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) |
| 2026-09-20 00:00 |
05:42:24.16 |
+22:10:27.7 |
HIP 27023 |
24.58 |
| 2026-09-20 12:00 |
05:42:37.20 |
+22:10:16.8 |
HIP 27023 |
21.99 |
| 2026-09-21 00:00 |
05:42:50.00 |
+22:10:05.7 |
HIP 27023 |
19.57 |
| 2026-09-21 12:00 |
05:43:02.54 |
+22:09:54.3 |
HIP 27023 |
17.37 |
| 2026-09-22 00:00 |
05:43:14.82 |
+22:09:42.7 |
HIP 27023 |
15.42 |
| 2026-09-22 12:00 |
05:43:26.85 |
+22:09:30.9 |
HIP 27023 |
13.82 |
| 2026-09-23 00:00 |
05:43:38.63 |
+22:09:19.0 |
HIP 27023 |
12.66 |
| 2026-09-23 12:00 |
05:43:50.14 |
+22:09:06.8 |
HIP 27023 |
12.02 |
| 2026-09-24 00:00 |
05:44:01.40 |
+22:08:54.4 |
HIP 27023 |
11.94 |
| 2026-09-24 12:00 |
05:44:12.40 |
+22:08:41.8 |
HIP 27023 |
12.40 |
| 2026-09-25 00:00 |
05:44:23.14 |
+22:08:29.0 |
HIP 27098 |
12.97 |
| 2026-09-25 12:00 |
05:44:33.61 |
+22:08:16.1 |
HIP 27098 |
11.98 |
| 2026-09-26 00:00 |
05:44:43.83 |
+22:08:02.9 |
HIP 27098 |
11.43 |
| 2026-09-26 12:00 |
05:44:53.77 |
+22:07:49.6 |
HIP 27098 |
11.35 |
| 2026-09-27 00:00 |
05:45:03.46 |
+22:07:36.1 |
HIP 27098 |
11.72 |
| 2026-09-27 12:00 |
05:45:12.87 |
+22:07:22.4 |
HIP 27098 |
12.45 |
| 2026-09-28 00:00 |
05:45:22.02 |
+22:07:08.5 |
HIP 27098 |
13.46 |
| 2026-09-28 12:00 |
05:45:30.91 |
+22:06:54.5 |
HIP 27098 |
14.66 |
| 2026-09-29 00:00 |
05:45:39.52 |
+22:06:40.2 |
HIP 27098 |
16.00 |
| 2026-09-29 12:00 |
05:45:47.85 |
+22:06:25.9 |
HIP 27098 |
17.41 |
| 2026-09-30 00:00 |
05:45:55.92 |
+22:06:11.3 |
HIP 27098 |
18.86 |
| 2026-09-30 12:00 |
05:46:03.71 |
+22:05:56.6 |
HIP 27098 |
20.32 |
| 2026-10-01 00:00 |
05:46:11.23 |
+22:05:41.8 |
HIP 27098 |
21.78 |
| 2026-10-01 12:00 |
05:46:18.47 |
+22:05:26.7 |
HIP 27098 |
23.22 |
| 2026-10-02 00:00 |
05:46:25.44 |
+22:05:11.6 |
HIP 27098 |
24.63 |
| 2026-10-02 12:00 |
05:46:32.12 |
+22:04:56.2 |
HIP 27098 |
26.01 |
| 2026-10-03 00:00 |
05:46:38.53 |
+22:04:40.8 |
HIP 27098 |
27.34 |
| 2026-10-03 12:00 |
05:46:44.65 |
+22:04:25.2 |
HIP 27320 |
28.21 |
| 2026-10-04 00:00 |
05:46:50.49 |
+22:04:09.4 |
HIP 27320 |
28.16 |
| 2026-10-04 12:00 |
05:46:56.05 |
+22:03:53.5 |
HIP 27320 |
28.19 |
| 2026-10-05 00:00 |
05:47:01.32 |
+22:03:37.5 |
HIP 27320 |
28.30 |
| 2026-10-05 12:00 |
05:47:06.31 |
+22:03:21.3 |
HIP 27320 |
28.46 |
| 2026-10-06 00:00 |
05:47:11.01 |
+22:03:05.0 |
HIP 27320 |
28.67 |
| 2026-10-06 12:00 |
05:47:15.42 |
+22:02:48.6 |
HIP 27320 |
28.93 |
| 2026-10-07 00:00 |
05:47:19.54 |
+22:02:32.0 |
HIP 27320 |
29.23 |
| 2026-10-07 12:00 |
05:47:23.38 |
+22:02:15.3 |
HIP 27320 |
29.55 |
| 2026-10-08 00:00 |
05:47:26.92 |
+22:01:58.5 |
HIP 27388 |
29.76 |
| 2026-10-08 12:00 |
05:47:30.17 |
+22:01:41.6 |
HIP 27388 |
29.84 |
| 2026-10-09 00:00 |
05:47:33.13 |
+22:01:24.5 |
HIP 27388 |
29.96 |
| 2026-10-09 12:00 |
05:47:35.79 |
+22:01:07.3 |
HIP 27388 |
30.11 |
| 2026-10-10 00:00 |
05:47:38.16 |
+22:00:50.1 |
HIP 27519 |
29.92 |
| 2026-10-10 12:00 |
05:47:40.24 |
+22:00:32.7 |
HIP 27519 |
29.36 |
| 2026-10-11 00:00 |
05:47:42.02 |
+22:00:15.2 |
HIP 27519 |
28.87 |