メタデータ
| 項目 |
値 |
| Designation |
232P/Hill |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2009-10-01T10:51:18.581760Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:28:01Z |
| Obs used |
297 |
| NEO |
- |
| M1 |
7.200 |
| K1 |
19.750 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2010-10-02.0000000 |
| e |
0.33492236 |
| q (au) |
2.982861 |
| a (au) |
4.484981 |
| i (deg) |
14.635076 |
| Ω (om, deg) |
56.129136 |
| ω (w, deg) |
53.417372 |
| M (ma, deg) |
37.932128 |
等級
散乱 + 全体線形
$$
M_a = (9.156 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
9.156 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| 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) |
| 2026-06-01 00:00 |
00:11:40.44 |
-13:15:00.3 |
HIP 1012 |
25.58 |
| 2026-06-01 12:00 |
00:11:57.69 |
-13:14:09.2 |
HIP 1012 |
24.38 |
| 2026-06-02 00:00 |
00:12:14.83 |
-13:13:19.2 |
HIP 1012 |
23.89 |
| 2026-06-02 12:00 |
00:12:31.86 |
-13:12:30.2 |
HIP 1012 |
24.14 |
| 2026-06-03 00:00 |
00:12:48.78 |
-13:11:42.3 |
HIP 1012 |
25.08 |
| 2026-06-03 12:00 |
00:13:05.57 |
-13:10:55.5 |
HIP 1012 |
26.62 |
| 2026-06-04 00:00 |
00:13:22.26 |
-13:10:09.8 |
HIP 1012 |
28.67 |
| 2026-06-04 12:00 |
00:13:38.82 |
-13:09:25.1 |
HIP 1237 |
26.47 |
| 2026-06-05 00:00 |
00:13:55.27 |
-13:08:41.6 |
HIP 1237 |
22.41 |
| 2026-06-05 12:00 |
00:14:11.60 |
-13:07:59.1 |
HIP 1237 |
18.38 |
| 2026-06-06 00:00 |
00:14:27.81 |
-13:07:17.8 |
HIP 1237 |
14.39 |
| 2026-06-06 12:00 |
00:14:43.90 |
-13:06:37.5 |
HIP 1237 |
10.45 |
| 2026-06-07 00:00 |
00:14:59.86 |
-13:05:58.4 |
HIP 1237 |
6.59 |
| 2026-06-07 12:00 |
00:15:15.71 |
-13:05:20.3 |
HIP 1237 |
2.99 |
| 2026-06-08 00:00 |
00:15:31.43 |
-13:04:43.4 |
HIP 1237 |
2.22 |
| 2026-06-08 12:00 |
00:15:47.03 |
-13:04:07.6 |
HIP 1237 |
5.54 |
| 2026-06-09 00:00 |
00:16:02.50 |
-13:03:33.0 |
HIP 1237 |
9.25 |
| 2026-06-09 12:00 |
00:16:17.85 |
-13:02:59.5 |
HIP 1362 |
11.10 |
| 2026-06-10 00:00 |
00:16:33.07 |
-13:02:27.1 |
HIP 1362 |
7.47 |
| 2026-06-10 12:00 |
00:16:48.16 |
-13:01:55.8 |
HIP 1362 |
4.08 |
| 2026-06-11 00:00 |
00:17:03.12 |
-13:01:25.8 |
HIP 1362 |
2.24 |
| 2026-06-11 12:00 |
00:17:17.95 |
-13:00:56.8 |
HIP 1362 |
4.48 |
| 2026-06-12 00:00 |
00:17:32.65 |
-13:00:29.0 |
HIP 1362 |
7.82 |
| 2026-06-12 12:00 |
00:17:47.21 |
-13:00:02.4 |
HIP 1362 |
11.28 |
| 2026-06-13 00:00 |
00:18:01.65 |
-12:59:37.0 |
HIP 1362 |
14.77 |
| 2026-06-13 12:00 |
00:18:15.95 |
-12:59:12.7 |
HIP 1362 |
18.24 |
| 2026-06-14 00:00 |
00:18:30.11 |
-12:58:49.6 |
HIP 1362 |
21.68 |
| 2026-06-14 12:00 |
00:18:44.14 |
-12:58:27.7 |
HIP 1611 |
21.68 |
| 2026-06-15 00:00 |
00:18:58.03 |
-12:58:06.9 |
HIP 1611 |
18.52 |
| 2026-06-15 12:00 |
00:19:11.78 |
-12:57:47.4 |
HIP 1611 |
15.48 |
| 2026-06-16 00:00 |
00:19:25.39 |
-12:57:29.0 |
HIP 1611 |
12.62 |
| 2026-06-16 12:00 |
00:19:38.86 |
-12:57:11.8 |
HIP 1611 |
10.08 |
| 2026-06-17 00:00 |
00:19:52.19 |
-12:56:55.8 |
HIP 1611 |
8.10 |
| 2026-06-17 12:00 |
00:20:05.38 |
-12:56:41.0 |
HIP 1611 |
7.12 |
| 2026-06-18 00:00 |
00:20:18.42 |
-12:56:27.4 |
HIP 1611 |
7.48 |
| 2026-06-18 12:00 |
00:20:31.32 |
-12:56:15.0 |
HIP 1611 |
9.00 |
| 2026-06-19 00:00 |
00:20:44.08 |
-12:56:03.8 |
HIP 1611 |
11.18 |
| 2026-06-19 12:00 |
00:20:56.69 |
-12:55:53.8 |
HIP 1611 |
13.68 |
| 2026-06-20 00:00 |
00:21:09.15 |
-12:55:45.0 |
HIP 1611 |
16.34 |
| 2026-06-20 12:00 |
00:21:21.47 |
-12:55:37.4 |
HIP 1611 |
19.07 |
| 2026-06-21 00:00 |
00:21:33.63 |
-12:55:31.0 |
HIP 1611 |
21.83 |
| 2026-06-21 12:00 |
00:21:45.65 |
-12:55:25.8 |
HIP 1611 |
24.60 |
| 2026-06-22 00:00 |
00:21:57.52 |
-12:55:21.8 |
HIP 1831 |
23.49 |