メタデータ
| 項目 |
値 |
| Designation |
P/2020 M1 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2019-12-21T02:45:38.859840Z |
| Orbit solution date (soln_date, UTC) |
2023-02-06T22:13:22Z |
| Obs used |
51 |
| NEO |
- |
| M1 |
12.400 |
| K1 |
15.750 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2020-06-17T08:46:29.568000Z |
| Discovery magnitude (MPC) |
21.30 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2020-06-01.0000000 |
| e |
0.47691810 |
| q (au) |
2.660801 |
| a (au) |
5.086778 |
| i (deg) |
8.632593 |
| Ω (om, deg) |
142.955182 |
| ω (w, deg) |
67.851133 |
| M (ma, deg) |
13.993326 |
等級
散乱 + 全体線形
$$
M_a = (14.862 + 5.819\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
14.862 |
| n |
5.819 |
| gf |
1.000 |
| gb |
-0.638 |
| k |
0.800 |
| δ90 |
10.000 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
03:13:40.84 |
+08:26:35.8 |
HIP 14842 |
35.26 |
| 2026-09-20 12:00 |
03:13:35.38 |
+08:25:40.8 |
HIP 14842 |
33.63 |
| 2026-09-21 00:00 |
03:13:29.81 |
+08:24:45.5 |
HIP 14842 |
31.97 |
| 2026-09-21 12:00 |
03:13:24.11 |
+08:23:49.9 |
HIP 14842 |
30.28 |
| 2026-09-22 00:00 |
03:13:18.29 |
+08:22:53.9 |
HIP 14842 |
28.57 |
| 2026-09-22 12:00 |
03:13:12.36 |
+08:21:57.6 |
HIP 14842 |
26.83 |
| 2026-09-23 00:00 |
03:13:06.31 |
+08:21:01.0 |
HIP 14842 |
25.06 |
| 2026-09-23 12:00 |
03:13:00.14 |
+08:20:04.1 |
HIP 14842 |
23.26 |
| 2026-09-24 00:00 |
03:12:53.85 |
+08:19:06.9 |
HIP 14842 |
21.44 |
| 2026-09-24 12:00 |
03:12:47.45 |
+08:18:09.3 |
HIP 14842 |
19.59 |
| 2026-09-25 00:00 |
03:12:40.93 |
+08:17:11.5 |
HIP 14842 |
17.71 |
| 2026-09-25 12:00 |
03:12:34.29 |
+08:16:13.4 |
HIP 14842 |
15.81 |
| 2026-09-26 00:00 |
03:12:27.54 |
+08:15:15.0 |
HIP 14842 |
13.89 |
| 2026-09-26 12:00 |
03:12:20.68 |
+08:14:16.3 |
HIP 14842 |
11.94 |
| 2026-09-27 00:00 |
03:12:13.70 |
+08:13:17.3 |
HIP 14842 |
9.97 |
| 2026-09-27 12:00 |
03:12:06.61 |
+08:12:18.0 |
HIP 14842 |
7.99 |
| 2026-09-28 00:00 |
03:11:59.41 |
+08:11:18.5 |
HIP 14842 |
6.00 |
| 2026-09-28 12:00 |
03:11:52.09 |
+08:10:18.7 |
HIP 14842 |
4.04 |
| 2026-09-29 00:00 |
03:11:44.67 |
+08:09:18.7 |
HIP 14842 |
2.28 |
| 2026-09-29 12:00 |
03:11:37.13 |
+08:08:18.4 |
HIP 14842 |
1.69 |
| 2026-09-30 00:00 |
03:11:29.48 |
+08:07:17.9 |
HIP 14842 |
3.11 |
| 2026-09-30 12:00 |
03:11:21.73 |
+08:06:17.1 |
HIP 14842 |
5.09 |
| 2026-10-01 00:00 |
03:11:13.87 |
+08:05:16.1 |
HIP 14842 |
7.21 |
| 2026-10-01 12:00 |
03:11:05.89 |
+08:04:14.8 |
HIP 14842 |
9.40 |
| 2026-10-02 00:00 |
03:10:57.81 |
+08:03:13.4 |
HIP 14842 |
11.62 |
| 2026-10-02 12:00 |
03:10:49.63 |
+08:02:11.7 |
HIP 14842 |
13.88 |
| 2026-10-03 00:00 |
03:10:41.34 |
+08:01:09.8 |
HIP 14842 |
16.16 |
| 2026-10-03 12:00 |
03:10:32.94 |
+08:00:07.7 |
HIP 14842 |
18.48 |
| 2026-10-04 00:00 |
03:10:24.44 |
+07:59:05.4 |
HIP 14842 |
20.82 |
| 2026-10-04 12:00 |
03:10:15.84 |
+07:58:02.9 |
HIP 14842 |
23.19 |
| 2026-10-05 00:00 |
03:10:07.14 |
+07:57:00.3 |
HIP 14842 |
25.58 |
| 2026-10-05 12:00 |
03:09:58.33 |
+07:55:57.4 |
HIP 14842 |
28.00 |
| 2026-10-06 00:00 |
03:09:49.43 |
+07:54:54.4 |
HIP 14600 |
25.97 |
| 2026-10-06 12:00 |
03:09:40.42 |
+07:53:51.2 |
HIP 14600 |
23.58 |
| 2026-10-07 00:00 |
03:09:31.32 |
+07:52:47.9 |
HIP 14600 |
21.19 |
| 2026-10-07 12:00 |
03:09:22.11 |
+07:51:44.4 |
HIP 14600 |
18.80 |
| 2026-10-08 00:00 |
03:09:12.82 |
+07:50:40.8 |
HIP 14600 |
16.44 |
| 2026-10-08 12:00 |
03:09:03.42 |
+07:49:37.1 |
HIP 14600 |
14.11 |
| 2026-10-09 00:00 |
03:08:53.94 |
+07:48:33.2 |
HIP 14600 |
11.87 |
| 2026-10-09 12:00 |
03:08:44.36 |
+07:47:29.2 |
HIP 14600 |
9.79 |
| 2026-10-10 00:00 |
03:08:34.68 |
+07:46:25.1 |
HIP 14600 |
8.01 |
| 2026-10-10 12:00 |
03:08:24.92 |
+07:45:20.9 |
HIP 14600 |
6.80 |
| 2026-10-11 00:00 |
03:08:15.07 |
+07:44:16.6 |
HIP 14600 |
6.52 |