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) |
| 2026-03-26 00:00 |
00:07:55.18 |
-30:23:38.8 |
HIP 585 |
14.32 |
| 2026-03-26 12:00 |
00:08:04.07 |
-30:23:06.2 |
HIP 585 |
16.10 |
| 2026-03-27 00:00 |
00:08:12.96 |
-30:22:34.4 |
HIP 585 |
17.91 |
| 2026-03-27 12:00 |
00:08:21.83 |
-30:22:03.2 |
HIP 686 |
17.98 |
| 2026-03-28 00:00 |
00:08:30.69 |
-30:21:32.7 |
HIP 686 |
17.45 |
| 2026-03-28 12:00 |
00:08:39.55 |
-30:21:02.9 |
HIP 686 |
17.15 |
| 2026-03-29 00:00 |
00:08:48.39 |
-30:20:33.8 |
HIP 686 |
17.08 |
| 2026-03-29 12:00 |
00:08:57.22 |
-30:20:05.3 |
HIP 686 |
17.25 |
| 2026-03-30 00:00 |
00:09:06.04 |
-30:19:37.5 |
HIP 686 |
17.65 |
| 2026-03-30 12:00 |
00:09:14.84 |
-30:19:10.4 |
HIP 850 |
18.02 |
| 2026-03-31 00:00 |
00:09:23.64 |
-30:18:43.9 |
HIP 850 |
16.71 |
| 2026-03-31 12:00 |
00:09:32.41 |
-30:18:18.2 |
HIP 850 |
15.52 |
| 2026-04-01 00:00 |
00:09:41.18 |
-30:17:53.1 |
HIP 850 |
14.49 |
| 2026-04-01 12:00 |
00:09:49.92 |
-30:17:28.7 |
HIP 850 |
13.65 |
| 2026-04-02 00:00 |
00:09:58.66 |
-30:17:05.1 |
HIP 850 |
13.03 |
| 2026-04-02 12:00 |
00:10:07.37 |
-30:16:42.1 |
HIP 850 |
12.67 |
| 2026-04-03 00:00 |
00:10:16.07 |
-30:16:19.8 |
HIP 850 |
12.59 |
| 2026-04-03 12:00 |
00:10:24.75 |
-30:15:58.2 |
HIP 850 |
12.78 |
| 2026-04-04 00:00 |
00:10:33.42 |
-30:15:37.3 |
HIP 850 |
13.23 |
| 2026-04-04 12:00 |
00:10:42.06 |
-30:15:17.1 |
HIP 850 |
13.92 |
| 2026-04-05 00:00 |
00:10:50.69 |
-30:14:57.6 |
HIP 850 |
14.80 |
| 2026-04-05 12:00 |
00:10:59.30 |
-30:14:38.8 |
HIP 850 |
15.85 |
| 2026-04-06 00:00 |
00:11:07.88 |
-30:14:20.7 |
HIP 850 |
17.04 |
| 2026-04-06 12:00 |
00:11:16.45 |
-30:14:03.4 |
HIP 850 |
18.32 |
| 2026-04-07 00:00 |
00:11:25.00 |
-30:13:46.7 |
HIP 850 |
19.69 |
| 2026-04-07 12:00 |
00:11:33.52 |
-30:13:30.8 |
HIP 850 |
21.12 |
| 2026-04-08 00:00 |
00:11:42.02 |
-30:13:15.6 |
HIP 1060 |
20.89 |
| 2026-04-08 12:00 |
00:11:50.50 |
-30:13:01.1 |
HIP 1060 |
19.31 |
| 2026-04-09 00:00 |
00:11:58.96 |
-30:12:47.3 |
HIP 1060 |
17.76 |
| 2026-04-09 12:00 |
00:12:07.39 |
-30:12:34.3 |
HIP 1060 |
16.28 |
| 2026-04-10 00:00 |
00:12:15.80 |
-30:12:22.0 |
HIP 1060 |
14.88 |
| 2026-04-10 12:00 |
00:12:24.18 |
-30:12:10.4 |
HIP 1060 |
13.57 |
| 2026-04-11 00:00 |
00:12:32.54 |
-30:11:59.5 |
HIP 1060 |
12.38 |
| 2026-04-11 12:00 |
00:12:40.87 |
-30:11:49.4 |
HIP 1060 |
11.36 |
| 2026-04-12 00:00 |
00:12:49.17 |
-30:11:40.0 |
HIP 1060 |
10.54 |
| 2026-04-12 12:00 |
00:12:57.45 |
-30:11:31.4 |
HIP 1060 |
9.97 |
| 2026-04-13 00:00 |
00:13:05.70 |
-30:11:23.5 |
HIP 1060 |
9.69 |
| 2026-04-13 12:00 |
00:13:13.92 |
-30:11:16.3 |
HIP 1060 |
9.73 |
| 2026-04-14 00:00 |
00:13:22.11 |
-30:11:09.9 |
HIP 1060 |
10.07 |
| 2026-04-14 12:00 |
00:13:30.27 |
-30:11:04.2 |
HIP 1060 |
10.68 |
| 2026-04-15 00:00 |
00:13:38.40 |
-30:10:59.3 |
HIP 1060 |
11.52 |
| 2026-04-15 12:00 |
00:13:46.50 |
-30:10:55.2 |
HIP 1060 |
12.53 |
| 2026-04-16 00:00 |
00:13:54.56 |
-30:10:51.8 |
HIP 1060 |
13.68 |