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 · University of Arizona 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) |
| 2026-09-20 00:00 |
13:37:43.90 |
-32:22:05.8 |
HIP 66469 |
1.23 |
| 2026-09-20 12:00 |
13:37:54.22 |
-32:22:46.9 |
HIP 66469 |
3.51 |
| 2026-09-21 00:00 |
13:38:04.57 |
-32:23:28.6 |
HIP 66469 |
5.80 |
| 2026-09-21 12:00 |
13:38:14.95 |
-32:24:10.9 |
HIP 66469 |
8.10 |
| 2026-09-22 00:00 |
13:38:25.37 |
-32:24:53.7 |
HIP 66469 |
10.42 |
| 2026-09-22 12:00 |
13:38:35.82 |
-32:25:37.0 |
HIP 66527 |
12.48 |
| 2026-09-23 00:00 |
13:38:46.30 |
-32:26:20.9 |
HIP 66527 |
14.18 |
| 2026-09-23 12:00 |
13:38:56.82 |
-32:27:05.3 |
HIP 66527 |
16.05 |
| 2026-09-24 00:00 |
13:39:07.37 |
-32:27:50.2 |
HIP 66527 |
18.04 |
| 2026-09-24 12:00 |
13:39:17.94 |
-32:28:35.7 |
HIP 66527 |
20.12 |
| 2026-09-25 00:00 |
13:39:28.55 |
-32:29:21.7 |
HIP 66527 |
22.27 |
| 2026-09-25 12:00 |
13:39:39.19 |
-32:30:08.2 |
HIP 66527 |
24.46 |
| 2026-09-26 00:00 |
13:39:49.86 |
-32:30:55.3 |
HIP 66527 |
26.70 |
| 2026-09-26 12:00 |
13:40:00.56 |
-32:31:42.9 |
HIP 66527 |
28.97 |
| 2026-09-27 00:00 |
13:40:11.28 |
-32:32:31.0 |
HIP 66527 |
31.27 |
| 2026-09-27 12:00 |
13:40:22.04 |
-32:33:19.6 |
HIP 66916 |
31.90 |
| 2026-09-28 00:00 |
13:40:32.82 |
-32:34:08.7 |
HIP 66916 |
29.51 |
| 2026-09-28 12:00 |
13:40:43.63 |
-32:34:58.4 |
HIP 66916 |
27.11 |
| 2026-09-29 00:00 |
13:40:54.46 |
-32:35:48.6 |
HIP 66916 |
24.71 |
| 2026-09-29 12:00 |
13:41:05.32 |
-32:36:39.2 |
HIP 66916 |
22.32 |
| 2026-09-30 00:00 |
13:41:16.20 |
-32:37:30.4 |
HIP 66916 |
19.92 |
| 2026-09-30 12:00 |
13:41:27.11 |
-32:38:22.1 |
HIP 66916 |
17.54 |
| 2026-10-01 00:00 |
13:41:38.04 |
-32:39:14.3 |
HIP 66916 |
15.17 |
| 2026-10-01 12:00 |
13:41:49.00 |
-32:40:07.0 |
HIP 66916 |
12.83 |
| 2026-10-02 00:00 |
13:41:59.98 |
-32:41:00.1 |
HIP 66916 |
10.55 |
| 2026-10-02 12:00 |
13:42:10.98 |
-32:41:53.8 |
HIP 66916 |
8.38 |
| 2026-10-03 00:00 |
13:42:22.00 |
-32:42:48.0 |
HIP 66916 |
6.43 |
| 2026-10-03 12:00 |
13:42:33.05 |
-32:43:42.7 |
HIP 66916 |
4.99 |
| 2026-10-04 00:00 |
13:42:44.11 |
-32:44:37.8 |
HIP 66916 |
4.59 |
| 2026-10-04 12:00 |
13:42:55.20 |
-32:45:33.5 |
HIP 66916 |
5.46 |
| 2026-10-05 00:00 |
13:43:06.30 |
-32:46:29.6 |
HIP 66916 |
7.16 |
| 2026-10-05 12:00 |
13:43:17.43 |
-32:47:26.2 |
HIP 66916 |
9.25 |
| 2026-10-06 00:00 |
13:43:28.57 |
-32:48:23.3 |
HIP 66916 |
11.52 |
| 2026-10-06 12:00 |
13:43:39.73 |
-32:49:20.9 |
HIP 66916 |
13.89 |
| 2026-10-07 00:00 |
13:43:50.91 |
-32:50:18.9 |
HIP 66916 |
16.32 |
| 2026-10-07 12:00 |
13:44:02.10 |
-32:51:17.4 |
HIP 66916 |
18.78 |
| 2026-10-08 00:00 |
13:44:13.31 |
-32:52:16.4 |
HIP 67035 |
19.77 |
| 2026-10-08 12:00 |
13:44:24.54 |
-32:53:15.8 |
HIP 67153 |
18.66 |
| 2026-10-09 00:00 |
13:44:35.78 |
-32:54:15.8 |
HIP 67153 |
16.12 |
| 2026-10-09 12:00 |
13:44:47.03 |
-32:55:16.1 |
HIP 67153 |
13.59 |
| 2026-10-10 00:00 |
13:44:58.30 |
-32:56:17.0 |
HIP 67153 |
11.06 |
| 2026-10-10 12:00 |
13:45:09.58 |
-32:57:18.3 |
HIP 67153 |
8.55 |
| 2026-10-11 00:00 |
13:45:20.87 |
-32:58:20.0 |
HIP 67153 |
6.09 |