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 · 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) |
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
$$
M_a = (11.515 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
11.515 |
| n |
6.000 |
| gf |
0.861 |
| gb |
-0.802 |
| k |
0.974 |
| 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) |
| 2026-06-01 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 |
| 2026-06-02 12:00 |
03:49:10.43 |
+19:32:04.5 |
HIP 17920 |
10.64 |
| 2026-06-03 00:00 |
03:49:51.39 |
+19:34:03.0 |
HIP 17920 |
0.83 |
| 2026-06-03 12:00 |
03:50:32.31 |
+19:36:00.6 |
HIP 17920 |
9.05 |
| 2026-06-04 00:00 |
03:51:13.19 |
+19:37:57.5 |
HIP 18091 |
11.41 |
| 2026-06-04 12:00 |
03:51:54.04 |
+19:39:53.6 |
HIP 18091 |
4.37 |
| 2026-06-05 00:00 |
03:52:34.85 |
+19:41:49.0 |
HIP 18091 |
10.01 |
| 2026-06-05 12:00 |
03:53:15.63 |
+19:43:43.6 |
HIP 18091 |
19.31 |
| 2026-06-06 00:00 |
03:53:56.36 |
+19:45:37.4 |
HIP 18091 |
28.92 |
| 2026-06-06 12:00 |
03:54:37.06 |
+19:47:30.4 |
HIP 18347 |
26.73 |
| 2026-06-07 00:00 |
03:55:17.72 |
+19:49:22.7 |
HIP 18347 |
26.52 |
| 2026-06-07 12:00 |
03:55:58.34 |
+19:51:14.2 |
HIP 18473 |
18.80 |
| 2026-06-08 00:00 |
03:56:38.91 |
+19:53:05.0 |
HIP 18473 |
12.37 |
| 2026-06-08 12:00 |
03:57:19.45 |
+19:54:55.0 |
HIP 18473 |
11.89 |
| 2026-06-09 00:00 |
03:57:59.95 |
+19:56:44.2 |
HIP 18473 |
17.83 |
| 2026-06-09 12:00 |
03:58:40.40 |
+19:58:32.6 |
HIP 18473 |
26.11 |
| 2026-06-10 00:00 |
03:59:20.81 |
+20:00:20.3 |
HIP 18721 |
25.77 |
| 2026-06-10 12:00 |
04:00:01.18 |
+20:02:07.2 |
HIP 18762 |
18.31 |
| 2026-06-11 00:00 |
04:00:41.50 |
+20:03:53.3 |
HIP 18762 |
10.04 |
| 2026-06-11 12:00 |
04:01:21.78 |
+20:05:38.6 |
HIP 18762 |
7.21 |
| 2026-06-12 00:00 |
04:02:02.01 |
+20:07:23.2 |
HIP 18762 |
13.71 |
| 2026-06-12 12:00 |
04:02:42.19 |
+20:09:07.0 |
HIP 18762 |
22.53 |
| 2026-06-13 00:00 |
04:03:22.33 |
+20:10:50.0 |
HIP 18762 |
31.78 |
| 2026-06-13 12:00 |
04:04:02.42 |
+20:12:32.2 |
HIP 19093 |
26.88 |
| 2026-06-14 00:00 |
04:04:42.47 |
+20:14:13.7 |
HIP 19093 |
21.19 |
| 2026-06-14 12:00 |
04:05:22.46 |
+20:15:54.3 |
HIP 19176 |
18.05 |
| 2026-06-15 00:00 |
04:06:02.40 |
+20:17:34.2 |
HIP 19176 |
8.56 |
| 2026-06-15 12:00 |
04:06:42.29 |
+20:19:13.4 |
HIP 19176 |
1.32 |
| 2026-06-16 00:00 |
04:07:22.13 |
+20:20:51.7 |
HIP 19176 |
10.50 |
| 2026-06-16 12:00 |
04:08:01.92 |
+20:22:29.3 |
HIP 19367 |
12.55 |
| 2026-06-17 00:00 |
04:08:41.65 |
+20:24:06.1 |
HIP 19367 |
3.35 |
| 2026-06-17 12:00 |
04:09:21.33 |
+20:25:42.1 |
HIP 19367 |
6.59 |
| 2026-06-18 00:00 |
04:10:00.95 |
+20:27:17.3 |
HIP 19367 |
15.91 |
| 2026-06-18 12:00 |
04:10:40.52 |
+20:28:51.8 |
HIP 19367 |
25.28 |
| 2026-06-19 00:00 |
04:11:20.03 |
+20:30:25.4 |
HIP 19616 |
18.87 |
| 2026-06-19 12:00 |
04:11:59.48 |
+20:31:58.3 |
HIP 19616 |
13.11 |
| 2026-06-20 00:00 |
04:12:38.87 |
+20:33:30.5 |
HIP 19665 |
10.81 |
| 2026-06-20 12:00 |
04:13:18.21 |
+20:35:01.8 |
HIP 19665 |
11.53 |
| 2026-06-21 00:00 |
04:13:57.49 |
+20:36:32.4 |
HIP 19665 |
17.96 |
| 2026-06-21 12:00 |
04:14:36.71 |
+20:38:02.2 |
HIP 19870 |
18.98 |
| 2026-06-22 00:00 |
04:15:15.86 |
+20:39:31.2 |
HIP 19870 |
11.49 |