メタデータ
| 項目 |
値 |
| Designation |
C/2020 N1 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2021-03-12T05:28:54.451200Z |
| Orbit solution date (soln_date, UTC) |
2022-04-08T01:42:44Z |
| Obs used |
856 |
| NEO |
- |
| M1 |
15.500 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2020-07-03T13:50:17.635200Z |
| Discovery magnitude (MPC) |
20.75 i |
| 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) |
2020-11-27.0000000 |
| e |
1.00050582 |
| q (au) |
1.320692 |
| a (au) |
-2610.973764 |
| i (deg) |
29.703772 |
| Ω (om, deg) |
279.981658 |
| ω (w, deg) |
186.772725 |
| M (ma, deg) |
-0.000777 |
等級
散乱 + 全体線形
$$
M_a = (16.174 + 3.247\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
16.174 |
| n |
3.247 |
| gf |
1.000 |
| gb |
-0.862 |
| 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) |
| 2026-05-12 00:00 |
17:00:09.38 |
-36:38:42.0 |
HIP 83284 |
13.46 |
| 2026-05-12 12:00 |
17:00:01.37 |
-36:38:38.5 |
HIP 83284 |
15.01 |
| 2026-05-13 00:00 |
16:59:53.34 |
-36:38:34.8 |
HIP 83284 |
16.59 |
| 2026-05-13 12:00 |
16:59:45.26 |
-36:38:30.7 |
HIP 83284 |
18.18 |
| 2026-05-14 00:00 |
16:59:37.15 |
-36:38:26.3 |
HIP 83041 |
17.84 |
| 2026-05-14 12:00 |
16:59:29.01 |
-36:38:21.6 |
HIP 83041 |
16.22 |
| 2026-05-15 00:00 |
16:59:20.83 |
-36:38:16.6 |
HIP 83041 |
14.58 |
| 2026-05-15 12:00 |
16:59:12.63 |
-36:38:11.3 |
HIP 83041 |
12.95 |
| 2026-05-16 00:00 |
16:59:04.39 |
-36:38:05.8 |
HIP 83041 |
11.31 |
| 2026-05-16 12:00 |
16:58:56.12 |
-36:37:59.9 |
HIP 83041 |
9.67 |
| 2026-05-17 00:00 |
16:58:47.82 |
-36:37:53.7 |
HIP 83041 |
8.03 |
| 2026-05-17 12:00 |
16:58:39.49 |
-36:37:47.2 |
HIP 83041 |
6.41 |
| 2026-05-18 00:00 |
16:58:31.13 |
-36:37:40.4 |
HIP 83041 |
4.82 |
| 2026-05-18 12:00 |
16:58:22.75 |
-36:37:33.3 |
HIP 83041 |
3.32 |
| 2026-05-19 00:00 |
16:58:14.34 |
-36:37:25.9 |
HIP 83041 |
2.12 |
| 2026-05-19 12:00 |
16:58:05.90 |
-36:37:18.2 |
HIP 83041 |
1.92 |
| 2026-05-20 00:00 |
16:57:57.44 |
-36:37:10.2 |
HIP 83041 |
2.95 |
| 2026-05-20 12:00 |
16:57:48.96 |
-36:37:01.9 |
HIP 83041 |
4.42 |
| 2026-05-21 00:00 |
16:57:40.45 |
-36:36:53.3 |
HIP 83041 |
6.02 |
| 2026-05-21 12:00 |
16:57:31.93 |
-36:36:44.3 |
HIP 83041 |
7.68 |
| 2026-05-22 00:00 |
16:57:23.38 |
-36:36:35.1 |
HIP 83041 |
9.37 |
| 2026-05-22 12:00 |
16:57:14.81 |
-36:36:25.6 |
HIP 83041 |
11.07 |
| 2026-05-23 00:00 |
16:57:06.22 |
-36:36:15.8 |
HIP 83041 |
12.78 |
| 2026-05-23 12:00 |
16:56:57.61 |
-36:36:05.7 |
HIP 83041 |
14.50 |
| 2026-05-24 00:00 |
16:56:48.99 |
-36:35:55.3 |
HIP 83041 |
16.23 |
| 2026-05-24 12:00 |
16:56:40.35 |
-36:35:44.6 |
HIP 83041 |
17.97 |
| 2026-05-25 00:00 |
16:56:31.70 |
-36:35:33.6 |
HIP 83041 |
19.71 |
| 2026-05-25 12:00 |
16:56:23.02 |
-36:35:22.3 |
HIP 83041 |
21.45 |
| 2026-05-26 00:00 |
16:56:14.34 |
-36:35:10.7 |
HIP 83041 |
23.20 |
| 2026-05-26 12:00 |
16:56:05.64 |
-36:34:58.8 |
HIP 82747 |
24.45 |
| 2026-05-27 00:00 |
16:55:56.93 |
-36:34:46.6 |
HIP 82747 |
23.49 |
| 2026-05-27 12:00 |
16:55:48.21 |
-36:34:34.1 |
HIP 82747 |
22.63 |
| 2026-05-28 00:00 |
16:55:39.47 |
-36:34:21.3 |
HIP 82747 |
21.88 |
| 2026-05-28 12:00 |
16:55:30.73 |
-36:34:08.2 |
HIP 82747 |
21.26 |
| 2026-05-29 00:00 |
16:55:21.98 |
-36:33:54.8 |
HIP 82747 |
20.77 |
| 2026-05-29 12:00 |
16:55:13.22 |
-36:33:41.2 |
HIP 82747 |
20.43 |
| 2026-05-30 00:00 |
16:55:04.45 |
-36:33:27.2 |
HIP 82747 |
20.24 |
| 2026-05-30 12:00 |
16:54:55.67 |
-36:33:13.0 |
HIP 82623 |
19.11 |
| 2026-05-31 00:00 |
16:54:46.89 |
-36:32:58.4 |
HIP 82623 |
17.55 |
| 2026-05-31 12:00 |
16:54:38.11 |
-36:32:43.6 |
HIP 82623 |
16.03 |
| 2026-06-01 00:00 |
16:54:29.32 |
-36:32:28.5 |
HIP 82623 |
14.58 |
| 2026-06-01 12:00 |
16:54:20.52 |
-36:32:13.1 |
HIP 82623 |
13.21 |
| 2026-06-02 00:00 |
16:54:11.72 |
-36:31:57.4 |
HIP 82623 |
11.95 |