メタデータ
| 項目 |
値 |
| Designation |
C/2020 H11 (PANSTARRS-Lemmon) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2020-09-15T11:27:22.633920Z |
| Orbit solution date (soln_date, UTC) |
2023-04-28T15:42:08Z |
| Obs used |
53 |
| NEO |
- |
| M1 |
7.400 |
| K1 |
11.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2020-04-21T13:41:56.256000Z |
| Discovery magnitude (MPC) |
22.10 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) |
2020-03-26.0000000 |
| e |
0.99927122 |
| q (au) |
7.631184 |
| a (au) |
10471.148612 |
| i (deg) |
151.414831 |
| Ω (om, deg) |
303.005797 |
| ω (w, deg) |
91.488781 |
| M (ma, deg) |
359.999840 |
等級
散乱 + 全体線形
$$
M_a = (9.276 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
9.276 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.857 |
| 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 |
08:18:20.61 |
+20:49:23.2 |
HIP 40807 |
20.22 |
| 2026-06-01 12:00 |
08:18:23.47 |
+20:48:55.9 |
HIP 40807 |
19.72 |
| 2026-06-02 00:00 |
08:18:26.38 |
+20:48:28.6 |
HIP 40807 |
19.22 |
| 2026-06-02 12:00 |
08:18:29.34 |
+20:48:01.1 |
HIP 40807 |
18.75 |
| 2026-06-03 00:00 |
08:18:32.35 |
+20:47:33.5 |
HIP 40807 |
18.28 |
| 2026-06-03 12:00 |
08:18:35.41 |
+20:47:05.7 |
HIP 40807 |
17.83 |
| 2026-06-04 00:00 |
08:18:38.52 |
+20:46:37.8 |
HIP 40807 |
17.41 |
| 2026-06-04 12:00 |
08:18:41.67 |
+20:46:09.8 |
HIP 40807 |
17.01 |
| 2026-06-05 00:00 |
08:18:44.88 |
+20:45:41.7 |
HIP 40807 |
16.64 |
| 2026-06-05 12:00 |
08:18:48.13 |
+20:45:13.4 |
HIP 40807 |
16.30 |
| 2026-06-06 00:00 |
08:18:51.43 |
+20:44:45.1 |
HIP 40807 |
15.99 |
| 2026-06-06 12:00 |
08:18:54.77 |
+20:44:16.5 |
HIP 40807 |
15.73 |
| 2026-06-07 00:00 |
08:18:58.16 |
+20:43:47.9 |
HIP 40807 |
15.50 |
| 2026-06-07 12:00 |
08:19:01.60 |
+20:43:19.2 |
HIP 40807 |
15.33 |
| 2026-06-08 00:00 |
08:19:05.08 |
+20:42:50.3 |
HIP 40807 |
15.21 |
| 2026-06-08 12:00 |
08:19:08.61 |
+20:42:21.3 |
HIP 40807 |
15.14 |
| 2026-06-09 00:00 |
08:19:12.18 |
+20:41:52.2 |
HIP 40807 |
15.12 |
| 2026-06-09 12:00 |
08:19:15.80 |
+20:41:23.0 |
HIP 40807 |
15.17 |
| 2026-06-10 00:00 |
08:19:19.46 |
+20:40:53.6 |
HIP 40866 |
14.92 |
| 2026-06-10 12:00 |
08:19:23.16 |
+20:40:24.2 |
HIP 40866 |
14.23 |
| 2026-06-11 00:00 |
08:19:26.91 |
+20:39:54.6 |
HIP 40866 |
13.57 |
| 2026-06-11 12:00 |
08:19:30.69 |
+20:39:24.9 |
HIP 40866 |
12.95 |
| 2026-06-12 00:00 |
08:19:34.52 |
+20:38:55.1 |
HIP 40866 |
12.38 |
| 2026-06-12 12:00 |
08:19:38.39 |
+20:38:25.2 |
HIP 40866 |
11.86 |
| 2026-06-13 00:00 |
08:19:42.31 |
+20:37:55.2 |
HIP 40866 |
11.40 |
| 2026-06-13 12:00 |
08:19:46.26 |
+20:37:25.0 |
HIP 40866 |
11.01 |
| 2026-06-14 00:00 |
08:19:50.25 |
+20:36:54.8 |
HIP 40866 |
10.71 |
| 2026-06-14 12:00 |
08:19:54.28 |
+20:36:24.4 |
HIP 40866 |
10.51 |
| 2026-06-15 00:00 |
08:19:58.36 |
+20:35:54.0 |
HIP 40866 |
10.41 |
| 2026-06-15 12:00 |
08:20:02.47 |
+20:35:23.4 |
HIP 40866 |
10.42 |
| 2026-06-16 00:00 |
08:20:06.61 |
+20:34:52.8 |
HIP 40866 |
10.54 |
| 2026-06-16 12:00 |
08:20:10.80 |
+20:34:22.0 |
HIP 40866 |
10.77 |
| 2026-06-17 00:00 |
08:20:15.02 |
+20:33:51.2 |
HIP 40866 |
11.10 |
| 2026-06-17 12:00 |
08:20:19.28 |
+20:33:20.2 |
HIP 40866 |
11.54 |
| 2026-06-18 00:00 |
08:20:23.57 |
+20:32:49.2 |
HIP 40866 |
12.07 |
| 2026-06-18 12:00 |
08:20:27.90 |
+20:32:18.0 |
HIP 40866 |
12.67 |
| 2026-06-19 00:00 |
08:20:32.27 |
+20:31:46.8 |
HIP 40866 |
13.36 |
| 2026-06-19 12:00 |
08:20:36.67 |
+20:31:15.5 |
HIP 40866 |
14.10 |
| 2026-06-20 00:00 |
08:20:41.10 |
+20:30:44.0 |
HIP 40866 |
14.90 |
| 2026-06-20 12:00 |
08:20:45.57 |
+20:30:12.5 |
HIP 40866 |
15.75 |
| 2026-06-21 00:00 |
08:20:50.07 |
+20:29:40.9 |
HIP 40866 |
16.65 |
| 2026-06-21 12:00 |
08:20:54.60 |
+20:29:09.2 |
HIP 40866 |
17.58 |
| 2026-06-22 00:00 |
08:20:59.16 |
+20:28:37.5 |
HIP 40866 |
18.55 |