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
$$
M_a = (12.950 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
12.950 |
| n |
2.000 |
| gf |
0.946 |
| gb |
-0.984 |
| k |
1.000 |
| δ90 |
9.106 |
| 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) |
| 2026-07-29 00:00 |
03:04:28.49 |
-37:33:54.7 |
HIP 14381 |
13.26 |
| 2026-07-29 12:00 |
03:04:26.12 |
-37:38:17.0 |
HIP 14381 |
13.13 |
| 2026-07-30 00:00 |
03:04:23.59 |
-37:42:40.2 |
HIP 14381 |
14.44 |
| 2026-07-30 12:00 |
03:04:20.89 |
-37:47:04.2 |
HIP 14381 |
16.87 |
| 2026-07-31 00:00 |
03:04:18.02 |
-37:51:29.1 |
HIP 14381 |
20.04 |
| 2026-07-31 12:00 |
03:04:14.98 |
-37:55:54.8 |
HIP 14381 |
23.66 |
| 2026-08-01 00:00 |
03:04:11.77 |
-38:00:21.4 |
HIP 14162 |
23.63 |
| 2026-08-01 12:00 |
03:04:08.39 |
-38:04:48.8 |
HIP 14162 |
20.68 |
| 2026-08-02 00:00 |
03:04:04.83 |
-38:09:17.0 |
HIP 14162 |
18.33 |
| 2026-08-02 12:00 |
03:04:01.10 |
-38:13:46.0 |
HIP 14162 |
16.85 |
| 2026-08-03 00:00 |
03:03:57.20 |
-38:18:15.7 |
HIP 14162 |
16.50 |
| 2026-08-03 12:00 |
03:03:53.12 |
-38:22:46.2 |
HIP 14162 |
17.37 |
| 2026-08-04 00:00 |
03:03:48.87 |
-38:27:17.5 |
HIP 14162 |
19.29 |
| 2026-08-04 12:00 |
03:03:44.43 |
-38:31:49.5 |
HIP 14162 |
22.01 |
| 2026-08-05 00:00 |
03:03:39.82 |
-38:36:22.2 |
HIP 14162 |
25.28 |
| 2026-08-05 12:00 |
03:03:35.03 |
-38:40:55.6 |
HIP 14400 |
28.20 |
| 2026-08-06 00:00 |
03:03:30.06 |
-38:45:29.7 |
HIP 14280 |
25.63 |
| 2026-08-06 12:00 |
03:03:24.90 |
-38:50:04.5 |
HIP 14280 |
21.57 |
| 2026-08-07 00:00 |
03:03:19.56 |
-38:54:39.9 |
HIP 14280 |
17.83 |
| 2026-08-07 12:00 |
03:03:14.04 |
-38:59:15.9 |
HIP 14280 |
14.68 |
| 2026-08-08 00:00 |
03:03:08.33 |
-39:03:52.6 |
HIP 14280 |
12.57 |
| 2026-08-08 12:00 |
03:03:02.44 |
-39:08:29.8 |
HIP 14280 |
12.10 |
| 2026-08-09 00:00 |
03:02:56.36 |
-39:13:07.7 |
HIP 14280 |
13.45 |
| 2026-08-09 12:00 |
03:02:50.09 |
-39:17:46.1 |
HIP 14280 |
16.19 |
| 2026-08-10 00:00 |
03:02:43.63 |
-39:22:25.0 |
HIP 14280 |
19.77 |
| 2026-08-10 12:00 |
03:02:36.98 |
-39:27:04.5 |
HIP 14280 |
23.82 |
| 2026-08-11 00:00 |
03:02:30.14 |
-39:31:44.5 |
HIP 14280 |
28.15 |
| 2026-08-11 12:00 |
03:02:23.11 |
-39:36:24.9 |
HIP 14280 |
32.65 |
| 2026-08-12 00:00 |
03:02:15.88 |
-39:41:05.9 |
HIP 14271 |
32.19 |
| 2026-08-12 12:00 |
03:02:08.47 |
-39:45:47.2 |
HIP 14158 |
29.30 |
| 2026-08-13 00:00 |
03:02:00.85 |
-39:50:29.0 |
HIP 14158 |
25.01 |
| 2026-08-13 12:00 |
03:01:53.04 |
-39:55:11.2 |
HIP 14158 |
21.01 |
| 2026-08-14 00:00 |
03:01:45.04 |
-39:59:53.8 |
HIP 14158 |
17.49 |
| 2026-08-14 12:00 |
03:01:36.83 |
-40:04:36.7 |
HIP 14158 |
14.85 |
| 2026-08-15 00:00 |
03:01:28.43 |
-40:09:20.0 |
HIP 14158 |
13.60 |
| 2026-08-15 12:00 |
03:01:19.83 |
-40:14:03.6 |
HIP 14158 |
14.15 |
| 2026-08-16 00:00 |
03:01:11.04 |
-40:18:47.5 |
HIP 14158 |
16.34 |
| 2026-08-16 12:00 |
03:01:02.04 |
-40:23:31.6 |
HIP 14158 |
19.62 |
| 2026-08-17 00:00 |
03:00:52.84 |
-40:28:16.0 |
HIP 14158 |
23.57 |
| 2026-08-17 12:00 |
03:00:43.44 |
-40:33:00.7 |
HIP 13908 |
20.86 |
| 2026-08-18 00:00 |
03:00:33.84 |
-40:37:45.5 |
HIP 13908 |
17.20 |
| 2026-08-18 12:00 |
03:00:24.04 |
-40:42:30.5 |
HIP 13908 |
14.41 |
| 2026-08-19 00:00 |
03:00:14.04 |
-40:47:15.7 |
HIP 13908 |
13.07 |