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) |
| 2026-06-01 00:00 |
02:48:27.90 |
+08:24:41.0 |
HIP 13068 |
30.13 |
| 2026-06-01 12:00 |
02:48:43.08 |
+08:25:37.0 |
HIP 13110 |
29.66 |
| 2026-06-02 00:00 |
02:48:58.22 |
+08:26:32.6 |
HIP 13110 |
29.27 |
| 2026-06-02 12:00 |
02:49:13.33 |
+08:27:27.7 |
HIP 13110 |
29.38 |
| 2026-06-03 00:00 |
02:49:28.40 |
+08:28:22.5 |
HIP 13303 |
28.09 |
| 2026-06-03 12:00 |
02:49:43.45 |
+08:29:16.8 |
HIP 13303 |
25.13 |
| 2026-06-04 00:00 |
02:49:58.45 |
+08:30:10.8 |
HIP 13303 |
22.44 |
| 2026-06-04 12:00 |
02:50:13.42 |
+08:31:04.3 |
HIP 13303 |
20.11 |
| 2026-06-05 00:00 |
02:50:28.35 |
+08:31:57.4 |
HIP 13303 |
18.29 |
| 2026-06-05 12:00 |
02:50:43.25 |
+08:32:50.0 |
HIP 13303 |
17.13 |
| 2026-06-06 00:00 |
02:50:58.11 |
+08:33:42.3 |
HIP 13303 |
16.76 |
| 2026-06-06 12:00 |
02:51:12.93 |
+08:34:34.1 |
HIP 13303 |
17.22 |
| 2026-06-07 00:00 |
02:51:27.72 |
+08:35:25.5 |
HIP 13303 |
18.45 |
| 2026-06-07 12:00 |
02:51:42.46 |
+08:36:16.4 |
HIP 13422 |
16.92 |
| 2026-06-08 00:00 |
02:51:57.16 |
+08:37:06.9 |
HIP 13422 |
13.29 |
| 2026-06-08 12:00 |
02:52:11.83 |
+08:37:57.0 |
HIP 13422 |
9.75 |
| 2026-06-09 00:00 |
02:52:26.45 |
+08:38:46.6 |
HIP 13422 |
6.42 |
| 2026-06-09 12:00 |
02:52:41.03 |
+08:39:35.8 |
HIP 13422 |
3.85 |
| 2026-06-10 00:00 |
02:52:55.57 |
+08:40:24.6 |
HIP 13422 |
3.96 |
| 2026-06-10 12:00 |
02:53:10.07 |
+08:41:12.9 |
HIP 13422 |
6.60 |
| 2026-06-11 00:00 |
02:53:24.52 |
+08:42:00.7 |
HIP 13422 |
9.90 |
| 2026-06-11 12:00 |
02:53:38.93 |
+08:42:48.1 |
HIP 13422 |
13.38 |
| 2026-06-12 00:00 |
02:53:53.29 |
+08:43:35.1 |
HIP 13422 |
16.92 |
| 2026-06-12 12:00 |
02:54:07.61 |
+08:44:21.6 |
HIP 13422 |
20.47 |
| 2026-06-13 00:00 |
02:54:21.88 |
+08:45:07.6 |
HIP 13422 |
24.04 |
| 2026-06-13 12:00 |
02:54:36.11 |
+08:45:53.2 |
HIP 13422 |
27.60 |
| 2026-06-14 00:00 |
02:54:50.28 |
+08:46:38.3 |
HIP 13422 |
31.16 |
| 2026-06-14 12:00 |
02:55:04.41 |
+08:47:23.0 |
HIP 13679 |
29.88 |
| 2026-06-15 00:00 |
02:55:18.49 |
+08:48:07.2 |
HIP 13679 |
28.67 |
| 2026-06-15 12:00 |
02:55:32.52 |
+08:48:50.9 |
HIP 13679 |
27.87 |
| 2026-06-16 00:00 |
02:55:46.50 |
+08:49:34.1 |
HIP 13679 |
27.50 |
| 2026-06-16 12:00 |
02:56:00.43 |
+08:50:16.9 |
HIP 13679 |
27.57 |
| 2026-06-17 00:00 |
02:56:14.31 |
+08:50:59.2 |
HIP 13690 |
27.10 |
| 2026-06-17 12:00 |
02:56:28.13 |
+08:51:41.0 |
HIP 13690 |
26.47 |
| 2026-06-18 00:00 |
02:56:41.91 |
+08:52:22.4 |
HIP 13690 |
26.29 |
| 2026-06-18 12:00 |
02:56:55.62 |
+08:53:03.3 |
HIP 13690 |
26.57 |
| 2026-06-19 00:00 |
02:57:09.29 |
+08:53:43.7 |
HIP 13690 |
27.29 |
| 2026-06-19 12:00 |
02:57:22.90 |
+08:54:23.6 |
HIP 13690 |
28.41 |
| 2026-06-20 00:00 |
02:57:36.45 |
+08:55:03.0 |
HIP 13690 |
29.88 |
| 2026-06-20 12:00 |
02:57:49.95 |
+08:55:42.0 |
HIP 13954 |
27.92 |
| 2026-06-21 00:00 |
02:58:03.39 |
+08:56:20.4 |
HIP 13954 |
24.65 |
| 2026-06-21 12:00 |
02:58:16.78 |
+08:56:58.4 |
HIP 13954 |
21.42 |
| 2026-06-22 00:00 |
02:58:30.10 |
+08:57:35.9 |
HIP 13954 |
18.25 |