メタデータ
| 項目 |
値 |
| Designation |
C/2022 U3 (Bok) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2024-07-28T01:29:51.809280Z |
| Orbit solution date (soln_date, UTC) |
2026-03-07T14:42:53Z |
| Obs used |
803 |
| NEO |
- |
| M1 |
8.800 |
| K1 |
8.500 |
| 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) |
2023-12-18.0000000 |
| e |
1.00318343 |
| q (au) |
4.826915 |
| a (au) |
-1516.261844 |
| i (deg) |
33.638233 |
| Ω (om, deg) |
272.788587 |
| ω (w, deg) |
189.047254 |
| M (ma, deg) |
-0.003724 |
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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
09:39:22.38 |
-24:58:58.0 |
HIP 47187 |
37.28 |
| 2026-03-26 12:00 |
09:39:15.50 |
-24:57:17.5 |
HIP 47187 |
36.85 |
| 2026-03-27 00:00 |
09:39:08.76 |
-24:55:36.5 |
HIP 47187 |
36.60 |
| 2026-03-27 12:00 |
09:39:02.17 |
-24:53:55.0 |
HIP 47159 |
35.67 |
| 2026-03-28 00:00 |
09:38:55.71 |
-24:52:12.9 |
HIP 47159 |
33.75 |
| 2026-03-28 12:00 |
09:38:49.39 |
-24:50:30.4 |
HIP 47159 |
31.90 |
| 2026-03-29 00:00 |
09:38:43.22 |
-24:48:47.3 |
HIP 47159 |
30.13 |
| 2026-03-29 12:00 |
09:38:37.18 |
-24:47:03.8 |
HIP 47159 |
28.45 |
| 2026-03-30 00:00 |
09:38:31.29 |
-24:45:19.8 |
HIP 47159 |
26.88 |
| 2026-03-30 12:00 |
09:38:25.55 |
-24:43:35.3 |
HIP 47159 |
25.43 |
| 2026-03-31 00:00 |
09:38:19.94 |
-24:41:50.5 |
HIP 47159 |
24.12 |
| 2026-03-31 12:00 |
09:38:14.48 |
-24:40:05.3 |
HIP 47159 |
22.98 |
| 2026-04-01 00:00 |
09:38:09.17 |
-24:38:19.7 |
HIP 47159 |
22.02 |
| 2026-04-01 12:00 |
09:38:04.00 |
-24:36:33.7 |
HIP 47159 |
21.26 |
| 2026-04-02 00:00 |
09:37:58.97 |
-24:34:47.4 |
HIP 47159 |
20.73 |
| 2026-04-02 12:00 |
09:37:54.10 |
-24:33:00.7 |
HIP 47159 |
20.43 |
| 2026-04-03 00:00 |
09:37:49.37 |
-24:31:13.7 |
HIP 47159 |
20.38 |
| 2026-04-03 12:00 |
09:37:44.78 |
-24:29:26.5 |
HIP 47159 |
20.57 |
| 2026-04-04 00:00 |
09:37:40.35 |
-24:27:39.0 |
HIP 47159 |
20.98 |
| 2026-04-04 12:00 |
09:37:36.06 |
-24:25:51.2 |
HIP 47154 |
19.10 |
| 2026-04-05 00:00 |
09:37:31.92 |
-24:24:03.2 |
HIP 47154 |
17.25 |
| 2026-04-05 12:00 |
09:37:27.93 |
-24:22:14.9 |
HIP 47154 |
15.47 |
| 2026-04-06 00:00 |
09:37:24.09 |
-24:20:26.5 |
HIP 47154 |
13.79 |
| 2026-04-06 12:00 |
09:37:20.40 |
-24:18:37.8 |
HIP 47154 |
12.24 |
| 2026-04-07 00:00 |
09:37:16.85 |
-24:16:49.0 |
HIP 47154 |
10.86 |
| 2026-04-07 12:00 |
09:37:13.46 |
-24:15:00.1 |
HIP 47154 |
9.73 |
| 2026-04-08 00:00 |
09:37:10.22 |
-24:13:11.0 |
HIP 47154 |
8.94 |
| 2026-04-08 12:00 |
09:37:07.13 |
-24:11:21.8 |
HIP 47154 |
8.56 |
| 2026-04-09 00:00 |
09:37:04.19 |
-24:09:32.4 |
HIP 47154 |
8.65 |
| 2026-04-09 12:00 |
09:37:01.41 |
-24:07:43.0 |
HIP 47154 |
9.19 |
| 2026-04-10 00:00 |
09:36:58.77 |
-24:05:53.6 |
HIP 47154 |
10.10 |
| 2026-04-10 12:00 |
09:36:56.29 |
-24:04:04.0 |
HIP 47154 |
11.28 |
| 2026-04-11 00:00 |
09:36:53.96 |
-24:02:14.5 |
HIP 47154 |
12.66 |
| 2026-04-11 12:00 |
09:36:51.78 |
-24:00:24.9 |
HIP 47154 |
14.17 |
| 2026-04-12 00:00 |
09:36:49.75 |
-23:58:35.3 |
HIP 47154 |
15.77 |
| 2026-04-12 12:00 |
09:36:47.88 |
-23:56:45.8 |
HIP 47154 |
17.44 |
| 2026-04-13 00:00 |
09:36:46.16 |
-23:54:56.2 |
HIP 47154 |
19.15 |
| 2026-04-13 12:00 |
09:36:44.59 |
-23:53:06.8 |
HIP 47154 |
20.89 |
| 2026-04-14 00:00 |
09:36:43.18 |
-23:51:17.4 |
HIP 47154 |
22.66 |
| 2026-04-14 12:00 |
09:36:41.92 |
-23:49:28.0 |
HIP 47154 |
24.44 |
| 2026-04-15 00:00 |
09:36:40.81 |
-23:47:38.8 |
HIP 47154 |
26.23 |
| 2026-04-15 12:00 |
09:36:39.86 |
-23:45:49.7 |
HIP 47154 |
28.02 |
| 2026-04-16 00:00 |
09:36:39.06 |
-23:44:00.7 |
HIP 47154 |
29.82 |