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) |
| 2026-06-01 00:00 |
22:58:46.48 |
-09:58:37.6 |
HIP 113310 |
33.53 |
| 2026-06-01 12:00 |
22:58:55.75 |
-09:58:31.6 |
HIP 113310 |
35.56 |
| 2026-06-02 00:00 |
22:59:04.88 |
-09:58:26.5 |
HIP 113310 |
37.58 |
| 2026-06-02 12:00 |
22:59:13.87 |
-09:58:22.4 |
HIP 113658 |
37.70 |
| 2026-06-03 00:00 |
22:59:22.71 |
-09:58:19.2 |
HIP 113658 |
36.07 |
| 2026-06-03 12:00 |
22:59:31.41 |
-09:58:17.1 |
HIP 113658 |
34.54 |
| 2026-06-04 00:00 |
22:59:39.96 |
-09:58:15.9 |
HIP 113658 |
33.11 |
| 2026-06-04 12:00 |
22:59:48.38 |
-09:58:15.6 |
HIP 113658 |
31.79 |
| 2026-06-05 00:00 |
22:59:56.64 |
-09:58:16.4 |
HIP 113658 |
30.59 |
| 2026-06-05 12:00 |
23:00:04.77 |
-09:58:18.1 |
HIP 113658 |
29.51 |
| 2026-06-06 00:00 |
23:00:12.74 |
-09:58:20.8 |
HIP 113658 |
28.56 |
| 2026-06-06 12:00 |
23:00:20.57 |
-09:58:24.5 |
HIP 113658 |
27.75 |
| 2026-06-07 00:00 |
23:00:28.26 |
-09:58:29.2 |
HIP 113658 |
27.09 |
| 2026-06-07 12:00 |
23:00:35.80 |
-09:58:34.9 |
HIP 113658 |
26.56 |
| 2026-06-08 00:00 |
23:00:43.19 |
-09:58:41.6 |
HIP 113658 |
26.19 |
| 2026-06-08 12:00 |
23:00:50.43 |
-09:58:49.3 |
HIP 113658 |
25.96 |
| 2026-06-09 00:00 |
23:00:57.52 |
-09:58:58.0 |
HIP 113658 |
25.87 |
| 2026-06-09 12:00 |
23:01:04.47 |
-09:59:07.7 |
HIP 113658 |
25.92 |
| 2026-06-10 00:00 |
23:01:11.26 |
-09:59:18.4 |
HIP 113658 |
26.10 |
| 2026-06-10 12:00 |
23:01:17.91 |
-09:59:30.1 |
HIP 113658 |
26.40 |
| 2026-06-11 00:00 |
23:01:24.41 |
-09:59:42.8 |
HIP 113658 |
26.80 |
| 2026-06-11 12:00 |
23:01:30.75 |
-09:59:56.5 |
HIP 113658 |
27.31 |
| 2026-06-12 00:00 |
23:01:36.95 |
-10:00:11.2 |
HIP 113658 |
27.90 |
| 2026-06-12 12:00 |
23:01:42.99 |
-10:00:27.0 |
HIP 113658 |
28.57 |
| 2026-06-13 00:00 |
23:01:48.88 |
-10:00:43.7 |
HIP 113658 |
29.30 |
| 2026-06-13 12:00 |
23:01:54.62 |
-10:01:01.5 |
HIP 113658 |
30.09 |
| 2026-06-14 00:00 |
23:02:00.21 |
-10:01:20.3 |
HIP 113658 |
30.93 |
| 2026-06-14 12:00 |
23:02:05.65 |
-10:01:40.2 |
HIP 113828 |
31.07 |
| 2026-06-15 00:00 |
23:02:10.93 |
-10:02:01.0 |
HIP 113828 |
30.79 |
| 2026-06-15 12:00 |
23:02:16.06 |
-10:02:22.9 |
HIP 113828 |
30.60 |
| 2026-06-16 00:00 |
23:02:21.03 |
-10:02:45.8 |
HIP 113828 |
30.50 |
| 2026-06-16 12:00 |
23:02:25.85 |
-10:03:09.7 |
HIP 113828 |
30.47 |
| 2026-06-17 00:00 |
23:02:30.52 |
-10:03:34.6 |
HIP 113828 |
30.53 |
| 2026-06-17 12:00 |
23:02:35.03 |
-10:04:00.6 |
HIP 113828 |
30.66 |
| 2026-06-18 00:00 |
23:02:39.39 |
-10:04:27.6 |
HIP 113828 |
30.86 |
| 2026-06-18 12:00 |
23:02:43.59 |
-10:04:55.5 |
HIP 113828 |
31.12 |
| 2026-06-19 00:00 |
23:02:47.64 |
-10:05:24.6 |
HIP 113828 |
31.45 |
| 2026-06-19 12:00 |
23:02:51.54 |
-10:05:54.6 |
HIP 113828 |
31.83 |
| 2026-06-20 00:00 |
23:02:55.28 |
-10:06:25.6 |
HIP 113828 |
32.26 |
| 2026-06-20 12:00 |
23:02:58.86 |
-10:06:57.7 |
HIP 113828 |
32.74 |
| 2026-06-21 00:00 |
23:03:02.29 |
-10:07:30.7 |
HIP 113828 |
33.27 |
| 2026-06-21 12:00 |
23:03:05.57 |
-10:08:04.8 |
HIP 113828 |
33.83 |
| 2026-06-22 00:00 |
23:03:08.69 |
-10:08:39.9 |
HIP 113828 |
34.43 |