メタデータ
| 項目 |
値 |
| Designation |
211P/Hill |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2016-01-27T02:47:26.427840Z |
| Orbit solution date (soln_date, UTC) |
2024-05-14T12:42:30Z |
| Obs used |
854 |
| NEO |
- |
| M1 |
7.800 |
| K1 |
24.250 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2014-03-20.0000000 |
| e |
0.33923044 |
| q (au) |
2.351929 |
| a (au) |
3.559379 |
| i (deg) |
18.888227 |
| Ω (om, deg) |
117.272120 |
| ω (w, deg) |
4.337626 |
| M (ma, deg) |
260.471637 |
等級
散乱 + 全体線形
$$
M_a = (11.022 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
11.022 |
| n |
6.000 |
| gf |
0.999 |
| gb |
-0.818 |
| k |
0.999 |
| 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) |
| 2026-09-20 00:00 |
20:53:23.05 |
-26:02:19.7 |
HIP 103148 |
18.38 |
| 2026-09-20 12:00 |
20:53:13.46 |
-26:03:04.6 |
HIP 103148 |
18.69 |
| 2026-09-21 00:00 |
20:53:04.08 |
-26:03:48.2 |
HIP 103148 |
19.25 |
| 2026-09-21 12:00 |
20:52:54.93 |
-26:04:30.5 |
HIP 103148 |
20.03 |
| 2026-09-22 00:00 |
20:52:46.01 |
-26:05:11.5 |
HIP 103148 |
20.98 |
| 2026-09-22 12:00 |
20:52:37.30 |
-26:05:51.3 |
HIP 103148 |
22.07 |
| 2026-09-23 00:00 |
20:52:28.83 |
-26:06:29.8 |
HIP 103148 |
23.26 |
| 2026-09-23 12:00 |
20:52:20.57 |
-26:07:06.9 |
HIP 103148 |
24.52 |
| 2026-09-24 00:00 |
20:52:12.55 |
-26:07:42.9 |
HIP 103148 |
25.83 |
| 2026-09-24 12:00 |
20:52:04.75 |
-26:08:17.6 |
HIP 103148 |
27.17 |
| 2026-09-25 00:00 |
20:51:57.18 |
-26:08:51.0 |
HIP 103148 |
28.53 |
| 2026-09-25 12:00 |
20:51:49.85 |
-26:09:23.1 |
HIP 103148 |
29.89 |
| 2026-09-26 00:00 |
20:51:42.74 |
-26:09:54.1 |
HIP 103148 |
31.24 |
| 2026-09-26 12:00 |
20:51:35.86 |
-26:10:23.7 |
HIP 103148 |
32.58 |
| 2026-09-27 00:00 |
20:51:29.21 |
-26:10:52.2 |
HIP 102812 |
32.93 |
| 2026-09-27 12:00 |
20:51:22.79 |
-26:11:19.4 |
HIP 102812 |
32.22 |
| 2026-09-28 00:00 |
20:51:16.61 |
-26:11:45.4 |
HIP 102812 |
31.58 |
| 2026-09-28 12:00 |
20:51:10.66 |
-26:12:10.1 |
HIP 102812 |
31.01 |
| 2026-09-29 00:00 |
20:51:04.94 |
-26:12:33.7 |
HIP 102812 |
30.52 |
| 2026-09-29 12:00 |
20:50:59.46 |
-26:12:56.0 |
HIP 102812 |
30.09 |
| 2026-09-30 00:00 |
20:50:54.21 |
-26:13:17.2 |
HIP 102812 |
29.72 |
| 2026-09-30 12:00 |
20:50:49.19 |
-26:13:37.1 |
HIP 102812 |
29.41 |
| 2026-10-01 00:00 |
20:50:44.41 |
-26:13:55.9 |
HIP 102812 |
29.15 |
| 2026-10-01 12:00 |
20:50:39.87 |
-26:14:13.4 |
HIP 102812 |
28.94 |
| 2026-10-02 00:00 |
20:50:35.56 |
-26:14:29.8 |
HIP 102812 |
28.76 |
| 2026-10-02 12:00 |
20:50:31.49 |
-26:14:45.0 |
HIP 102812 |
28.63 |
| 2026-10-03 00:00 |
20:50:27.66 |
-26:14:59.0 |
HIP 102812 |
28.53 |
| 2026-10-03 12:00 |
20:50:24.06 |
-26:15:11.8 |
HIP 102812 |
28.45 |
| 2026-10-04 00:00 |
20:50:20.70 |
-26:15:23.5 |
HIP 102812 |
28.40 |
| 2026-10-04 12:00 |
20:50:17.58 |
-26:15:34.0 |
HIP 102812 |
28.36 |
| 2026-10-05 00:00 |
20:50:14.70 |
-26:15:43.4 |
HIP 102812 |
28.34 |
| 2026-10-05 12:00 |
20:50:12.06 |
-26:15:51.6 |
HIP 102812 |
28.32 |
| 2026-10-06 00:00 |
20:50:09.66 |
-26:15:58.7 |
HIP 102812 |
28.32 |
| 2026-10-06 12:00 |
20:50:07.49 |
-26:16:04.6 |
HIP 102812 |
28.31 |
| 2026-10-07 00:00 |
20:50:05.57 |
-26:16:09.4 |
HIP 102812 |
28.31 |
| 2026-10-07 12:00 |
20:50:03.88 |
-26:16:13.1 |
HIP 102812 |
28.30 |
| 2026-10-08 00:00 |
20:50:02.44 |
-26:16:15.6 |
HIP 102812 |
28.29 |
| 2026-10-08 12:00 |
20:50:01.23 |
-26:16:17.0 |
HIP 102812 |
28.27 |
| 2026-10-09 00:00 |
20:50:00.27 |
-26:16:17.3 |
HIP 102812 |
28.24 |
| 2026-10-09 12:00 |
20:49:59.54 |
-26:16:16.5 |
HIP 102812 |
28.21 |
| 2026-10-10 00:00 |
20:49:59.06 |
-26:16:14.6 |
HIP 102812 |
28.16 |
| 2026-10-10 12:00 |
20:49:58.81 |
-26:16:11.6 |
HIP 102812 |
28.10 |
| 2026-10-11 00:00 |
20:49:58.81 |
-26:16:07.5 |
HIP 102812 |
28.04 |