メタデータ
| 項目 |
値 |
| Designation |
C/2014 F1 (Hill) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2013-10-04T20:00:02.148480Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:50Z |
| Obs used |
190 |
| NEO |
- |
| M1 |
13.700 |
| K1 |
4.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2014-04-19.0000000 |
| e |
0.99907518 |
| q (au) |
3.496337 |
| a (au) |
3780.558013 |
| i (deg) |
108.253050 |
| Ω (om, deg) |
239.902413 |
| ω (w, deg) |
8.242943 |
| M (ma, deg) |
0.000832 |
等級
散乱 + 全体線形
$$
M_a = (12.874 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
12.874 |
| n |
2.000 |
| gf |
0.801 |
| gb |
-0.500 |
| k |
1.000 |
| δ90 |
1.000 |
| 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 |
04:14:08.60 |
+52:14:43.1 |
HIP 19734 |
3.12 |
| 2026-06-01 12:00 |
04:14:15.09 |
+52:14:49.3 |
HIP 19734 |
4.09 |
| 2026-06-02 00:00 |
04:14:21.57 |
+52:14:55.6 |
HIP 19734 |
5.08 |
| 2026-06-02 12:00 |
04:14:28.05 |
+52:15:02.3 |
HIP 19734 |
6.07 |
| 2026-06-03 00:00 |
04:14:34.52 |
+52:15:09.1 |
HIP 19734 |
7.06 |
| 2026-06-03 12:00 |
04:14:40.98 |
+52:15:16.2 |
HIP 19734 |
8.05 |
| 2026-06-04 00:00 |
04:14:47.44 |
+52:15:23.6 |
HIP 19734 |
9.04 |
| 2026-06-04 12:00 |
04:14:53.89 |
+52:15:31.1 |
HIP 19734 |
10.03 |
| 2026-06-05 00:00 |
04:15:00.33 |
+52:15:38.9 |
HIP 19734 |
11.02 |
| 2026-06-05 12:00 |
04:15:06.76 |
+52:15:47.0 |
HIP 19734 |
12.01 |
| 2026-06-06 00:00 |
04:15:13.19 |
+52:15:55.2 |
HIP 19734 |
12.99 |
| 2026-06-06 12:00 |
04:15:19.60 |
+52:16:03.7 |
HIP 19734 |
13.98 |
| 2026-06-07 00:00 |
04:15:26.01 |
+52:16:12.5 |
HIP 19734 |
14.97 |
| 2026-06-07 12:00 |
04:15:32.41 |
+52:16:21.4 |
HIP 19734 |
15.96 |
| 2026-06-08 00:00 |
04:15:38.79 |
+52:16:30.6 |
HIP 19734 |
16.94 |
| 2026-06-08 12:00 |
04:15:45.17 |
+52:16:40.0 |
HIP 19734 |
17.93 |
| 2026-06-09 00:00 |
04:15:51.53 |
+52:16:49.7 |
HIP 20035 |
18.15 |
| 2026-06-09 12:00 |
04:15:57.89 |
+52:16:59.5 |
HIP 20035 |
17.19 |
| 2026-06-10 00:00 |
04:16:04.23 |
+52:17:09.6 |
HIP 20028 |
16.23 |
| 2026-06-10 12:00 |
04:16:10.56 |
+52:17:19.9 |
HIP 20028 |
15.26 |
| 2026-06-11 00:00 |
04:16:16.88 |
+52:17:30.5 |
HIP 20028 |
14.29 |
| 2026-06-11 12:00 |
04:16:23.19 |
+52:17:41.2 |
HIP 20028 |
13.33 |
| 2026-06-12 00:00 |
04:16:29.48 |
+52:17:52.2 |
HIP 20028 |
12.36 |
| 2026-06-12 12:00 |
04:16:35.76 |
+52:18:03.4 |
HIP 20028 |
11.40 |
| 2026-06-13 00:00 |
04:16:42.02 |
+52:18:14.8 |
HIP 20028 |
10.45 |
| 2026-06-13 12:00 |
04:16:48.27 |
+52:18:26.4 |
HIP 20028 |
9.49 |
| 2026-06-14 00:00 |
04:16:54.51 |
+52:18:38.3 |
HIP 20028 |
8.55 |
| 2026-06-14 12:00 |
04:17:00.73 |
+52:18:50.4 |
HIP 20028 |
7.61 |
| 2026-06-15 00:00 |
04:17:06.93 |
+52:19:02.6 |
HIP 20028 |
6.68 |
| 2026-06-15 12:00 |
04:17:13.12 |
+52:19:15.1 |
HIP 20028 |
5.76 |
| 2026-06-16 00:00 |
04:17:19.29 |
+52:19:27.8 |
HIP 20028 |
4.87 |
| 2026-06-16 12:00 |
04:17:25.44 |
+52:19:40.8 |
HIP 20028 |
4.00 |
| 2026-06-17 00:00 |
04:17:31.58 |
+52:19:53.9 |
HIP 20028 |
3.19 |
| 2026-06-17 12:00 |
04:17:37.70 |
+52:20:07.2 |
HIP 20028 |
2.50 |
| 2026-06-18 00:00 |
04:17:43.80 |
+52:20:20.8 |
HIP 20028 |
2.02 |
| 2026-06-18 12:00 |
04:17:49.88 |
+52:20:34.5 |
HIP 20028 |
1.94 |
| 2026-06-19 00:00 |
04:17:55.94 |
+52:20:48.5 |
HIP 20028 |
2.29 |
| 2026-06-19 12:00 |
04:18:01.99 |
+52:21:02.7 |
HIP 20028 |
2.92 |
| 2026-06-20 00:00 |
04:18:08.01 |
+52:21:17.0 |
HIP 20028 |
3.69 |
| 2026-06-20 12:00 |
04:18:14.01 |
+52:21:31.6 |
HIP 20028 |
4.52 |
| 2026-06-21 00:00 |
04:18:19.99 |
+52:21:46.3 |
HIP 20028 |
5.39 |
| 2026-06-21 12:00 |
04:18:25.95 |
+52:22:01.3 |
HIP 20028 |
6.28 |
| 2026-06-22 00:00 |
04:18:31.89 |
+52:22:16.5 |
HIP 20028 |
7.18 |