メタデータ
| 項目 |
値 |
| Designation |
486P/Leonard |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2025-04-03T20:04:11.291520Z |
| Orbit solution date (soln_date, UTC) |
2026-03-07T11:43:23Z |
| Obs used |
737 |
| NEO |
- |
| M1 |
14.600 |
| K1 |
6.750 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2018-06-14T10:08:30.048000Z |
| Discovery magnitude (MPC) |
18.50 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) |
2023-10-21.0000000 |
| e |
0.36396355 |
| q (au) |
2.308216 |
| a (au) |
3.629062 |
| i (deg) |
2.209421 |
| Ω (om, deg) |
219.032259 |
| ω (w, deg) |
93.965161 |
| M (ma, deg) |
284.321405 |
等級
散乱 + 全体線形
$$
M_a = (11.494 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
11.494 |
| n |
6.000 |
| gf |
0.885 |
| gb |
-0.806 |
| k |
0.976 |
| δ90 |
1.000 |
| 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
ファインディングチャート
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
03:19:22.21 |
+17:55:19.5 |
HIP 15381 |
21.05 |
| 2026-05-12 12:00 |
03:20:04.24 |
+17:57:49.9 |
HIP 15381 |
27.73 |
| 2026-05-13 00:00 |
03:20:46.25 |
+18:00:19.6 |
HIP 15724 |
30.37 |
| 2026-05-13 12:00 |
03:21:28.25 |
+18:02:48.7 |
HIP 15724 |
24.62 |
| 2026-05-14 00:00 |
03:22:10.24 |
+18:05:17.0 |
HIP 15724 |
22.40 |
| 2026-05-14 12:00 |
03:22:52.21 |
+18:07:44.6 |
HIP 15724 |
24.66 |
| 2026-05-15 00:00 |
03:23:34.17 |
+18:10:11.4 |
HIP 15808 |
23.19 |
| 2026-05-15 12:00 |
03:24:16.11 |
+18:12:37.6 |
HIP 15808 |
22.46 |
| 2026-05-16 00:00 |
03:24:58.04 |
+18:15:03.0 |
HIP 15808 |
26.10 |
| 2026-05-16 12:00 |
03:25:39.95 |
+18:17:27.7 |
HIP 15808 |
32.68 |
| 2026-05-17 00:00 |
03:26:21.84 |
+18:19:51.7 |
HIP 16077 |
27.35 |
| 2026-05-17 12:00 |
03:27:03.71 |
+18:22:15.0 |
HIP 16077 |
23.14 |
| 2026-05-18 00:00 |
03:27:45.57 |
+18:24:37.5 |
HIP 16077 |
23.07 |
| 2026-05-18 12:00 |
03:28:27.40 |
+18:26:59.3 |
HIP 16271 |
25.63 |
| 2026-05-19 00:00 |
03:29:09.21 |
+18:29:20.3 |
HIP 16271 |
17.46 |
| 2026-05-19 12:00 |
03:29:51.00 |
+18:31:40.7 |
HIP 16271 |
12.66 |
| 2026-05-20 00:00 |
03:30:32.77 |
+18:34:00.2 |
HIP 16271 |
14.93 |
| 2026-05-20 12:00 |
03:31:14.52 |
+18:36:19.1 |
HIP 16374 |
12.45 |
| 2026-05-21 00:00 |
03:31:56.25 |
+18:38:37.2 |
HIP 16441 |
9.84 |
| 2026-05-21 12:00 |
03:32:37.95 |
+18:40:54.5 |
HIP 16441 |
14.65 |
| 2026-05-22 00:00 |
03:33:19.63 |
+18:43:11.1 |
HIP 16674 |
20.08 |
| 2026-05-22 12:00 |
03:34:01.28 |
+18:45:27.0 |
HIP 16674 |
10.59 |
| 2026-05-23 00:00 |
03:34:42.91 |
+18:47:42.1 |
HIP 16674 |
5.10 |
| 2026-05-23 12:00 |
03:35:24.51 |
+18:49:56.4 |
HIP 16737 |
4.49 |
| 2026-05-24 00:00 |
03:36:06.08 |
+18:52:10.0 |
HIP 16737 |
11.47 |
| 2026-05-24 12:00 |
03:36:47.63 |
+18:54:22.8 |
HIP 16896 |
20.33 |
| 2026-05-25 00:00 |
03:37:29.15 |
+18:56:34.9 |
HIP 16896 |
20.83 |
| 2026-05-25 12:00 |
03:38:10.65 |
+18:58:46.3 |
HIP 16961 |
22.86 |
| 2026-05-26 00:00 |
03:38:52.11 |
+19:00:56.9 |
HIP 16961 |
22.85 |
| 2026-05-26 12:00 |
03:39:33.55 |
+19:03:06.7 |
HIP 16961 |
26.90 |
| 2026-05-27 00:00 |
03:40:14.96 |
+19:05:15.7 |
HIP 17234 |
24.70 |
| 2026-05-27 12:00 |
03:40:56.34 |
+19:07:24.1 |
HIP 17234 |
17.42 |
| 2026-05-28 00:00 |
03:41:37.69 |
+19:09:31.6 |
HIP 17234 |
14.05 |
| 2026-05-28 12:00 |
03:42:19.01 |
+19:11:38.4 |
HIP 17234 |
17.05 |
| 2026-05-29 00:00 |
03:43:00.29 |
+19:13:44.4 |
HIP 17421 |
24.01 |
| 2026-05-29 12:00 |
03:43:41.55 |
+19:15:49.7 |
HIP 17421 |
22.35 |
| 2026-05-30 00:00 |
03:44:22.78 |
+19:17:54.2 |
HIP 17408 |
23.55 |
| 2026-05-30 12:00 |
03:45:03.97 |
+19:19:58.0 |
HIP 17408 |
26.94 |
| 2026-05-31 00:00 |
03:45:45.13 |
+19:22:01.0 |
HIP 17503 |
30.41 |
| 2026-05-31 12:00 |
03:46:26.26 |
+19:24:03.2 |
HIP 17503 |
33.87 |
| 2026-06-01 00:00 |
03:47:07.35 |
+19:26:04.7 |
HIP 17503 |
39.57 |
| 2026-06-01 12:00 |
03:47:48.41 |
+19:28:05.4 |
HIP 17920 |
30.38 |
| 2026-06-02 00:00 |
03:48:29.44 |
+19:30:05.4 |
HIP 17920 |
20.50 |