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
$$
M_a = (14.430 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
14.430 |
| n |
2.000 |
| gf |
0.839 |
| gb |
-0.500 |
| k |
0.882 |
| δ90 |
3.487 |
| 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) |
| 2026-09-20 00:00 |
16:25:11.65 |
-19:51:55.0 |
HIP 80464 |
3.93 |
| 2026-09-20 12:00 |
16:25:26.20 |
-19:53:04.2 |
HIP 80464 |
2.84 |
| 2026-09-21 00:00 |
16:25:40.87 |
-19:54:13.4 |
HIP 80464 |
5.19 |
| 2026-09-21 12:00 |
16:25:55.65 |
-19:55:22.6 |
HIP 80464 |
8.52 |
| 2026-09-22 00:00 |
16:26:10.54 |
-19:56:31.9 |
HIP 80464 |
12.07 |
| 2026-09-22 12:00 |
16:26:25.55 |
-19:57:41.2 |
HIP 80464 |
15.70 |
| 2026-09-23 00:00 |
16:26:40.66 |
-19:58:50.6 |
HIP 80464 |
19.39 |
| 2026-09-23 12:00 |
16:26:55.89 |
-20:00:00.0 |
HIP 80464 |
23.12 |
| 2026-09-24 00:00 |
16:27:11.23 |
-20:01:09.5 |
HIP 80464 |
26.88 |
| 2026-09-24 12:00 |
16:27:26.67 |
-20:02:18.9 |
HIP 80464 |
30.67 |
| 2026-09-25 00:00 |
16:27:42.23 |
-20:03:28.4 |
HIP 80464 |
34.48 |
| 2026-09-25 12:00 |
16:27:57.89 |
-20:04:37.9 |
HIP 80464 |
38.33 |
| 2026-09-26 00:00 |
16:28:13.66 |
-20:05:47.5 |
HIP 80464 |
42.19 |
| 2026-09-26 12:00 |
16:28:29.54 |
-20:06:57.0 |
HIP 80464 |
46.09 |
| 2026-09-27 00:00 |
16:28:45.52 |
-20:08:06.6 |
HIP 80464 |
50.01 |
| 2026-09-27 12:00 |
16:29:01.61 |
-20:09:16.2 |
HIP 80877 |
47.73 |
| 2026-09-28 00:00 |
16:29:17.80 |
-20:10:25.8 |
HIP 80877 |
44.77 |
| 2026-09-28 12:00 |
16:29:34.10 |
-20:11:35.4 |
HIP 80877 |
41.97 |
| 2026-09-29 00:00 |
16:29:50.49 |
-20:12:45.0 |
HIP 81004 |
39.22 |
| 2026-09-29 12:00 |
16:30:07.00 |
-20:13:54.6 |
HIP 81004 |
35.73 |
| 2026-09-30 00:00 |
16:30:23.60 |
-20:15:04.1 |
HIP 81004 |
32.36 |
| 2026-09-30 12:00 |
16:30:40.30 |
-20:16:13.7 |
HIP 81004 |
29.13 |
| 2026-10-01 00:00 |
16:30:57.11 |
-20:17:23.3 |
HIP 81004 |
26.13 |
| 2026-10-01 12:00 |
16:31:14.01 |
-20:18:32.9 |
HIP 81004 |
23.45 |
| 2026-10-02 00:00 |
16:31:31.02 |
-20:19:42.4 |
HIP 81004 |
21.23 |
| 2026-10-02 12:00 |
16:31:48.12 |
-20:20:52.0 |
HIP 81004 |
19.63 |
| 2026-10-03 00:00 |
16:32:05.32 |
-20:22:01.5 |
HIP 81004 |
18.83 |
| 2026-10-03 12:00 |
16:32:22.62 |
-20:23:11.0 |
HIP 81004 |
18.95 |
| 2026-10-04 00:00 |
16:32:40.02 |
-20:24:20.4 |
HIP 81004 |
19.98 |
| 2026-10-04 12:00 |
16:32:57.51 |
-20:25:29.9 |
HIP 80992 |
20.96 |
| 2026-10-05 00:00 |
16:33:15.10 |
-20:26:39.3 |
HIP 80992 |
21.74 |
| 2026-10-05 12:00 |
16:33:32.79 |
-20:27:48.7 |
HIP 80992 |
23.30 |
| 2026-10-06 00:00 |
16:33:50.56 |
-20:28:58.0 |
HIP 80992 |
25.52 |
| 2026-10-06 12:00 |
16:34:08.44 |
-20:30:07.3 |
HIP 80992 |
28.25 |
| 2026-10-07 00:00 |
16:34:26.40 |
-20:31:16.5 |
HIP 81287 |
26.78 |
| 2026-10-07 12:00 |
16:34:44.46 |
-20:32:25.8 |
HIP 81287 |
22.49 |
| 2026-10-08 00:00 |
16:35:02.61 |
-20:33:34.9 |
HIP 81287 |
18.22 |
| 2026-10-08 12:00 |
16:35:20.85 |
-20:34:44.0 |
HIP 81287 |
14.02 |
| 2026-10-09 00:00 |
16:35:39.18 |
-20:35:53.1 |
HIP 81287 |
9.99 |
| 2026-10-09 12:00 |
16:35:57.60 |
-20:37:02.0 |
HIP 81287 |
6.51 |
| 2026-10-10 00:00 |
16:36:16.11 |
-20:38:11.0 |
HIP 81287 |
4.99 |
| 2026-10-10 12:00 |
16:36:34.71 |
-20:39:19.8 |
HIP 81287 |
6.91 |
| 2026-10-11 00:00 |
16:36:53.40 |
-20:40:28.6 |
HIP 81287 |
10.56 |