メタデータ
| 項目 |
値 |
| Designation |
C/2000 A1 (Montani) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2000-07-13T05:54:09.682560Z |
| Orbit solution date (soln_date, UTC) |
2025-09-09T12:42:30Z |
| Obs used |
135 |
| NEO |
- |
| M1 |
4.400 |
| K1 |
10.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2000-07-31.0000000 |
| e |
1.00401459 |
| q (au) |
9.743100 |
| a (au) |
-2426.925294 |
| i (deg) |
24.541886 |
| Ω (om, deg) |
111.835138 |
| ω (w, deg) |
14.271337 |
| M (ma, deg) |
0.000146 |
等級
散乱 + 全体線形
$$
M_a = (8.448 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
8.448 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.861 |
| 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) |
| 2026-06-01 00:00 |
16:47:21.86 |
-05:13:12.8 |
HIP 82301 |
27.92 |
| 2026-06-01 12:00 |
16:47:19.28 |
-05:13:09.1 |
HIP 82301 |
28.45 |
| 2026-06-02 00:00 |
16:47:16.71 |
-05:13:05.4 |
HIP 82301 |
28.98 |
| 2026-06-02 12:00 |
16:47:14.13 |
-05:13:01.9 |
HIP 82301 |
29.51 |
| 2026-06-03 00:00 |
16:47:11.55 |
-05:12:58.4 |
HIP 82301 |
30.05 |
| 2026-06-03 12:00 |
16:47:08.97 |
-05:12:55.1 |
HIP 82301 |
30.60 |
| 2026-06-04 00:00 |
16:47:06.39 |
-05:12:51.9 |
HIP 82301 |
31.15 |
| 2026-06-04 12:00 |
16:47:03.82 |
-05:12:48.7 |
HIP 82301 |
31.71 |
| 2026-06-05 00:00 |
16:47:01.24 |
-05:12:45.7 |
HIP 82301 |
32.26 |
| 2026-06-05 12:00 |
16:46:58.66 |
-05:12:42.8 |
HIP 82301 |
32.83 |
| 2026-06-06 00:00 |
16:46:56.08 |
-05:12:40.0 |
HIP 82301 |
33.39 |
| 2026-06-06 12:00 |
16:46:53.51 |
-05:12:37.3 |
HIP 82301 |
33.96 |
| 2026-06-07 00:00 |
16:46:50.93 |
-05:12:34.7 |
HIP 82301 |
34.53 |
| 2026-06-07 12:00 |
16:46:48.36 |
-05:12:32.2 |
HIP 82301 |
35.11 |
| 2026-06-08 00:00 |
16:46:45.79 |
-05:12:29.9 |
HIP 82301 |
35.69 |
| 2026-06-08 12:00 |
16:46:43.22 |
-05:12:27.6 |
HIP 82301 |
36.27 |
| 2026-06-09 00:00 |
16:46:40.65 |
-05:12:25.5 |
HIP 82301 |
36.85 |
| 2026-06-09 12:00 |
16:46:38.08 |
-05:12:23.4 |
HIP 82301 |
37.43 |
| 2026-06-10 00:00 |
16:46:35.52 |
-05:12:21.5 |
HIP 82301 |
38.02 |
| 2026-06-10 12:00 |
16:46:32.96 |
-05:12:19.7 |
HIP 82301 |
38.61 |
| 2026-06-11 00:00 |
16:46:30.40 |
-05:12:18.0 |
HIP 82301 |
39.20 |
| 2026-06-11 12:00 |
16:46:27.85 |
-05:12:16.4 |
HIP 82301 |
39.79 |
| 2026-06-12 00:00 |
16:46:25.29 |
-05:12:14.9 |
HIP 82301 |
40.38 |
| 2026-06-12 12:00 |
16:46:22.75 |
-05:12:13.5 |
HIP 81952 |
40.94 |
| 2026-06-13 00:00 |
16:46:20.20 |
-05:12:12.2 |
HIP 81952 |
40.51 |
| 2026-06-13 12:00 |
16:46:17.66 |
-05:12:11.1 |
HIP 81952 |
40.08 |
| 2026-06-14 00:00 |
16:46:15.12 |
-05:12:10.1 |
HIP 81952 |
39.66 |
| 2026-06-14 12:00 |
16:46:12.59 |
-05:12:09.2 |
HIP 81952 |
39.25 |
| 2026-06-15 00:00 |
16:46:10.07 |
-05:12:08.3 |
HIP 81952 |
38.84 |
| 2026-06-15 12:00 |
16:46:07.54 |
-05:12:07.7 |
HIP 81952 |
38.43 |
| 2026-06-16 00:00 |
16:46:05.03 |
-05:12:07.1 |
HIP 81952 |
38.04 |
| 2026-06-16 12:00 |
16:46:02.51 |
-05:12:06.6 |
HIP 81952 |
37.64 |
| 2026-06-17 00:00 |
16:46:00.01 |
-05:12:06.3 |
HIP 81952 |
37.25 |
| 2026-06-17 12:00 |
16:45:57.51 |
-05:12:06.0 |
HIP 81952 |
36.87 |
| 2026-06-18 00:00 |
16:45:55.01 |
-05:12:05.9 |
HIP 81952 |
36.50 |
| 2026-06-18 12:00 |
16:45:52.52 |
-05:12:05.9 |
HIP 81952 |
36.13 |
| 2026-06-19 00:00 |
16:45:50.04 |
-05:12:06.0 |
HIP 81952 |
35.76 |
| 2026-06-19 12:00 |
16:45:47.57 |
-05:12:06.2 |
HIP 81952 |
35.41 |
| 2026-06-20 00:00 |
16:45:45.10 |
-05:12:06.6 |
HIP 81952 |
35.06 |
| 2026-06-20 12:00 |
16:45:42.64 |
-05:12:07.0 |
HIP 81952 |
34.71 |
| 2026-06-21 00:00 |
16:45:40.18 |
-05:12:07.6 |
HIP 81952 |
34.38 |
| 2026-06-21 12:00 |
16:45:37.74 |
-05:12:08.3 |
HIP 81952 |
34.05 |
| 2026-06-22 00:00 |
16:45:35.30 |
-05:12:09.1 |
HIP 81952 |
33.72 |