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 |
-0.890 |
| 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 |
05:32:29.89 |
+40:43:03.6 |
HIP 25857 |
14.97 |
| 2026-03-26 12:00 |
05:32:26.56 |
+40:42:25.9 |
HIP 25857 |
14.28 |
| 2026-03-27 00:00 |
05:32:23.38 |
+40:41:48.5 |
HIP 25857 |
13.65 |
| 2026-03-27 12:00 |
05:32:20.35 |
+40:41:11.3 |
HIP 25857 |
13.07 |
| 2026-03-28 00:00 |
05:32:17.47 |
+40:40:34.4 |
HIP 25857 |
12.55 |
| 2026-03-28 12:00 |
05:32:14.74 |
+40:39:57.7 |
HIP 25857 |
12.09 |
| 2026-03-29 00:00 |
05:32:12.15 |
+40:39:21.3 |
HIP 25857 |
11.70 |
| 2026-03-29 12:00 |
05:32:09.70 |
+40:38:45.1 |
HIP 25857 |
11.37 |
| 2026-03-30 00:00 |
05:32:07.40 |
+40:38:09.3 |
HIP 25857 |
11.11 |
| 2026-03-30 12:00 |
05:32:05.24 |
+40:37:33.7 |
HIP 25857 |
10.91 |
| 2026-03-31 00:00 |
05:32:03.23 |
+40:36:58.3 |
HIP 25857 |
10.78 |
| 2026-03-31 12:00 |
05:32:01.35 |
+40:36:23.3 |
HIP 25857 |
10.72 |
| 2026-04-01 00:00 |
05:31:59.62 |
+40:35:48.6 |
HIP 25857 |
10.72 |
| 2026-04-01 12:00 |
05:31:58.02 |
+40:35:14.1 |
HIP 25857 |
10.79 |
| 2026-04-02 00:00 |
05:31:56.57 |
+40:34:39.9 |
HIP 25857 |
10.90 |
| 2026-04-02 12:00 |
05:31:55.25 |
+40:34:06.0 |
HIP 25857 |
11.07 |
| 2026-04-03 00:00 |
05:31:54.06 |
+40:33:32.4 |
HIP 25857 |
11.29 |
| 2026-04-03 12:00 |
05:31:53.02 |
+40:32:59.1 |
HIP 25857 |
11.55 |
| 2026-04-04 00:00 |
05:31:52.11 |
+40:32:26.1 |
HIP 25857 |
11.84 |
| 2026-04-04 12:00 |
05:31:51.33 |
+40:31:53.4 |
HIP 25857 |
12.17 |
| 2026-04-05 00:00 |
05:31:50.68 |
+40:31:21.0 |
HIP 25857 |
12.52 |
| 2026-04-05 12:00 |
05:31:50.17 |
+40:30:49.0 |
HIP 25857 |
12.90 |
| 2026-04-06 00:00 |
05:31:49.79 |
+40:30:17.2 |
HIP 25857 |
13.30 |
| 2026-04-06 12:00 |
05:31:49.54 |
+40:29:45.7 |
HIP 25857 |
13.71 |
| 2026-04-07 00:00 |
05:31:49.41 |
+40:29:14.6 |
HIP 25857 |
14.14 |
| 2026-04-07 12:00 |
05:31:49.42 |
+40:28:43.7 |
HIP 25857 |
14.59 |
| 2026-04-08 00:00 |
05:31:49.56 |
+40:28:13.2 |
HIP 25857 |
15.05 |
| 2026-04-08 12:00 |
05:31:49.82 |
+40:27:43.0 |
HIP 25857 |
15.51 |
| 2026-04-09 00:00 |
05:31:50.21 |
+40:27:13.1 |
HIP 25857 |
15.99 |
| 2026-04-09 12:00 |
05:31:50.72 |
+40:26:43.6 |
HIP 25857 |
16.47 |
| 2026-04-10 00:00 |
05:31:51.36 |
+40:26:14.3 |
HIP 25857 |
16.96 |
| 2026-04-10 12:00 |
05:31:52.12 |
+40:25:45.4 |
HIP 25857 |
17.46 |
| 2026-04-11 00:00 |
05:31:53.00 |
+40:25:16.9 |
HIP 25857 |
17.96 |
| 2026-04-11 12:00 |
05:31:54.01 |
+40:24:48.6 |
HIP 25857 |
18.47 |
| 2026-04-12 00:00 |
05:31:55.13 |
+40:24:20.7 |
HIP 25857 |
18.98 |
| 2026-04-12 12:00 |
05:31:56.38 |
+40:23:53.2 |
HIP 25857 |
19.49 |
| 2026-04-13 00:00 |
05:31:57.74 |
+40:23:25.9 |
HIP 25947 |
19.71 |
| 2026-04-13 12:00 |
05:31:59.22 |
+40:22:59.1 |
HIP 25947 |
19.22 |
| 2026-04-14 00:00 |
05:32:00.82 |
+40:22:32.5 |
HIP 25947 |
18.74 |
| 2026-04-14 12:00 |
05:32:02.54 |
+40:22:06.3 |
HIP 25947 |
18.27 |
| 2026-04-15 00:00 |
05:32:04.37 |
+40:21:40.4 |
HIP 25947 |
17.80 |
| 2026-04-15 12:00 |
05:32:06.32 |
+40:21:14.9 |
HIP 25947 |
17.34 |
| 2026-04-16 00:00 |
05:32:08.38 |
+40:20:49.7 |
HIP 25947 |
16.90 |