メタデータ
| 項目 |
値 |
| Designation |
C/2026 J1 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2026-06-30T08:37:34.147200Z |
| Orbit solution date (soln_date, UTC) |
2026-07-28T14:12:18Z |
| Obs used |
392 |
| NEO |
- |
| M1 |
13.500 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2026-05-14T13:38:37.622400Z |
| Discovery magnitude (MPC) |
20.48 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) |
2026-06-09.0000000 |
| e |
0.90099918 |
| q (au) |
2.523696 |
| a (au) |
25.491666 |
| i (deg) |
73.115390 |
| Ω (om, deg) |
100.356366 |
| ω (w, deg) |
129.520537 |
| M (ma, deg) |
359.836433 |
等級
散乱 + 全体線形
$$
M_a = (13.807 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
13.807 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.800 |
| δ90 |
10.000 |
| 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) |
| 2026-07-29 00:00 |
16:27:45.05 |
+28:34:25.0 |
HIP 80487 |
28.56 |
| 2026-07-29 12:00 |
16:27:35.73 |
+28:15:36.7 |
HIP 80551 |
32.00 |
| 2026-07-30 00:00 |
16:27:26.90 |
+27:56:48.7 |
HIP 80551 |
14.50 |
| 2026-07-30 12:00 |
16:27:18.57 |
+27:38:01.0 |
HIP 80551 |
10.61 |
| 2026-07-31 00:00 |
16:27:10.72 |
+27:19:13.7 |
HIP 80594 |
26.13 |
| 2026-07-31 12:00 |
16:27:03.35 |
+27:00:26.9 |
HIP 80594 |
8.05 |
| 2026-08-01 00:00 |
16:26:56.47 |
+26:41:40.8 |
HIP 80594 |
12.49 |
| 2026-08-01 12:00 |
16:26:50.06 |
+26:22:55.5 |
HIP 80500 |
19.01 |
| 2026-08-02 00:00 |
16:26:44.12 |
+26:04:11.0 |
HIP 80500 |
11.81 |
| 2026-08-02 12:00 |
16:26:38.65 |
+25:45:27.5 |
HIP 80641 |
21.85 |
| 2026-08-03 00:00 |
16:26:33.64 |
+25:26:45.2 |
HIP 80601 |
17.81 |
| 2026-08-03 12:00 |
16:26:29.10 |
+25:08:04.0 |
HIP 80471 |
13.67 |
| 2026-08-04 00:00 |
16:26:25.00 |
+24:49:24.1 |
HIP 80476 |
19.21 |
| 2026-08-04 12:00 |
16:26:21.36 |
+24:30:45.7 |
HIP 80476 |
10.23 |
| 2026-08-05 00:00 |
16:26:18.17 |
+24:12:08.7 |
HIP 80435 |
18.50 |
| 2026-08-05 12:00 |
16:26:15.42 |
+23:53:33.3 |
HIP 80435 |
18.52 |
| 2026-08-06 00:00 |
16:26:13.12 |
+23:34:59.7 |
HIP 80523 |
31.13 |
| 2026-08-06 12:00 |
16:26:11.25 |
+23:16:27.9 |
HIP 80523 |
12.68 |
| 2026-08-07 00:00 |
16:26:09.81 |
+22:57:57.9 |
HIP 80523 |
6.20 |
| 2026-08-07 12:00 |
16:26:08.81 |
+22:39:29.9 |
HIP 80523 |
24.47 |
| 2026-08-08 00:00 |
16:26:08.23 |
+22:21:04.1 |
HIP 80406 |
19.28 |
| 2026-08-08 12:00 |
16:26:08.07 |
+22:02:40.3 |
HIP 80406 |
27.93 |
| 2026-08-09 00:00 |
16:26:08.33 |
+21:44:18.9 |
HIP 80639 |
25.07 |
| 2026-08-09 12:00 |
16:26:09.01 |
+21:25:59.8 |
HIP 80602 |
21.82 |
| 2026-08-10 00:00 |
16:26:10.11 |
+21:07:43.1 |
HIP 80602 |
18.53 |
| 2026-08-10 12:00 |
16:26:11.61 |
+20:49:29.0 |
HIP 80622 |
21.57 |
| 2026-08-11 00:00 |
16:26:13.51 |
+20:31:17.4 |
HIP 80604 |
19.78 |
| 2026-08-11 12:00 |
16:26:15.82 |
+20:13:08.6 |
HIP 80604 |
19.52 |
| 2026-08-12 00:00 |
16:26:18.53 |
+19:55:02.5 |
HIP 80604 |
32.00 |
| 2026-08-12 12:00 |
16:26:21.64 |
+19:36:59.2 |
HIP 80573 |
17.96 |
| 2026-08-13 00:00 |
16:26:25.13 |
+19:18:58.9 |
HIP 80573 |
9.72 |
| 2026-08-13 12:00 |
16:26:29.02 |
+19:01:01.6 |
HIP 80584 |
10.32 |
| 2026-08-14 00:00 |
16:26:33.28 |
+18:43:07.3 |
HIP 80488 |
15.04 |
| 2026-08-14 12:00 |
16:26:37.94 |
+18:25:16.2 |
HIP 80536 |
1.93 |
| 2026-08-15 00:00 |
16:26:42.96 |
+18:07:28.4 |
HIP 80499 |
14.00 |
| 2026-08-15 12:00 |
16:26:48.36 |
+17:49:43.8 |
HIP 80662 |
27.79 |
| 2026-08-16 00:00 |
16:26:54.14 |
+17:32:02.5 |
HIP 80662 |
17.85 |
| 2026-08-16 12:00 |
16:27:00.28 |
+17:14:24.7 |
HIP 80662 |
22.12 |
| 2026-08-17 00:00 |
16:27:06.78 |
+16:56:50.4 |
HIP 80701 |
24.32 |
| 2026-08-17 12:00 |
16:27:13.64 |
+16:39:19.5 |
HIP 80701 |
20.74 |
| 2026-08-18 00:00 |
16:27:20.85 |
+16:21:52.3 |
HIP 80555 |
13.80 |
| 2026-08-18 12:00 |
16:27:28.42 |
+16:04:28.8 |
HIP 80555 |
11.02 |
| 2026-08-19 00:00 |
16:27:36.34 |
+15:47:08.9 |
HIP 80657 |
6.73 |