390P/Gibbs
メタデータ
| 項目 |
値 |
| Designation |
390P/Gibbs |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2020-03-23T23:00:23.420160Z |
| Orbit solution date (soln_date, UTC) |
2024-03-04T23:13:05Z |
| Obs used |
339 |
| NEO |
- |
| M1 |
12.300 |
| K1 |
10.000 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2019-10-21T05:56:28.665600Z |
| Discovery magnitude (MPC) |
18.45 c |
| Discovery observatory (MPC) |
T05 · ATLAS-HKO, Haleakala |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2016-03-25.0000000 |
| e |
0.70581897 |
| q (au) |
1.709156 |
| a (au) |
5.809877 |
| i (deg) |
18.522010 |
| Ω (om, deg) |
152.717702 |
| ω (w, deg) |
231.735413 |
| M (ma, deg) |
257.247066 |
等級
散乱 + 全体線形
$$
M_a = (12.035 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
12.035 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.694 |
| k |
0.800 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 2019-08-08 |
2020-01-21 |
+11.1256 |
-3.908 |
| 2020-09-01 |
2021-03-06 |
+1.2842 |
-0.774 |
log10 r = log10(太陽距離/AU)、Δ = 地球距離(AU)
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
13:39:48.11 |
+04:16:23.3 |
HIP 66582 |
21.82 |
| 2026-02-03 12:00 |
13:39:46.79 |
+04:17:23.8 |
HIP 66582 |
22.45 |
| 2026-02-04 00:00 |
13:39:45.37 |
+04:18:25.0 |
HIP 66582 |
23.11 |
| 2026-02-04 12:00 |
13:39:43.84 |
+04:19:26.6 |
HIP 66582 |
23.79 |
| 2026-02-05 00:00 |
13:39:42.21 |
+04:20:28.8 |
HIP 66582 |
24.50 |
| 2026-02-05 12:00 |
13:39:40.49 |
+04:21:31.4 |
HIP 66582 |
25.23 |
| 2026-02-06 00:00 |
13:39:38.65 |
+04:22:34.6 |
HIP 66582 |
25.99 |
| 2026-02-06 12:00 |
13:39:36.72 |
+04:23:38.3 |
HIP 66582 |
26.78 |
| 2026-02-07 00:00 |
13:39:34.69 |
+04:24:42.5 |
HIP 66582 |
27.59 |
| 2026-02-07 12:00 |
13:39:32.55 |
+04:25:47.2 |
HIP 66582 |
28.42 |
| 2026-02-08 00:00 |
13:39:30.32 |
+04:26:52.3 |
HIP 66582 |
29.29 |
| 2026-02-08 12:00 |
13:39:27.98 |
+04:27:58.0 |
HIP 66582 |
30.17 |
| 2026-02-09 00:00 |
13:39:25.54 |
+04:29:04.1 |
HIP 66582 |
31.09 |
| 2026-02-09 12:00 |
13:39:23.00 |
+04:30:10.7 |
HIP 66582 |
32.03 |
| 2026-02-10 00:00 |
13:39:20.36 |
+04:31:17.8 |
HIP 66446 |
31.67 |
| 2026-02-10 12:00 |
13:39:17.62 |
+04:32:25.4 |
HIP 66446 |
31.24 |
| 2026-02-11 00:00 |
13:39:14.77 |
+04:33:33.4 |
HIP 66446 |
30.85 |
| 2026-02-11 12:00 |
13:39:11.83 |
+04:34:41.9 |
HIP 66446 |
30.48 |
| 2026-02-12 00:00 |
13:39:08.79 |
+04:35:50.8 |
HIP 66446 |
30.16 |
| 2026-02-12 12:00 |
13:39:05.64 |
+04:37:00.1 |
HIP 66446 |
29.87 |
| 2026-02-13 00:00 |
13:39:02.40 |
+04:38:09.9 |
HIP 66446 |
29.63 |
| 2026-02-13 12:00 |
13:38:59.05 |
+04:39:20.1 |
HIP 66446 |
29.43 |
| 2026-02-14 00:00 |
13:38:55.61 |
+04:40:30.8 |
HIP 66446 |
29.29 |
| 2026-02-14 12:00 |
13:38:52.07 |
+04:41:41.9 |
HIP 66446 |
29.20 |
| 2026-02-15 00:00 |
13:38:48.43 |
+04:42:53.3 |
HIP 66446 |
29.17 |
| 2026-02-15 12:00 |
13:38:44.69 |
+04:44:05.2 |
HIP 66446 |
29.20 |
| 2026-02-16 00:00 |
13:38:40.85 |
+04:45:17.5 |
HIP 66446 |
29.30 |
| 2026-02-16 12:00 |
13:38:36.92 |
+04:46:30.2 |
HIP 66446 |
29.47 |
| 2026-02-17 00:00 |
13:38:32.88 |
+04:47:43.2 |
HIP 66446 |
29.71 |
| 2026-02-17 12:00 |
13:38:28.75 |
+04:48:56.7 |
HIP 66446 |
30.02 |
| 2026-02-18 00:00 |
13:38:24.52 |
+04:50:10.5 |
HIP 66446 |
30.40 |
| 2026-02-18 12:00 |
13:38:20.20 |
+04:51:24.7 |
HIP 66446 |
30.86 |
| 2026-02-19 00:00 |
13:38:15.78 |
+04:52:39.2 |
HIP 66446 |
31.39 |
| 2026-02-19 12:00 |
13:38:11.27 |
+04:53:54.1 |
HIP 66446 |
31.99 |
| 2026-02-20 00:00 |
13:38:06.65 |
+04:55:09.3 |
HIP 66446 |
32.66 |
| 2026-02-20 12:00 |
13:38:01.95 |
+04:56:24.9 |
HIP 66446 |
33.40 |
| 2026-02-21 00:00 |
13:37:57.15 |
+04:57:40.8 |
HIP 66446 |
34.21 |
| 2026-02-21 12:00 |
13:37:52.26 |
+04:58:57.0 |
HIP 66446 |
35.09 |
| 2026-02-22 00:00 |
13:37:47.27 |
+05:00:13.5 |
HIP 66446 |
36.04 |
| 2026-02-22 12:00 |
13:37:42.19 |
+05:01:30.3 |
HIP 66446 |
37.04 |
| 2026-02-23 00:00 |
13:37:37.02 |
+05:02:47.5 |
HIP 66586 |
36.94 |
| 2026-02-23 12:00 |
13:37:31.76 |
+05:04:04.9 |
HIP 66586 |
36.62 |
| 2026-02-24 00:00 |
13:37:26.41 |
+05:05:22.6 |
HIP 66586 |
36.39 |