C/2025 L2 (MAPS)
メタデータ
| 項目 |
値 |
| Designation |
C/2025 L2 (MAPS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2025-12-20T15:56:09.288960Z |
| Orbit solution date (soln_date, UTC) |
2025-12-12T11:12:30Z |
| Obs used |
361 |
| NEO |
- |
| M1 |
10.700 |
| K1 |
11.500 |
| 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) |
2025-08-21.0000000 |
| e |
0.99439023 |
| q (au) |
2.833632 |
| a (au) |
505.124334 |
| i (deg) |
86.582193 |
| Ω (om, deg) |
134.984833 |
| ω (w, deg) |
232.643410 |
| M (ma, deg) |
359.989437 |
等級
散乱 + 全体線形
$$
M_a = (9.186 + 5.095\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
9.186 |
| n |
5.095 |
| 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) |
| 2026-02-03 00:00 |
23:19:57.08 |
-60:45:46.9 |
HIP 115123 |
15.86 |
| 2026-02-03 12:00 |
23:21:30.79 |
-60:45:12.2 |
HIP 115488 |
22.32 |
| 2026-02-04 00:00 |
23:23:04.80 |
-60:44:35.8 |
HIP 115488 |
16.99 |
| 2026-02-04 12:00 |
23:24:39.10 |
-60:43:57.8 |
HIP 115488 |
18.52 |
| 2026-02-05 00:00 |
23:26:13.70 |
-60:43:18.1 |
HIP 115785 |
8.88 |
| 2026-02-05 12:00 |
23:27:48.58 |
-60:42:36.7 |
HIP 115785 |
3.09 |
| 2026-02-06 00:00 |
23:29:23.75 |
-60:41:53.5 |
HIP 115948 |
3.08 |
| 2026-02-06 12:00 |
23:30:59.21 |
-60:41:08.6 |
HIP 115948 |
11.74 |
| 2026-02-07 00:00 |
23:32:34.95 |
-60:40:22.0 |
HIP 116345 |
17.43 |
| 2026-02-07 12:00 |
23:34:10.97 |
-60:39:33.6 |
HIP 116345 |
11.42 |
| 2026-02-08 00:00 |
23:35:47.27 |
-60:38:43.4 |
HIP 116536 |
14.71 |
| 2026-02-08 12:00 |
23:37:23.84 |
-60:37:51.3 |
HIP 116536 |
12.54 |
| 2026-02-09 00:00 |
23:39:00.69 |
-60:36:57.5 |
HIP 116710 |
19.01 |
| 2026-02-09 12:00 |
23:40:37.81 |
-60:36:01.9 |
HIP 116710 |
21.12 |
| 2026-02-10 00:00 |
23:42:15.19 |
-60:35:04.4 |
HIP 116710 |
28.64 |
| 2026-02-10 12:00 |
23:43:52.84 |
-60:34:05.0 |
HIP 117264 |
22.92 |
| 2026-02-11 00:00 |
23:45:30.75 |
-60:33:03.7 |
HIP 117264 |
14.70 |
| 2026-02-11 12:00 |
23:47:08.91 |
-60:32:00.6 |
HIP 117264 |
14.06 |
| 2026-02-12 00:00 |
23:48:47.34 |
-60:30:55.5 |
HIP 117470 |
15.12 |
| 2026-02-12 12:00 |
23:50:26.01 |
-60:29:48.6 |
HIP 117470 |
18.47 |
| 2026-02-13 00:00 |
23:52:04.94 |
-60:28:39.7 |
HIP 117878 |
20.23 |
| 2026-02-13 12:00 |
23:53:44.11 |
-60:27:28.8 |
HIP 117878 |
9.19 |
| 2026-02-14 00:00 |
23:55:23.52 |
-60:26:16.0 |
HIP 117878 |
7.87 |
| 2026-02-14 12:00 |
23:57:03.17 |
-60:25:01.2 |
HIP 118069 |
0.81 |
| 2026-02-15 00:00 |
23:58:43.06 |
-60:23:44.4 |
HIP 118069 |
12.34 |
| 2026-02-15 12:00 |
00:00:23.18 |
-60:22:25.6 |
HIP 118069 |
24.77 |
| 2026-02-16 00:00 |
00:02:03.52 |
-60:21:04.9 |
HIP 243 |
21.61 |
| 2026-02-16 12:00 |
00:03:44.10 |
-60:19:42.0 |
HIP 243 |
22.45 |
| 2026-02-17 00:00 |
00:05:24.89 |
-60:18:17.2 |
HIP 594 |
19.40 |
| 2026-02-17 12:00 |
00:07:05.90 |
-60:16:50.2 |
HIP 594 |
12.62 |
| 2026-02-18 00:00 |
00:08:47.13 |
-60:15:21.3 |
HIP 713 |
0.62 |
| 2026-02-18 12:00 |
00:10:28.56 |
-60:13:50.2 |
HIP 713 |
12.41 |
| 2026-02-19 00:00 |
00:12:10.20 |
-60:12:17.1 |
HIP 1081 |
20.43 |
| 2026-02-19 12:00 |
00:13:52.05 |
-60:10:41.8 |
HIP 1081 |
16.66 |
| 2026-02-20 00:00 |
00:15:34.09 |
-60:09:04.5 |
HIP 1399 |
18.83 |
| 2026-02-20 12:00 |
00:17:16.32 |
-60:07:25.0 |
HIP 1399 |
10.50 |
| 2026-02-21 00:00 |
00:18:58.75 |
-60:05:43.3 |
HIP 1399 |
14.04 |
| 2026-02-21 12:00 |
00:20:41.36 |
-60:03:59.6 |
HIP 1817 |
21.73 |
| 2026-02-22 00:00 |
00:22:24.15 |
-60:02:13.6 |
HIP 1817 |
15.51 |
| 2026-02-22 12:00 |
00:24:07.12 |
-60:00:25.5 |
HIP 1817 |
18.54 |
| 2026-02-23 00:00 |
00:25:50.26 |
-59:58:35.2 |
HIP 2112 |
9.45 |
| 2026-02-23 12:00 |
00:27:33.57 |
-59:56:42.7 |
HIP 2112 |
6.87 |
| 2026-02-24 00:00 |
00:29:17.04 |
-59:54:48.0 |
HIP 2349 |
8.89 |