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) |
| 2026-06-01 00:00 |
11:21:38.25 |
-07:47:43.0 |
HIP 55536 |
21.33 |
| 2026-06-01 12:00 |
11:21:34.98 |
-07:43:25.6 |
HIP 55536 |
25.28 |
| 2026-06-02 00:00 |
11:21:31.87 |
-07:39:09.8 |
HIP 55536 |
29.30 |
| 2026-06-02 12:00 |
11:21:28.93 |
-07:34:55.7 |
HIP 55287 |
31.39 |
| 2026-06-03 00:00 |
11:21:26.15 |
-07:30:43.2 |
HIP 55287 |
30.92 |
| 2026-06-03 12:00 |
11:21:23.54 |
-07:26:32.3 |
HIP 55287 |
31.07 |
| 2026-06-04 00:00 |
11:21:21.09 |
-07:22:23.0 |
HIP 55287 |
31.81 |
| 2026-06-04 12:00 |
11:21:18.81 |
-07:18:15.4 |
HIP 55287 |
33.09 |
| 2026-06-05 00:00 |
11:21:16.68 |
-07:14:09.4 |
HIP 55322 |
30.64 |
| 2026-06-05 12:00 |
11:21:14.72 |
-07:10:05.0 |
HIP 55322 |
27.72 |
| 2026-06-06 00:00 |
11:21:12.92 |
-07:06:02.2 |
HIP 55322 |
25.18 |
| 2026-06-06 12:00 |
11:21:11.28 |
-07:02:01.1 |
HIP 55322 |
23.13 |
| 2026-06-07 00:00 |
11:21:09.80 |
-06:58:01.6 |
HIP 55322 |
21.69 |
| 2026-06-07 12:00 |
11:21:08.48 |
-06:54:03.7 |
HIP 55322 |
20.97 |
| 2026-06-08 00:00 |
11:21:07.32 |
-06:50:07.5 |
HIP 55322 |
21.03 |
| 2026-06-08 12:00 |
11:21:06.31 |
-06:46:12.9 |
HIP 55322 |
21.84 |
| 2026-06-09 00:00 |
11:21:05.47 |
-06:42:19.9 |
HIP 55322 |
23.31 |
| 2026-06-09 12:00 |
11:21:04.78 |
-06:38:28.5 |
HIP 55322 |
25.31 |
| 2026-06-10 00:00 |
11:21:04.24 |
-06:34:38.7 |
HIP 55322 |
27.72 |
| 2026-06-10 12:00 |
11:21:03.87 |
-06:30:50.6 |
HIP 55322 |
30.43 |
| 2026-06-11 00:00 |
11:21:03.64 |
-06:27:04.1 |
HIP 55322 |
33.35 |
| 2026-06-11 12:00 |
11:21:03.57 |
-06:23:19.2 |
HIP 55322 |
36.42 |
| 2026-06-12 00:00 |
11:21:03.66 |
-06:19:35.9 |
HIP 55285 |
34.48 |
| 2026-06-12 12:00 |
11:21:03.90 |
-06:15:54.3 |
HIP 55285 |
32.14 |
| 2026-06-13 00:00 |
11:21:04.29 |
-06:12:14.3 |
HIP 55285 |
30.12 |
| 2026-06-13 12:00 |
11:21:04.83 |
-06:08:35.8 |
HIP 55482 |
27.55 |
| 2026-06-14 00:00 |
11:21:05.52 |
-06:04:59.0 |
HIP 55482 |
24.17 |
| 2026-06-14 12:00 |
11:21:06.36 |
-06:01:23.8 |
HIP 55482 |
20.88 |
| 2026-06-15 00:00 |
11:21:07.36 |
-05:57:50.2 |
HIP 55482 |
17.71 |
| 2026-06-15 12:00 |
11:21:08.50 |
-05:54:18.2 |
HIP 55482 |
14.72 |
| 2026-06-16 00:00 |
11:21:09.78 |
-05:50:47.8 |
HIP 55482 |
12.01 |
| 2026-06-16 12:00 |
11:21:11.22 |
-05:47:18.9 |
HIP 55482 |
9.82 |
| 2026-06-17 00:00 |
11:21:12.80 |
-05:43:51.7 |
HIP 55482 |
8.52 |
| 2026-06-17 12:00 |
11:21:14.53 |
-05:40:26.1 |
HIP 55482 |
8.49 |
| 2026-06-18 00:00 |
11:21:16.40 |
-05:37:02.0 |
HIP 55482 |
9.72 |
| 2026-06-18 12:00 |
11:21:18.41 |
-05:33:39.5 |
HIP 55482 |
11.81 |
| 2026-06-19 00:00 |
11:21:20.57 |
-05:30:18.6 |
HIP 55482 |
14.38 |
| 2026-06-19 12:00 |
11:21:22.87 |
-05:26:59.2 |
HIP 55482 |
17.20 |
| 2026-06-20 00:00 |
11:21:25.31 |
-05:23:41.4 |
HIP 55482 |
20.15 |
| 2026-06-20 12:00 |
11:21:27.88 |
-05:20:25.2 |
HIP 55527 |
17.80 |
| 2026-06-21 00:00 |
11:21:30.60 |
-05:17:10.5 |
HIP 55527 |
15.31 |
| 2026-06-21 12:00 |
11:21:33.46 |
-05:13:57.3 |
HIP 55527 |
13.18 |
| 2026-06-22 00:00 |
11:21:36.45 |
-05:10:45.7 |
HIP 55527 |
11.56 |