メタデータ
| 項目 |
値 |
| Designation |
314P/Montani |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2016-10-07T20:49:44.149440Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:28:21Z |
| Obs used |
384 |
| NEO |
- |
| M1 |
12.600 |
| K1 |
5.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2011-10-21.0000000 |
| e |
0.41595010 |
| q (au) |
4.249163 |
| a (au) |
7.275343 |
| i (deg) |
3.976588 |
| Ω (om, deg) |
267.703383 |
| ω (w, deg) |
213.407905 |
| M (ma, deg) |
268.897663 |
等級
散乱 + 全体線形
$$
M_a = (10.942 + 2.639\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
10.942 |
| n |
2.639 |
| gf |
1.000 |
| gb |
-0.944 |
| 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) |
| 2026-03-26 00:00 |
20:22:08.52 |
-17:23:34.5 |
HIP 100471 |
6.76 |
| 2026-03-26 12:00 |
20:22:16.60 |
-17:22:59.5 |
HIP 100471 |
6.15 |
| 2026-03-27 00:00 |
20:22:24.60 |
-17:22:24.8 |
HIP 100471 |
6.16 |
| 2026-03-27 12:00 |
20:22:32.53 |
-17:21:50.2 |
HIP 100471 |
6.79 |
| 2026-03-28 00:00 |
20:22:40.38 |
-17:21:15.9 |
HIP 100471 |
7.86 |
| 2026-03-28 12:00 |
20:22:48.15 |
-17:20:41.8 |
HIP 100471 |
9.22 |
| 2026-03-29 00:00 |
20:22:55.85 |
-17:20:07.9 |
HIP 100471 |
10.74 |
| 2026-03-29 12:00 |
20:23:03.47 |
-17:19:34.2 |
HIP 100471 |
12.36 |
| 2026-03-30 00:00 |
20:23:11.01 |
-17:19:00.7 |
HIP 100471 |
14.03 |
| 2026-03-30 12:00 |
20:23:18.47 |
-17:18:27.4 |
HIP 100471 |
15.73 |
| 2026-03-31 00:00 |
20:23:25.85 |
-17:17:54.4 |
HIP 100471 |
17.46 |
| 2026-03-31 12:00 |
20:23:33.16 |
-17:17:21.6 |
HIP 100471 |
19.18 |
| 2026-04-01 00:00 |
20:23:40.38 |
-17:16:49.0 |
HIP 100650 |
20.29 |
| 2026-04-01 12:00 |
20:23:47.52 |
-17:16:16.6 |
HIP 100650 |
18.85 |
| 2026-04-02 00:00 |
20:23:54.59 |
-17:15:44.4 |
HIP 100650 |
17.50 |
| 2026-04-02 12:00 |
20:24:01.57 |
-17:15:12.5 |
HIP 100650 |
16.24 |
| 2026-04-03 00:00 |
20:24:08.47 |
-17:14:40.8 |
HIP 100650 |
15.09 |
| 2026-04-03 12:00 |
20:24:15.29 |
-17:14:09.4 |
HIP 100650 |
14.06 |
| 2026-04-04 00:00 |
20:24:22.03 |
-17:13:38.1 |
HIP 100650 |
13.19 |
| 2026-04-04 12:00 |
20:24:28.68 |
-17:13:07.2 |
HIP 100650 |
12.49 |
| 2026-04-05 00:00 |
20:24:35.26 |
-17:12:36.4 |
HIP 100650 |
11.99 |
| 2026-04-05 12:00 |
20:24:41.75 |
-17:12:05.9 |
HIP 100650 |
11.70 |
| 2026-04-06 00:00 |
20:24:48.15 |
-17:11:35.7 |
HIP 100650 |
11.63 |
| 2026-04-06 12:00 |
20:24:54.48 |
-17:11:05.7 |
HIP 100650 |
11.78 |
| 2026-04-07 00:00 |
20:25:00.72 |
-17:10:35.9 |
HIP 100650 |
12.13 |
| 2026-04-07 12:00 |
20:25:06.87 |
-17:10:06.4 |
HIP 100650 |
12.65 |
| 2026-04-08 00:00 |
20:25:12.94 |
-17:09:37.1 |
HIP 100650 |
13.33 |
| 2026-04-08 12:00 |
20:25:18.92 |
-17:09:08.1 |
HIP 100650 |
14.12 |
| 2026-04-09 00:00 |
20:25:24.82 |
-17:08:39.4 |
HIP 100650 |
15.01 |
| 2026-04-09 12:00 |
20:25:30.63 |
-17:08:10.9 |
HIP 100650 |
15.98 |
| 2026-04-10 00:00 |
20:25:36.36 |
-17:07:42.7 |
HIP 100650 |
16.99 |
| 2026-04-10 12:00 |
20:25:42.00 |
-17:07:14.7 |
HIP 100650 |
18.05 |
| 2026-04-11 00:00 |
20:25:47.55 |
-17:06:47.0 |
HIP 100817 |
19.05 |
| 2026-04-11 12:00 |
20:25:53.02 |
-17:06:19.6 |
HIP 100817 |
18.76 |
| 2026-04-12 00:00 |
20:25:58.39 |
-17:05:52.4 |
HIP 100817 |
18.57 |
| 2026-04-12 12:00 |
20:26:03.68 |
-17:05:25.5 |
HIP 100817 |
18.48 |
| 2026-04-13 00:00 |
20:26:08.88 |
-17:04:58.9 |
HIP 100817 |
18.50 |
| 2026-04-13 12:00 |
20:26:13.99 |
-17:04:32.6 |
HIP 100817 |
18.60 |
| 2026-04-14 00:00 |
20:26:19.01 |
-17:04:06.6 |
HIP 100817 |
18.80 |
| 2026-04-14 12:00 |
20:26:23.94 |
-17:03:40.8 |
HIP 100817 |
19.07 |
| 2026-04-15 00:00 |
20:26:28.78 |
-17:03:15.3 |
HIP 100817 |
19.42 |
| 2026-04-15 12:00 |
20:26:33.53 |
-17:02:50.1 |
HIP 100817 |
19.83 |
| 2026-04-16 00:00 |
20:26:38.19 |
-17:02:25.2 |
HIP 100817 |
20.30 |