メタデータ
| 項目 |
値 |
| Designation |
C/2022 J2 (Bok) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2022-10-27T01:33:00.308160Z |
| Orbit solution date (soln_date, UTC) |
2023-06-01T23:12:41Z |
| Obs used |
135 |
| NEO |
- |
| M1 |
15.600 |
| K1 |
10.750 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2022-05-09T04:30:45.273600Z |
| Discovery magnitude (MPC) |
21.56 G |
| Discovery observatory (MPC) |
V00 · Kitt Peak-Bok |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2022-07-28.0000000 |
| e |
0.98023028 |
| q (au) |
1.827561 |
| a (au) |
92.442404 |
| i (deg) |
149.092718 |
| Ω (om, deg) |
252.557091 |
| ω (w, deg) |
133.064666 |
| M (ma, deg) |
359.899017 |
等級
散乱 + 全体線形
$$
M_a = (15.303 + 4.447\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
15.303 |
| n |
4.447 |
| gf |
0.800 |
| gb |
-0.500 |
| k |
0.958 |
| δ90 |
1.000 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
00:22:48.04 |
-31:01:12.8 |
HIP 1830 |
5.34 |
| 2026-06-01 12:00 |
00:22:50.82 |
-31:02:21.6 |
HIP 1830 |
4.67 |
| 2026-06-02 00:00 |
00:22:53.53 |
-31:03:31.2 |
HIP 1830 |
4.31 |
| 2026-06-02 12:00 |
00:22:56.16 |
-31:04:41.4 |
HIP 1830 |
4.34 |
| 2026-06-03 00:00 |
00:22:58.71 |
-31:05:52.4 |
HIP 1830 |
4.77 |
| 2026-06-03 12:00 |
00:23:01.18 |
-31:07:04.1 |
HIP 1830 |
5.50 |
| 2026-06-04 00:00 |
00:23:03.57 |
-31:08:16.5 |
HIP 1830 |
6.43 |
| 2026-06-04 12:00 |
00:23:05.87 |
-31:09:29.7 |
HIP 1830 |
7.49 |
| 2026-06-05 00:00 |
00:23:08.10 |
-31:10:43.5 |
HIP 1830 |
8.63 |
| 2026-06-05 12:00 |
00:23:10.24 |
-31:11:58.1 |
HIP 1830 |
9.83 |
| 2026-06-06 00:00 |
00:23:12.30 |
-31:13:13.4 |
HIP 1830 |
11.08 |
| 2026-06-06 12:00 |
00:23:14.28 |
-31:14:29.4 |
HIP 1830 |
12.35 |
| 2026-06-07 00:00 |
00:23:16.17 |
-31:15:46.1 |
HIP 1830 |
13.64 |
| 2026-06-07 12:00 |
00:23:17.98 |
-31:17:03.5 |
HIP 1830 |
14.96 |
| 2026-06-08 00:00 |
00:23:19.70 |
-31:18:21.6 |
HIP 1830 |
16.28 |
| 2026-06-08 12:00 |
00:23:21.34 |
-31:19:40.4 |
HIP 1830 |
17.63 |
| 2026-06-09 00:00 |
00:23:22.90 |
-31:21:00.0 |
HIP 1734 |
18.85 |
| 2026-06-09 12:00 |
00:23:24.37 |
-31:22:20.1 |
HIP 1734 |
18.96 |
| 2026-06-10 00:00 |
00:23:25.75 |
-31:23:41.0 |
HIP 1734 |
19.16 |
| 2026-06-10 12:00 |
00:23:27.05 |
-31:25:02.5 |
HIP 1734 |
19.44 |
| 2026-06-11 00:00 |
00:23:28.26 |
-31:26:24.7 |
HIP 1789 |
18.39 |
| 2026-06-11 12:00 |
00:23:29.38 |
-31:27:47.7 |
HIP 1789 |
17.34 |
| 2026-06-12 00:00 |
00:23:30.42 |
-31:29:11.2 |
HIP 1789 |
16.32 |
| 2026-06-12 12:00 |
00:23:31.37 |
-31:30:35.5 |
HIP 1789 |
15.34 |
| 2026-06-13 00:00 |
00:23:32.23 |
-31:32:00.4 |
HIP 1789 |
14.41 |
| 2026-06-13 12:00 |
00:23:33.00 |
-31:33:26.0 |
HIP 1789 |
13.55 |
| 2026-06-14 00:00 |
00:23:33.68 |
-31:34:52.2 |
HIP 1789 |
12.77 |
| 2026-06-14 12:00 |
00:23:34.27 |
-31:36:19.1 |
HIP 1789 |
12.09 |
| 2026-06-15 00:00 |
00:23:34.77 |
-31:37:46.7 |
HIP 1789 |
11.53 |
| 2026-06-15 12:00 |
00:23:35.18 |
-31:39:14.8 |
HIP 1789 |
11.12 |
| 2026-06-16 00:00 |
00:23:35.50 |
-31:40:43.7 |
HIP 1789 |
10.87 |
| 2026-06-16 12:00 |
00:23:35.72 |
-31:42:13.1 |
HIP 1789 |
10.80 |
| 2026-06-17 00:00 |
00:23:35.86 |
-31:43:43.2 |
HIP 1789 |
10.92 |
| 2026-06-17 12:00 |
00:23:35.90 |
-31:45:13.9 |
HIP 1789 |
11.22 |
| 2026-06-18 00:00 |
00:23:35.86 |
-31:46:45.2 |
HIP 1789 |
11.70 |
| 2026-06-18 12:00 |
00:23:35.72 |
-31:48:17.1 |
HIP 1789 |
12.33 |
| 2026-06-19 00:00 |
00:23:35.48 |
-31:49:49.7 |
HIP 1789 |
13.10 |
| 2026-06-19 12:00 |
00:23:35.16 |
-31:51:22.8 |
HIP 1789 |
14.00 |
| 2026-06-20 00:00 |
00:23:34.74 |
-31:52:56.5 |
HIP 1789 |
14.99 |
| 2026-06-20 12:00 |
00:23:34.23 |
-31:54:30.8 |
HIP 1789 |
16.07 |
| 2026-06-21 00:00 |
00:23:33.62 |
-31:56:05.7 |
HIP 1789 |
17.22 |
| 2026-06-21 12:00 |
00:23:32.92 |
-31:57:41.2 |
HIP 1789 |
18.44 |
| 2026-06-22 00:00 |
00:23:32.13 |
-31:59:17.2 |
HIP 1789 |
19.70 |