メタデータ
| 項目 |
値 |
| Designation |
407P/PANSTARRS-Fuls |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2020-01-31T19:46:09.442560Z |
| Orbit solution date (soln_date, UTC) |
2022-12-31T16:14:11Z |
| Obs used |
734 |
| NEO |
- |
| M1 |
7.200 |
| K1 |
29.250 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2019-12-21T12:46:27.264000Z |
| Discovery magnitude (MPC) |
18.80 G |
| Discovery observatory (MPC) |
G96 · University of Arizona Mt. Lemmon Survey |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2019-10-22.0000000 |
| e |
0.38496514 |
| q (au) |
2.124832 |
| a (au) |
3.454816 |
| i (deg) |
4.896248 |
| Ω (om, deg) |
80.835926 |
| ω (w, deg) |
92.339614 |
| M (ma, deg) |
344.371557 |
等級
散乱 + 全体線形
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 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 |
10:49:29.72 |
+11:21:47.4 |
HIP 53039 |
27.46 |
| 2026-07-29 12:00 |
10:50:29.41 |
+11:15:29.7 |
HIP 53039 |
21.50 |
| 2026-07-30 00:00 |
10:51:29.10 |
+11:09:11.3 |
HIP 53115 |
14.29 |
| 2026-07-30 12:00 |
10:52:28.79 |
+11:02:52.2 |
HIP 53200 |
15.34 |
| 2026-07-31 00:00 |
10:53:28.48 |
+10:56:32.4 |
HIP 53200 |
22.71 |
| 2026-07-31 12:00 |
10:54:28.17 |
+10:50:11.8 |
HIP 53200 |
36.14 |
| 2026-08-01 00:00 |
10:55:27.86 |
+10:43:50.6 |
HIP 53585 |
34.19 |
| 2026-08-01 12:00 |
10:56:27.55 |
+10:37:28.7 |
HIP 53585 |
19.31 |
| 2026-08-02 00:00 |
10:57:27.24 |
+10:31:06.2 |
HIP 53585 |
9.35 |
| 2026-08-02 12:00 |
10:58:26.94 |
+10:24:42.9 |
HIP 53585 |
17.72 |
| 2026-08-03 00:00 |
10:59:26.63 |
+10:18:19.0 |
HIP 53727 |
22.52 |
| 2026-08-03 12:00 |
11:00:26.32 |
+10:11:54.5 |
HIP 53727 |
20.73 |
| 2026-08-04 00:00 |
11:01:26.02 |
+10:05:29.3 |
HIP 53934 |
16.01 |
| 2026-08-04 12:00 |
11:02:25.71 |
+09:59:03.5 |
HIP 53937 |
6.47 |
| 2026-08-05 00:00 |
11:03:25.40 |
+09:52:37.0 |
HIP 53937 |
18.38 |
| 2026-08-05 12:00 |
11:04:25.10 |
+09:46:09.9 |
HIP 53937 |
33.91 |
| 2026-08-06 00:00 |
11:05:24.79 |
+09:39:42.3 |
HIP 54346 |
24.74 |
| 2026-08-06 12:00 |
11:06:24.49 |
+09:33:14.0 |
HIP 54346 |
10.66 |
| 2026-08-07 00:00 |
11:07:24.19 |
+09:26:45.1 |
HIP 54346 |
11.48 |
| 2026-08-07 12:00 |
11:08:23.88 |
+09:20:15.7 |
HIP 54417 |
19.34 |
| 2026-08-08 00:00 |
11:09:23.58 |
+09:13:45.6 |
HIP 54417 |
22.74 |
| 2026-08-08 12:00 |
11:10:23.28 |
+09:07:15.1 |
HIP 54417 |
34.34 |
| 2026-08-09 00:00 |
11:11:22.98 |
+09:00:43.9 |
HIP 54789 |
34.76 |
| 2026-08-09 12:00 |
11:12:22.68 |
+08:54:12.2 |
HIP 54789 |
20.78 |
| 2026-08-10 00:00 |
11:13:22.37 |
+08:47:40.0 |
HIP 54789 |
13.25 |
| 2026-08-10 12:00 |
11:14:22.07 |
+08:41:07.3 |
HIP 54789 |
20.97 |
| 2026-08-11 00:00 |
11:15:21.77 |
+08:34:34.0 |
HIP 54789 |
35.01 |
| 2026-08-11 12:00 |
11:16:21.47 |
+08:28:00.3 |
HIP 54863 |
42.27 |
| 2026-08-12 00:00 |
11:17:21.16 |
+08:21:26.1 |
HIP 55122 |
36.82 |
| 2026-08-12 12:00 |
11:18:20.86 |
+08:14:51.3 |
HIP 55352 |
27.06 |
| 2026-08-13 00:00 |
11:19:20.56 |
+08:08:16.2 |
HIP 55352 |
18.71 |
| 2026-08-13 12:00 |
11:20:20.25 |
+08:01:40.5 |
HIP 55352 |
22.16 |
| 2026-08-14 00:00 |
11:21:19.94 |
+07:55:04.5 |
HIP 55337 |
29.05 |
| 2026-08-14 12:00 |
11:22:19.63 |
+07:48:27.9 |
HIP 55337 |
38.07 |
| 2026-08-15 00:00 |
11:23:19.32 |
+07:41:51.0 |
HIP 55751 |
34.74 |
| 2026-08-15 12:00 |
11:24:19.01 |
+07:35:13.7 |
HIP 55751 |
27.40 |
| 2026-08-16 00:00 |
11:25:18.69 |
+07:28:35.9 |
HIP 55751 |
28.63 |
| 2026-08-16 12:00 |
11:26:18.37 |
+07:21:57.8 |
HIP 55988 |
33.42 |
| 2026-08-17 00:00 |
11:27:18.05 |
+07:15:19.3 |
HIP 55988 |
23.51 |
| 2026-08-17 12:00 |
11:28:17.72 |
+07:08:40.4 |
HIP 55988 |
22.68 |
| 2026-08-18 00:00 |
11:29:17.39 |
+07:02:01.2 |
HIP 56046 |
13.87 |
| 2026-08-18 12:00 |
11:30:17.06 |
+06:55:21.7 |
HIP 56143 |
5.35 |
| 2026-08-19 00:00 |
11:31:16.73 |
+06:48:41.8 |
HIP 56143 |
12.46 |