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) |
| 2026-07-29 00:00 |
00:18:02.77 |
-34:16:14.3 |
HIP 1467 |
6.67 |
| 2026-07-29 12:00 |
00:17:54.67 |
-34:18:12.6 |
HIP 1467 |
9.22 |
| 2026-07-30 00:00 |
00:17:46.47 |
-34:20:10.9 |
HIP 1467 |
11.79 |
| 2026-07-30 12:00 |
00:17:38.18 |
-34:22:09.1 |
HIP 1467 |
14.39 |
| 2026-07-31 00:00 |
00:17:29.79 |
-34:24:07.3 |
HIP 1467 |
17.00 |
| 2026-07-31 12:00 |
00:17:21.32 |
-34:26:05.4 |
HIP 1467 |
19.62 |
| 2026-08-01 00:00 |
00:17:12.75 |
-34:28:03.4 |
HIP 1467 |
22.25 |
| 2026-08-01 12:00 |
00:17:04.10 |
-34:30:01.4 |
HIP 1305 |
21.43 |
| 2026-08-02 00:00 |
00:16:55.35 |
-34:31:59.2 |
HIP 1305 |
18.94 |
| 2026-08-02 12:00 |
00:16:46.51 |
-34:33:56.9 |
HIP 1305 |
16.50 |
| 2026-08-03 00:00 |
00:16:37.59 |
-34:35:54.5 |
HIP 1305 |
14.15 |
| 2026-08-03 12:00 |
00:16:28.57 |
-34:37:52.0 |
HIP 1305 |
11.94 |
| 2026-08-04 00:00 |
00:16:19.47 |
-34:39:49.4 |
HIP 1305 |
9.97 |
| 2026-08-04 12:00 |
00:16:10.27 |
-34:41:46.6 |
HIP 1305 |
8.43 |
| 2026-08-05 00:00 |
00:16:00.99 |
-34:43:43.6 |
HIP 1305 |
7.59 |
| 2026-08-05 12:00 |
00:15:51.62 |
-34:45:40.5 |
HIP 1305 |
7.71 |
| 2026-08-06 00:00 |
00:15:42.17 |
-34:47:37.2 |
HIP 1305 |
8.74 |
| 2026-08-06 12:00 |
00:15:32.62 |
-34:49:33.7 |
HIP 1195 |
8.48 |
| 2026-08-07 00:00 |
00:15:23.00 |
-34:51:30.0 |
HIP 1195 |
5.78 |
| 2026-08-07 12:00 |
00:15:13.28 |
-34:53:26.1 |
HIP 1195 |
3.20 |
| 2026-08-08 00:00 |
00:15:03.48 |
-34:55:22.0 |
HIP 1195 |
1.55 |
| 2026-08-08 12:00 |
00:14:53.60 |
-34:57:17.7 |
HIP 1195 |
3.19 |
| 2026-08-09 00:00 |
00:14:43.63 |
-34:59:13.1 |
HIP 1195 |
5.80 |
| 2026-08-09 12:00 |
00:14:33.58 |
-35:01:08.3 |
HIP 1195 |
8.54 |
| 2026-08-10 00:00 |
00:14:23.44 |
-35:03:03.2 |
HIP 1195 |
11.32 |
| 2026-08-10 12:00 |
00:14:13.23 |
-35:04:57.8 |
HIP 1195 |
14.13 |
| 2026-08-11 00:00 |
00:14:02.93 |
-35:06:52.1 |
HIP 1195 |
16.95 |
| 2026-08-11 12:00 |
00:13:52.55 |
-35:08:46.2 |
HIP 1195 |
19.79 |
| 2026-08-12 00:00 |
00:13:42.09 |
-35:10:39.9 |
HIP 1195 |
22.63 |
| 2026-08-12 12:00 |
00:13:31.55 |
-35:12:33.4 |
HIP 950 |
22.47 |
| 2026-08-13 00:00 |
00:13:20.94 |
-35:14:26.4 |
HIP 950 |
20.85 |
| 2026-08-13 12:00 |
00:13:10.24 |
-35:16:19.2 |
HIP 950 |
19.50 |
| 2026-08-14 00:00 |
00:12:59.47 |
-35:18:11.6 |
HIP 950 |
18.50 |
| 2026-08-14 12:00 |
00:12:48.62 |
-35:20:03.6 |
HIP 961 |
17.33 |
| 2026-08-15 00:00 |
00:12:37.69 |
-35:21:55.3 |
HIP 961 |
14.45 |
| 2026-08-15 12:00 |
00:12:26.69 |
-35:23:46.6 |
HIP 961 |
11.59 |
| 2026-08-16 00:00 |
00:12:15.62 |
-35:25:37.5 |
HIP 961 |
8.76 |
| 2026-08-16 12:00 |
00:12:04.47 |
-35:27:27.9 |
HIP 961 |
6.00 |
| 2026-08-17 00:00 |
00:11:53.25 |
-35:29:18.0 |
HIP 961 |
3.54 |
| 2026-08-17 12:00 |
00:11:41.96 |
-35:31:07.6 |
HIP 961 |
2.49 |
| 2026-08-18 00:00 |
00:11:30.60 |
-35:32:56.8 |
HIP 961 |
4.16 |
| 2026-08-18 12:00 |
00:11:19.17 |
-35:34:45.6 |
HIP 961 |
6.76 |
| 2026-08-19 00:00 |
00:11:07.67 |
-35:36:33.9 |
HIP 961 |
9.58 |