メタデータ
| 項目 |
値 |
| Designation |
C/2024 U1 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2024-06-30T16:18:58.452480Z |
| Orbit solution date (soln_date, UTC) |
2025-09-23T14:42:08Z |
| Obs used |
119 |
| NEO |
- |
| M1 |
14.300 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-10-30T13:14:09.859200Z |
| Discovery magnitude (MPC) |
20.81 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) |
2024-10-01.0000000 |
| e |
0.99368257 |
| q (au) |
4.835875 |
| a (au) |
765.481304 |
| i (deg) |
128.723018 |
| Ω (om, deg) |
270.243999 |
| ω (w, deg) |
188.077278 |
| M (ma, deg) |
0.004296 |
等級
散乱 + 全体線形
$$
M_a = (12.937 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
12.937 |
| n |
2.000 |
| gf |
0.985 |
| gb |
-0.501 |
| k |
1.000 |
| δ90 |
9.999 |
| 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) |
| 2026-05-12 00:00 |
02:47:40.95 |
-30:34:46.1 |
HIP 12914 |
21.35 |
| 2026-05-12 12:00 |
02:47:52.13 |
-30:35:36.3 |
HIP 12914 |
23.86 |
| 2026-05-13 00:00 |
02:48:03.30 |
-30:36:27.8 |
HIP 13174 |
21.56 |
| 2026-05-13 12:00 |
02:48:14.46 |
-30:37:20.8 |
HIP 13174 |
19.10 |
| 2026-05-14 00:00 |
02:48:25.60 |
-30:38:15.1 |
HIP 13174 |
16.66 |
| 2026-05-14 12:00 |
02:48:36.72 |
-30:39:10.9 |
HIP 13174 |
14.24 |
| 2026-05-15 00:00 |
02:48:47.83 |
-30:40:08.1 |
HIP 13174 |
11.87 |
| 2026-05-15 12:00 |
02:48:58.92 |
-30:41:06.7 |
HIP 13174 |
9.58 |
| 2026-05-16 00:00 |
02:49:09.99 |
-30:42:06.7 |
HIP 13174 |
7.47 |
| 2026-05-16 12:00 |
02:49:21.05 |
-30:43:08.2 |
HIP 13174 |
5.73 |
| 2026-05-17 00:00 |
02:49:32.08 |
-30:44:11.1 |
HIP 13174 |
4.79 |
| 2026-05-17 12:00 |
02:49:43.09 |
-30:45:15.5 |
HIP 13174 |
5.14 |
| 2026-05-18 00:00 |
02:49:54.07 |
-30:46:21.3 |
HIP 13174 |
6.57 |
| 2026-05-18 12:00 |
02:50:05.04 |
-30:47:28.5 |
HIP 13174 |
8.56 |
| 2026-05-19 00:00 |
02:50:15.98 |
-30:48:37.1 |
HIP 13194 |
9.30 |
| 2026-05-19 12:00 |
02:50:26.89 |
-30:49:47.3 |
HIP 13194 |
10.43 |
| 2026-05-20 00:00 |
02:50:37.78 |
-30:50:58.8 |
HIP 13194 |
12.02 |
| 2026-05-20 12:00 |
02:50:48.64 |
-30:52:11.8 |
HIP 13194 |
13.92 |
| 2026-05-21 00:00 |
02:50:59.47 |
-30:53:26.3 |
HIP 13363 |
12.99 |
| 2026-05-21 12:00 |
02:51:10.27 |
-30:54:42.2 |
HIP 13363 |
11.44 |
| 2026-05-22 00:00 |
02:51:21.04 |
-30:55:59.5 |
HIP 13363 |
10.36 |
| 2026-05-22 12:00 |
02:51:31.78 |
-30:57:18.3 |
HIP 13363 |
9.91 |
| 2026-05-23 00:00 |
02:51:42.49 |
-30:58:38.6 |
HIP 13363 |
10.19 |
| 2026-05-23 12:00 |
02:51:53.17 |
-31:00:00.3 |
HIP 13363 |
11.14 |
| 2026-05-24 00:00 |
02:52:03.81 |
-31:01:23.5 |
HIP 13363 |
12.61 |
| 2026-05-24 12:00 |
02:52:14.42 |
-31:02:48.1 |
HIP 13363 |
14.45 |
| 2026-05-25 00:00 |
02:52:24.99 |
-31:04:14.1 |
HIP 13363 |
16.55 |
| 2026-05-25 12:00 |
02:52:35.53 |
-31:05:41.7 |
HIP 13363 |
18.81 |
| 2026-05-26 00:00 |
02:52:46.02 |
-31:07:10.7 |
HIP 13441 |
17.48 |
| 2026-05-26 12:00 |
02:52:56.49 |
-31:08:41.1 |
HIP 13441 |
15.63 |
| 2026-05-27 00:00 |
02:53:06.91 |
-31:10:13.0 |
HIP 13441 |
14.03 |
| 2026-05-27 12:00 |
02:53:17.29 |
-31:11:46.4 |
HIP 13441 |
12.78 |
| 2026-05-28 00:00 |
02:53:27.63 |
-31:13:21.2 |
HIP 13441 |
12.00 |
| 2026-05-28 12:00 |
02:53:37.94 |
-31:14:57.5 |
HIP 13441 |
11.78 |
| 2026-05-29 00:00 |
02:53:48.19 |
-31:16:35.2 |
HIP 13441 |
12.16 |
| 2026-05-29 12:00 |
02:53:58.41 |
-31:18:14.4 |
HIP 13441 |
13.09 |
| 2026-05-30 00:00 |
02:54:08.58 |
-31:19:55.1 |
HIP 13441 |
14.47 |
| 2026-05-30 12:00 |
02:54:18.71 |
-31:21:37.2 |
HIP 13441 |
16.18 |
| 2026-05-31 00:00 |
02:54:28.80 |
-31:23:20.9 |
HIP 13441 |
18.14 |
| 2026-05-31 12:00 |
02:54:38.83 |
-31:25:05.9 |
HIP 13441 |
20.28 |
| 2026-06-01 00:00 |
02:54:48.82 |
-31:26:52.5 |
HIP 13688 |
21.83 |
| 2026-06-01 12:00 |
02:54:58.76 |
-31:28:40.5 |
HIP 13688 |
21.01 |
| 2026-06-02 00:00 |
02:55:08.66 |
-31:30:30.0 |
HIP 13688 |
20.56 |