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) |
| 2026-09-20 00:00 |
04:47:21.26 |
+25:01:08.0 |
HIP 22334 |
23.63 |
| 2026-09-20 12:00 |
04:47:20.23 |
+25:01:25.4 |
HIP 22334 |
24.00 |
| 2026-09-21 00:00 |
04:47:19.09 |
+25:01:42.7 |
HIP 22334 |
24.38 |
| 2026-09-21 12:00 |
04:47:17.84 |
+25:01:59.7 |
HIP 22334 |
24.79 |
| 2026-09-22 00:00 |
04:47:16.48 |
+25:02:16.6 |
HIP 22334 |
25.20 |
| 2026-09-22 12:00 |
04:47:15.01 |
+25:02:33.3 |
HIP 22334 |
25.63 |
| 2026-09-23 00:00 |
04:47:13.43 |
+25:02:49.8 |
HIP 22334 |
26.08 |
| 2026-09-23 12:00 |
04:47:11.75 |
+25:03:06.1 |
HIP 22334 |
26.54 |
| 2026-09-24 00:00 |
04:47:09.96 |
+25:03:22.2 |
HIP 22334 |
27.02 |
| 2026-09-24 12:00 |
04:47:08.06 |
+25:03:38.1 |
HIP 22334 |
27.52 |
| 2026-09-25 00:00 |
04:47:06.05 |
+25:03:53.9 |
HIP 22334 |
28.03 |
| 2026-09-25 12:00 |
04:47:03.94 |
+25:04:09.5 |
HIP 22334 |
28.55 |
| 2026-09-26 00:00 |
04:47:01.71 |
+25:04:24.8 |
HIP 22334 |
29.10 |
| 2026-09-26 12:00 |
04:46:59.38 |
+25:04:40.0 |
HIP 22334 |
29.66 |
| 2026-09-27 00:00 |
04:46:56.95 |
+25:04:55.0 |
HIP 22334 |
30.23 |
| 2026-09-27 12:00 |
04:46:54.40 |
+25:05:09.8 |
HIP 22334 |
30.83 |
| 2026-09-28 00:00 |
04:46:51.75 |
+25:05:24.4 |
HIP 22334 |
31.44 |
| 2026-09-28 12:00 |
04:46:48.99 |
+25:05:38.9 |
HIP 22334 |
32.07 |
| 2026-09-29 00:00 |
04:46:46.13 |
+25:05:53.1 |
HIP 22334 |
32.71 |
| 2026-09-29 12:00 |
04:46:43.16 |
+25:06:07.1 |
HIP 22334 |
33.38 |
| 2026-09-30 00:00 |
04:46:40.08 |
+25:06:20.9 |
HIP 22334 |
34.06 |
| 2026-09-30 12:00 |
04:46:36.90 |
+25:06:34.6 |
HIP 22334 |
34.76 |
| 2026-10-01 00:00 |
04:46:33.61 |
+25:06:48.0 |
HIP 22334 |
35.48 |
| 2026-10-01 12:00 |
04:46:30.21 |
+25:07:01.3 |
HIP 22334 |
36.22 |
| 2026-10-02 00:00 |
04:46:26.71 |
+25:07:14.3 |
HIP 22334 |
36.98 |
| 2026-10-02 12:00 |
04:46:23.10 |
+25:07:27.1 |
HIP 22334 |
37.76 |
| 2026-10-03 00:00 |
04:46:19.39 |
+25:07:39.8 |
HIP 22334 |
38.56 |
| 2026-10-03 12:00 |
04:46:15.57 |
+25:07:52.2 |
HIP 22334 |
39.37 |
| 2026-10-04 00:00 |
04:46:11.65 |
+25:08:04.4 |
HIP 22334 |
40.21 |
| 2026-10-04 12:00 |
04:46:07.62 |
+25:08:16.4 |
HIP 22334 |
41.07 |
| 2026-10-05 00:00 |
04:46:03.49 |
+25:08:28.3 |
HIP 22334 |
41.95 |
| 2026-10-05 12:00 |
04:45:59.25 |
+25:08:39.9 |
HIP 22334 |
42.85 |
| 2026-10-06 00:00 |
04:45:54.92 |
+25:08:51.3 |
HIP 22334 |
43.78 |
| 2026-10-06 12:00 |
04:45:50.47 |
+25:09:02.5 |
HIP 22334 |
44.72 |
| 2026-10-07 00:00 |
04:45:45.92 |
+25:09:13.5 |
HIP 22096 |
45.06 |
| 2026-10-07 12:00 |
04:45:41.28 |
+25:09:24.3 |
HIP 22096 |
45.10 |
| 2026-10-08 00:00 |
04:45:36.52 |
+25:09:34.8 |
HIP 22096 |
45.16 |
| 2026-10-08 12:00 |
04:45:31.67 |
+25:09:45.2 |
HIP 22096 |
45.25 |
| 2026-10-09 00:00 |
04:45:26.71 |
+25:09:55.4 |
HIP 22096 |
45.36 |
| 2026-10-09 12:00 |
04:45:21.66 |
+25:10:05.3 |
HIP 22096 |
45.49 |
| 2026-10-10 00:00 |
04:45:16.50 |
+25:10:15.0 |
HIP 22096 |
45.64 |
| 2026-10-10 12:00 |
04:45:11.24 |
+25:10:24.5 |
HIP 22096 |
45.83 |
| 2026-10-11 00:00 |
04:45:05.88 |
+25:10:33.8 |
HIP 22060 |
45.92 |