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) |
| 2026-07-29 00:00 |
08:27:32.69 |
+19:46:56.4 |
HIP 41440 |
32.38 |
| 2026-07-29 12:00 |
08:27:38.31 |
+19:46:21.9 |
HIP 41440 |
32.11 |
| 2026-07-30 00:00 |
08:27:43.93 |
+19:45:47.3 |
HIP 41440 |
31.91 |
| 2026-07-30 12:00 |
08:27:49.55 |
+19:45:12.8 |
HIP 41440 |
31.77 |
| 2026-07-31 00:00 |
08:27:55.16 |
+19:44:38.3 |
HIP 41440 |
31.70 |
| 2026-07-31 12:00 |
08:28:00.76 |
+19:44:03.8 |
HIP 41440 |
31.69 |
| 2026-08-01 00:00 |
08:28:06.36 |
+19:43:29.3 |
HIP 41440 |
31.75 |
| 2026-08-01 12:00 |
08:28:11.96 |
+19:42:54.8 |
HIP 41440 |
31.87 |
| 2026-08-02 00:00 |
08:28:17.55 |
+19:42:20.4 |
HIP 41440 |
32.06 |
| 2026-08-02 12:00 |
08:28:23.13 |
+19:41:45.9 |
HIP 41440 |
32.31 |
| 2026-08-03 00:00 |
08:28:28.70 |
+19:41:11.6 |
HIP 41440 |
32.62 |
| 2026-08-03 12:00 |
08:28:34.27 |
+19:40:37.2 |
HIP 41440 |
32.99 |
| 2026-08-04 00:00 |
08:28:39.83 |
+19:40:02.8 |
HIP 41440 |
33.41 |
| 2026-08-04 12:00 |
08:28:45.38 |
+19:39:28.5 |
HIP 41440 |
33.89 |
| 2026-08-05 00:00 |
08:28:50.92 |
+19:38:54.3 |
HIP 41440 |
34.42 |
| 2026-08-05 12:00 |
08:28:56.45 |
+19:38:20.0 |
HIP 41440 |
35.00 |
| 2026-08-06 00:00 |
08:29:01.97 |
+19:37:45.8 |
HIP 41440 |
35.62 |
| 2026-08-06 12:00 |
08:29:07.48 |
+19:37:11.6 |
HIP 41440 |
36.29 |
| 2026-08-07 00:00 |
08:29:12.98 |
+19:36:37.5 |
HIP 41824 |
36.49 |
| 2026-08-07 12:00 |
08:29:18.47 |
+19:36:03.3 |
HIP 41824 |
35.08 |
| 2026-08-08 00:00 |
08:29:23.95 |
+19:35:29.3 |
HIP 41824 |
33.67 |
| 2026-08-08 12:00 |
08:29:29.41 |
+19:34:55.2 |
HIP 41824 |
32.26 |
| 2026-08-09 00:00 |
08:29:34.87 |
+19:34:21.3 |
HIP 41824 |
30.86 |
| 2026-08-09 12:00 |
08:29:40.30 |
+19:33:47.3 |
HIP 41824 |
29.47 |
| 2026-08-10 00:00 |
08:29:45.73 |
+19:33:13.4 |
HIP 41824 |
28.07 |
| 2026-08-10 12:00 |
08:29:51.14 |
+19:32:39.6 |
HIP 41824 |
26.68 |
| 2026-08-11 00:00 |
08:29:56.54 |
+19:32:05.8 |
HIP 41824 |
25.29 |
| 2026-08-11 12:00 |
08:30:01.92 |
+19:31:32.0 |
HIP 41824 |
23.91 |
| 2026-08-12 00:00 |
08:30:07.28 |
+19:30:58.3 |
HIP 41824 |
22.53 |
| 2026-08-12 12:00 |
08:30:12.63 |
+19:30:24.7 |
HIP 41824 |
21.16 |
| 2026-08-13 00:00 |
08:30:17.97 |
+19:29:51.1 |
HIP 41824 |
19.79 |
| 2026-08-13 12:00 |
08:30:23.28 |
+19:29:17.5 |
HIP 41824 |
18.43 |
| 2026-08-14 00:00 |
08:30:28.58 |
+19:28:44.1 |
HIP 41824 |
17.07 |
| 2026-08-14 12:00 |
08:30:33.86 |
+19:28:10.6 |
HIP 41824 |
15.72 |
| 2026-08-15 00:00 |
08:30:39.12 |
+19:27:37.3 |
HIP 41824 |
14.37 |
| 2026-08-15 12:00 |
08:30:44.36 |
+19:27:04.0 |
HIP 41824 |
13.03 |
| 2026-08-16 00:00 |
08:30:49.58 |
+19:26:30.8 |
HIP 41824 |
11.70 |
| 2026-08-16 12:00 |
08:30:54.78 |
+19:25:57.6 |
HIP 41824 |
10.38 |
| 2026-08-17 00:00 |
08:30:59.96 |
+19:25:24.6 |
HIP 41824 |
9.07 |
| 2026-08-17 12:00 |
08:31:05.12 |
+19:24:51.5 |
HIP 41824 |
7.78 |
| 2026-08-18 00:00 |
08:31:10.26 |
+19:24:18.6 |
HIP 41824 |
6.51 |
| 2026-08-18 12:00 |
08:31:15.37 |
+19:23:45.7 |
HIP 41824 |
5.27 |
| 2026-08-19 00:00 |
08:31:20.47 |
+19:23:13.0 |
HIP 41824 |
4.09 |