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 |
-0.998 |
| 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) |
| 2026-03-26 00:00 |
23:21:09.16 |
-17:17:30.4 |
HIP 115287 |
17.89 |
| 2026-03-26 12:00 |
23:21:35.11 |
-17:14:59.6 |
HIP 115287 |
22.13 |
| 2026-03-27 00:00 |
23:22:01.04 |
-17:12:29.2 |
HIP 115325 |
21.16 |
| 2026-03-27 12:00 |
23:22:26.94 |
-17:09:59.2 |
HIP 115325 |
21.92 |
| 2026-03-28 00:00 |
23:22:52.82 |
-17:07:29.7 |
HIP 115325 |
24.54 |
| 2026-03-28 12:00 |
23:23:18.67 |
-17:05:00.7 |
HIP 115553 |
21.11 |
| 2026-03-29 00:00 |
23:23:44.49 |
-17:02:32.1 |
HIP 115553 |
19.14 |
| 2026-03-29 12:00 |
23:24:10.28 |
-17:00:03.9 |
HIP 115553 |
19.37 |
| 2026-03-30 00:00 |
23:24:36.05 |
-16:57:36.2 |
HIP 115553 |
21.72 |
| 2026-03-30 12:00 |
23:25:01.79 |
-16:55:09.0 |
HIP 115553 |
25.61 |
| 2026-03-31 00:00 |
23:25:27.50 |
-16:52:42.2 |
HIP 115553 |
30.45 |
| 2026-03-31 12:00 |
23:25:53.18 |
-16:50:15.9 |
HIP 115707 |
35.01 |
| 2026-04-01 00:00 |
23:26:18.83 |
-16:47:50.0 |
HIP 115707 |
31.35 |
| 2026-04-01 12:00 |
23:26:44.46 |
-16:45:24.6 |
HIP 115707 |
28.76 |
| 2026-04-02 00:00 |
23:27:10.05 |
-16:42:59.7 |
HIP 115707 |
27.56 |
| 2026-04-02 12:00 |
23:27:35.61 |
-16:40:35.3 |
HIP 115707 |
27.91 |
| 2026-04-03 00:00 |
23:28:01.14 |
-16:38:11.4 |
HIP 115960 |
23.95 |
| 2026-04-03 12:00 |
23:28:26.64 |
-16:35:48.0 |
HIP 115960 |
19.15 |
| 2026-04-04 00:00 |
23:28:52.10 |
-16:33:25.0 |
HIP 115960 |
15.67 |
| 2026-04-04 12:00 |
23:29:17.53 |
-16:31:02.6 |
HIP 115960 |
14.50 |
| 2026-04-05 00:00 |
23:29:42.93 |
-16:28:40.6 |
HIP 115960 |
16.13 |
| 2026-04-05 12:00 |
23:30:08.30 |
-16:26:19.2 |
HIP 115960 |
19.87 |
| 2026-04-06 00:00 |
23:30:33.63 |
-16:23:58.3 |
HIP 115960 |
24.77 |
| 2026-04-06 12:00 |
23:30:58.92 |
-16:21:37.9 |
HIP 116051 |
22.72 |
| 2026-04-07 00:00 |
23:31:24.18 |
-16:19:18.0 |
HIP 116051 |
21.59 |
| 2026-04-07 12:00 |
23:31:49.40 |
-16:16:58.6 |
HIP 116051 |
22.38 |
| 2026-04-08 00:00 |
23:32:14.59 |
-16:14:39.8 |
HIP 116302 |
23.81 |
| 2026-04-08 12:00 |
23:32:39.74 |
-16:12:21.5 |
HIP 116302 |
18.56 |
| 2026-04-09 00:00 |
23:33:04.85 |
-16:10:03.8 |
HIP 116302 |
14.35 |
| 2026-04-09 12:00 |
23:33:29.92 |
-16:07:46.6 |
HIP 116302 |
12.25 |
| 2026-04-10 00:00 |
23:33:54.96 |
-16:05:29.9 |
HIP 116302 |
13.30 |
| 2026-04-10 12:00 |
23:34:19.95 |
-16:03:13.8 |
HIP 116302 |
16.91 |
| 2026-04-11 00:00 |
23:34:44.91 |
-16:00:58.3 |
HIP 116302 |
21.84 |
| 2026-04-11 12:00 |
23:35:09.82 |
-15:58:43.3 |
HIP 116468 |
21.86 |
| 2026-04-12 00:00 |
23:35:34.69 |
-15:56:29.0 |
HIP 116468 |
21.58 |
| 2026-04-12 12:00 |
23:35:59.52 |
-15:54:15.2 |
HIP 116468 |
23.11 |
| 2026-04-13 00:00 |
23:36:24.31 |
-15:52:01.9 |
HIP 116468 |
26.14 |
| 2026-04-13 12:00 |
23:36:49.05 |
-15:49:49.3 |
HIP 116468 |
30.20 |
| 2026-04-14 00:00 |
23:37:13.75 |
-15:47:37.3 |
HIP 116468 |
34.94 |
| 2026-04-14 12:00 |
23:37:38.41 |
-15:45:25.8 |
HIP 116590 |
32.55 |
| 2026-04-15 00:00 |
23:38:03.02 |
-15:43:15.0 |
HIP 116590 |
30.96 |
| 2026-04-15 12:00 |
23:38:27.58 |
-15:41:04.8 |
HIP 116792 |
30.09 |
| 2026-04-16 00:00 |
23:38:52.10 |
-15:38:55.2 |
HIP 116792 |
23.97 |