メタデータ
| 項目 |
値 |
| Designation |
C/2024 E2 (Bok) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2023-10-23T18:35:47.109120Z |
| Orbit solution date (soln_date, UTC) |
2024-05-14T12:42:25Z |
| Obs used |
81 |
| NEO |
- |
| M1 |
8.600 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-03-10T06:03:37.900800Z |
| Discovery magnitude (MPC) |
22.75 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) |
2024-03-17.0000000 |
| e |
0.85195999 |
| q (au) |
7.692115 |
| a (au) |
51.959703 |
| i (deg) |
155.652171 |
| Ω (om, deg) |
135.652797 |
| ω (w, deg) |
358.035418 |
| M (ma, deg) |
0.382161 |
等級
散乱 + 全体線形
$$
M_a = (12.032 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
12.032 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.501 |
| 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) |
| 2026-06-01 00:00 |
05:41:12.97 |
+40:08:22.2 |
HIP 26850 |
11.74 |
| 2026-06-01 12:00 |
05:41:21.41 |
+40:08:31.3 |
HIP 26850 |
10.41 |
| 2026-06-02 00:00 |
05:41:29.89 |
+40:08:40.8 |
HIP 26850 |
9.17 |
| 2026-06-02 12:00 |
05:41:38.39 |
+40:08:50.6 |
HIP 26850 |
8.06 |
| 2026-06-03 00:00 |
05:41:46.91 |
+40:09:00.8 |
HIP 26850 |
7.15 |
| 2026-06-03 12:00 |
05:41:55.46 |
+40:09:11.4 |
HIP 26850 |
6.52 |
| 2026-06-04 00:00 |
05:42:04.03 |
+40:09:22.3 |
HIP 26850 |
6.26 |
| 2026-06-04 12:00 |
05:42:12.62 |
+40:09:33.7 |
HIP 26850 |
6.42 |
| 2026-06-05 00:00 |
05:42:21.24 |
+40:09:45.3 |
HIP 26909 |
6.85 |
| 2026-06-05 12:00 |
05:42:29.88 |
+40:09:57.4 |
HIP 26909 |
5.64 |
| 2026-06-06 00:00 |
05:42:38.54 |
+40:10:09.8 |
HIP 26909 |
4.70 |
| 2026-06-06 12:00 |
05:42:47.22 |
+40:10:22.6 |
HIP 26909 |
4.23 |
| 2026-06-07 00:00 |
05:42:55.92 |
+40:10:35.7 |
HIP 26909 |
4.39 |
| 2026-06-07 12:00 |
05:43:04.64 |
+40:10:49.2 |
HIP 26909 |
5.12 |
| 2026-06-08 00:00 |
05:43:13.37 |
+40:11:03.1 |
HIP 26909 |
6.22 |
| 2026-06-08 12:00 |
05:43:22.12 |
+40:11:17.3 |
HIP 26909 |
7.55 |
| 2026-06-09 00:00 |
05:43:30.89 |
+40:11:31.9 |
HIP 26909 |
8.99 |
| 2026-06-09 12:00 |
05:43:39.67 |
+40:11:46.9 |
HIP 26909 |
10.52 |
| 2026-06-10 00:00 |
05:43:48.47 |
+40:12:02.2 |
HIP 26909 |
12.08 |
| 2026-06-10 12:00 |
05:43:57.28 |
+40:12:17.9 |
HIP 27067 |
13.08 |
| 2026-06-11 00:00 |
05:44:06.10 |
+40:12:34.0 |
HIP 27067 |
12.25 |
| 2026-06-11 12:00 |
05:44:14.94 |
+40:12:50.4 |
HIP 27067 |
11.60 |
| 2026-06-12 00:00 |
05:44:23.78 |
+40:13:07.2 |
HIP 27067 |
11.17 |
| 2026-06-12 12:00 |
05:44:32.64 |
+40:13:24.4 |
HIP 27067 |
10.99 |
| 2026-06-13 00:00 |
05:44:41.50 |
+40:13:41.9 |
HIP 27067 |
11.07 |
| 2026-06-13 12:00 |
05:44:50.38 |
+40:13:59.8 |
HIP 27067 |
11.40 |
| 2026-06-14 00:00 |
05:44:59.26 |
+40:14:18.1 |
HIP 27070 |
11.92 |
| 2026-06-14 12:00 |
05:45:08.14 |
+40:14:36.7 |
HIP 27070 |
12.65 |
| 2026-06-15 00:00 |
05:45:17.04 |
+40:14:55.7 |
HIP 27070 |
13.55 |
| 2026-06-15 12:00 |
05:45:25.93 |
+40:15:15.1 |
HIP 27070 |
14.60 |
| 2026-06-16 00:00 |
05:45:34.83 |
+40:15:34.8 |
HIP 27192 |
15.12 |
| 2026-06-16 12:00 |
05:45:43.74 |
+40:15:54.9 |
HIP 27192 |
14.56 |
| 2026-06-17 00:00 |
05:45:52.64 |
+40:16:15.3 |
HIP 27192 |
14.19 |
| 2026-06-17 12:00 |
05:46:01.55 |
+40:16:36.2 |
HIP 27192 |
14.02 |
| 2026-06-18 00:00 |
05:46:10.45 |
+40:16:57.4 |
HIP 27192 |
14.05 |
| 2026-06-18 12:00 |
05:46:19.36 |
+40:17:18.9 |
HIP 27192 |
14.30 |
| 2026-06-19 00:00 |
05:46:28.26 |
+40:17:40.8 |
HIP 27192 |
14.73 |
| 2026-06-19 12:00 |
05:46:37.16 |
+40:18:03.1 |
HIP 27192 |
15.35 |
| 2026-06-20 00:00 |
05:46:46.06 |
+40:18:25.8 |
HIP 27192 |
16.12 |
| 2026-06-20 12:00 |
05:46:54.95 |
+40:18:48.8 |
HIP 27192 |
17.03 |
| 2026-06-21 00:00 |
05:47:03.83 |
+40:19:12.2 |
HIP 27192 |
18.06 |
| 2026-06-21 12:00 |
05:47:12.71 |
+40:19:35.9 |
HIP 27192 |
19.19 |
| 2026-06-22 00:00 |
05:47:21.59 |
+40:20:00.1 |
HIP 27192 |
20.39 |