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) |
| 2026-03-26 00:00 |
02:13:29.05 |
+05:34:33.1 |
HIP 10333 |
13.13 |
| 2026-03-26 12:00 |
02:13:43.48 |
+05:36:00.3 |
HIP 10333 |
16.06 |
| 2026-03-27 00:00 |
02:13:57.96 |
+05:37:27.6 |
HIP 10333 |
19.33 |
| 2026-03-27 12:00 |
02:14:12.48 |
+05:38:54.8 |
HIP 10419 |
21.68 |
| 2026-03-28 00:00 |
02:14:27.04 |
+05:40:22.0 |
HIP 10419 |
20.42 |
| 2026-03-28 12:00 |
02:14:41.64 |
+05:41:49.2 |
HIP 10419 |
19.86 |
| 2026-03-29 00:00 |
02:14:56.28 |
+05:43:16.4 |
HIP 10419 |
20.06 |
| 2026-03-29 12:00 |
02:15:10.97 |
+05:44:43.5 |
HIP 10419 |
21.02 |
| 2026-03-30 00:00 |
02:15:25.69 |
+05:46:10.5 |
HIP 10419 |
22.63 |
| 2026-03-30 12:00 |
02:15:40.46 |
+05:47:37.5 |
HIP 10448 |
24.72 |
| 2026-03-31 00:00 |
02:15:55.26 |
+05:49:04.5 |
HIP 10448 |
26.11 |
| 2026-03-31 12:00 |
02:16:10.10 |
+05:50:31.4 |
HIP 10678 |
26.51 |
| 2026-04-01 00:00 |
02:16:24.98 |
+05:51:58.3 |
HIP 10678 |
25.31 |
| 2026-04-01 12:00 |
02:16:39.90 |
+05:53:25.1 |
HIP 10678 |
24.69 |
| 2026-04-02 00:00 |
02:16:54.85 |
+05:54:51.8 |
HIP 10678 |
24.70 |
| 2026-04-02 12:00 |
02:17:09.85 |
+05:56:18.5 |
HIP 10678 |
25.34 |
| 2026-04-03 00:00 |
02:17:24.87 |
+05:57:45.1 |
HIP 10678 |
26.58 |
| 2026-04-03 12:00 |
02:17:39.93 |
+05:59:11.6 |
HIP 10678 |
28.33 |
| 2026-04-04 00:00 |
02:17:55.03 |
+06:00:38.1 |
HIP 10678 |
30.52 |
| 2026-04-04 12:00 |
02:18:10.16 |
+06:02:04.4 |
HIP 10678 |
33.05 |
| 2026-04-05 00:00 |
02:18:25.32 |
+06:03:30.7 |
HIP 10678 |
35.86 |
| 2026-04-05 12:00 |
02:18:40.52 |
+06:04:56.9 |
HIP 10747 |
37.75 |
| 2026-04-06 00:00 |
02:18:55.75 |
+06:06:23.0 |
HIP 10747 |
37.15 |
| 2026-04-06 12:00 |
02:19:11.01 |
+06:07:49.1 |
HIP 10747 |
36.98 |
| 2026-04-07 00:00 |
02:19:26.30 |
+06:09:15.0 |
HIP 10747 |
37.26 |
| 2026-04-07 12:00 |
02:19:41.63 |
+06:10:40.8 |
HIP 10957 |
36.23 |
| 2026-04-08 00:00 |
02:19:56.98 |
+06:12:06.6 |
HIP 10957 |
35.34 |
| 2026-04-08 12:00 |
02:20:12.36 |
+06:13:32.2 |
HIP 10957 |
34.90 |
| 2026-04-09 00:00 |
02:20:27.78 |
+06:14:57.7 |
HIP 10957 |
34.93 |
| 2026-04-09 12:00 |
02:20:43.22 |
+06:16:23.1 |
HIP 10957 |
35.44 |
| 2026-04-10 00:00 |
02:20:58.69 |
+06:17:48.4 |
HIP 10957 |
36.40 |
| 2026-04-10 12:00 |
02:21:14.19 |
+06:19:13.6 |
HIP 11132 |
35.67 |
| 2026-04-11 00:00 |
02:21:29.71 |
+06:20:38.6 |
HIP 11151 |
32.89 |
| 2026-04-11 12:00 |
02:21:45.26 |
+06:22:03.5 |
HIP 11151 |
28.82 |
| 2026-04-12 00:00 |
02:22:00.84 |
+06:23:28.3 |
HIP 11151 |
24.76 |
| 2026-04-12 12:00 |
02:22:16.44 |
+06:24:53.0 |
HIP 11151 |
20.72 |
| 2026-04-13 00:00 |
02:22:32.07 |
+06:26:17.5 |
HIP 11151 |
16.72 |
| 2026-04-13 12:00 |
02:22:47.72 |
+06:27:41.9 |
HIP 11151 |
12.80 |
| 2026-04-14 00:00 |
02:23:03.40 |
+06:29:06.1 |
HIP 11151 |
9.07 |
| 2026-04-14 12:00 |
02:23:19.10 |
+06:30:30.2 |
HIP 11151 |
5.90 |
| 2026-04-15 00:00 |
02:23:34.82 |
+06:31:54.1 |
HIP 11151 |
4.68 |
| 2026-04-15 12:00 |
02:23:50.56 |
+06:33:17.9 |
HIP 11151 |
6.59 |
| 2026-04-16 00:00 |
02:24:06.32 |
+06:34:41.5 |
HIP 11151 |
9.97 |