310P/Hill
メタデータ
| 項目 |
値 |
| Designation |
310P/Hill |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2015-04-19T01:39:38.698560Z |
| Orbit solution date (soln_date, UTC) |
2025-02-28T13:42:32Z |
| Obs used |
587 |
| NEO |
- |
| M1 |
13.500 |
| K1 |
11.500 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2017-01-08.0000000 |
| e |
0.42601974 |
| q (au) |
2.388747 |
| a (au) |
4.161724 |
| i (deg) |
13.186071 |
| Ω (om, deg) |
8.960664 |
| ω (w, deg) |
31.658059 |
| M (ma, deg) |
73.128566 |
等級
散乱 + 全体線形
$$
M_a = (14.263 + 3.893\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
14.263 |
| n |
3.893 |
| gf |
0.885 |
| gb |
-0.839 |
| k |
0.996 |
| δ90 |
1.000 |
| 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 |
12:32:18.11 |
-00:27:35.4 |
HIP 61240 |
15.13 |
| 2026-02-03 12:00 |
12:32:11.03 |
-00:27:10.5 |
HIP 61240 |
16.10 |
| 2026-02-04 00:00 |
12:32:03.75 |
-00:26:44.6 |
HIP 61240 |
17.23 |
| 2026-02-04 12:00 |
12:31:56.27 |
-00:26:17.5 |
HIP 61240 |
18.52 |
| 2026-02-05 00:00 |
12:31:48.60 |
-00:25:49.4 |
HIP 61240 |
19.94 |
| 2026-02-05 12:00 |
12:31:40.74 |
-00:25:20.2 |
HIP 61240 |
21.49 |
| 2026-02-06 00:00 |
12:31:32.69 |
-00:24:49.9 |
HIP 61240 |
23.15 |
| 2026-02-06 12:00 |
12:31:24.44 |
-00:24:18.6 |
HIP 61240 |
24.91 |
| 2026-02-07 00:00 |
12:31:16.00 |
-00:23:46.2 |
HIP 61240 |
26.76 |
| 2026-02-07 12:00 |
12:31:07.37 |
-00:23:12.7 |
HIP 60953 |
25.66 |
| 2026-02-08 00:00 |
12:30:58.55 |
-00:22:38.2 |
HIP 60953 |
23.49 |
| 2026-02-08 12:00 |
12:30:49.54 |
-00:22:02.6 |
HIP 60953 |
21.29 |
| 2026-02-09 00:00 |
12:30:40.34 |
-00:21:26.0 |
HIP 60953 |
19.08 |
| 2026-02-09 12:00 |
12:30:30.95 |
-00:20:48.3 |
HIP 60953 |
16.87 |
| 2026-02-10 00:00 |
12:30:21.38 |
-00:20:09.7 |
HIP 60953 |
14.68 |
| 2026-02-10 12:00 |
12:30:11.63 |
-00:19:30.0 |
HIP 60953 |
12.56 |
| 2026-02-11 00:00 |
12:30:01.68 |
-00:18:49.3 |
HIP 60953 |
10.58 |
| 2026-02-11 12:00 |
12:29:51.56 |
-00:18:07.6 |
HIP 60953 |
8.87 |
| 2026-02-12 00:00 |
12:29:41.25 |
-00:17:24.9 |
HIP 60953 |
7.69 |
| 2026-02-12 12:00 |
12:29:30.77 |
-00:16:41.2 |
HIP 60953 |
7.33 |
| 2026-02-13 00:00 |
12:29:20.10 |
-00:15:56.5 |
HIP 60953 |
7.96 |
| 2026-02-13 12:00 |
12:29:09.25 |
-00:15:10.9 |
HIP 60953 |
9.43 |
| 2026-02-14 00:00 |
12:28:58.23 |
-00:14:24.3 |
HIP 60953 |
11.45 |
| 2026-02-14 12:00 |
12:28:47.03 |
-00:13:36.8 |
HIP 60953 |
13.81 |
| 2026-02-15 00:00 |
12:28:35.66 |
-00:12:48.3 |
HIP 60953 |
16.39 |
| 2026-02-15 12:00 |
12:28:24.12 |
-00:11:58.9 |
HIP 60953 |
19.11 |
| 2026-02-16 00:00 |
12:28:12.40 |
-00:11:08.6 |
HIP 60726 |
21.63 |
| 2026-02-16 12:00 |
12:28:00.52 |
-00:10:17.4 |
HIP 60726 |
18.67 |
| 2026-02-17 00:00 |
12:27:48.46 |
-00:09:25.2 |
HIP 60726 |
15.73 |
| 2026-02-17 12:00 |
12:27:36.24 |
-00:08:32.2 |
HIP 60726 |
12.83 |
| 2026-02-18 00:00 |
12:27:23.86 |
-00:07:38.3 |
HIP 60726 |
10.07 |
| 2026-02-18 12:00 |
12:27:11.31 |
-00:06:43.6 |
HIP 60726 |
7.66 |
| 2026-02-19 00:00 |
12:26:58.60 |
-00:05:48.0 |
HIP 60726 |
6.09 |
| 2026-02-19 12:00 |
12:26:45.74 |
-00:04:51.6 |
HIP 60726 |
6.14 |
| 2026-02-20 00:00 |
12:26:32.71 |
-00:03:54.3 |
HIP 60726 |
7.82 |
| 2026-02-20 12:00 |
12:26:19.53 |
-00:02:56.3 |
HIP 60726 |
10.41 |
| 2026-02-21 00:00 |
12:26:06.20 |
-00:01:57.4 |
HIP 60726 |
13.42 |
| 2026-02-21 12:00 |
12:25:52.72 |
-00:00:57.8 |
HIP 60641 |
16.25 |
| 2026-02-22 00:00 |
12:25:39.08 |
+00:00:02.6 |
HIP 60641 |
16.98 |
| 2026-02-22 12:00 |
12:25:25.30 |
+00:01:03.7 |
HIP 60641 |
18.40 |
| 2026-02-23 00:00 |
12:25:11.38 |
+00:02:05.6 |
HIP 60641 |
20.39 |
| 2026-02-23 12:00 |
12:24:57.31 |
+00:03:08.3 |
HIP 60641 |
22.81 |
| 2026-02-24 00:00 |
12:24:43.10 |
+00:04:11.6 |
HIP 60641 |
25.56 |