg) |
149.704035 |
等級
散乱 + 全体線形
$$
M_a = (14.349 + 5.458\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
14.349 |
| n |
5.458 |
| gf |
0.999 |
| gb |
-0.874 |
| k |
0.999 |
| δ90 |
9.999 |
| 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 |
12:30:15.89 |
-11:50:53.8 |
HIP 60981 |
13.71 |
| 2026-07-29 12:00 |
12:30:37.29 |
-11:52:19.2 |
HIP 60981 |
15.00 |
| 2026-07-30 00:00 |
12:30:58.84 |
-11:53:45.9 |
HIP 60981 |
17.93 |
| 2026-07-30 12:00 |
12:31:20.55 |
-11:55:13.6 |
HIP 60981 |
21.88 |
| 2026-07-31 00:00 |
12:31:42.39 |
-11:56:42.5 |
HIP 60981 |
26.42 |
| 2026-07-31 12:00 |
12:32:04.39 |
-11:58:12.6 |
HIP 61300 |
30.58 |
| 2026-08-01 00:00 |
12:32:26.53 |
-11:59:43.7 |
HIP 61300 |
28.07 |
| 2026-08-01 12:00 |
12:32:48.81 |
-12:01:16.0 |
HIP 61300 |
26.54 |
| 2026-08-02 00:00 |
12:33:11.24 |
-12:02:49.4 |
HIP 61300 |
26.19 |
| 2026-08-02 12:00 |
12:33:33.82 |
-12:04:23.9 |
HIP 61300 |
27.08 |
| 2026-08-03 00:00 |
12:33:56.53 |
-12:05:59.5 |
HIP 61449 |
24.10 |
| 2026-08-03 12:00 |
12:34:19.39 |
-12:07:36.2 |
HIP 61449 |
19.12 |
| 2026-08-04 00:00 |
12:34:42.39 |
-12:09:14.0 |
HIP 61449 |
14.75 |
| 2026-08-04 12:00 |
12:35:05.53 |
-12:10:52.8 |
HIP 61449 |
11.76 |
| 2026-08-05 00:00 |
12:35:28.82 |
-12:12:32.8 |
HIP 61486 |
10.23 |
| 2026-08-05 12:00 |
12:35:52.24 |
-12:14:13.8 |
HIP 61486 |
10.08 |
| 2026-08-06 00:00 |
12:36:15.80 |
-12:15:56.0 |
HIP 61486 |
13.06 |
| 2026-08-06 12:00 |
12:36:39.50 |
-12:17:39.1 |
HIP 61535 |
15.63 |
| 2026-08-07 00:00 |
12:37:03.34 |
-12:19:23.4 |
HIP 61535 |
16.44 |
| 2026-08-07 12:00 |
12:37:27.31 |
-12:21:08.7 |
HIP 61649 |
12.35 |
| 2026-08-08 00:00 |
12:37:51.42 |
-12:22:55.0 |
HIP 61649 |
6.31 |
| 2026-08-08 12:00 |
12:38:15.67 |
-12:24:42.4 |
HIP 61649 |
1.62 |
| 2026-08-09 00:00 |
12:38:40.05 |
-12:26:30.8 |
HIP 61649 |
6.52 |
| 2026-08-09 12:00 |
12:39:04.57 |
-12:28:20.2 |
HIP 61649 |
12.67 |
| 2026-08-10 00:00 |
12:39:29.22 |
-12:30:10.7 |
HIP 61649 |
18.93 |
| 2026-08-10 12:00 |
12:39:54.01 |
-12:32:02.2 |
HIP 61801 |
20.96 |
| 2026-08-11 00:00 |
12:40:18.93 |
-12:33:54.7 |
HIP 61801 |
19.81 |
| 2026-08-11 12:00 |
12:40:43.98 |
-12:35:48.3 |
HIP 61801 |
20.65 |
| 2026-08-12 00:00 |
12:41:09.16 |
-12:37:42.8 |
HIP 61910 |
23.18 |
| 2026-08-12 12:00 |
12:41:34.48 |
-12:39:38.3 |
HIP 61910 |
21.67 |
| 2026-08-13 00:00 |
12:41:59.92 |
-12:41:34.8 |
HIP 61910 |
22.03 |
| 2026-08-13 12:00 |
12:42:25.49 |
-12:43:32.3 |
HIP 61910 |
24.20 |
| 2026-08-14 00:00 |
12:42:51.19 |
-12:45:30.8 |
HIP 61910 |
27.80 |
| 2026-08-14 12:00 |
12:43:17.02 |
-12:47:30.2 |
HIP 62125 |
23.05 |
| 2026-08-15 00:00 |
12:43:42.97 |
-12:49:30.6 |
HIP 62125 |
19.26 |
| 2026-08-15 12:00 |
12:44:09.05 |
-12:51:31.9 |
HIP 62125 |
17.28 |
| 2026-08-16 00:00 |
12:44:35.26 |
-12:53:34.2 |
HIP 62125 |
17.75 |
| 2026-08-16 12:00 |
12:45:01.59 |
-12:55:37.4 |
HIP 62125 |
20.54 |
| 2026-08-17 00:00 |
12:45:28.04 |
-12:57:41.5 |
HIP 62125 |
24.91 |
| 2026-08-17 12:00 |
12:45:54.62 |
-12:59:46.6 |
HIP 62125 |
30.20 |
| 2026-08-18 00:00 |
12:46:21.32 |
-13:01:52.6 |
HIP 62433 |
33.63 |
| 2026-08-18 12:00 |
12:46:48.14 |
-13:03:59.5 |
HIP 62433 |
32.12 |
| 2026-08-19 00:00 |
12:47:15.08 |
-13:06:07.3 |
HIP 62433 |
32.06 |