C/2022 JK5 (PANSTARRS)
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) |
| 2026-02-03 00:00 |
03:35:11.92 |
+20:13:52.4 |
HIP 16662 |
13.89 |
| 2026-02-03 12:00 |
03:35:12.61 |
+20:14:07.4 |
HIP 16662 |
13.86 |
| 2026-02-04 00:00 |
03:35:13.42 |
+20:14:22.8 |
HIP 16662 |
13.87 |
| 2026-02-04 12:00 |
03:35:14.35 |
+20:14:38.5 |
HIP 16662 |
13.89 |
| 2026-02-05 00:00 |
03:35:15.41 |
+20:14:54.6 |
HIP 16662 |
13.95 |
| 2026-02-05 12:00 |
03:35:16.58 |
+20:15:11.1 |
HIP 16662 |
14.04 |
| 2026-02-06 00:00 |
03:35:17.88 |
+20:15:28.0 |
HIP 16662 |
14.16 |
| 2026-02-06 12:00 |
03:35:19.29 |
+20:15:45.2 |
HIP 16662 |
14.31 |
| 2026-02-07 00:00 |
03:35:20.82 |
+20:16:02.8 |
HIP 16662 |
14.50 |
| 2026-02-07 12:00 |
03:35:22.48 |
+20:16:20.7 |
HIP 16662 |
14.72 |
| 2026-02-08 00:00 |
03:35:24.25 |
+20:16:39.0 |
HIP 16662 |
14.98 |
| 2026-02-08 12:00 |
03:35:26.14 |
+20:16:57.7 |
HIP 16662 |
15.28 |
| 2026-02-09 00:00 |
03:35:28.15 |
+20:17:16.7 |
HIP 16662 |
15.61 |
| 2026-02-09 12:00 |
03:35:30.28 |
+20:17:36.1 |
HIP 16662 |
15.98 |
| 2026-02-10 00:00 |
03:35:32.53 |
+20:17:55.9 |
HIP 16662 |
16.39 |
| 2026-02-10 12:00 |
03:35:34.89 |
+20:18:16.1 |
HIP 16662 |
16.83 |
| 2026-02-11 00:00 |
03:35:37.37 |
+20:18:36.6 |
HIP 16662 |
17.32 |
| 2026-02-11 12:00 |
03:35:39.97 |
+20:18:57.4 |
HIP 16662 |
17.84 |
| 2026-02-12 00:00 |
03:35:42.69 |
+20:19:18.6 |
HIP 16813 |
18.10 |
| 2026-02-12 12:00 |
03:35:45.52 |
+20:19:40.2 |
HIP 16813 |
18.06 |
| 2026-02-13 00:00 |
03:35:48.47 |
+20:20:02.1 |
HIP 16813 |
18.05 |
| 2026-02-13 12:00 |
03:35:51.53 |
+20:20:24.4 |
HIP 16813 |
18.06 |
| 2026-02-14 00:00 |
03:35:54.71 |
+20:20:47.0 |
HIP 16813 |
18.10 |
| 2026-02-14 12:00 |
03:35:58.00 |
+20:21:10.0 |
HIP 16813 |
18.18 |
| 2026-02-15 00:00 |
03:36:01.41 |
+20:21:33.4 |
HIP 16813 |
18.30 |
| 2026-02-15 12:00 |
03:36:04.93 |
+20:21:57.1 |
HIP 16813 |
18.45 |
| 2026-02-16 00:00 |
03:36:08.57 |
+20:22:21.1 |
HIP 16813 |
18.66 |
| 2026-02-16 12:00 |
03:36:12.32 |
+20:22:45.5 |
HIP 16813 |
18.90 |
| 2026-02-17 00:00 |
03:36:16.18 |
+20:23:10.2 |
HIP 16813 |
19.20 |
| 2026-02-17 12:00 |
03:36:20.15 |
+20:23:35.3 |
HIP 16813 |
19.55 |
| 2026-02-18 00:00 |
03:36:24.24 |
+20:24:00.7 |
HIP 16813 |
19.95 |
| 2026-02-18 12:00 |
03:36:28.43 |
+20:24:26.5 |
HIP 16813 |
20.40 |
| 2026-02-19 00:00 |
03:36:32.74 |
+20:24:52.6 |
HIP 16813 |
20.91 |
| 2026-02-19 12:00 |
03:36:37.16 |
+20:25:19.0 |
HIP 16813 |
21.47 |
| 2026-02-20 00:00 |
03:36:41.69 |
+20:25:45.8 |
HIP 16813 |
22.08 |
| 2026-02-20 12:00 |
03:36:46.33 |
+20:26:12.8 |
HIP 16950 |
22.07 |
| 2026-02-21 00:00 |
03:36:51.08 |
+20:26:40.3 |
HIP 16950 |
21.41 |
| 2026-02-21 12:00 |
03:36:55.93 |
+20:27:08.0 |
HIP 16950 |
20.79 |
| 2026-02-22 00:00 |
03:37:00.89 |
+20:27:36.1 |
HIP 16950 |
20.21 |
| 2026-02-22 12:00 |
03:37:05.96 |
+20:28:04.5 |
HIP 16950 |
19.68 |
| 2026-02-23 00:00 |
03:37:11.14 |
+20:28:33.2 |
HIP 16950 |
19.21 |
| 2026-02-23 12:00 |
03:37:16.42 |
+20:29:02.2 |
HIP 16950 |
18.81 |
| 2026-02-24 00:00 |
03:37:21.81 |
+20:29:31.6 |
HIP 16950 |
18.48 |