メタデータ
| 項目 |
値 |
| Designation |
C/2023 V5 (Leonard) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2023-12-13T21:25:38.058240Z |
| Orbit solution date (soln_date, UTC) |
2024-04-13T16:42:53Z |
| Obs used |
148 |
| NEO |
- |
| M1 |
21.400 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2023-11-06T03:26:34.857600Z |
| Discovery magnitude (MPC) |
17.40 G |
| Discovery observatory (MPC) |
703 · Catalina Sky Survey |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2023-11-07.0000000 |
| e |
1.00813865 |
| q (au) |
0.846019 |
| a (au) |
-103.950734 |
| i (deg) |
73.557595 |
| Ω (om, deg) |
31.524093 |
| ω (w, deg) |
56.987549 |
| M (ma, deg) |
-0.034309 |
等級
散乱 + 全体線形
$$
M_a = (20.000 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
20.000 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| 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 |
14:04:27.20 |
-35:49:23.0 |
HIP 68775 |
10.86 |
| 2026-03-26 12:00 |
14:04:12.20 |
-35:49:30.6 |
HIP 68775 |
11.93 |
| 2026-03-27 00:00 |
14:03:57.14 |
-35:49:37.1 |
HIP 68775 |
13.61 |
| 2026-03-27 12:00 |
14:03:42.00 |
-35:49:42.7 |
HIP 68602 |
14.01 |
| 2026-03-28 00:00 |
14:03:26.80 |
-35:49:47.2 |
HIP 68602 |
10.98 |
| 2026-03-28 12:00 |
14:03:11.54 |
-35:49:50.7 |
HIP 68602 |
7.97 |
| 2026-03-29 00:00 |
14:02:56.21 |
-35:49:53.2 |
HIP 68602 |
5.04 |
| 2026-03-29 12:00 |
14:02:40.82 |
-35:49:54.6 |
HIP 68602 |
2.57 |
| 2026-03-30 00:00 |
14:02:25.37 |
-35:49:55.0 |
HIP 68602 |
2.69 |
| 2026-03-30 12:00 |
14:02:09.86 |
-35:49:54.4 |
HIP 68602 |
5.25 |
| 2026-03-31 00:00 |
14:01:54.30 |
-35:49:52.8 |
HIP 68602 |
8.23 |
| 2026-03-31 12:00 |
14:01:38.68 |
-35:49:50.2 |
HIP 68602 |
11.31 |
| 2026-04-01 00:00 |
14:01:23.00 |
-35:49:46.5 |
HIP 68426 |
11.21 |
| 2026-04-01 12:00 |
14:01:07.28 |
-35:49:41.8 |
HIP 68426 |
8.12 |
| 2026-04-02 00:00 |
14:00:51.50 |
-35:49:36.1 |
HIP 68426 |
5.14 |
| 2026-04-02 12:00 |
14:00:35.68 |
-35:49:29.4 |
HIP 68426 |
2.69 |
| 2026-04-03 00:00 |
14:00:19.80 |
-35:49:21.7 |
HIP 68426 |
2.94 |
| 2026-04-03 12:00 |
14:00:03.89 |
-35:49:13.0 |
HIP 68426 |
5.55 |
| 2026-04-04 00:00 |
13:59:47.93 |
-35:49:03.2 |
HIP 68426 |
8.60 |
| 2026-04-04 12:00 |
13:59:31.92 |
-35:48:52.4 |
HIP 68426 |
11.76 |
| 2026-04-05 00:00 |
13:59:15.88 |
-35:48:40.7 |
HIP 68385 |
14.52 |
| 2026-04-05 12:00 |
13:58:59.80 |
-35:48:27.9 |
HIP 68385 |
16.42 |
| 2026-04-06 00:00 |
13:58:43.67 |
-35:48:14.1 |
HIP 68385 |
18.69 |
| 2026-04-06 12:00 |
13:58:27.52 |
-35:47:59.4 |
HIP 68385 |
21.23 |
| 2026-04-07 00:00 |
13:58:11.33 |
-35:47:43.6 |
HIP 68182 |
22.87 |
| 2026-04-07 12:00 |
13:57:55.11 |
-35:47:26.8 |
HIP 68182 |
21.59 |
| 2026-04-08 00:00 |
13:57:38.85 |
-35:47:09.1 |
HIP 68182 |
20.74 |
| 2026-04-08 12:00 |
13:57:22.57 |
-35:46:50.3 |
HIP 68078 |
19.05 |
| 2026-04-09 00:00 |
13:57:06.26 |
-35:46:30.6 |
HIP 68078 |
16.73 |
| 2026-04-09 12:00 |
13:56:49.93 |
-35:46:09.8 |
HIP 68078 |
14.77 |
| 2026-04-10 00:00 |
13:56:33.57 |
-35:45:48.1 |
HIP 68004 |
12.82 |
| 2026-04-10 12:00 |
13:56:17.19 |
-35:45:25.5 |
HIP 68004 |
9.92 |
| 2026-04-11 00:00 |
13:56:00.79 |
-35:45:01.8 |
HIP 68004 |
7.40 |
| 2026-04-11 12:00 |
13:55:44.37 |
-35:44:37.2 |
HIP 68004 |
5.81 |
| 2026-04-12 00:00 |
13:55:27.94 |
-35:44:11.6 |
HIP 68004 |
5.95 |
| 2026-04-12 12:00 |
13:55:11.49 |
-35:43:45.1 |
HIP 68004 |
7.74 |
| 2026-04-13 00:00 |
13:54:55.02 |
-35:43:17.6 |
HIP 68004 |
10.36 |
| 2026-04-13 12:00 |
13:54:38.55 |
-35:42:49.1 |
HIP 68004 |
13.33 |
| 2026-04-14 00:00 |
13:54:22.06 |
-35:42:19.7 |
HIP 67819 |
10.30 |
| 2026-04-14 12:00 |
13:54:05.57 |
-35:41:49.4 |
HIP 67819 |
6.94 |
| 2026-04-15 00:00 |
13:53:49.07 |
-35:41:18.1 |
HIP 67819 |
3.61 |
| 2026-04-15 12:00 |
13:53:32.57 |
-35:40:45.9 |
HIP 67819 |
0.92 |
| 2026-04-16 00:00 |
13:53:16.07 |
-35:40:12.8 |
HIP 67819 |
3.42 |