C/2024 C2 (PANSTARRS)
メタデータ
| 項目 |
値 |
| Designation |
C/2024 C2 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2025-03-10T09:41:40.943040Z |
| Orbit solution date (soln_date, UTC) |
2024-05-07T13:42:26Z |
| Obs used |
65 |
| NEO |
- |
| M1 |
6.200 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-02-01T10:02:20.169600Z |
| Discovery magnitude (MPC) |
20.52 w |
| Discovery observatory (MPC) |
F52 · Pan-STARRS 2, Haleakala |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2024-02-05.0000000 |
| e |
0.44399030 |
| q (au) |
8.991478 |
| a (au) |
16.171441 |
| i (deg) |
27.284750 |
| Ω (om, deg) |
66.444490 |
| ω (w, deg) |
87.533754 |
| M (ma, deg) |
353.946684 |
等級
散乱 + 全体線形
$$
M_a = (1.228 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
1.228 |
| n |
6.000 |
| gf |
0.905 |
| gb |
-1.000 |
| k |
1.000 |
| δ90 |
6.811 |
| 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 |
12:29:50.77 |
+28:38:25.7 |
HIP 60908 |
18.91 |
| 2026-02-03 12:00 |
12:29:47.26 |
+28:39:51.3 |
HIP 60908 |
17.32 |
| 2026-02-04 00:00 |
12:29:43.65 |
+28:41:16.9 |
HIP 60908 |
15.72 |
| 2026-02-04 12:00 |
12:29:39.92 |
+28:42:42.6 |
HIP 60908 |
14.11 |
| 2026-02-05 00:00 |
12:29:36.08 |
+28:44:08.2 |
HIP 60908 |
12.49 |
| 2026-02-05 12:00 |
12:29:32.13 |
+28:45:33.8 |
HIP 60908 |
10.87 |
| 2026-02-06 00:00 |
12:29:28.08 |
+28:46:59.4 |
HIP 60908 |
9.24 |
| 2026-02-06 12:00 |
12:29:23.91 |
+28:48:24.9 |
HIP 60908 |
7.62 |
| 2026-02-07 00:00 |
12:29:19.64 |
+28:49:50.3 |
HIP 60908 |
6.03 |
| 2026-02-07 12:00 |
12:29:15.26 |
+28:51:15.7 |
HIP 60908 |
4.49 |
| 2026-02-08 00:00 |
12:29:10.78 |
+28:52:41.0 |
HIP 60908 |
3.12 |
| 2026-02-08 12:00 |
12:29:06.19 |
+28:54:06.2 |
HIP 60908 |
2.28 |
| 2026-02-09 00:00 |
12:29:01.49 |
+28:55:31.3 |
HIP 60908 |
2.57 |
| 2026-02-09 12:00 |
12:28:56.69 |
+28:56:56.2 |
HIP 60908 |
3.77 |
| 2026-02-10 00:00 |
12:28:51.79 |
+28:58:21.0 |
HIP 60908 |
5.29 |
| 2026-02-10 12:00 |
12:28:46.78 |
+28:59:45.7 |
HIP 60908 |
6.94 |
| 2026-02-11 00:00 |
12:28:41.67 |
+29:01:10.2 |
HIP 60908 |
8.65 |
| 2026-02-11 12:00 |
12:28:36.46 |
+29:02:34.5 |
HIP 60908 |
10.39 |
| 2026-02-12 00:00 |
12:28:31.15 |
+29:03:58.7 |
HIP 60908 |
12.17 |
| 2026-02-12 12:00 |
12:28:25.73 |
+29:05:22.6 |
HIP 60908 |
13.96 |
| 2026-02-13 00:00 |
12:28:20.22 |
+29:06:46.3 |
HIP 60908 |
15.77 |
| 2026-02-13 12:00 |
12:28:14.61 |
+29:08:09.8 |
HIP 60908 |
17.59 |
| 2026-02-14 00:00 |
12:28:08.90 |
+29:09:33.1 |
HIP 60908 |
19.43 |
| 2026-02-14 12:00 |
12:28:03.09 |
+29:10:56.1 |
HIP 60908 |
21.28 |
| 2026-02-15 00:00 |
12:27:57.18 |
+29:12:18.8 |
HIP 60908 |
23.14 |
| 2026-02-15 12:00 |
12:27:51.18 |
+29:13:41.2 |
HIP 60675 |
23.12 |
| 2026-02-16 00:00 |
12:27:45.09 |
+29:15:03.4 |
HIP 60675 |
21.84 |
| 2026-02-16 12:00 |
12:27:38.90 |
+29:16:25.2 |
HIP 60675 |
20.64 |
| 2026-02-17 00:00 |
12:27:32.62 |
+29:17:46.7 |
HIP 60675 |
19.53 |
| 2026-02-17 12:00 |
12:27:26.25 |
+29:19:07.9 |
HIP 60675 |
18.54 |
| 2026-02-18 00:00 |
12:27:19.78 |
+29:20:28.7 |
HIP 60675 |
17.69 |
| 2026-02-18 12:00 |
12:27:13.23 |
+29:21:49.2 |
HIP 60675 |
17.00 |
| 2026-02-19 00:00 |
12:27:06.58 |
+29:23:09.2 |
HIP 60675 |
16.49 |
| 2026-02-19 12:00 |
12:26:59.85 |
+29:24:28.9 |
HIP 60675 |
16.19 |
| 2026-02-20 00:00 |
12:26:53.03 |
+29:25:48.2 |
HIP 60675 |
16.11 |
| 2026-02-20 12:00 |
12:26:46.13 |
+29:27:07.1 |
HIP 60675 |
16.26 |
| 2026-02-21 00:00 |
12:26:39.14 |
+29:28:25.5 |
HIP 60675 |
16.64 |
| 2026-02-21 12:00 |
12:26:32.07 |
+29:29:43.5 |
HIP 60675 |
17.23 |
| 2026-02-22 00:00 |
12:26:24.91 |
+29:31:01.0 |
HIP 60675 |
18.02 |
| 2026-02-22 12:00 |
12:26:17.68 |
+29:32:18.1 |
HIP 60675 |
18.98 |
| 2026-02-23 00:00 |
12:26:10.36 |
+29:33:34.7 |
HIP 60675 |
20.09 |
| 2026-02-23 12:00 |
12:26:02.96 |
+29:34:50.8 |
HIP 60675 |
21.33 |
| 2026-02-24 00:00 |
12:25:55.49 |
+29:36:06.3 |
HIP 60675 |
22.69 |