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
$$
M_a = (7.781 + 3.427\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
7.781 |
| n |
3.427 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 2021-06-23 |
2024-04-10 |
+2.0797 |
-1.688 |
| 2024-09-14 |
2026-02-07 |
+7.5196 |
-4.311 |
log10 r = log10(太陽距離/AU)、Δ = 地球距離(AU)
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
10:16:52.16 |
-21:52:53.4 |
HIP 50417 |
20.79 |
| 2026-07-29 12:00 |
10:17:11.34 |
-21:53:59.6 |
HIP 50417 |
19.82 |
| 2026-07-30 00:00 |
10:17:30.55 |
-21:55:06.8 |
HIP 50417 |
19.90 |
| 2026-07-30 12:00 |
10:17:49.78 |
-21:56:14.8 |
HIP 50417 |
21.02 |
| 2026-07-31 00:00 |
10:18:09.04 |
-21:57:23.7 |
HIP 50417 |
23.05 |
| 2026-07-31 12:00 |
10:18:28.32 |
-21:58:33.4 |
HIP 50417 |
25.77 |
| 2026-08-01 00:00 |
10:18:47.63 |
-21:59:44.1 |
HIP 50417 |
28.99 |
| 2026-08-01 12:00 |
10:19:06.96 |
-22:00:55.6 |
HIP 50570 |
31.98 |
| 2026-08-02 00:00 |
10:19:26.32 |
-22:02:08.0 |
HIP 50570 |
29.73 |
| 2026-08-02 12:00 |
10:19:45.70 |
-22:03:21.3 |
HIP 50570 |
28.06 |
| 2026-08-03 00:00 |
10:20:05.10 |
-22:04:35.4 |
HIP 50570 |
27.08 |
| 2026-08-03 12:00 |
10:20:24.52 |
-22:05:50.4 |
HIP 50570 |
26.86 |
| 2026-08-04 00:00 |
10:20:43.97 |
-22:07:06.2 |
HIP 50739 |
27.38 |
| 2026-08-04 12:00 |
10:21:03.44 |
-22:08:23.0 |
HIP 50739 |
24.51 |
| 2026-08-05 00:00 |
10:21:22.93 |
-22:09:40.5 |
HIP 50739 |
22.24 |
| 2026-08-05 12:00 |
10:21:42.44 |
-22:10:59.0 |
HIP 50739 |
20.78 |
| 2026-08-06 00:00 |
10:22:01.97 |
-22:12:18.2 |
HIP 50739 |
20.32 |
| 2026-08-06 12:00 |
10:22:21.51 |
-22:13:38.4 |
HIP 50739 |
20.92 |
| 2026-08-07 00:00 |
10:22:41.08 |
-22:14:59.3 |
HIP 50739 |
22.51 |
| 2026-08-07 12:00 |
10:23:00.67 |
-22:16:21.2 |
HIP 50739 |
24.90 |
| 2026-08-08 00:00 |
10:23:20.27 |
-22:17:43.8 |
HIP 50739 |
27.88 |
| 2026-08-08 12:00 |
10:23:39.89 |
-22:19:07.3 |
HIP 50739 |
31.30 |
| 2026-08-09 00:00 |
10:23:59.53 |
-22:20:31.7 |
HIP 51035 |
32.16 |
| 2026-08-09 12:00 |
10:24:19.18 |
-22:21:56.9 |
HIP 51035 |
30.36 |
| 2026-08-10 00:00 |
10:24:38.85 |
-22:23:22.9 |
HIP 51035 |
29.25 |
| 2026-08-10 12:00 |
10:24:58.53 |
-22:24:49.8 |
HIP 51035 |
28.90 |
| 2026-08-11 00:00 |
10:25:18.23 |
-22:26:17.4 |
HIP 51035 |
29.36 |
| 2026-08-11 12:00 |
10:25:37.94 |
-22:27:46.0 |
HIP 51035 |
30.58 |
| 2026-08-12 00:00 |
10:25:57.66 |
-22:29:15.3 |
HIP 51035 |
32.49 |
| 2026-08-12 12:00 |
10:26:17.39 |
-22:30:45.5 |
HIP 51035 |
34.97 |
| 2026-08-13 00:00 |
10:26:37.14 |
-22:32:16.4 |
HIP 51326 |
37.63 |
| 2026-08-13 12:00 |
10:26:56.90 |
-22:33:48.2 |
HIP 51326 |
34.43 |
| 2026-08-14 00:00 |
10:27:16.67 |
-22:35:20.8 |
HIP 51326 |
31.64 |
| 2026-08-14 12:00 |
10:27:36.45 |
-22:36:54.2 |
HIP 51326 |
29.40 |
| 2026-08-15 00:00 |
10:27:56.23 |
-22:38:28.4 |
HIP 51326 |
27.83 |
| 2026-08-15 12:00 |
10:28:16.03 |
-22:40:03.4 |
HIP 51326 |
27.06 |
| 2026-08-16 00:00 |
10:28:35.83 |
-22:41:39.2 |
HIP 51326 |
27.16 |
| 2026-08-16 12:00 |
10:28:55.65 |
-22:43:15.8 |
HIP 51326 |
28.12 |
| 2026-08-17 00:00 |
10:29:15.46 |
-22:44:53.2 |
HIP 51326 |
29.86 |
| 2026-08-17 12:00 |
10:29:35.29 |
-22:46:31.4 |
HIP 51381 |
31.71 |
| 2026-08-18 00:00 |
10:29:55.12 |
-22:48:10.3 |
HIP 51324 |
33.28 |
| 2026-08-18 12:00 |
10:30:14.95 |
-22:49:50.0 |
HIP 51324 |
33.78 |
| 2026-08-19 00:00 |
10:30:34.79 |
-22:51:30.5 |
HIP 51324 |
34.95 |