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) |
| 2026-05-12 00:00 |
12:04:45.19 |
+29:49:44.7 |
HIP 58795 |
18.03 |
| 2026-05-12 12:00 |
12:04:41.13 |
+29:48:29.9 |
HIP 58795 |
16.66 |
| 2026-05-13 00:00 |
12:04:37.18 |
+29:47:14.3 |
HIP 58795 |
15.33 |
| 2026-05-13 12:00 |
12:04:33.33 |
+29:45:57.8 |
HIP 58795 |
14.06 |
| 2026-05-14 00:00 |
12:04:29.57 |
+29:44:40.4 |
HIP 58795 |
12.86 |
| 2026-05-14 12:00 |
12:04:25.92 |
+29:43:22.1 |
HIP 58795 |
11.75 |
| 2026-05-15 00:00 |
12:04:22.38 |
+29:42:02.9 |
HIP 58795 |
10.76 |
| 2026-05-15 12:00 |
12:04:18.93 |
+29:40:42.8 |
HIP 58795 |
9.94 |
| 2026-05-16 00:00 |
12:04:15.59 |
+29:39:21.9 |
HIP 58795 |
9.32 |
| 2026-05-16 12:00 |
12:04:12.35 |
+29:38:00.0 |
HIP 58795 |
8.94 |
| 2026-05-17 00:00 |
12:04:09.22 |
+29:36:37.4 |
HIP 58795 |
8.85 |
| 2026-05-17 12:00 |
12:04:06.19 |
+29:35:13.9 |
HIP 58795 |
9.05 |
| 2026-05-18 00:00 |
12:04:03.27 |
+29:33:49.5 |
HIP 58795 |
9.52 |
| 2026-05-18 12:00 |
12:04:00.45 |
+29:32:24.3 |
HIP 58795 |
10.24 |
| 2026-05-19 00:00 |
12:03:57.74 |
+29:30:58.3 |
HIP 58795 |
11.14 |
| 2026-05-19 12:00 |
12:03:55.13 |
+29:29:31.4 |
HIP 58795 |
12.20 |
| 2026-05-20 00:00 |
12:03:52.63 |
+29:28:03.8 |
HIP 58795 |
13.37 |
| 2026-05-20 12:00 |
12:03:50.24 |
+29:26:35.3 |
HIP 58795 |
14.64 |
| 2026-05-21 00:00 |
12:03:47.95 |
+29:25:06.0 |
HIP 58795 |
15.98 |
| 2026-05-21 12:00 |
12:03:45.77 |
+29:23:35.9 |
HIP 58795 |
17.37 |
| 2026-05-22 00:00 |
12:03:43.70 |
+29:22:05.1 |
HIP 58777 |
15.83 |
| 2026-05-22 12:00 |
12:03:41.73 |
+29:20:33.4 |
HIP 58777 |
14.25 |
| 2026-05-23 00:00 |
12:03:39.87 |
+29:19:01.0 |
HIP 58777 |
12.67 |
| 2026-05-23 12:00 |
12:03:38.12 |
+29:17:27.8 |
HIP 58777 |
11.09 |
| 2026-05-24 00:00 |
12:03:36.47 |
+29:15:53.9 |
HIP 58777 |
9.51 |
| 2026-05-24 12:00 |
12:03:34.93 |
+29:14:19.2 |
HIP 58777 |
7.94 |
| 2026-05-25 00:00 |
12:03:33.50 |
+29:12:43.8 |
HIP 58777 |
6.39 |
| 2026-05-25 12:00 |
12:03:32.18 |
+29:11:07.6 |
HIP 58777 |
4.90 |
| 2026-05-26 00:00 |
12:03:30.96 |
+29:09:30.7 |
HIP 58777 |
3.54 |
| 2026-05-26 12:00 |
12:03:29.85 |
+29:07:53.1 |
HIP 58777 |
2.56 |
| 2026-05-27 00:00 |
12:03:28.85 |
+29:06:14.8 |
HIP 58777 |
2.46 |
| 2026-05-27 12:00 |
12:03:27.95 |
+29:04:35.8 |
HIP 58777 |
3.35 |
| 2026-05-28 00:00 |
12:03:27.16 |
+29:02:56.0 |
HIP 58777 |
4.70 |
| 2026-05-28 12:00 |
12:03:26.48 |
+29:01:15.6 |
HIP 58777 |
6.23 |
| 2026-05-29 00:00 |
12:03:25.91 |
+28:59:34.5 |
HIP 58777 |
7.83 |
| 2026-05-29 12:00 |
12:03:25.45 |
+28:57:52.7 |
HIP 58777 |
9.48 |
| 2026-05-30 00:00 |
12:03:25.09 |
+28:56:10.2 |
HIP 58777 |
11.16 |
| 2026-05-30 12:00 |
12:03:24.84 |
+28:54:27.0 |
HIP 58777 |
12.86 |
| 2026-05-31 00:00 |
12:03:24.69 |
+28:52:43.2 |
HIP 58777 |
14.58 |
| 2026-05-31 12:00 |
12:03:24.66 |
+28:50:58.8 |
HIP 58777 |
16.31 |
| 2026-06-01 00:00 |
12:03:24.73 |
+28:49:13.7 |
HIP 58777 |
18.06 |
| 2026-06-01 12:00 |
12:03:24.90 |
+28:47:27.9 |
HIP 58777 |
19.82 |
| 2026-06-02 00:00 |
12:03:25.19 |
+28:45:41.5 |
HIP 58777 |
21.59 |