メタデータ
| 項目 |
値 |
| Designation |
C/2024 L2 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2025-06-18T07:08:48.744960Z |
| Orbit solution date (soln_date, UTC) |
2025-01-14T17:42:13Z |
| Obs used |
30 |
| NEO |
- |
| M1 |
6.800 |
| K1 |
9.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-06-13T12:42:08.496000Z |
| Discovery magnitude (MPC) |
20.48 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2024-05-31.0000000 |
| e |
1.00417278 |
| q (au) |
8.325893 |
| a (au) |
-1995.285740 |
| i (deg) |
139.583969 |
| Ω (om, deg) |
266.182400 |
| ω (w, deg) |
345.937928 |
| M (ma, deg) |
-0.004239 |
等級
散乱 + 全体線形
$$
M_a = (0.284 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
0.284 |
| n |
6.000 |
| gf |
0.997 |
| gb |
-1.000 |
| 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) |
| 2026-05-12 00:00 |
17:45:34.32 |
-20:04:13.8 |
HIP 86926 |
8.17 |
| 2026-05-12 12:00 |
17:45:15.42 |
-20:02:47.9 |
HIP 86926 |
11.14 |
| 2026-05-13 00:00 |
17:44:56.42 |
-20:01:21.8 |
HIP 86926 |
15.02 |
| 2026-05-13 12:00 |
17:44:37.33 |
-19:59:55.5 |
HIP 86926 |
19.29 |
| 2026-05-14 00:00 |
17:44:18.14 |
-19:58:29.1 |
HIP 86686 |
22.94 |
| 2026-05-14 12:00 |
17:43:58.86 |
-19:57:02.5 |
HIP 86686 |
18.24 |
| 2026-05-15 00:00 |
17:43:39.49 |
-19:55:35.8 |
HIP 86686 |
13.55 |
| 2026-05-15 12:00 |
17:43:20.03 |
-19:54:08.9 |
HIP 86686 |
8.93 |
| 2026-05-16 00:00 |
17:43:00.48 |
-19:52:41.9 |
HIP 86686 |
4.66 |
| 2026-05-16 12:00 |
17:42:40.85 |
-19:51:14.7 |
HIP 86686 |
3.18 |
| 2026-05-17 00:00 |
17:42:21.13 |
-19:49:47.3 |
HIP 86686 |
6.75 |
| 2026-05-17 12:00 |
17:42:01.33 |
-19:48:19.8 |
HIP 86686 |
11.35 |
| 2026-05-18 00:00 |
17:41:41.44 |
-19:46:52.2 |
HIP 86686 |
16.13 |
| 2026-05-18 12:00 |
17:41:21.48 |
-19:45:24.4 |
HIP 86555 |
17.98 |
| 2026-05-19 00:00 |
17:41:01.44 |
-19:43:56.5 |
HIP 86555 |
16.95 |
| 2026-05-19 12:00 |
17:40:41.32 |
-19:42:28.5 |
HIP 86555 |
17.33 |
| 2026-05-20 00:00 |
17:40:21.12 |
-19:41:00.3 |
HIP 86555 |
19.05 |
| 2026-05-20 12:00 |
17:40:00.86 |
-19:39:31.9 |
HIP 86365 |
17.80 |
| 2026-05-21 00:00 |
17:39:40.52 |
-19:38:03.4 |
HIP 86365 |
12.84 |
| 2026-05-21 12:00 |
17:39:20.11 |
-19:36:34.8 |
HIP 86365 |
7.92 |
| 2026-05-22 00:00 |
17:38:59.63 |
-19:35:06.1 |
HIP 86365 |
3.34 |
| 2026-05-22 12:00 |
17:38:39.08 |
-19:33:37.3 |
HIP 86365 |
3.25 |
| 2026-05-23 00:00 |
17:38:18.48 |
-19:32:08.3 |
HIP 86365 |
7.84 |
| 2026-05-23 12:00 |
17:37:57.80 |
-19:30:39.2 |
HIP 86365 |
12.82 |
| 2026-05-24 00:00 |
17:37:37.07 |
-19:29:10.0 |
HIP 86365 |
17.88 |
| 2026-05-24 12:00 |
17:37:16.27 |
-19:27:40.6 |
HIP 86365 |
22.97 |
| 2026-05-25 00:00 |
17:36:55.42 |
-19:26:11.1 |
HIP 86208 |
26.71 |
| 2026-05-25 12:00 |
17:36:34.51 |
-19:24:41.6 |
HIP 86208 |
25.98 |
| 2026-05-26 00:00 |
17:36:13.55 |
-19:23:11.9 |
HIP 86208 |
26.27 |
| 2026-05-26 12:00 |
17:35:52.53 |
-19:21:42.1 |
HIP 85965 |
26.84 |
| 2026-05-27 00:00 |
17:35:31.46 |
-19:20:12.2 |
HIP 85965 |
21.71 |
| 2026-05-27 12:00 |
17:35:10.34 |
-19:18:42.2 |
HIP 85965 |
16.61 |
| 2026-05-28 00:00 |
17:34:49.17 |
-19:17:12.1 |
HIP 85965 |
11.58 |
| 2026-05-28 12:00 |
17:34:27.96 |
-19:15:41.9 |
HIP 85965 |
6.84 |
| 2026-05-29 00:00 |
17:34:06.70 |
-19:14:11.6 |
HIP 85965 |
3.75 |
| 2026-05-29 12:00 |
17:33:45.40 |
-19:12:41.2 |
HIP 85965 |
6.03 |
| 2026-05-30 00:00 |
17:33:24.06 |
-19:11:10.7 |
HIP 85965 |
10.67 |
| 2026-05-30 12:00 |
17:33:02.67 |
-19:09:40.2 |
HIP 85965 |
15.72 |
| 2026-05-31 00:00 |
17:32:41.25 |
-19:08:09.5 |
HIP 85965 |
20.89 |
| 2026-05-31 12:00 |
17:32:19.80 |
-19:06:38.8 |
HIP 85690 |
23.39 |
| 2026-06-01 00:00 |
17:31:58.30 |
-19:05:08.0 |
HIP 85690 |
18.40 |
| 2026-06-01 12:00 |
17:31:36.78 |
-19:03:37.2 |
HIP 85690 |
13.63 |
| 2026-06-02 00:00 |
17:31:15.23 |
-19:02:06.2 |
HIP 85690 |
9.44 |