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) |
| 2026-03-26 00:00 |
02:31:16.37 |
-30:51:53.8 |
HIP 11766 |
8.85 |
| 2026-03-26 12:00 |
02:31:24.83 |
-30:50:49.4 |
HIP 11766 |
8.11 |
| 2026-03-27 00:00 |
02:31:33.36 |
-30:49:46.0 |
HIP 11766 |
7.86 |
| 2026-03-27 12:00 |
02:31:41.96 |
-30:48:43.6 |
HIP 11766 |
8.15 |
| 2026-03-28 00:00 |
02:31:50.64 |
-30:47:42.3 |
HIP 11766 |
8.93 |
| 2026-03-28 12:00 |
02:31:59.38 |
-30:46:41.9 |
HIP 11766 |
10.09 |
| 2026-03-29 00:00 |
02:32:08.19 |
-30:45:42.6 |
HIP 11766 |
11.51 |
| 2026-03-29 12:00 |
02:32:17.06 |
-30:44:44.2 |
HIP 11766 |
13.12 |
| 2026-03-30 00:00 |
02:32:26.00 |
-30:43:47.0 |
HIP 11766 |
14.86 |
| 2026-03-30 12:00 |
02:32:35.01 |
-30:42:50.7 |
HIP 11766 |
16.68 |
| 2026-03-31 00:00 |
02:32:44.08 |
-30:41:55.5 |
HIP 11766 |
18.57 |
| 2026-03-31 12:00 |
02:32:53.22 |
-30:41:01.3 |
HIP 11967 |
19.39 |
| 2026-04-01 00:00 |
02:33:02.41 |
-30:40:08.2 |
HIP 11967 |
17.48 |
| 2026-04-01 12:00 |
02:33:11.67 |
-30:39:16.1 |
HIP 11967 |
15.63 |
| 2026-04-02 00:00 |
02:33:20.99 |
-30:38:25.1 |
HIP 11967 |
13.85 |
| 2026-04-02 12:00 |
02:33:30.37 |
-30:37:35.1 |
HIP 11967 |
12.18 |
| 2026-04-03 00:00 |
02:33:39.80 |
-30:36:46.3 |
HIP 11967 |
10.67 |
| 2026-04-03 12:00 |
02:33:49.30 |
-30:35:58.4 |
HIP 11967 |
9.42 |
| 2026-04-04 00:00 |
02:33:58.85 |
-30:35:11.7 |
HIP 11967 |
8.53 |
| 2026-04-04 12:00 |
02:34:08.46 |
-30:34:26.0 |
HIP 11967 |
8.12 |
| 2026-04-05 00:00 |
02:34:18.12 |
-30:33:41.5 |
HIP 11967 |
8.29 |
| 2026-04-05 12:00 |
02:34:27.84 |
-30:32:58.0 |
HIP 11967 |
8.99 |
| 2026-04-06 00:00 |
02:34:37.60 |
-30:32:15.6 |
HIP 11967 |
10.12 |
| 2026-04-06 12:00 |
02:34:47.43 |
-30:31:34.3 |
HIP 11967 |
11.56 |
| 2026-04-07 00:00 |
02:34:57.30 |
-30:30:54.1 |
HIP 11967 |
13.21 |
| 2026-04-07 12:00 |
02:35:07.22 |
-30:30:15.1 |
HIP 11967 |
15.00 |
| 2026-04-08 00:00 |
02:35:17.20 |
-30:29:37.1 |
HIP 11967 |
16.89 |
| 2026-04-08 12:00 |
02:35:27.22 |
-30:29:00.3 |
HIP 11967 |
18.86 |
| 2026-04-09 00:00 |
02:35:37.29 |
-30:28:24.6 |
HIP 11967 |
20.87 |
| 2026-04-09 12:00 |
02:35:47.41 |
-30:27:50.1 |
HIP 11967 |
22.92 |
| 2026-04-10 00:00 |
02:35:57.57 |
-30:27:16.7 |
HIP 12122 |
24.71 |
| 2026-04-10 12:00 |
02:36:07.78 |
-30:26:44.4 |
HIP 12122 |
24.04 |
| 2026-04-11 00:00 |
02:36:18.03 |
-30:26:13.3 |
HIP 12122 |
23.60 |
| 2026-04-11 12:00 |
02:36:28.33 |
-30:25:43.3 |
HIP 12122 |
23.39 |
| 2026-04-12 00:00 |
02:36:38.67 |
-30:25:14.5 |
HIP 12122 |
23.42 |
| 2026-04-12 12:00 |
02:36:49.05 |
-30:24:46.9 |
HIP 12288 |
23.38 |
| 2026-04-13 00:00 |
02:36:59.47 |
-30:24:20.4 |
HIP 12288 |
21.29 |
| 2026-04-13 12:00 |
02:37:09.93 |
-30:23:55.1 |
HIP 12288 |
19.25 |
| 2026-04-14 00:00 |
02:37:20.43 |
-30:23:31.0 |
HIP 12288 |
17.29 |
| 2026-04-14 12:00 |
02:37:30.96 |
-30:23:08.1 |
HIP 12288 |
15.43 |
| 2026-04-15 00:00 |
02:37:41.54 |
-30:22:46.4 |
HIP 12288 |
13.72 |
| 2026-04-15 12:00 |
02:37:52.15 |
-30:22:25.9 |
HIP 12288 |
12.22 |
| 2026-04-16 00:00 |
02:38:02.79 |
-30:22:06.6 |
HIP 12288 |
11.02 |