メタデータ
| 項目 |
値 |
| Designation |
C/2024 L5 (ATLAS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2025-03-10T09:34:31.059840Z |
| Orbit solution date (soln_date, UTC) |
2026-08-07T12:42:14Z |
| Obs used |
1220 |
| NEO |
- |
| M1 |
5.500 |
| K1 |
15.500 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2024-06-14T22:40:01.257600Z |
| Discovery magnitude (MPC) |
17.68 o |
| Discovery observatory (MPC) |
M22 · ATLAS South Africa, Sutherland |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2025-04-27.0000000 |
| e |
1.03719688 |
| q (au) |
3.432407 |
| a (au) |
-92.276727 |
| i (deg) |
166.573100 |
| Ω (om, deg) |
139.176342 |
| ω (w, deg) |
290.514717 |
| M (ma, deg) |
0.052928 |
等級
散乱 + 全体線形
$$
M_a = (5.290 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
5.290 |
| n |
6.000 |
| gf |
0.816 |
| gb |
-0.957 |
| k |
1.000 |
| δ90 |
1.000 |
| 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 |
09:09:37.64 |
+18:53:03.4 |
HIP 45005 |
6.73 |
| 2026-09-20 12:00 |
09:09:42.82 |
+18:53:17.3 |
HIP 45005 |
5.65 |
| 2026-09-21 00:00 |
09:09:47.91 |
+18:53:31.8 |
HIP 45005 |
4.67 |
| 2026-09-21 12:00 |
09:09:52.90 |
+18:53:46.7 |
HIP 45005 |
3.84 |
| 2026-09-22 00:00 |
09:09:57.79 |
+18:54:02.2 |
HIP 45005 |
3.25 |
| 2026-09-22 12:00 |
09:10:02.58 |
+18:54:18.3 |
HIP 45005 |
3.01 |
| 2026-09-23 00:00 |
09:10:07.27 |
+18:54:34.8 |
HIP 45005 |
3.19 |
| 2026-09-23 12:00 |
09:10:11.86 |
+18:54:51.9 |
HIP 45005 |
3.70 |
| 2026-09-24 00:00 |
09:10:16.34 |
+18:55:09.6 |
HIP 45005 |
4.42 |
| 2026-09-24 12:00 |
09:10:20.73 |
+18:55:27.8 |
HIP 45005 |
5.24 |
| 2026-09-25 00:00 |
09:10:25.01 |
+18:55:46.6 |
HIP 45005 |
6.12 |
| 2026-09-25 12:00 |
09:10:29.18 |
+18:56:05.9 |
HIP 45074 |
6.34 |
| 2026-09-26 00:00 |
09:10:33.25 |
+18:56:25.8 |
HIP 45074 |
5.67 |
| 2026-09-26 12:00 |
09:10:37.22 |
+18:56:46.2 |
HIP 45074 |
5.14 |
| 2026-09-27 00:00 |
09:10:41.07 |
+18:57:07.3 |
HIP 45074 |
4.78 |
| 2026-09-27 12:00 |
09:10:44.82 |
+18:57:28.9 |
HIP 45074 |
4.62 |
| 2026-09-28 00:00 |
09:10:48.45 |
+18:57:51.1 |
HIP 45074 |
4.67 |
| 2026-09-28 12:00 |
09:10:51.98 |
+18:58:13.9 |
HIP 45074 |
4.92 |
| 2026-09-29 00:00 |
09:10:55.40 |
+18:58:37.3 |
HIP 45074 |
5.32 |
| 2026-09-29 12:00 |
09:10:58.70 |
+18:59:01.3 |
HIP 45074 |
5.84 |
| 2026-09-30 00:00 |
09:11:01.89 |
+18:59:25.9 |
HIP 45074 |
6.44 |
| 2026-09-30 12:00 |
09:11:04.97 |
+18:59:51.1 |
HIP 45074 |
7.09 |
| 2026-10-01 00:00 |
09:11:07.93 |
+19:00:16.9 |
HIP 45074 |
7.77 |
| 2026-10-01 12:00 |
09:11:10.77 |
+19:00:43.3 |
HIP 45074 |
8.48 |
| 2026-10-02 00:00 |
09:11:13.50 |
+19:01:10.4 |
HIP 45074 |
9.19 |
| 2026-10-02 12:00 |
09:11:16.11 |
+19:01:38.1 |
HIP 45074 |
9.91 |
| 2026-10-03 00:00 |
09:11:18.60 |
+19:02:06.4 |
HIP 45074 |
10.63 |
| 2026-10-03 12:00 |
09:11:20.96 |
+19:02:35.3 |
HIP 45074 |
11.34 |
| 2026-10-04 00:00 |
09:11:23.21 |
+19:03:05.0 |
HIP 45074 |
12.05 |
| 2026-10-04 12:00 |
09:11:25.33 |
+19:03:35.2 |
HIP 45074 |
12.76 |
| 2026-10-05 00:00 |
09:11:27.33 |
+19:04:06.1 |
HIP 45074 |
13.45 |
| 2026-10-05 12:00 |
09:11:29.21 |
+19:04:37.7 |
HIP 45074 |
14.14 |
| 2026-10-06 00:00 |
09:11:30.96 |
+19:05:10.0 |
HIP 45074 |
14.82 |
| 2026-10-06 12:00 |
09:11:32.58 |
+19:05:42.9 |
HIP 45074 |
15.49 |
| 2026-10-07 00:00 |
09:11:34.07 |
+19:06:16.5 |
HIP 45074 |
16.15 |
| 2026-10-07 12:00 |
09:11:35.43 |
+19:06:50.8 |
HIP 45074 |
16.80 |
| 2026-10-08 00:00 |
09:11:36.67 |
+19:07:25.8 |
HIP 45074 |
17.44 |
| 2026-10-08 12:00 |
09:11:37.77 |
+19:08:01.5 |
HIP 45074 |
18.08 |
| 2026-10-09 00:00 |
09:11:38.74 |
+19:08:37.9 |
HIP 45074 |
18.70 |
| 2026-10-09 12:00 |
09:11:39.57 |
+19:09:14.9 |
HIP 45074 |
19.32 |
| 2026-10-10 00:00 |
09:11:40.27 |
+19:09:52.7 |
HIP 45074 |
19.94 |
| 2026-10-10 12:00 |
09:11:40.83 |
+19:10:31.2 |
HIP 45074 |
20.54 |
| 2026-10-11 00:00 |
09:11:41.26 |
+19:11:10.5 |
HIP 45074 |
21.15 |