メタデータ
| 項目 |
値 |
| Designation |
C/2022 JK5 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2023-04-28T20:24:39.856320Z |
| Orbit solution date (soln_date, UTC) |
2024-12-03T17:12:22Z |
| Obs used |
892 |
| NEO |
- |
| M1 |
11.800 |
| K1 |
4.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2023-09-05.0000000 |
| e |
0.93785074 |
| q (au) |
2.687022 |
| a (au) |
43.234983 |
| i (deg) |
16.830858 |
| Ω (om, deg) |
59.651258 |
| ω (w, deg) |
247.170105 |
| M (ma, deg) |
0.447759 |
等級
散乱 + 全体線形
$$
M_a = (13.692 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
13.692 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.768 |
| 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) |
| 2026-03-26 00:00 |
03:45:35.61 |
+21:07:03.2 |
HIP 17552 |
7.80 |
| 2026-03-26 12:00 |
03:45:46.31 |
+21:07:47.4 |
HIP 17552 |
7.77 |
| 2026-03-27 00:00 |
03:45:57.08 |
+21:08:31.7 |
HIP 17552 |
8.58 |
| 2026-03-27 12:00 |
03:46:07.91 |
+21:09:16.2 |
HIP 17552 |
10.04 |
| 2026-03-28 00:00 |
03:46:18.81 |
+21:10:00.9 |
HIP 17552 |
11.92 |
| 2026-03-28 12:00 |
03:46:29.78 |
+21:10:45.7 |
HIP 17552 |
14.07 |
| 2026-03-29 00:00 |
03:46:40.81 |
+21:11:30.7 |
HIP 17552 |
16.38 |
| 2026-03-29 12:00 |
03:46:51.90 |
+21:12:15.8 |
HIP 17552 |
18.80 |
| 2026-03-30 00:00 |
03:47:03.06 |
+21:13:01.1 |
HIP 17763 |
17.11 |
| 2026-03-30 12:00 |
03:47:14.28 |
+21:13:46.5 |
HIP 17763 |
14.41 |
| 2026-03-31 00:00 |
03:47:25.56 |
+21:14:32.1 |
HIP 17763 |
11.71 |
| 2026-03-31 12:00 |
03:47:36.90 |
+21:15:17.8 |
HIP 17763 |
9.02 |
| 2026-04-01 00:00 |
03:47:48.31 |
+21:16:03.6 |
HIP 17763 |
6.37 |
| 2026-04-01 12:00 |
03:47:59.78 |
+21:16:49.6 |
HIP 17763 |
3.86 |
| 2026-04-02 00:00 |
03:48:11.30 |
+21:17:35.8 |
HIP 17763 |
2.16 |
| 2026-04-02 12:00 |
03:48:22.89 |
+21:18:22.0 |
HIP 17763 |
3.18 |
| 2026-04-03 00:00 |
03:48:34.53 |
+21:19:08.4 |
HIP 17763 |
5.61 |
| 2026-04-03 12:00 |
03:48:46.23 |
+21:19:54.9 |
HIP 17837 |
3.31 |
| 2026-04-04 00:00 |
03:48:57.99 |
+21:20:41.5 |
HIP 17837 |
0.54 |
| 2026-04-04 12:00 |
03:49:09.81 |
+21:21:28.3 |
HIP 17837 |
2.42 |
| 2026-04-05 00:00 |
03:49:21.68 |
+21:22:15.2 |
HIP 17837 |
5.29 |
| 2026-04-05 12:00 |
03:49:33.61 |
+21:23:02.2 |
HIP 17837 |
8.17 |
| 2026-04-06 00:00 |
03:49:45.59 |
+21:23:49.3 |
HIP 17837 |
11.07 |
| 2026-04-06 12:00 |
03:49:57.63 |
+21:24:36.5 |
HIP 17837 |
13.98 |
| 2026-04-07 00:00 |
03:50:09.72 |
+21:25:23.9 |
HIP 17909 |
16.62 |
| 2026-04-07 12:00 |
03:50:21.87 |
+21:26:11.3 |
HIP 17909 |
18.42 |
| 2026-04-08 00:00 |
03:50:34.07 |
+21:26:58.9 |
HIP 17909 |
20.49 |
| 2026-04-08 12:00 |
03:50:46.32 |
+21:27:46.5 |
HIP 17909 |
22.76 |
| 2026-04-09 00:00 |
03:50:58.62 |
+21:28:34.3 |
HIP 17909 |
25.19 |
| 2026-04-09 12:00 |
03:51:10.97 |
+21:29:22.2 |
HIP 17909 |
27.73 |
| 2026-04-10 00:00 |
03:51:23.38 |
+21:30:10.1 |
HIP 17909 |
30.36 |
| 2026-04-10 12:00 |
03:51:35.83 |
+21:30:58.2 |
HIP 18059 |
30.92 |
| 2026-04-11 00:00 |
03:51:48.34 |
+21:31:46.4 |
HIP 18059 |
30.24 |
| 2026-04-11 12:00 |
03:52:00.89 |
+21:32:34.6 |
HIP 18059 |
29.85 |
| 2026-04-12 00:00 |
03:52:13.49 |
+21:33:23.0 |
HIP 18059 |
29.76 |
| 2026-04-12 12:00 |
03:52:26.14 |
+21:34:11.4 |
HIP 18059 |
29.99 |
| 2026-04-13 00:00 |
03:52:38.83 |
+21:34:59.9 |
HIP 18266 |
27.88 |
| 2026-04-13 12:00 |
03:52:51.58 |
+21:35:48.5 |
HIP 18266 |
25.60 |
| 2026-04-14 00:00 |
03:53:04.36 |
+21:36:37.2 |
HIP 18266 |
23.49 |
| 2026-04-14 12:00 |
03:53:17.20 |
+21:37:25.9 |
HIP 18266 |
21.61 |
| 2026-04-15 00:00 |
03:53:30.08 |
+21:38:14.7 |
HIP 18266 |
20.03 |
| 2026-04-15 12:00 |
03:53:43.00 |
+21:39:03.7 |
HIP 18266 |
18.82 |
| 2026-04-16 00:00 |
03:53:55.96 |
+21:39:52.6 |
HIP 18266 |
18.07 |