メタデータ
| 項目 |
値 |
| Designation |
C/2024 F2 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2024-07-29T06:01:44.526720Z |
| Orbit solution date (soln_date, UTC) |
2025-09-09T12:42:32Z |
| Obs used |
209 |
| NEO |
- |
| M1 |
8.300 |
| K1 |
14.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-03-21T14:31:59.174400Z |
| Discovery magnitude (MPC) |
21.01 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) |
2024-08-01.0000000 |
| e |
0.60120680 |
| q (au) |
3.968210 |
| a (au) |
9.950547 |
| i (deg) |
13.740727 |
| Ω (om, deg) |
138.948584 |
| ω (w, deg) |
112.925955 |
| M (ma, deg) |
0.086313 |
等級
散乱 + 全体線形
$$
M_a = (7.448 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
7.448 |
| n |
6.000 |
| gf |
0.879 |
| gb |
-0.872 |
| k |
1.000 |
| δ90 |
6.783 |
| 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) |
| 2026-03-26 00:00 |
22:20:10.19 |
-12:10:15.5 |
HIP 110278 |
3.38 |
| 2026-03-26 12:00 |
22:20:33.74 |
-12:08:38.8 |
HIP 110278 |
6.31 |
| 2026-03-27 00:00 |
22:20:57.22 |
-12:07:02.6 |
HIP 110375 |
7.45 |
| 2026-03-27 12:00 |
22:21:20.62 |
-12:05:26.6 |
HIP 110375 |
5.73 |
| 2026-03-28 00:00 |
22:21:43.96 |
-12:03:51.0 |
HIP 110375 |
8.97 |
| 2026-03-28 12:00 |
22:22:07.22 |
-12:02:15.8 |
HIP 110375 |
14.06 |
| 2026-03-29 00:00 |
22:22:30.41 |
-12:00:40.9 |
HIP 110375 |
19.59 |
| 2026-03-29 12:00 |
22:22:53.52 |
-11:59:06.4 |
HIP 110375 |
25.27 |
| 2026-03-30 00:00 |
22:23:16.57 |
-11:57:32.3 |
HIP 110620 |
30.04 |
| 2026-03-30 12:00 |
22:23:39.54 |
-11:55:58.5 |
HIP 110620 |
25.41 |
| 2026-03-31 00:00 |
22:24:02.43 |
-11:54:25.1 |
HIP 110620 |
21.39 |
| 2026-03-31 12:00 |
22:24:25.25 |
-11:52:52.1 |
HIP 110688 |
16.18 |
| 2026-04-01 00:00 |
22:24:47.99 |
-11:51:19.5 |
HIP 110688 |
11.00 |
| 2026-04-01 12:00 |
22:25:10.66 |
-11:49:47.3 |
HIP 110688 |
6.85 |
| 2026-04-02 00:00 |
22:25:33.26 |
-11:48:15.5 |
HIP 110688 |
6.25 |
| 2026-04-02 12:00 |
22:25:55.77 |
-11:46:44.0 |
HIP 110688 |
9.83 |
| 2026-04-03 00:00 |
22:26:18.21 |
-11:45:13.0 |
HIP 110688 |
14.79 |
| 2026-04-03 12:00 |
22:26:40.57 |
-11:43:42.4 |
HIP 110688 |
20.13 |
| 2026-04-04 00:00 |
22:27:02.85 |
-11:42:12.3 |
HIP 110902 |
19.56 |
| 2026-04-04 12:00 |
22:27:25.06 |
-11:40:42.5 |
HIP 110902 |
16.55 |
| 2026-04-05 00:00 |
22:27:47.18 |
-11:39:13.2 |
HIP 110902 |
15.12 |
| 2026-04-05 12:00 |
22:28:09.23 |
-11:37:44.3 |
HIP 110902 |
15.68 |
| 2026-04-06 00:00 |
22:28:31.19 |
-11:36:15.8 |
HIP 110902 |
18.04 |
| 2026-04-06 12:00 |
22:28:53.08 |
-11:34:47.8 |
HIP 111044 |
15.17 |
| 2026-04-07 00:00 |
22:29:14.88 |
-11:33:20.2 |
HIP 111044 |
12.13 |
| 2026-04-07 12:00 |
22:29:36.60 |
-11:31:53.1 |
HIP 111044 |
11.19 |
| 2026-04-08 00:00 |
22:29:58.24 |
-11:30:26.5 |
HIP 111044 |
12.80 |
| 2026-04-08 12:00 |
22:30:19.80 |
-11:29:00.3 |
HIP 111044 |
16.19 |
| 2026-04-09 00:00 |
22:30:41.27 |
-11:27:34.6 |
HIP 111044 |
20.48 |
| 2026-04-09 12:00 |
22:31:02.66 |
-11:26:09.4 |
HIP 111044 |
25.21 |
| 2026-04-10 00:00 |
22:31:23.97 |
-11:24:44.6 |
HIP 111044 |
30.15 |
| 2026-04-10 12:00 |
22:31:45.18 |
-11:23:20.4 |
HIP 111261 |
28.76 |
| 2026-04-11 00:00 |
22:32:06.32 |
-11:21:56.6 |
HIP 111261 |
25.99 |
| 2026-04-11 12:00 |
22:32:27.36 |
-11:20:33.3 |
HIP 111261 |
24.11 |
| 2026-04-12 00:00 |
22:32:48.32 |
-11:19:10.5 |
HIP 111261 |
23.35 |
| 2026-04-12 12:00 |
22:33:09.20 |
-11:17:48.3 |
HIP 111261 |
23.78 |
| 2026-04-13 00:00 |
22:33:29.98 |
-11:16:26.6 |
HIP 111475 |
23.69 |
| 2026-04-13 12:00 |
22:33:50.67 |
-11:15:05.3 |
HIP 111475 |
18.54 |
| 2026-04-14 00:00 |
22:34:11.28 |
-11:13:44.7 |
HIP 111475 |
13.49 |
| 2026-04-14 12:00 |
22:34:31.79 |
-11:12:24.5 |
HIP 111475 |
8.67 |
| 2026-04-15 00:00 |
22:34:52.22 |
-11:11:04.9 |
HIP 111475 |
4.75 |
| 2026-04-15 12:00 |
22:35:12.55 |
-11:09:45.9 |
HIP 111475 |
4.85 |
| 2026-04-16 00:00 |
22:35:32.79 |
-11:08:27.3 |
HIP 111475 |
8.79 |