メタデータ
| 項目 |
値 |
| Designation |
C/2024 F2 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2024-07-29T05:46:49.535040Z |
| Orbit solution date (soln_date, UTC) |
2026-04-03T09:12:19Z |
| Obs used |
223 |
| NEO |
- |
| M1 |
7.500 |
| K1 |
15.750 |
| 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) |
2024-08-21.0000000 |
| e |
0.60120060 |
| q (au) |
3.968209 |
| a (au) |
9.950389 |
| i (deg) |
13.740805 |
| Ω (om, deg) |
138.947892 |
| ω (w, deg) |
112.924995 |
| M (ma, deg) |
0.714661 |
等級
散乱 + 全体線形
$$
M_a = (7.553 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
7.553 |
| n |
6.000 |
| gf |
0.900 |
| gb |
-0.833 |
| k |
0.999 |
| δ90 |
4.835 |
| 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) |
| 2026-09-20 00:00 |
22:40:34.21 |
-14:36:14.0 |
HIP 111931 |
3.22 |
| 2026-09-20 12:00 |
22:40:23.56 |
-14:37:35.4 |
HIP 111931 |
1.49 |
| 2026-09-21 00:00 |
22:40:12.98 |
-14:38:55.9 |
HIP 111931 |
3.30 |
| 2026-09-21 12:00 |
22:40:02.49 |
-14:40:15.6 |
HIP 111931 |
5.99 |
| 2026-09-22 00:00 |
22:39:52.08 |
-14:41:34.5 |
HIP 111892 |
8.50 |
| 2026-09-22 12:00 |
22:39:41.74 |
-14:42:52.5 |
HIP 111892 |
10.30 |
| 2026-09-23 00:00 |
22:39:31.50 |
-14:44:09.7 |
HIP 111892 |
12.46 |
| 2026-09-23 12:00 |
22:39:21.33 |
-14:45:26.0 |
HIP 111892 |
14.81 |
| 2026-09-24 00:00 |
22:39:11.26 |
-14:46:41.5 |
HIP 111892 |
17.26 |
| 2026-09-24 12:00 |
22:39:01.27 |
-14:47:56.0 |
HIP 111892 |
19.76 |
| 2026-09-25 00:00 |
22:38:51.37 |
-14:49:09.8 |
HIP 111892 |
22.29 |
| 2026-09-25 12:00 |
22:38:41.57 |
-14:50:22.6 |
HIP 111665 |
22.21 |
| 2026-09-26 00:00 |
22:38:31.85 |
-14:51:34.5 |
HIP 111665 |
19.59 |
| 2026-09-26 12:00 |
22:38:22.23 |
-14:52:45.6 |
HIP 111665 |
17.01 |
| 2026-09-27 00:00 |
22:38:12.71 |
-14:53:55.7 |
HIP 111665 |
14.45 |
| 2026-09-27 12:00 |
22:38:03.28 |
-14:55:05.0 |
HIP 111665 |
11.93 |
| 2026-09-28 00:00 |
22:37:53.95 |
-14:56:13.3 |
HIP 111665 |
9.46 |
| 2026-09-28 12:00 |
22:37:44.73 |
-14:57:20.7 |
HIP 111665 |
7.06 |
| 2026-09-29 00:00 |
22:37:35.60 |
-14:58:27.2 |
HIP 111665 |
4.78 |
| 2026-09-29 12:00 |
22:37:26.57 |
-14:59:32.8 |
HIP 111665 |
2.84 |
| 2026-09-30 00:00 |
22:37:17.65 |
-15:00:37.4 |
HIP 111665 |
2.27 |
| 2026-09-30 12:00 |
22:37:08.83 |
-15:01:41.1 |
HIP 111665 |
3.69 |
| 2026-10-01 00:00 |
22:37:00.12 |
-15:02:43.9 |
HIP 111665 |
5.76 |
| 2026-10-01 12:00 |
22:36:51.52 |
-15:03:45.7 |
HIP 111665 |
7.95 |
| 2026-10-02 00:00 |
22:36:43.03 |
-15:04:46.6 |
HIP 111665 |
10.17 |
| 2026-10-02 12:00 |
22:36:34.64 |
-15:05:46.5 |
HIP 111665 |
12.38 |
| 2026-10-03 00:00 |
22:36:26.37 |
-15:06:45.5 |
HIP 111665 |
14.57 |
| 2026-10-03 12:00 |
22:36:18.21 |
-15:07:43.5 |
HIP 111665 |
16.74 |
| 2026-10-04 00:00 |
22:36:10.17 |
-15:08:40.6 |
HIP 111665 |
18.89 |
| 2026-10-04 12:00 |
22:36:02.24 |
-15:09:36.6 |
HIP 111665 |
21.00 |
| 2026-10-05 00:00 |
22:35:54.42 |
-15:10:31.7 |
HIP 111424 |
21.41 |
| 2026-10-05 12:00 |
22:35:46.73 |
-15:11:25.8 |
HIP 111424 |
19.76 |
| 2026-10-06 00:00 |
22:35:39.15 |
-15:12:18.9 |
HIP 111424 |
18.21 |
| 2026-10-06 12:00 |
22:35:31.70 |
-15:13:11.0 |
HIP 111424 |
16.79 |
| 2026-10-07 00:00 |
22:35:24.37 |
-15:14:02.2 |
HIP 111424 |
15.52 |
| 2026-10-07 12:00 |
22:35:17.15 |
-15:14:52.3 |
HIP 111424 |
14.42 |
| 2026-10-08 00:00 |
22:35:10.07 |
-15:15:41.4 |
HIP 111424 |
13.52 |
| 2026-10-08 12:00 |
22:35:03.11 |
-15:16:29.6 |
HIP 111424 |
12.84 |
| 2026-10-09 00:00 |
22:34:56.27 |
-15:17:16.7 |
HIP 111424 |
12.42 |
| 2026-10-09 12:00 |
22:34:49.56 |
-15:18:02.8 |
HIP 111424 |
12.25 |
| 2026-10-10 00:00 |
22:34:42.98 |
-15:18:47.9 |
HIP 111424 |
12.34 |
| 2026-10-10 12:00 |
22:34:36.53 |
-15:19:32.0 |
HIP 111424 |
12.66 |
| 2026-10-11 00:00 |
22:34:30.21 |
-15:20:15.0 |
HIP 111424 |
13.19 |