メタデータ
| 項目 |
値 |
| Designation |
448P/PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2022-09-08T00:31:25.878720Z |
| Orbit solution date (soln_date, UTC) |
2024-08-11T00:12:25Z |
| Obs used |
184 |
| NEO |
- |
| M1 |
18.000 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2008-10-01T09:02:51.072000Z |
| Discovery magnitude (MPC) |
20.00 V |
| Discovery observatory (MPC) |
703 · University of Arizona Catalina Sky Survey |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2019-04-24.0000000 |
| e |
0.41897178 |
| q (au) |
2.109134 |
| a (au) |
3.630003 |
| i (deg) |
12.152893 |
| Ω (om, deg) |
161.780755 |
| ω (w, deg) |
219.028807 |
| M (ma, deg) |
184.282775 |
等級
散乱 + 全体線形
$$
M_a = (19.465 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
19.465 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.629 |
| 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
ファインディングチャート
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
13:54:08.04 |
-02:54:31.5 |
HIP 67894 |
6.54 |
| 2026-09-20 12:00 |
13:54:30.41 |
-02:56:45.1 |
HIP 67894 |
4.34 |
| 2026-09-21 00:00 |
13:54:52.85 |
-02:58:58.7 |
HIP 67894 |
8.21 |
| 2026-09-21 12:00 |
13:55:15.34 |
-03:01:12.3 |
HIP 67894 |
13.75 |
| 2026-09-22 00:00 |
13:55:37.90 |
-03:03:25.8 |
HIP 67894 |
19.60 |
| 2026-09-22 12:00 |
13:56:00.52 |
-03:05:39.3 |
HIP 68121 |
13.71 |
| 2026-09-23 00:00 |
13:56:23.20 |
-03:07:52.8 |
HIP 68121 |
7.87 |
| 2026-09-23 12:00 |
13:56:45.94 |
-03:10:06.2 |
HIP 68121 |
3.15 |
| 2026-09-24 00:00 |
13:57:08.73 |
-03:12:19.5 |
HIP 68121 |
5.69 |
| 2026-09-24 12:00 |
13:57:31.59 |
-03:14:32.8 |
HIP 68121 |
11.39 |
| 2026-09-25 00:00 |
13:57:54.51 |
-03:16:46.0 |
HIP 68121 |
17.39 |
| 2026-09-25 12:00 |
13:58:17.48 |
-03:18:59.2 |
HIP 68121 |
23.48 |
| 2026-09-26 00:00 |
13:58:40.52 |
-03:21:12.3 |
HIP 68380 |
20.81 |
| 2026-09-26 12:00 |
13:59:03.61 |
-03:23:25.3 |
HIP 68380 |
14.88 |
| 2026-09-27 00:00 |
13:59:26.75 |
-03:25:38.2 |
HIP 68380 |
9.25 |
| 2026-09-27 12:00 |
13:59:49.95 |
-03:27:51.1 |
HIP 68380 |
5.13 |
| 2026-09-28 00:00 |
14:00:13.21 |
-03:30:03.8 |
HIP 68380 |
6.64 |
| 2026-09-28 12:00 |
14:00:36.52 |
-03:32:16.5 |
HIP 68380 |
11.80 |
| 2026-09-29 00:00 |
14:00:59.88 |
-03:34:29.1 |
HIP 68380 |
17.68 |
| 2026-09-29 12:00 |
14:01:23.30 |
-03:36:41.5 |
HIP 68380 |
23.75 |
| 2026-09-30 00:00 |
14:01:46.78 |
-03:38:53.9 |
HIP 68380 |
29.90 |
| 2026-09-30 12:00 |
14:02:10.30 |
-03:41:06.1 |
HIP 68716 |
33.26 |
| 2026-10-01 00:00 |
14:02:33.88 |
-03:43:18.3 |
HIP 68716 |
27.17 |
| 2026-10-01 12:00 |
14:02:57.51 |
-03:45:30.3 |
HIP 68716 |
21.19 |
| 2026-10-02 00:00 |
14:03:21.19 |
-03:47:42.2 |
HIP 68716 |
15.44 |
| 2026-10-02 12:00 |
14:03:44.93 |
-03:49:53.9 |
HIP 68716 |
10.35 |
| 2026-10-03 00:00 |
14:04:08.71 |
-03:52:05.6 |
HIP 68716 |
7.46 |
| 2026-10-03 12:00 |
14:04:32.54 |
-03:54:17.1 |
HIP 68716 |
9.20 |
| 2026-10-04 00:00 |
14:04:56.43 |
-03:56:28.4 |
HIP 68716 |
13.93 |
| 2026-10-04 12:00 |
14:05:20.36 |
-03:58:39.6 |
HIP 68899 |
19.48 |
| 2026-10-05 00:00 |
14:05:44.34 |
-04:00:50.7 |
HIP 68899 |
13.43 |
| 2026-10-05 12:00 |
14:06:08.37 |
-04:03:01.6 |
HIP 68899 |
7.88 |
| 2026-10-06 00:00 |
14:06:32.44 |
-04:05:12.3 |
HIP 68899 |
5.04 |
| 2026-10-06 12:00 |
14:06:56.56 |
-04:07:22.9 |
HIP 68899 |
8.40 |
| 2026-10-07 00:00 |
14:07:20.73 |
-04:09:33.2 |
HIP 68899 |
14.06 |
| 2026-10-07 12:00 |
14:07:44.94 |
-04:11:43.5 |
HIP 68899 |
20.18 |
| 2026-10-08 00:00 |
14:08:09.20 |
-04:13:53.5 |
HIP 68899 |
26.46 |
| 2026-10-08 12:00 |
14:08:33.50 |
-04:16:03.3 |
HIP 69052 |
29.64 |
| 2026-10-09 00:00 |
14:08:57.85 |
-04:18:13.0 |
HIP 69052 |
29.80 |
| 2026-10-09 12:00 |
14:09:22.24 |
-04:20:22.4 |
HIP 69052 |
31.33 |
| 2026-10-10 00:00 |
14:09:46.67 |
-04:22:31.6 |
HIP 69052 |
34.04 |
| 2026-10-10 12:00 |
14:10:11.14 |
-04:24:40.7 |
HIP 69052 |
37.68 |
| 2026-10-11 00:00 |
14:10:35.65 |
-04:26:49.5 |
HIP 69052 |
42.02 |