メタデータ
| 項目 |
値 |
| Designation |
C/2026 H1 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2026-06-13T09:01:38.988480Z |
| Orbit solution date (soln_date, UTC) |
2026-05-22T14:12:27Z |
| Obs used |
44 |
| NEO |
- |
| M1 |
8.800 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2026-04-19T08:19:12.806400Z |
| Discovery magnitude (MPC) |
20.58 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) |
2026-04-12.0000000 |
| e |
1.00061380 |
| q (au) |
6.083873 |
| a (au) |
-9911.810130 |
| i (deg) |
115.593285 |
| Ω (om, deg) |
178.728002 |
| ω (w, deg) |
349.640276 |
| M (ma, deg) |
-0.000062 |
等級
散乱 + 全体線形
$$
M_a = (5.913 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
5.913 |
| n |
6.000 |
| gf |
0.915 |
| gb |
-0.653 |
| k |
0.930 |
| δ90 |
6.734 |
| 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 |
11:54:26.38 |
-00:26:38.3 |
HIP 58105 |
10.92 |
| 2026-09-20 12:00 |
11:54:41.19 |
-00:25:55.0 |
HIP 58105 |
8.91 |
| 2026-09-21 00:00 |
11:54:55.99 |
-00:25:11.8 |
HIP 58105 |
8.26 |
| 2026-09-21 12:00 |
11:55:10.80 |
-00:24:28.7 |
HIP 58105 |
9.24 |
| 2026-09-22 00:00 |
11:55:25.61 |
-00:23:45.6 |
HIP 58105 |
11.44 |
| 2026-09-22 12:00 |
11:55:40.41 |
-00:23:02.6 |
HIP 58105 |
14.32 |
| 2026-09-23 00:00 |
11:55:55.22 |
-00:22:19.5 |
HIP 58105 |
17.53 |
| 2026-09-23 12:00 |
11:56:10.02 |
-00:21:36.5 |
HIP 58105 |
20.93 |
| 2026-09-24 00:00 |
11:56:24.81 |
-00:20:53.5 |
HIP 58105 |
24.44 |
| 2026-09-24 12:00 |
11:56:39.60 |
-00:20:10.5 |
HIP 58105 |
28.01 |
| 2026-09-25 00:00 |
11:56:54.39 |
-00:19:27.5 |
HIP 58105 |
31.63 |
| 2026-09-25 12:00 |
11:57:09.17 |
-00:18:44.4 |
HIP 58105 |
35.28 |
| 2026-09-26 00:00 |
11:57:23.94 |
-00:18:01.4 |
HIP 58461 |
34.58 |
| 2026-09-26 12:00 |
11:57:38.71 |
-00:17:18.3 |
HIP 58461 |
31.15 |
| 2026-09-27 00:00 |
11:57:53.47 |
-00:16:35.2 |
HIP 58461 |
27.80 |
| 2026-09-27 12:00 |
11:58:08.23 |
-00:15:52.0 |
HIP 58461 |
24.57 |
| 2026-09-28 00:00 |
11:58:22.97 |
-00:15:08.8 |
HIP 58461 |
21.51 |
| 2026-09-28 12:00 |
11:58:37.71 |
-00:14:25.5 |
HIP 58461 |
18.71 |
| 2026-09-29 00:00 |
11:58:52.43 |
-00:13:42.1 |
HIP 58461 |
16.30 |
| 2026-09-29 12:00 |
11:59:07.15 |
-00:12:58.7 |
HIP 58461 |
14.47 |
| 2026-09-30 00:00 |
11:59:21.85 |
-00:12:15.2 |
HIP 58461 |
13.46 |
| 2026-09-30 12:00 |
11:59:36.54 |
-00:11:31.6 |
HIP 58461 |
13.45 |
| 2026-10-01 00:00 |
11:59:51.22 |
-00:10:47.8 |
HIP 58461 |
14.45 |
| 2026-10-01 12:00 |
12:00:05.89 |
-00:10:04.0 |
HIP 58461 |
16.26 |
| 2026-10-02 00:00 |
12:00:20.55 |
-00:09:20.1 |
HIP 58461 |
18.65 |
| 2026-10-02 12:00 |
12:00:35.19 |
-00:08:36.0 |
HIP 58637 |
18.62 |
| 2026-10-03 00:00 |
12:00:49.81 |
-00:07:51.8 |
HIP 58637 |
16.87 |
| 2026-10-03 12:00 |
12:01:04.42 |
-00:07:07.5 |
HIP 58637 |
15.83 |
| 2026-10-04 00:00 |
12:01:19.02 |
-00:06:23.0 |
HIP 58637 |
15.63 |
| 2026-10-04 12:00 |
12:01:33.59 |
-00:05:38.3 |
HIP 58678 |
13.14 |
| 2026-10-05 00:00 |
12:01:48.15 |
-00:04:53.5 |
HIP 58678 |
11.24 |
| 2026-10-05 12:00 |
12:02:02.69 |
-00:04:08.5 |
HIP 58678 |
10.37 |
| 2026-10-06 00:00 |
12:02:17.21 |
-00:03:23.3 |
HIP 58678 |
10.78 |
| 2026-10-06 12:00 |
12:02:31.72 |
-00:02:38.0 |
HIP 58678 |
12.34 |
| 2026-10-07 00:00 |
12:02:46.20 |
-00:01:52.4 |
HIP 58678 |
14.68 |
| 2026-10-07 12:00 |
12:03:00.66 |
-00:01:06.6 |
HIP 58678 |
17.49 |
| 2026-10-08 00:00 |
12:03:15.09 |
-00:00:20.5 |
HIP 58678 |
20.57 |
| 2026-10-08 12:00 |
12:03:29.51 |
+00:00:25.7 |
HIP 58678 |
23.82 |
| 2026-10-09 00:00 |
12:03:43.90 |
+00:01:12.2 |
HIP 58908 |
21.80 |
| 2026-10-09 12:00 |
12:03:58.27 |
+00:01:59.0 |
HIP 58908 |
19.92 |
| 2026-10-10 00:00 |
12:04:12.61 |
+00:02:46.0 |
HIP 58908 |
18.59 |
| 2026-10-10 12:00 |
12:04:26.92 |
+00:03:33.3 |
HIP 58908 |
17.94 |
| 2026-10-11 00:00 |
12:04:41.21 |
+00:04:20.8 |
HIP 58908 |
18.02 |