メタデータ
| 項目 |
値 |
| Designation |
C/2025 L2 (MAPS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2025-12-20T15:54:42.508800Z |
| Orbit solution date (soln_date, UTC) |
2026-06-09T11:12:32Z |
| Obs used |
380 |
| NEO |
- |
| M1 |
10.600 |
| 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) |
2025-09-03.0000000 |
| e |
0.99440101 |
| q (au) |
2.833648 |
| a (au) |
506.099789 |
| i (deg) |
86.582791 |
| Ω (om, deg) |
134.985038 |
| ω (w, deg) |
232.642996 |
| M (ma, deg) |
359.990593 |
等級
散乱 + 全体線形
$$
M_a = (9.200 + 5.040\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
9.200 |
| n |
5.040 |
| 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) |
| 2026-07-29 00:00 |
07:28:33.50 |
-37:42:39.2 |
HIP 36304 |
6.30 |
| 2026-07-29 12:00 |
07:29:18.64 |
-37:41:14.6 |
HIP 36304 |
13.24 |
| 2026-07-30 00:00 |
07:30:03.58 |
-37:39:52.0 |
HIP 36515 |
20.97 |
| 2026-07-30 12:00 |
07:30:48.33 |
-37:38:31.3 |
HIP 36515 |
18.19 |
| 2026-07-31 00:00 |
07:31:32.87 |
-37:37:12.7 |
HIP 36515 |
19.58 |
| 2026-07-31 12:00 |
07:32:17.22 |
-37:35:56.1 |
HIP 36515 |
24.39 |
| 2026-08-01 00:00 |
07:33:01.37 |
-37:34:41.5 |
HIP 36792 |
19.70 |
| 2026-08-01 12:00 |
07:33:45.32 |
-37:33:28.8 |
HIP 36792 |
14.72 |
| 2026-08-02 00:00 |
07:34:29.07 |
-37:32:18.1 |
HIP 36926 |
13.43 |
| 2026-08-02 12:00 |
07:35:12.63 |
-37:31:09.4 |
HIP 36926 |
6.55 |
| 2026-08-03 00:00 |
07:35:55.99 |
-37:30:02.7 |
HIP 36963 |
3.30 |
| 2026-08-03 12:00 |
07:36:39.15 |
-37:28:57.9 |
HIP 36963 |
8.93 |
| 2026-08-04 00:00 |
07:37:22.12 |
-37:27:55.1 |
HIP 36963 |
17.22 |
| 2026-08-04 12:00 |
07:38:04.90 |
-37:26:54.3 |
HIP 37348 |
23.07 |
| 2026-08-05 00:00 |
07:38:47.47 |
-37:25:55.4 |
HIP 37348 |
14.60 |
| 2026-08-05 12:00 |
07:39:29.85 |
-37:24:58.4 |
HIP 37348 |
6.29 |
| 2026-08-06 00:00 |
07:40:12.04 |
-37:24:03.4 |
HIP 37348 |
3.05 |
| 2026-08-06 12:00 |
07:40:54.03 |
-37:23:10.3 |
HIP 37348 |
10.97 |
| 2026-08-07 00:00 |
07:41:35.83 |
-37:22:19.2 |
HIP 37348 |
19.26 |
| 2026-08-07 12:00 |
07:42:17.43 |
-37:21:29.9 |
HIP 37653 |
22.48 |
| 2026-08-08 00:00 |
07:42:58.83 |
-37:20:42.7 |
HIP 37653 |
17.05 |
| 2026-08-08 12:00 |
07:43:40.04 |
-37:19:57.3 |
HIP 37711 |
11.76 |
| 2026-08-09 00:00 |
07:44:21.06 |
-37:19:13.8 |
HIP 37711 |
9.54 |
| 2026-08-09 12:00 |
07:45:01.88 |
-37:18:32.2 |
HIP 37711 |
13.34 |
| 2026-08-10 00:00 |
07:45:42.50 |
-37:17:52.6 |
HIP 37838 |
18.15 |
| 2026-08-10 12:00 |
07:46:22.93 |
-37:17:14.8 |
HIP 38011 |
12.54 |
| 2026-08-11 00:00 |
07:47:03.17 |
-37:16:38.9 |
HIP 38011 |
5.01 |
| 2026-08-11 12:00 |
07:47:43.20 |
-37:16:04.9 |
HIP 38011 |
4.61 |
| 2026-08-12 00:00 |
07:48:23.04 |
-37:15:32.7 |
HIP 38011 |
11.99 |
| 2026-08-12 12:00 |
07:49:02.69 |
-37:15:02.5 |
HIP 38011 |
19.77 |
| 2026-08-13 00:00 |
07:49:42.14 |
-37:14:34.0 |
HIP 38011 |
27.57 |
| 2026-08-13 12:00 |
07:50:21.39 |
-37:14:07.4 |
HIP 38365 |
27.62 |
| 2026-08-14 00:00 |
07:51:00.44 |
-37:13:42.6 |
HIP 38365 |
25.09 |
| 2026-08-14 12:00 |
07:51:39.30 |
-37:13:19.7 |
HIP 38475 |
23.24 |
| 2026-08-15 00:00 |
07:52:17.96 |
-37:12:58.6 |
HIP 38475 |
19.28 |
| 2026-08-15 12:00 |
07:52:56.43 |
-37:12:39.2 |
HIP 38475 |
17.99 |
| 2026-08-16 00:00 |
07:53:34.70 |
-37:12:21.7 |
HIP 38544 |
16.19 |
| 2026-08-16 12:00 |
07:54:12.76 |
-37:12:05.9 |
HIP 38596 |
17.18 |
| 2026-08-17 00:00 |
07:54:50.64 |
-37:11:52.0 |
HIP 38596 |
19.08 |
| 2026-08-17 12:00 |
07:55:28.31 |
-37:11:39.7 |
HIP 38596 |
23.33 |
| 2026-08-18 00:00 |
07:56:05.79 |
-37:11:29.3 |
HIP 38842 |
19.69 |
| 2026-08-18 12:00 |
07:56:43.07 |
-37:11:20.5 |
HIP 38842 |
17.07 |
| 2026-08-19 00:00 |
07:57:20.15 |
-37:11:13.5 |
HIP 38842 |
17.51 |