メタデータ
| 項目 |
値 |
| Designation |
P/2024 J1 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2023-11-11T02:06:45.757440Z |
| Orbit solution date (soln_date, UTC) |
2025-01-14T17:42:19Z |
| Obs used |
33 |
| NEO |
- |
| M1 |
14.500 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-05-01T07:34:25.766400Z |
| Discovery magnitude (MPC) |
20.82 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2024-05-01.0000000 |
| e |
0.30729596 |
| q (au) |
2.637543 |
| a (au) |
3.807605 |
| i (deg) |
13.160370 |
| Ω (om, deg) |
321.961732 |
| ω (w, deg) |
200.324508 |
| M (ma, deg) |
22.805121 |
等級
散乱 + 全体線形
$$
M_a = (15.841 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
15.841 |
| n |
2.000 |
| gf |
0.996 |
| gb |
-0.503 |
| k |
1.000 |
| δ90 |
9.999 |
| 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) |
| 2026-09-20 00:00 |
20:50:17.67 |
-18:39:02.7 |
HIP 102726 |
29.23 |
| 2026-09-20 12:00 |
20:50:08.47 |
-18:38:54.4 |
HIP 102726 |
27.96 |
| 2026-09-21 00:00 |
20:49:59.48 |
-18:38:45.3 |
HIP 102726 |
26.85 |
| 2026-09-21 12:00 |
20:49:50.70 |
-18:38:35.5 |
HIP 102726 |
25.91 |
| 2026-09-22 00:00 |
20:49:42.13 |
-18:38:24.8 |
HIP 102726 |
25.14 |
| 2026-09-22 12:00 |
20:49:33.78 |
-18:38:13.4 |
HIP 102726 |
24.54 |
| 2026-09-23 00:00 |
20:49:25.65 |
-18:38:01.2 |
HIP 102726 |
24.11 |
| 2026-09-23 12:00 |
20:49:17.73 |
-18:37:48.3 |
HIP 102726 |
23.86 |
| 2026-09-24 00:00 |
20:49:10.03 |
-18:37:34.6 |
HIP 102726 |
23.78 |
| 2026-09-24 12:00 |
20:49:02.54 |
-18:37:20.2 |
HIP 102587 |
23.60 |
| 2026-09-25 00:00 |
20:48:55.27 |
-18:37:04.9 |
HIP 102587 |
21.88 |
| 2026-09-25 12:00 |
20:48:48.22 |
-18:36:49.0 |
HIP 102587 |
20.22 |
| 2026-09-26 00:00 |
20:48:41.39 |
-18:36:32.2 |
HIP 102587 |
18.61 |
| 2026-09-26 12:00 |
20:48:34.78 |
-18:36:14.7 |
HIP 102587 |
17.06 |
| 2026-09-27 00:00 |
20:48:28.38 |
-18:35:56.5 |
HIP 102587 |
15.57 |
| 2026-09-27 12:00 |
20:48:22.20 |
-18:35:37.5 |
HIP 102587 |
14.14 |
| 2026-09-28 00:00 |
20:48:16.25 |
-18:35:17.7 |
HIP 102587 |
12.79 |
| 2026-09-28 12:00 |
20:48:10.51 |
-18:34:57.2 |
HIP 102587 |
11.51 |
| 2026-09-29 00:00 |
20:48:04.99 |
-18:34:35.9 |
HIP 102587 |
10.32 |
| 2026-09-29 12:00 |
20:47:59.69 |
-18:34:13.9 |
HIP 102587 |
9.23 |
| 2026-09-30 00:00 |
20:47:54.61 |
-18:33:51.2 |
HIP 102587 |
8.25 |
| 2026-09-30 12:00 |
20:47:49.75 |
-18:33:27.7 |
HIP 102587 |
7.41 |
| 2026-10-01 00:00 |
20:47:45.12 |
-18:33:03.5 |
HIP 102587 |
6.74 |
| 2026-10-01 12:00 |
20:47:40.70 |
-18:32:38.5 |
HIP 102587 |
6.26 |
| 2026-10-02 00:00 |
20:47:36.50 |
-18:32:12.8 |
HIP 102587 |
5.99 |
| 2026-10-02 12:00 |
20:47:32.53 |
-18:31:46.3 |
HIP 102587 |
5.95 |
| 2026-10-03 00:00 |
20:47:28.78 |
-18:31:19.1 |
HIP 102587 |
6.11 |
| 2026-10-03 12:00 |
20:47:25.24 |
-18:30:51.1 |
HIP 102587 |
6.44 |
| 2026-10-04 00:00 |
20:47:21.93 |
-18:30:22.4 |
HIP 102587 |
6.90 |
| 2026-10-04 12:00 |
20:47:18.85 |
-18:29:53.0 |
HIP 102587 |
7.45 |
| 2026-10-05 00:00 |
20:47:15.98 |
-18:29:22.8 |
HIP 102587 |
8.06 |
| 2026-10-05 12:00 |
20:47:13.33 |
-18:28:51.9 |
HIP 102587 |
8.70 |
| 2026-10-06 00:00 |
20:47:10.91 |
-18:28:20.3 |
HIP 102587 |
9.37 |
| 2026-10-06 12:00 |
20:47:08.71 |
-18:27:47.9 |
HIP 102587 |
10.05 |
| 2026-10-07 00:00 |
20:47:06.73 |
-18:27:14.8 |
HIP 102587 |
10.73 |
| 2026-10-07 12:00 |
20:47:04.97 |
-18:26:40.9 |
HIP 102587 |
11.41 |
| 2026-10-08 00:00 |
20:47:03.44 |
-18:26:06.3 |
HIP 102587 |
12.08 |
| 2026-10-08 12:00 |
20:47:02.12 |
-18:25:31.0 |
HIP 102587 |
12.74 |
| 2026-10-09 00:00 |
20:47:01.03 |
-18:24:55.0 |
HIP 102587 |
13.40 |
| 2026-10-09 12:00 |
20:47:00.16 |
-18:24:18.2 |
HIP 102587 |
14.04 |
| 2026-10-10 00:00 |
20:46:59.51 |
-18:23:40.7 |
HIP 102587 |
14.68 |
| 2026-10-10 12:00 |
20:46:59.08 |
-18:23:02.4 |
HIP 102587 |
15.31 |
| 2026-10-11 00:00 |
20:46:58.87 |
-18:22:23.4 |
HIP 102587 |
15.93 |