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 · 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) |
| 2026-05-12 00:00 |
08:20:09.79 |
+23:54:41.5 |
HIP 40833 |
6.47 |
| 2026-05-12 12:00 |
08:21:01.20 |
+23:51:39.4 |
HIP 40881 |
11.74 |
| 2026-05-13 00:00 |
08:21:52.77 |
+23:48:35.7 |
HIP 41076 |
21.19 |
| 2026-05-13 12:00 |
08:22:44.48 |
+23:45:30.5 |
HIP 41133 |
17.20 |
| 2026-05-14 00:00 |
08:23:36.34 |
+23:42:23.9 |
HIP 41133 |
10.39 |
| 2026-05-14 12:00 |
08:24:28.35 |
+23:39:15.7 |
HIP 41133 |
14.91 |
| 2026-05-15 00:00 |
08:25:20.51 |
+23:36:06.1 |
HIP 41244 |
21.41 |
| 2026-05-15 12:00 |
08:26:12.81 |
+23:32:54.9 |
HIP 41435 |
15.85 |
| 2026-05-16 00:00 |
08:27:05.25 |
+23:29:42.2 |
HIP 41435 |
7.83 |
| 2026-05-16 12:00 |
08:27:57.83 |
+23:26:28.1 |
HIP 41435 |
13.49 |
| 2026-05-17 00:00 |
08:28:50.55 |
+23:23:12.4 |
HIP 41460 |
24.04 |
| 2026-05-17 12:00 |
08:29:43.40 |
+23:19:55.2 |
HIP 41743 |
16.82 |
| 2026-05-18 00:00 |
08:30:36.39 |
+23:16:36.5 |
HIP 41743 |
12.68 |
| 2026-05-18 12:00 |
08:31:29.51 |
+23:13:16.3 |
HIP 41743 |
18.91 |
| 2026-05-19 00:00 |
08:32:22.76 |
+23:09:54.6 |
HIP 41743 |
29.61 |
| 2026-05-19 12:00 |
08:33:16.13 |
+23:06:31.4 |
HIP 42056 |
38.93 |
| 2026-05-20 00:00 |
08:34:09.64 |
+23:03:06.7 |
HIP 42056 |
32.71 |
| 2026-05-20 12:00 |
08:35:03.26 |
+22:59:40.5 |
HIP 42253 |
29.99 |
| 2026-05-21 00:00 |
08:35:57.01 |
+22:56:12.8 |
HIP 42253 |
23.00 |
| 2026-05-21 12:00 |
08:36:50.88 |
+22:52:43.6 |
HIP 42253 |
22.12 |
| 2026-05-22 00:00 |
08:37:44.86 |
+22:49:12.9 |
HIP 42443 |
20.67 |
| 2026-05-22 12:00 |
08:38:38.96 |
+22:45:40.7 |
HIP 42443 |
8.63 |
| 2026-05-23 00:00 |
08:39:33.17 |
+22:42:07.0 |
HIP 42443 |
7.62 |
| 2026-05-23 12:00 |
08:40:27.50 |
+22:38:31.8 |
HIP 42443 |
19.52 |
| 2026-05-24 00:00 |
08:41:21.93 |
+22:34:55.1 |
HIP 42443 |
32.34 |
| 2026-05-24 12:00 |
08:42:16.47 |
+22:31:17.0 |
HIP 42840 |
23.57 |
| 2026-05-25 00:00 |
08:43:11.12 |
+22:27:37.3 |
HIP 42840 |
17.14 |
| 2026-05-25 12:00 |
08:44:05.87 |
+22:23:56.2 |
HIP 42840 |
19.44 |
| 2026-05-26 00:00 |
08:45:00.73 |
+22:20:13.5 |
HIP 43078 |
20.41 |
| 2026-05-26 12:00 |
08:45:55.69 |
+22:16:29.4 |
HIP 43078 |
8.98 |
| 2026-05-27 00:00 |
08:46:50.74 |
+22:12:43.8 |
HIP 43078 |
9.80 |
| 2026-05-27 12:00 |
08:47:45.90 |
+22:08:56.7 |
HIP 43275 |
17.77 |
| 2026-05-28 00:00 |
08:48:41.15 |
+22:05:08.2 |
HIP 43275 |
10.42 |
| 2026-05-28 12:00 |
08:49:36.49 |
+22:01:18.2 |
HIP 43275 |
16.08 |
| 2026-05-29 00:00 |
08:50:31.93 |
+21:57:26.6 |
HIP 43538 |
21.30 |
| 2026-05-29 12:00 |
08:51:27.46 |
+21:53:33.7 |
HIP 43538 |
10.72 |
| 2026-05-30 00:00 |
08:52:23.08 |
+21:49:39.2 |
HIP 43538 |
11.77 |
| 2026-05-30 12:00 |
08:53:18.79 |
+21:45:43.3 |
HIP 43538 |
22.96 |
| 2026-05-31 00:00 |
08:54:14.59 |
+21:41:45.9 |
HIP 43855 |
24.25 |
| 2026-05-31 12:00 |
08:55:10.47 |
+21:37:47.0 |
HIP 43855 |
11.88 |
| 2026-06-01 00:00 |
08:56:06.44 |
+21:33:46.6 |
HIP 43855 |
7.95 |
| 2026-06-01 12:00 |
08:57:02.49 |
+21:29:44.8 |
HIP 43985 |
10.31 |
| 2026-06-02 00:00 |
08:57:58.62 |
+21:25:41.6 |
HIP 43985 |
8.84 |