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) |
| 2026-03-26 00:00 |
12:16:51.17 |
+30:29:34.2 |
HIP 59936 |
12.22 |
| 2026-03-26 12:00 |
12:16:41.36 |
+30:29:59.7 |
HIP 59936 |
14.23 |
| 2026-03-27 00:00 |
12:16:31.56 |
+30:30:24.2 |
HIP 59936 |
16.27 |
| 2026-03-27 12:00 |
12:16:21.76 |
+30:30:47.6 |
HIP 59936 |
18.32 |
| 2026-03-28 00:00 |
12:16:11.98 |
+30:31:09.9 |
HIP 59936 |
20.39 |
| 2026-03-28 12:00 |
12:16:02.20 |
+30:31:31.1 |
HIP 59936 |
22.46 |
| 2026-03-29 00:00 |
12:15:52.44 |
+30:31:51.3 |
HIP 59936 |
24.53 |
| 2026-03-29 12:00 |
12:15:42.69 |
+30:32:10.4 |
HIP 59735 |
25.30 |
| 2026-03-30 00:00 |
12:15:32.95 |
+30:32:28.4 |
HIP 59666 |
24.67 |
| 2026-03-30 12:00 |
12:15:23.23 |
+30:32:45.3 |
HIP 59666 |
22.97 |
| 2026-03-31 00:00 |
12:15:13.53 |
+30:33:01.1 |
HIP 59617 |
21.30 |
| 2026-03-31 12:00 |
12:15:03.84 |
+30:33:15.9 |
HIP 59617 |
19.21 |
| 2026-04-01 00:00 |
12:14:54.18 |
+30:33:29.5 |
HIP 59617 |
17.12 |
| 2026-04-01 12:00 |
12:14:44.53 |
+30:33:42.0 |
HIP 59617 |
15.05 |
| 2026-04-02 00:00 |
12:14:34.91 |
+30:33:53.5 |
HIP 59617 |
12.97 |
| 2026-04-02 12:00 |
12:14:25.32 |
+30:34:03.8 |
HIP 59617 |
10.91 |
| 2026-04-03 00:00 |
12:14:15.75 |
+30:34:13.1 |
HIP 59617 |
8.86 |
| 2026-04-03 12:00 |
12:14:06.20 |
+30:34:21.2 |
HIP 59617 |
6.82 |
| 2026-04-04 00:00 |
12:13:56.68 |
+30:34:28.2 |
HIP 59617 |
4.80 |
| 2026-04-04 12:00 |
12:13:47.20 |
+30:34:34.1 |
HIP 59617 |
2.82 |
| 2026-04-05 00:00 |
12:13:37.74 |
+30:34:38.9 |
HIP 59617 |
1.12 |
| 2026-04-05 12:00 |
12:13:28.31 |
+30:34:42.6 |
HIP 59617 |
1.67 |
| 2026-04-06 00:00 |
12:13:18.92 |
+30:34:45.2 |
HIP 59617 |
3.53 |
| 2026-04-06 12:00 |
12:13:09.57 |
+30:34:46.7 |
HIP 59617 |
5.50 |
| 2026-04-07 00:00 |
12:13:00.24 |
+30:34:47.0 |
HIP 59617 |
7.48 |
| 2026-04-07 12:00 |
12:12:50.96 |
+30:34:46.2 |
HIP 59617 |
9.46 |
| 2026-04-08 00:00 |
12:12:41.71 |
+30:34:44.3 |
HIP 59617 |
11.44 |
| 2026-04-08 12:00 |
12:12:32.51 |
+30:34:41.3 |
HIP 59617 |
13.41 |
| 2026-04-09 00:00 |
12:12:23.34 |
+30:34:37.1 |
HIP 59617 |
15.37 |
| 2026-04-09 12:00 |
12:12:14.21 |
+30:34:31.8 |
HIP 59617 |
17.33 |
| 2026-04-10 00:00 |
12:12:05.13 |
+30:34:25.4 |
HIP 59617 |
19.28 |
| 2026-04-10 12:00 |
12:11:56.10 |
+30:34:17.9 |
HIP 59617 |
21.22 |
| 2026-04-11 00:00 |
12:11:47.11 |
+30:34:09.2 |
HIP 59617 |
23.15 |
| 2026-04-11 12:00 |
12:11:38.17 |
+30:33:59.5 |
HIP 59311 |
22.62 |
| 2026-04-12 00:00 |
12:11:29.27 |
+30:33:48.5 |
HIP 59311 |
20.84 |
| 2026-04-12 12:00 |
12:11:20.43 |
+30:33:36.5 |
HIP 59311 |
19.09 |
| 2026-04-13 00:00 |
12:11:11.63 |
+30:33:23.3 |
HIP 59311 |
17.37 |
| 2026-04-13 12:00 |
12:11:02.89 |
+30:33:09.0 |
HIP 59311 |
15.70 |
| 2026-04-14 00:00 |
12:10:54.21 |
+30:32:53.6 |
HIP 59311 |
14.07 |
| 2026-04-14 12:00 |
12:10:45.57 |
+30:32:37.0 |
HIP 59311 |
12.52 |
| 2026-04-15 00:00 |
12:10:37.00 |
+30:32:19.3 |
HIP 59311 |
11.06 |
| 2026-04-15 12:00 |
12:10:28.48 |
+30:32:00.5 |
HIP 59311 |
9.74 |
| 2026-04-16 00:00 |
12:10:20.02 |
+30:31:40.5 |
HIP 59311 |
8.60 |