メタデータ
| 項目 |
値 |
| Designation |
P/2009 O3 (Hill) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2009-05-18T14:30:19.399680Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:31Z |
| Obs used |
328 |
| NEO |
- |
| M1 |
15.200 |
| 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) |
2009-09-08.0000000 |
| e |
0.68688005 |
| q (au) |
2.449980 |
| a (au) |
7.824412 |
| i (deg) |
16.217527 |
| Ω (om, deg) |
183.763869 |
| ω (w, deg) |
154.552199 |
| M (ma, deg) |
5.061460 |
等級
散乱 + 全体線形
$$
M_a = (13.998 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
13.998 |
| n |
2.000 |
| gf |
0.973 |
| gb |
-0.965 |
| k |
1.000 |
| δ90 |
8.190 |
| 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 |
12:18:08.39 |
-00:01:13.3 |
HIP 59906 |
17.78 |
| 2026-06-01 12:00 |
12:18:05.94 |
-00:00:51.3 |
HIP 59906 |
17.08 |
| 2026-06-02 00:00 |
12:18:03.58 |
-00:00:30.0 |
HIP 59906 |
16.41 |
| 2026-06-02 12:00 |
12:18:01.31 |
-00:00:09.2 |
HIP 59906 |
15.76 |
| 2026-06-03 00:00 |
12:17:59.14 |
+00:00:11.0 |
HIP 59906 |
15.13 |
| 2026-06-03 12:00 |
12:17:57.05 |
+00:00:30.5 |
HIP 59906 |
14.53 |
| 2026-06-04 00:00 |
12:17:55.05 |
+00:00:49.5 |
HIP 59906 |
13.95 |
| 2026-06-04 12:00 |
12:17:53.15 |
+00:01:07.8 |
HIP 59906 |
13.40 |
| 2026-06-05 00:00 |
12:17:51.33 |
+00:01:25.5 |
HIP 59906 |
12.87 |
| 2026-06-05 12:00 |
12:17:49.61 |
+00:01:42.6 |
HIP 59906 |
12.37 |
| 2026-06-06 00:00 |
12:17:47.98 |
+00:01:59.0 |
HIP 59906 |
11.89 |
| 2026-06-06 12:00 |
12:17:46.44 |
+00:02:14.9 |
HIP 59906 |
11.43 |
| 2026-06-07 00:00 |
12:17:44.99 |
+00:02:30.1 |
HIP 59906 |
11.00 |
| 2026-06-07 12:00 |
12:17:43.63 |
+00:02:44.7 |
HIP 59906 |
10.59 |
| 2026-06-08 00:00 |
12:17:42.37 |
+00:02:58.7 |
HIP 59906 |
10.21 |
| 2026-06-08 12:00 |
12:17:41.19 |
+00:03:12.1 |
HIP 59906 |
9.85 |
| 2026-06-09 00:00 |
12:17:40.11 |
+00:03:24.8 |
HIP 59906 |
9.51 |
| 2026-06-09 12:00 |
12:17:39.12 |
+00:03:37.0 |
HIP 59906 |
9.20 |
| 2026-06-10 00:00 |
12:17:38.23 |
+00:03:48.5 |
HIP 59906 |
8.91 |
| 2026-06-10 12:00 |
12:17:37.42 |
+00:03:59.4 |
HIP 59906 |
8.64 |
| 2026-06-11 00:00 |
12:17:36.71 |
+00:04:09.6 |
HIP 59906 |
8.39 |
| 2026-06-11 12:00 |
12:17:36.09 |
+00:04:19.3 |
HIP 59906 |
8.17 |
| 2026-06-12 00:00 |
12:17:35.56 |
+00:04:28.3 |
HIP 59906 |
7.97 |
| 2026-06-12 12:00 |
12:17:35.13 |
+00:04:36.7 |
HIP 59906 |
7.79 |
| 2026-06-13 00:00 |
12:17:34.79 |
+00:04:44.5 |
HIP 59906 |
7.64 |
| 2026-06-13 12:00 |
12:17:34.54 |
+00:04:51.7 |
HIP 59906 |
7.51 |
| 2026-06-14 00:00 |
12:17:34.38 |
+00:04:58.2 |
HIP 59906 |
7.40 |
| 2026-06-14 12:00 |
12:17:34.32 |
+00:05:04.1 |
HIP 59906 |
7.31 |
| 2026-06-15 00:00 |
12:17:34.35 |
+00:05:09.4 |
HIP 59906 |
7.25 |
| 2026-06-15 12:00 |
12:17:34.47 |
+00:05:14.1 |
HIP 59906 |
7.21 |
| 2026-06-16 00:00 |
12:17:34.68 |
+00:05:18.1 |
HIP 59906 |
7.20 |
| 2026-06-16 12:00 |
12:17:34.99 |
+00:05:21.6 |
HIP 59906 |
7.20 |
| 2026-06-17 00:00 |
12:17:35.39 |
+00:05:24.4 |
HIP 59906 |
7.24 |
| 2026-06-17 12:00 |
12:17:35.88 |
+00:05:26.6 |
HIP 59906 |
7.30 |
| 2026-06-18 00:00 |
12:17:36.47 |
+00:05:28.2 |
HIP 59906 |
7.38 |
| 2026-06-18 12:00 |
12:17:37.14 |
+00:05:29.2 |
HIP 59906 |
7.49 |
| 2026-06-19 00:00 |
12:17:37.91 |
+00:05:29.6 |
HIP 59906 |
7.63 |
| 2026-06-19 12:00 |
12:17:38.77 |
+00:05:29.3 |
HIP 59906 |
7.79 |
| 2026-06-20 00:00 |
12:17:39.73 |
+00:05:28.5 |
HIP 59906 |
7.98 |
| 2026-06-20 12:00 |
12:17:40.77 |
+00:05:27.0 |
HIP 59906 |
8.19 |
| 2026-06-21 00:00 |
12:17:41.91 |
+00:05:25.0 |
HIP 59906 |
8.44 |
| 2026-06-21 12:00 |
12:17:43.13 |
+00:05:22.3 |
HIP 59906 |
8.71 |
| 2026-06-22 00:00 |
12:17:44.45 |
+00:05:19.1 |
HIP 59906 |
9.00 |