C/2022 U3 (Bok)
メタデータ
| 項目 |
値 |
| Designation |
C/2022 U3 (Bok) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2024-07-28T01:19:12.527040Z |
| Orbit solution date (soln_date, UTC) |
2025-09-30T13:39:23Z |
| Obs used |
800 |
| NEO |
- |
| M1 |
9.000 |
| K1 |
8.250 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2022-10-31T06:16:30.662400Z |
| Discovery magnitude (MPC) |
19.66 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) |
2023-12-15.0000000 |
| e |
1.00319358 |
| q (au) |
4.826934 |
| a (au) |
-1511.447095 |
| i (deg) |
33.637950 |
| Ω (om, deg) |
272.788766 |
| ω (w, deg) |
189.046156 |
| M (ma, deg) |
-0.003792 |
等級
散乱 + 全体線形
$$
M_a = (7.834 + 3.396\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
7.834 |
| n |
3.396 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
1.000 |
| 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 |
09:58:47.32 |
-26:05:45.6 |
HIP 49006 |
23.21 |
| 2026-02-03 12:00 |
09:58:34.75 |
-26:06:29.5 |
HIP 49006 |
24.55 |
| 2026-02-04 00:00 |
09:58:22.12 |
-26:07:11.4 |
HIP 49006 |
26.17 |
| 2026-02-04 12:00 |
09:58:09.45 |
-26:07:51.5 |
HIP 49006 |
28.03 |
| 2026-02-05 00:00 |
09:57:56.73 |
-26:08:29.7 |
HIP 48763 |
29.06 |
| 2026-02-05 12:00 |
09:57:43.97 |
-26:09:06.0 |
HIP 48763 |
27.09 |
| 2026-02-06 00:00 |
09:57:31.17 |
-26:09:40.4 |
HIP 48763 |
25.33 |
| 2026-02-06 12:00 |
09:57:18.32 |
-26:10:12.9 |
HIP 48763 |
23.83 |
| 2026-02-07 00:00 |
09:57:05.45 |
-26:10:43.5 |
HIP 48763 |
22.64 |
| 2026-02-07 12:00 |
09:56:52.53 |
-26:11:12.2 |
HIP 48763 |
21.82 |
| 2026-02-08 00:00 |
09:56:39.59 |
-26:11:39.1 |
HIP 48763 |
21.40 |
| 2026-02-08 12:00 |
09:56:26.61 |
-26:12:04.0 |
HIP 48763 |
21.40 |
| 2026-02-09 00:00 |
09:56:13.61 |
-26:12:27.1 |
HIP 48763 |
21.84 |
| 2026-02-09 12:00 |
09:56:00.58 |
-26:12:48.4 |
HIP 48763 |
22.69 |
| 2026-02-10 00:00 |
09:55:47.52 |
-26:13:07.7 |
HIP 48763 |
23.90 |
| 2026-02-10 12:00 |
09:55:34.45 |
-26:13:25.2 |
HIP 48559 |
25.38 |
| 2026-02-11 00:00 |
09:55:21.36 |
-26:13:40.8 |
HIP 48559 |
23.53 |
| 2026-02-11 12:00 |
09:55:08.25 |
-26:13:54.5 |
HIP 48559 |
21.90 |
| 2026-02-12 00:00 |
09:54:55.12 |
-26:14:06.4 |
HIP 48559 |
20.53 |
| 2026-02-12 12:00 |
09:54:41.98 |
-26:14:16.4 |
HIP 48559 |
19.49 |
| 2026-02-13 00:00 |
09:54:28.84 |
-26:14:24.6 |
HIP 48559 |
18.82 |
| 2026-02-13 12:00 |
09:54:15.68 |
-26:14:30.9 |
HIP 48559 |
18.58 |
| 2026-02-14 00:00 |
09:54:02.52 |
-26:14:35.4 |
HIP 48559 |
18.77 |
| 2026-02-14 12:00 |
09:53:49.36 |
-26:14:38.1 |
HIP 48559 |
19.39 |
| 2026-02-15 00:00 |
09:53:36.20 |
-26:14:38.9 |
HIP 48559 |
20.39 |
| 2026-02-15 12:00 |
09:53:23.04 |
-26:14:37.9 |
HIP 48559 |
21.73 |
| 2026-02-16 00:00 |
09:53:09.88 |
-26:14:35.1 |
HIP 48529 |
23.13 |
| 2026-02-16 12:00 |
09:52:56.73 |
-26:14:30.6 |
HIP 48529 |
24.50 |
| 2026-02-17 00:00 |
09:52:43.59 |
-26:14:24.2 |
HIP 48529 |
26.16 |
| 2026-02-17 12:00 |
09:52:30.46 |
-26:14:16.0 |
HIP 48293 |
23.93 |
| 2026-02-18 00:00 |
09:52:17.34 |
-26:14:06.0 |
HIP 48293 |
21.13 |
| 2026-02-18 12:00 |
09:52:04.24 |
-26:13:54.3 |
HIP 48293 |
18.40 |
| 2026-02-19 00:00 |
09:51:51.16 |
-26:13:40.8 |
HIP 48293 |
15.75 |
| 2026-02-19 12:00 |
09:51:38.10 |
-26:13:25.6 |
HIP 48293 |
13.25 |
| 2026-02-20 00:00 |
09:51:25.07 |
-26:13:08.6 |
HIP 48293 |
10.98 |
| 2026-02-20 12:00 |
09:51:12.05 |
-26:12:50.0 |
HIP 48293 |
9.14 |
| 2026-02-21 00:00 |
09:50:59.07 |
-26:12:29.5 |
HIP 48293 |
8.00 |
| 2026-02-21 12:00 |
09:50:46.12 |
-26:12:07.4 |
HIP 48293 |
7.89 |
| 2026-02-22 00:00 |
09:50:33.20 |
-26:11:43.6 |
HIP 48293 |
8.83 |
| 2026-02-22 12:00 |
09:50:20.31 |
-26:11:18.2 |
HIP 48293 |
10.54 |
| 2026-02-23 00:00 |
09:50:07.47 |
-26:10:51.0 |
HIP 48293 |
12.72 |
| 2026-02-23 12:00 |
09:49:54.66 |
-26:10:22.2 |
HIP 48293 |
15.15 |
| 2026-02-24 00:00 |
09:49:41.89 |
-26:09:51.8 |
HIP 48293 |
17.74 |