メタデータ
| 項目 |
値 |
| Designation |
C/2024 C1 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2024-08-30T22:56:59.887680Z |
| Orbit solution date (soln_date, UTC) |
2025-07-07T14:12:18Z |
| Obs used |
188 |
| NEO |
- |
| M1 |
14.400 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-02-09T09:41:44.390400Z |
| Discovery magnitude (MPC) |
21.20 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) |
2024-12-14.0000000 |
| e |
0.58255898 |
| q (au) |
4.412801 |
| a (au) |
10.571075 |
| i (deg) |
14.226966 |
| Ω (om, deg) |
83.809025 |
| ω (w, deg) |
94.478490 |
| M (ma, deg) |
3.012281 |
等級
散乱 + 全体線形
$$
M_a = (14.508 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
14.508 |
| n |
2.000 |
| gf |
0.838 |
| gb |
-0.500 |
| k |
0.862 |
| δ90 |
2.410 |
| 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
ファインディングチャート
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
16:39:23.82 |
-17:09:11.3 |
HIP 81647 |
21.25 |
| 2026-05-12 12:00 |
16:39:10.85 |
-17:09:16.8 |
HIP 81647 |
24.01 |
| 2026-05-13 00:00 |
16:38:57.81 |
-17:09:22.3 |
HIP 81409 |
26.63 |
| 2026-05-13 12:00 |
16:38:44.68 |
-17:09:27.8 |
HIP 81409 |
24.53 |
| 2026-05-14 00:00 |
16:38:31.49 |
-17:09:33.4 |
HIP 81366 |
21.79 |
| 2026-05-14 12:00 |
16:38:18.22 |
-17:09:39.1 |
HIP 81366 |
18.62 |
| 2026-05-15 00:00 |
16:38:04.88 |
-17:09:44.9 |
HIP 81366 |
15.43 |
| 2026-05-15 12:00 |
16:37:51.47 |
-17:09:50.7 |
HIP 81366 |
12.23 |
| 2026-05-16 00:00 |
16:37:38.00 |
-17:09:56.7 |
HIP 81366 |
9.02 |
| 2026-05-16 12:00 |
16:37:24.46 |
-17:10:02.7 |
HIP 81366 |
5.80 |
| 2026-05-17 00:00 |
16:37:10.87 |
-17:10:08.8 |
HIP 81366 |
2.59 |
| 2026-05-17 12:00 |
16:36:57.21 |
-17:10:14.9 |
HIP 81366 |
0.98 |
| 2026-05-18 00:00 |
16:36:43.50 |
-17:10:21.2 |
HIP 81366 |
4.07 |
| 2026-05-18 12:00 |
16:36:29.74 |
-17:10:27.6 |
HIP 81366 |
7.34 |
| 2026-05-19 00:00 |
16:36:15.92 |
-17:10:34.0 |
HIP 81366 |
10.64 |
| 2026-05-19 12:00 |
16:36:02.06 |
-17:10:40.6 |
HIP 81366 |
13.94 |
| 2026-05-20 00:00 |
16:35:48.16 |
-17:10:47.2 |
HIP 81366 |
17.26 |
| 2026-05-20 12:00 |
16:35:34.21 |
-17:10:54.0 |
HIP 81366 |
20.60 |
| 2026-05-21 00:00 |
16:35:20.22 |
-17:11:00.9 |
HIP 81366 |
23.94 |
| 2026-05-21 12:00 |
16:35:06.19 |
-17:11:07.9 |
HIP 81366 |
27.29 |
| 2026-05-22 00:00 |
16:34:52.13 |
-17:11:15.0 |
HIP 81366 |
30.65 |
| 2026-05-22 12:00 |
16:34:38.03 |
-17:11:22.3 |
HIP 81366 |
34.02 |
| 2026-05-23 00:00 |
16:34:23.91 |
-17:11:29.7 |
HIP 81366 |
37.39 |
| 2026-05-23 12:00 |
16:34:09.75 |
-17:11:37.2 |
HIP 80998 |
35.96 |
| 2026-05-24 00:00 |
16:33:55.57 |
-17:11:44.8 |
HIP 80998 |
33.75 |
| 2026-05-24 12:00 |
16:33:41.37 |
-17:11:52.5 |
HIP 80998 |
31.75 |
| 2026-05-25 00:00 |
16:33:27.15 |
-17:12:00.4 |
HIP 80998 |
30.00 |
| 2026-05-25 12:00 |
16:33:12.91 |
-17:12:08.5 |
HIP 80998 |
28.54 |
| 2026-05-26 00:00 |
16:32:58.65 |
-17:12:16.7 |
HIP 80998 |
27.43 |
| 2026-05-26 12:00 |
16:32:44.38 |
-17:12:25.0 |
HIP 80998 |
26.70 |
| 2026-05-27 00:00 |
16:32:30.10 |
-17:12:33.4 |
HIP 80998 |
26.39 |
| 2026-05-27 12:00 |
16:32:15.81 |
-17:12:42.1 |
HIP 80998 |
26.52 |
| 2026-05-28 00:00 |
16:32:01.51 |
-17:12:50.8 |
HIP 80998 |
27.08 |
| 2026-05-28 12:00 |
16:31:47.21 |
-17:12:59.8 |
HIP 80998 |
28.04 |
| 2026-05-29 00:00 |
16:31:32.91 |
-17:13:08.8 |
HIP 80998 |
29.37 |
| 2026-05-29 12:00 |
16:31:18.61 |
-17:13:18.1 |
HIP 80940 |
29.89 |
| 2026-05-30 00:00 |
16:31:04.31 |
-17:13:27.5 |
HIP 80940 |
30.47 |
| 2026-05-30 12:00 |
16:30:50.02 |
-17:13:37.1 |
HIP 80940 |
31.41 |
| 2026-05-31 00:00 |
16:30:35.73 |
-17:13:46.8 |
HIP 80711 |
30.41 |
| 2026-05-31 12:00 |
16:30:21.45 |
-17:13:56.7 |
HIP 80711 |
27.40 |
| 2026-06-01 00:00 |
16:30:07.19 |
-17:14:06.8 |
HIP 80711 |
24.49 |
| 2026-06-01 12:00 |
16:29:52.94 |
-17:14:17.1 |
HIP 80711 |
21.73 |
| 2026-06-02 00:00 |
16:29:38.70 |
-17:14:27.6 |
HIP 80711 |
19.19 |