メタデータ
| 項目 |
値 |
| Designation |
C/2025 L2 (MAPS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2025-12-20T15:54:24.071040Z |
| Orbit solution date (soln_date, UTC) |
2026-05-05T09:12:15Z |
| Obs used |
376 |
| NEO |
- |
| M1 |
10.500 |
| K1 |
11.750 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2025-06-02T07:22:26.400000Z |
| Discovery magnitude (MPC) |
18.70 G |
| Discovery observatory (MPC) |
W94 · MAPS, San Pedro de Atacama |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2025-08-31.0000000 |
| e |
0.99440208 |
| q (au) |
2.833647 |
| a (au) |
506.196730 |
| i (deg) |
86.582701 |
| Ω (om, deg) |
134.985001 |
| ω (w, deg) |
232.642954 |
| M (ma, deg) |
359.990337 |
等級
散乱 + 全体線形
$$
M_a = (9.162 + 5.090\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
9.162 |
| n |
5.090 |
| gf |
1.000 |
| 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
ファインディングチャート
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
04:44:47.72 |
-48:10:02.4 |
HIP 22142 |
13.60 |
| 2026-05-12 12:00 |
04:46:10.89 |
-48:04:04.3 |
HIP 22142 |
3.44 |
| 2026-05-13 00:00 |
04:47:33.77 |
-47:58:06.6 |
HIP 22142 |
17.18 |
| 2026-05-13 12:00 |
04:48:56.37 |
-47:52:09.5 |
HIP 22332 |
23.06 |
| 2026-05-14 00:00 |
04:50:18.68 |
-47:46:12.8 |
HIP 22547 |
19.59 |
| 2026-05-14 12:00 |
04:51:40.71 |
-47:40:16.8 |
HIP 22547 |
24.01 |
| 2026-05-15 00:00 |
04:53:02.45 |
-47:34:21.3 |
HIP 22598 |
30.94 |
| 2026-05-15 12:00 |
04:54:23.90 |
-47:28:26.5 |
HIP 22598 |
34.97 |
| 2026-05-16 00:00 |
04:55:45.07 |
-47:22:32.3 |
HIP 23051 |
20.14 |
| 2026-05-16 12:00 |
04:57:05.96 |
-47:16:38.8 |
HIP 23051 |
5.47 |
| 2026-05-17 00:00 |
04:58:26.56 |
-47:10:46.0 |
HIP 23142 |
9.17 |
| 2026-05-17 12:00 |
04:59:46.87 |
-47:04:54.0 |
HIP 23142 |
17.78 |
| 2026-05-18 00:00 |
05:01:06.90 |
-46:59:02.8 |
HIP 23290 |
20.39 |
| 2026-05-18 12:00 |
05:02:26.64 |
-46:53:12.4 |
HIP 23444 |
22.01 |
| 2026-05-19 00:00 |
05:03:46.10 |
-46:47:22.9 |
HIP 23444 |
21.68 |
| 2026-05-19 12:00 |
05:05:05.27 |
-46:41:34.2 |
HIP 23870 |
28.11 |
| 2026-05-20 00:00 |
05:06:24.16 |
-46:35:46.4 |
HIP 23870 |
17.37 |
| 2026-05-20 12:00 |
05:07:42.76 |
-46:29:59.6 |
HIP 23881 |
13.92 |
| 2026-05-21 00:00 |
05:09:01.07 |
-46:24:13.7 |
HIP 23881 |
14.15 |
| 2026-05-21 12:00 |
05:10:19.10 |
-46:18:28.7 |
HIP 24095 |
4.24 |
| 2026-05-22 00:00 |
05:11:36.85 |
-46:12:44.8 |
HIP 24095 |
11.19 |
| 2026-05-22 12:00 |
05:12:54.31 |
-46:07:01.9 |
HIP 24364 |
25.56 |
| 2026-05-23 00:00 |
05:14:11.49 |
-46:01:20.1 |
HIP 24432 |
14.29 |
| 2026-05-23 12:00 |
05:15:28.38 |
-45:55:39.3 |
HIP 24603 |
12.10 |
| 2026-05-24 00:00 |
05:16:44.99 |
-45:49:59.6 |
HIP 24603 |
4.99 |
| 2026-05-24 12:00 |
05:18:01.32 |
-45:44:21.1 |
HIP 24733 |
9.84 |
| 2026-05-25 00:00 |
05:19:17.36 |
-45:38:43.7 |
HIP 24733 |
11.67 |
| 2026-05-25 12:00 |
05:20:33.12 |
-45:33:07.4 |
HIP 25020 |
15.70 |
| 2026-05-26 00:00 |
05:21:48.61 |
-45:27:32.4 |
HIP 25020 |
8.09 |
| 2026-05-26 12:00 |
05:23:03.81 |
-45:21:58.5 |
HIP 25122 |
5.08 |
| 2026-05-27 00:00 |
05:24:18.73 |
-45:16:25.9 |
HIP 25213 |
16.33 |
| 2026-05-27 12:00 |
05:25:33.37 |
-45:10:54.5 |
HIP 25461 |
14.56 |
| 2026-05-28 00:00 |
05:26:47.74 |
-45:05:24.4 |
HIP 25461 |
2.58 |
| 2026-05-28 12:00 |
05:28:01.82 |
-44:59:55.6 |
HIP 25489 |
12.79 |
| 2026-05-29 00:00 |
05:29:15.63 |
-44:54:28.2 |
HIP 25723 |
8.59 |
| 2026-05-29 12:00 |
05:30:29.17 |
-44:49:02.0 |
HIP 25723 |
9.96 |
| 2026-05-30 00:00 |
05:31:42.42 |
-44:43:37.3 |
HIP 25723 |
22.86 |
| 2026-05-30 12:00 |
05:32:55.41 |
-44:38:13.9 |
HIP 25723 |
36.62 |
| 2026-05-31 00:00 |
05:34:08.12 |
-44:32:51.9 |
HIP 26260 |
33.52 |
| 2026-05-31 12:00 |
05:35:20.55 |
-44:27:31.3 |
HIP 26423 |
24.16 |
| 2026-06-01 00:00 |
05:36:32.72 |
-44:22:12.2 |
HIP 26423 |
17.49 |
| 2026-06-01 12:00 |
05:37:44.61 |
-44:16:54.5 |
HIP 26507 |
12.57 |
| 2026-06-02 00:00 |
05:38:56.24 |
-44:11:38.3 |
HIP 26586 |
5.22 |