メタデータ
| 項目 |
値 |
| Designation |
443P/PANSTARRS-Christensen |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2022-10-09T17:10:55.254720Z |
| Orbit solution date (soln_date, UTC) |
2024-10-05T23:12:49Z |
| Obs used |
211 |
| NEO |
- |
| M1 |
9.200 |
| K1 |
17.750 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2005-07-05T04:57:05.184000Z |
| Discovery magnitude (MPC) |
21.40 V |
| Discovery observatory (MPC) |
G96 · Mt. Lemmon Survey |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2021-03-07.0000000 |
| e |
0.28450671 |
| q (au) |
2.956436 |
| a (au) |
4.132025 |
| i (deg) |
19.886402 |
| Ω (om, deg) |
108.960336 |
| ω (w, deg) |
145.019106 |
| M (ma, deg) |
291.739315 |
等級
散乱 + 全体線形
$$
M_a = (9.776 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
9.776 |
| n |
6.000 |
| gf |
0.952 |
| gb |
-0.835 |
| k |
0.999 |
| δ90 |
8.351 |
| 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 |
03:58:06.00 |
+07:30:06.8 |
HIP 18555 |
6.63 |
| 2026-05-12 12:00 |
03:58:30.90 |
+07:31:58.1 |
HIP 18555 |
5.80 |
| 2026-05-13 00:00 |
03:58:55.82 |
+07:33:48.8 |
HIP 18555 |
10.31 |
| 2026-05-13 12:00 |
03:59:20.75 |
+07:35:38.9 |
HIP 18555 |
16.20 |
| 2026-05-14 00:00 |
03:59:45.71 |
+07:37:28.5 |
HIP 18555 |
22.40 |
| 2026-05-14 12:00 |
04:00:10.69 |
+07:39:17.4 |
HIP 18749 |
16.65 |
| 2026-05-15 00:00 |
04:00:35.68 |
+07:41:05.8 |
HIP 18749 |
11.41 |
| 2026-05-15 12:00 |
04:01:00.69 |
+07:42:53.5 |
HIP 18749 |
8.14 |
| 2026-05-16 00:00 |
04:01:25.72 |
+07:44:40.7 |
HIP 18749 |
9.27 |
| 2026-05-16 12:00 |
04:01:50.76 |
+07:46:27.2 |
HIP 18810 |
10.16 |
| 2026-05-17 00:00 |
04:02:15.81 |
+07:48:13.2 |
HIP 18810 |
13.51 |
| 2026-05-17 12:00 |
04:02:40.89 |
+07:49:58.5 |
HIP 18810 |
18.58 |
| 2026-05-18 00:00 |
04:03:05.97 |
+07:51:43.3 |
HIP 18887 |
16.80 |
| 2026-05-18 12:00 |
04:03:31.07 |
+07:53:27.4 |
HIP 18887 |
17.05 |
| 2026-05-19 00:00 |
04:03:56.18 |
+07:55:10.9 |
HIP 18975 |
16.65 |
| 2026-05-19 12:00 |
04:04:21.30 |
+07:56:53.8 |
HIP 18975 |
16.15 |
| 2026-05-20 00:00 |
04:04:46.43 |
+07:58:36.1 |
HIP 18975 |
18.10 |
| 2026-05-20 12:00 |
04:05:11.57 |
+08:00:17.7 |
HIP 19104 |
19.06 |
| 2026-05-21 00:00 |
04:05:36.72 |
+08:01:58.8 |
HIP 19104 |
19.22 |
| 2026-05-21 12:00 |
04:06:01.88 |
+08:03:39.2 |
HIP 19200 |
15.21 |
| 2026-05-22 00:00 |
04:06:27.04 |
+08:05:19.1 |
HIP 19200 |
9.19 |
| 2026-05-22 12:00 |
04:06:52.21 |
+08:06:58.3 |
HIP 19200 |
4.57 |
| 2026-05-23 00:00 |
04:07:17.39 |
+08:08:36.8 |
HIP 19200 |
6.36 |
| 2026-05-23 12:00 |
04:07:42.57 |
+08:10:14.8 |
HIP 19200 |
11.96 |
| 2026-05-24 00:00 |
04:08:07.76 |
+08:11:52.1 |
HIP 19313 |
8.83 |
| 2026-05-24 12:00 |
04:08:32.95 |
+08:13:28.8 |
HIP 19313 |
6.78 |
| 2026-05-25 00:00 |
04:08:58.15 |
+08:15:04.9 |
HIP 19313 |
9.85 |
| 2026-05-25 12:00 |
04:09:23.35 |
+08:16:40.4 |
HIP 19313 |
15.19 |
| 2026-05-26 00:00 |
04:09:48.55 |
+08:18:15.2 |
HIP 19478 |
10.21 |
| 2026-05-26 12:00 |
04:10:13.75 |
+08:19:49.4 |
HIP 19478 |
5.29 |
| 2026-05-27 00:00 |
04:10:38.96 |
+08:21:23.0 |
HIP 19478 |
5.87 |
| 2026-05-27 12:00 |
04:11:04.16 |
+08:22:56.0 |
HIP 19532 |
9.44 |
| 2026-05-28 00:00 |
04:11:29.37 |
+08:24:28.3 |
HIP 19532 |
10.01 |
| 2026-05-28 12:00 |
04:11:54.57 |
+08:26:00.0 |
HIP 19532 |
13.91 |
| 2026-05-29 00:00 |
04:12:19.77 |
+08:27:31.1 |
HIP 19532 |
19.22 |
| 2026-05-29 12:00 |
04:12:44.98 |
+08:29:01.6 |
HIP 19532 |
25.05 |
| 2026-05-30 00:00 |
04:13:10.18 |
+08:30:31.4 |
HIP 19718 |
23.48 |
| 2026-05-30 12:00 |
04:13:35.37 |
+08:32:00.6 |
HIP 19718 |
21.44 |
| 2026-05-31 00:00 |
04:14:00.57 |
+08:33:29.1 |
HIP 19850 |
20.82 |
| 2026-05-31 12:00 |
04:14:25.76 |
+08:34:57.0 |
HIP 19850 |
16.01 |
| 2026-06-01 00:00 |
04:14:50.94 |
+08:36:24.3 |
HIP 19850 |
12.68 |
| 2026-06-01 12:00 |
04:15:16.12 |
+08:37:51.0 |
HIP 19850 |
12.11 |
| 2026-06-02 00:00 |
04:15:41.30 |
+08:39:17.0 |
HIP 19912 |
10.03 |