C/2024 F2 (PANSTARRS)
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) |
| 2026-02-03 00:00 |
21:35:37.82 |
-15:08:12.6 |
HIP 106710 |
24.57 |
| 2026-02-03 12:00 |
21:36:05.66 |
-15:06:28.9 |
HIP 106710 |
21.24 |
| 2026-02-04 00:00 |
21:36:33.48 |
-15:04:45.0 |
HIP 106710 |
19.88 |
| 2026-02-04 12:00 |
21:37:01.30 |
-15:03:00.9 |
HIP 106829 |
19.46 |
| 2026-02-05 00:00 |
21:37:29.09 |
-15:01:16.6 |
HIP 106829 |
12.72 |
| 2026-02-05 12:00 |
21:37:56.88 |
-14:59:32.1 |
HIP 106829 |
6.43 |
| 2026-02-06 00:00 |
21:38:24.64 |
-14:57:47.5 |
HIP 106829 |
4.10 |
| 2026-02-06 12:00 |
21:38:52.39 |
-14:56:02.7 |
HIP 106829 |
9.40 |
| 2026-02-07 00:00 |
21:39:20.13 |
-14:54:17.8 |
HIP 106829 |
15.99 |
| 2026-02-07 12:00 |
21:39:47.85 |
-14:52:32.7 |
HIP 106829 |
22.78 |
| 2026-02-08 00:00 |
21:40:15.55 |
-14:50:47.5 |
HIP 107088 |
17.53 |
| 2026-02-08 12:00 |
21:40:43.23 |
-14:49:02.1 |
HIP 107088 |
10.94 |
| 2026-02-09 00:00 |
21:41:10.89 |
-14:47:16.6 |
HIP 107088 |
5.25 |
| 2026-02-09 12:00 |
21:41:38.54 |
-14:45:31.0 |
HIP 107088 |
5.57 |
| 2026-02-10 00:00 |
21:42:06.16 |
-14:43:45.2 |
HIP 107098 |
7.97 |
| 2026-02-10 12:00 |
21:42:33.77 |
-14:41:59.3 |
HIP 107098 |
13.81 |
| 2026-02-11 00:00 |
21:43:01.35 |
-14:40:13.3 |
HIP 107302 |
15.18 |
| 2026-02-11 12:00 |
21:43:28.91 |
-14:38:27.2 |
HIP 107302 |
10.13 |
| 2026-02-12 00:00 |
21:43:56.45 |
-14:36:40.9 |
HIP 107302 |
8.35 |
| 2026-02-12 12:00 |
21:44:23.97 |
-14:34:54.6 |
HIP 107302 |
11.49 |
| 2026-02-13 00:00 |
21:44:51.46 |
-14:33:08.1 |
HIP 107302 |
17.00 |
| 2026-02-13 12:00 |
21:45:18.93 |
-14:31:21.6 |
HIP 107302 |
23.25 |
| 2026-02-14 00:00 |
21:45:46.38 |
-14:29:35.0 |
HIP 107567 |
20.35 |
| 2026-02-14 12:00 |
21:46:13.80 |
-14:27:48.3 |
HIP 107567 |
14.01 |
| 2026-02-15 00:00 |
21:46:41.19 |
-14:26:01.5 |
HIP 107567 |
8.53 |
| 2026-02-15 12:00 |
21:47:08.55 |
-14:24:14.6 |
HIP 107567 |
6.60 |
| 2026-02-16 00:00 |
21:47:35.89 |
-14:22:27.7 |
HIP 107567 |
10.41 |
| 2026-02-16 12:00 |
21:48:03.20 |
-14:20:40.7 |
HIP 107667 |
12.96 |
| 2026-02-17 00:00 |
21:48:30.49 |
-14:18:53.6 |
HIP 107667 |
8.97 |
| 2026-02-17 12:00 |
21:48:57.74 |
-14:17:06.5 |
HIP 107667 |
9.32 |
| 2026-02-18 00:00 |
21:49:24.96 |
-14:15:19.4 |
HIP 107667 |
13.66 |
| 2026-02-18 12:00 |
21:49:52.16 |
-14:13:32.2 |
HIP 107667 |
19.48 |
| 2026-02-19 00:00 |
21:50:19.32 |
-14:11:45.0 |
HIP 107667 |
25.80 |
| 2026-02-19 12:00 |
21:50:46.45 |
-14:09:57.7 |
HIP 107667 |
32.31 |
| 2026-02-20 00:00 |
21:51:13.54 |
-14:08:10.4 |
HIP 108044 |
31.22 |
| 2026-02-20 12:00 |
21:51:40.61 |
-14:06:23.2 |
HIP 108044 |
25.00 |
| 2026-02-21 00:00 |
21:52:07.64 |
-14:04:35.9 |
HIP 108044 |
19.18 |
| 2026-02-21 12:00 |
21:52:34.63 |
-14:02:48.5 |
HIP 108044 |
14.26 |
| 2026-02-22 00:00 |
21:53:01.59 |
-14:01:01.2 |
HIP 108044 |
11.44 |
| 2026-02-22 12:00 |
21:53:28.52 |
-13:59:13.9 |
HIP 108044 |
12.26 |
| 2026-02-23 00:00 |
21:53:55.40 |
-13:57:26.6 |
HIP 108044 |
16.16 |
| 2026-02-23 12:00 |
21:54:22.25 |
-13:55:39.3 |
HIP 108044 |
21.52 |
| 2026-02-24 00:00 |
21:54:49.07 |
-13:53:52.1 |
HIP 108274 |
20.77 |