232P/Hill
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) |
| 2026-02-03 00:00 |
22:36:40.61 |
-21:58:28.8 |
HIP 111697 |
16.69 |
| 2026-02-03 12:00 |
22:37:05.93 |
-21:55:36.4 |
HIP 111697 |
10.44 |
| 2026-02-04 00:00 |
22:37:31.29 |
-21:52:44.0 |
HIP 111697 |
5.01 |
| 2026-02-04 12:00 |
22:37:56.68 |
-21:49:51.6 |
HIP 111697 |
5.20 |
| 2026-02-05 00:00 |
22:38:22.11 |
-21:46:59.3 |
HIP 111697 |
10.73 |
| 2026-02-05 12:00 |
22:38:47.58 |
-21:44:06.9 |
HIP 111697 |
17.02 |
| 2026-02-06 00:00 |
22:39:13.08 |
-21:41:14.6 |
HIP 111697 |
23.48 |
| 2026-02-06 12:00 |
22:39:38.62 |
-21:38:22.3 |
HIP 111697 |
30.01 |
| 2026-02-07 00:00 |
22:40:04.20 |
-21:35:30.1 |
HIP 112069 |
28.03 |
| 2026-02-07 12:00 |
22:40:29.80 |
-21:32:37.9 |
HIP 112069 |
23.71 |
| 2026-02-08 00:00 |
22:40:55.45 |
-21:29:45.7 |
HIP 112069 |
20.63 |
| 2026-02-08 12:00 |
22:41:21.12 |
-21:26:53.5 |
HIP 112069 |
19.39 |
| 2026-02-09 00:00 |
22:41:46.82 |
-21:24:01.4 |
HIP 112069 |
20.35 |
| 2026-02-09 12:00 |
22:42:12.56 |
-21:21:09.4 |
HIP 112162 |
21.57 |
| 2026-02-10 00:00 |
22:42:38.33 |
-21:18:17.4 |
HIP 112119 |
21.56 |
| 2026-02-10 12:00 |
22:43:04.12 |
-21:15:25.5 |
HIP 112119 |
19.68 |
| 2026-02-11 00:00 |
22:43:29.95 |
-21:12:33.6 |
HIP 112119 |
19.96 |
| 2026-02-11 12:00 |
22:43:55.81 |
-21:09:41.8 |
HIP 112119 |
22.34 |
| 2026-02-12 00:00 |
22:44:21.69 |
-21:06:50.0 |
HIP 112357 |
22.66 |
| 2026-02-12 12:00 |
22:44:47.60 |
-21:03:58.4 |
HIP 112357 |
21.57 |
| 2026-02-13 00:00 |
22:45:13.54 |
-21:01:06.8 |
HIP 112357 |
22.51 |
| 2026-02-13 12:00 |
22:45:39.50 |
-20:58:15.2 |
HIP 112462 |
19.75 |
| 2026-02-14 00:00 |
22:46:05.49 |
-20:55:23.8 |
HIP 112462 |
13.14 |
| 2026-02-14 12:00 |
22:46:31.50 |
-20:52:32.5 |
HIP 112462 |
6.73 |
| 2026-02-15 00:00 |
22:46:57.54 |
-20:49:41.2 |
HIP 112462 |
2.82 |
| 2026-02-15 12:00 |
22:47:23.60 |
-20:46:50.1 |
HIP 112462 |
7.82 |
| 2026-02-16 00:00 |
22:47:49.68 |
-20:43:59.0 |
HIP 112462 |
14.32 |
| 2026-02-16 12:00 |
22:48:15.79 |
-20:41:08.1 |
HIP 112650 |
15.01 |
| 2026-02-17 00:00 |
22:48:41.91 |
-20:38:17.3 |
HIP 112650 |
9.66 |
| 2026-02-17 12:00 |
22:49:08.06 |
-20:35:26.5 |
HIP 112650 |
7.23 |
| 2026-02-18 00:00 |
22:49:34.22 |
-20:32:36.0 |
HIP 112650 |
10.13 |
| 2026-02-18 12:00 |
22:50:00.41 |
-20:29:45.5 |
HIP 112741 |
12.70 |
| 2026-02-19 00:00 |
22:50:26.61 |
-20:26:55.2 |
HIP 112741 |
12.16 |
| 2026-02-19 12:00 |
22:50:52.83 |
-20:24:05.0 |
HIP 112741 |
15.04 |
| 2026-02-20 00:00 |
22:51:19.06 |
-20:21:14.9 |
HIP 112741 |
19.91 |
| 2026-02-20 12:00 |
22:51:45.32 |
-20:18:25.0 |
HIP 112962 |
18.73 |
| 2026-02-21 00:00 |
22:52:11.58 |
-20:15:35.2 |
HIP 112962 |
12.88 |
| 2026-02-21 12:00 |
22:52:37.86 |
-20:12:45.6 |
HIP 112962 |
8.53 |
| 2026-02-22 00:00 |
22:53:04.16 |
-20:09:56.1 |
HIP 112962 |
8.48 |
| 2026-02-22 12:00 |
22:53:30.47 |
-20:07:06.8 |
HIP 112962 |
12.79 |
| 2026-02-23 00:00 |
22:53:56.79 |
-20:04:17.7 |
HIP 112962 |
18.64 |
| 2026-02-23 12:00 |
22:54:23.12 |
-20:01:28.7 |
HIP 113204 |
17.27 |
| 2026-02-24 00:00 |
22:54:49.46 |
-19:58:39.9 |
HIP 113204 |
13.68 |