メタデータ
| 項目 |
値 |
| Designation |
C/2006 S5 (Hill) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2007-12-09T18:01:38.340480Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:00Z |
| Obs used |
1177 |
| NEO |
- |
| M1 |
12.500 |
| 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) |
2007-11-10.0000000 |
| e |
0.97300141 |
| q (au) |
2.630434 |
| a (au) |
97.428581 |
| i (deg) |
10.131379 |
| Ω (om, deg) |
281.563425 |
| ω (w, deg) |
182.109258 |
| M (ma, deg) |
359.969509 |
等級
散乱 + 全体線形
$$
M_a = (13.005 + 2.274\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
13.005 |
| n |
2.274 |
| gf |
1.000 |
| gb |
-0.585 |
| k |
0.800 |
| 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 |
16:47:19.46 |
-26:52:57.3 |
HIP 82157 |
11.27 |
| 2026-09-20 12:00 |
16:47:20.64 |
-26:52:55.0 |
HIP 82157 |
11.32 |
| 2026-09-21 00:00 |
16:47:21.85 |
-26:52:52.8 |
HIP 82157 |
11.38 |
| 2026-09-21 12:00 |
16:47:23.09 |
-26:52:50.7 |
HIP 82157 |
11.45 |
| 2026-09-22 00:00 |
16:47:24.36 |
-26:52:48.6 |
HIP 82157 |
11.53 |
| 2026-09-22 12:00 |
16:47:25.66 |
-26:52:46.6 |
HIP 82157 |
11.62 |
| 2026-09-23 00:00 |
16:47:26.99 |
-26:52:44.6 |
HIP 82157 |
11.72 |
| 2026-09-23 12:00 |
16:47:28.35 |
-26:52:42.7 |
HIP 82157 |
11.83 |
| 2026-09-24 00:00 |
16:47:29.74 |
-26:52:40.8 |
HIP 82157 |
11.96 |
| 2026-09-24 12:00 |
16:47:31.15 |
-26:52:39.0 |
HIP 82157 |
12.09 |
| 2026-09-25 00:00 |
16:47:32.60 |
-26:52:37.3 |
HIP 82157 |
12.24 |
| 2026-09-25 12:00 |
16:47:34.07 |
-26:52:35.6 |
HIP 82157 |
12.39 |
| 2026-09-26 00:00 |
16:47:35.58 |
-26:52:34.0 |
HIP 82157 |
12.56 |
| 2026-09-26 12:00 |
16:47:37.11 |
-26:52:32.4 |
HIP 82157 |
12.74 |
| 2026-09-27 00:00 |
16:47:38.67 |
-26:52:30.9 |
HIP 82157 |
12.93 |
| 2026-09-27 12:00 |
16:47:40.26 |
-26:52:29.5 |
HIP 82157 |
13.13 |
| 2026-09-28 00:00 |
16:47:41.87 |
-26:52:28.1 |
HIP 82157 |
13.34 |
| 2026-09-28 12:00 |
16:47:43.52 |
-26:52:26.8 |
HIP 82157 |
13.56 |
| 2026-09-29 00:00 |
16:47:45.19 |
-26:52:25.5 |
HIP 82157 |
13.80 |
| 2026-09-29 12:00 |
16:47:46.89 |
-26:52:24.3 |
HIP 82157 |
14.04 |
| 2026-09-30 00:00 |
16:47:48.62 |
-26:52:23.2 |
HIP 82157 |
14.30 |
| 2026-09-30 12:00 |
16:47:50.38 |
-26:52:22.1 |
HIP 82157 |
14.57 |
| 2026-10-01 00:00 |
16:47:52.16 |
-26:52:21.1 |
HIP 82157 |
14.85 |
| 2026-10-01 12:00 |
16:47:53.97 |
-26:52:20.2 |
HIP 82157 |
15.14 |
| 2026-10-02 00:00 |
16:47:55.81 |
-26:52:19.3 |
HIP 82157 |
15.44 |
| 2026-10-02 12:00 |
16:47:57.68 |
-26:52:18.4 |
HIP 82157 |
15.75 |
| 2026-10-03 00:00 |
16:47:59.57 |
-26:52:17.6 |
HIP 82157 |
16.07 |
| 2026-10-03 12:00 |
16:48:01.50 |
-26:52:16.9 |
HIP 82157 |
16.40 |
| 2026-10-04 00:00 |
16:48:03.44 |
-26:52:16.3 |
HIP 82157 |
16.74 |
| 2026-10-04 12:00 |
16:48:05.42 |
-26:52:15.7 |
HIP 82157 |
17.09 |
| 2026-10-05 00:00 |
16:48:07.42 |
-26:52:15.1 |
HIP 82157 |
17.45 |
| 2026-10-05 12:00 |
16:48:09.45 |
-26:52:14.6 |
HIP 82157 |
17.82 |
| 2026-10-06 00:00 |
16:48:11.51 |
-26:52:14.2 |
HIP 82157 |
18.19 |
| 2026-10-06 12:00 |
16:48:13.59 |
-26:52:13.9 |
HIP 82157 |
18.58 |
| 2026-10-07 00:00 |
16:48:15.70 |
-26:52:13.6 |
HIP 82157 |
18.98 |
| 2026-10-07 12:00 |
16:48:17.84 |
-26:52:13.3 |
HIP 82157 |
19.38 |
| 2026-10-08 00:00 |
16:48:20.00 |
-26:52:13.1 |
HIP 82157 |
19.80 |
| 2026-10-08 12:00 |
16:48:22.19 |
-26:52:13.0 |
HIP 82157 |
20.22 |
| 2026-10-09 00:00 |
16:48:24.40 |
-26:52:13.0 |
HIP 82157 |
20.65 |
| 2026-10-09 12:00 |
16:48:26.64 |
-26:52:13.0 |
HIP 82157 |
21.09 |
| 2026-10-10 00:00 |
16:48:28.90 |
-26:52:13.0 |
HIP 82157 |
21.54 |
| 2026-10-10 12:00 |
16:48:31.19 |
-26:52:13.1 |
HIP 82157 |
22.00 |
| 2026-10-11 00:00 |
16:48:33.51 |
-26:52:13.3 |
HIP 82157 |
22.46 |