メタデータ
| 項目 |
値 |
| Designation |
C/2022 H1 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2024-01-19T11:06:56.177280Z |
| Orbit solution date (soln_date, UTC) |
2025-06-26T10:12:45Z |
| Obs used |
74 |
| NEO |
- |
| M1 |
10.200 |
| K1 |
5.750 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2022-04-21T08:36:18.201600Z |
| Discovery magnitude (MPC) |
20.66 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) |
2022-09-07.0000000 |
| e |
0.99347679 |
| q (au) |
7.689370 |
| a (au) |
1178.770272 |
| i (deg) |
49.866897 |
| Ω (om, deg) |
6.365450 |
| ω (w, deg) |
246.327042 |
| M (ma, deg) |
359.987836 |
等級
散乱 + 全体線形
$$
M_a = (6.290 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
6.290 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.833 |
| 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) |
| 2026-06-01 00:00 |
23:09:58.98 |
-55:49:06.0 |
HIP 114188 |
22.62 |
| 2026-06-01 12:00 |
23:10:04.83 |
-55:50:14.7 |
HIP 114188 |
23.03 |
| 2026-06-02 00:00 |
23:10:10.51 |
-55:51:24.1 |
HIP 114188 |
23.49 |
| 2026-06-02 12:00 |
23:10:16.02 |
-55:52:34.0 |
HIP 114188 |
24.00 |
| 2026-06-03 00:00 |
23:10:21.37 |
-55:53:44.4 |
HIP 114188 |
24.55 |
| 2026-06-03 12:00 |
23:10:26.54 |
-55:54:55.4 |
HIP 114518 |
24.20 |
| 2026-06-04 00:00 |
23:10:31.55 |
-55:56:06.9 |
HIP 114518 |
22.82 |
| 2026-06-04 12:00 |
23:10:36.39 |
-55:57:19.0 |
HIP 114518 |
21.45 |
| 2026-06-05 00:00 |
23:10:41.05 |
-55:58:31.6 |
HIP 114518 |
20.08 |
| 2026-06-05 12:00 |
23:10:45.55 |
-55:59:44.7 |
HIP 114518 |
18.71 |
| 2026-06-06 00:00 |
23:10:49.87 |
-56:00:58.3 |
HIP 114518 |
17.34 |
| 2026-06-06 12:00 |
23:10:54.02 |
-56:02:12.4 |
HIP 114518 |
15.97 |
| 2026-06-07 00:00 |
23:10:57.99 |
-56:03:27.0 |
HIP 114518 |
14.61 |
| 2026-06-07 12:00 |
23:11:01.79 |
-56:04:42.1 |
HIP 114518 |
13.25 |
| 2026-06-08 00:00 |
23:11:05.42 |
-56:05:57.6 |
HIP 114518 |
11.90 |
| 2026-06-08 12:00 |
23:11:08.87 |
-56:07:13.6 |
HIP 114518 |
10.55 |
| 2026-06-09 00:00 |
23:11:12.15 |
-56:08:30.1 |
HIP 114518 |
9.21 |
| 2026-06-09 12:00 |
23:11:15.25 |
-56:09:46.9 |
HIP 114518 |
7.87 |
| 2026-06-10 00:00 |
23:11:18.18 |
-56:11:04.3 |
HIP 114518 |
6.55 |
| 2026-06-10 12:00 |
23:11:20.93 |
-56:12:22.0 |
HIP 114518 |
5.25 |
| 2026-06-11 00:00 |
23:11:23.50 |
-56:13:40.2 |
HIP 114518 |
3.99 |
| 2026-06-11 12:00 |
23:11:25.89 |
-56:14:58.7 |
HIP 114518 |
2.84 |
| 2026-06-12 00:00 |
23:11:28.10 |
-56:16:17.7 |
HIP 114518 |
1.99 |
| 2026-06-12 12:00 |
23:11:30.13 |
-56:17:37.0 |
HIP 114518 |
1.89 |
| 2026-06-13 00:00 |
23:11:31.99 |
-56:18:56.7 |
HIP 114518 |
2.64 |
| 2026-06-13 12:00 |
23:11:33.66 |
-56:20:16.8 |
HIP 114518 |
3.76 |
| 2026-06-14 00:00 |
23:11:35.16 |
-56:21:37.2 |
HIP 114518 |
5.00 |
| 2026-06-14 12:00 |
23:11:36.47 |
-56:22:57.9 |
HIP 114518 |
6.30 |
| 2026-06-15 00:00 |
23:11:37.60 |
-56:24:18.9 |
HIP 114518 |
7.63 |
| 2026-06-15 12:00 |
23:11:38.55 |
-56:25:40.3 |
HIP 114518 |
8.98 |
| 2026-06-16 00:00 |
23:11:39.32 |
-56:27:02.0 |
HIP 114518 |
10.33 |
| 2026-06-16 12:00 |
23:11:39.90 |
-56:28:23.9 |
HIP 114518 |
11.69 |
| 2026-06-17 00:00 |
23:11:40.30 |
-56:29:46.1 |
HIP 114518 |
13.06 |
| 2026-06-17 12:00 |
23:11:40.52 |
-56:31:08.6 |
HIP 114518 |
14.43 |
| 2026-06-18 00:00 |
23:11:40.56 |
-56:32:31.3 |
HIP 114518 |
15.81 |
| 2026-06-18 12:00 |
23:11:40.41 |
-56:33:54.2 |
HIP 114518 |
17.20 |
| 2026-06-19 00:00 |
23:11:40.09 |
-56:35:17.4 |
HIP 114518 |
18.58 |
| 2026-06-19 12:00 |
23:11:39.57 |
-56:36:40.8 |
HIP 114518 |
19.97 |
| 2026-06-20 00:00 |
23:11:38.88 |
-56:38:04.3 |
HIP 114518 |
21.37 |
| 2026-06-20 12:00 |
23:11:38.00 |
-56:39:28.1 |
HIP 114518 |
22.77 |
| 2026-06-21 00:00 |
23:11:36.94 |
-56:40:52.0 |
HIP 114716 |
23.94 |
| 2026-06-21 12:00 |
23:11:35.69 |
-56:42:16.1 |
HIP 114716 |
23.55 |
| 2026-06-22 00:00 |
23:11:34.27 |
-56:43:40.3 |
HIP 114716 |
23.25 |