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) |
| 2026-05-12 00:00 |
11:46:57.46 |
+02:30:34.0 |
HIP 57370 |
26.51 |
| 2026-05-12 12:00 |
11:46:51.42 |
+02:30:33.8 |
HIP 57370 |
25.46 |
| 2026-05-13 00:00 |
11:46:45.56 |
+02:30:32.6 |
HIP 57370 |
24.51 |
| 2026-05-13 12:00 |
11:46:39.88 |
+02:30:30.2 |
HIP 57370 |
23.65 |
| 2026-05-14 00:00 |
11:46:34.39 |
+02:30:26.8 |
HIP 57370 |
22.89 |
| 2026-05-14 12:00 |
11:46:29.07 |
+02:30:22.3 |
HIP 57370 |
22.23 |
| 2026-05-15 00:00 |
11:46:23.94 |
+02:30:16.7 |
HIP 57370 |
21.67 |
| 2026-05-15 12:00 |
11:46:18.99 |
+02:30:10.0 |
HIP 57370 |
21.21 |
| 2026-05-16 00:00 |
11:46:14.23 |
+02:30:02.3 |
HIP 57305 |
20.23 |
| 2026-05-16 12:00 |
11:46:09.65 |
+02:29:53.4 |
HIP 57305 |
19.14 |
| 2026-05-17 00:00 |
11:46:05.25 |
+02:29:43.5 |
HIP 57305 |
18.09 |
| 2026-05-17 12:00 |
11:46:01.03 |
+02:29:32.4 |
HIP 57305 |
17.07 |
| 2026-05-18 00:00 |
11:45:57.00 |
+02:29:20.3 |
HIP 57305 |
16.10 |
| 2026-05-18 12:00 |
11:45:53.15 |
+02:29:07.1 |
HIP 57305 |
15.16 |
| 2026-05-19 00:00 |
11:45:49.48 |
+02:28:52.8 |
HIP 57305 |
14.26 |
| 2026-05-19 12:00 |
11:45:46.00 |
+02:28:37.4 |
HIP 57305 |
13.39 |
| 2026-05-20 00:00 |
11:45:42.70 |
+02:28:21.0 |
HIP 57305 |
12.55 |
| 2026-05-20 12:00 |
11:45:39.58 |
+02:28:03.5 |
HIP 57305 |
11.75 |
| 2026-05-21 00:00 |
11:45:36.65 |
+02:27:44.8 |
HIP 57305 |
10.97 |
| 2026-05-21 12:00 |
11:45:33.90 |
+02:27:25.2 |
HIP 57305 |
10.23 |
| 2026-05-22 00:00 |
11:45:31.32 |
+02:27:04.4 |
HIP 57305 |
9.51 |
| 2026-05-22 12:00 |
11:45:28.94 |
+02:26:42.6 |
HIP 57305 |
8.81 |
| 2026-05-23 00:00 |
11:45:26.73 |
+02:26:19.7 |
HIP 57305 |
8.14 |
| 2026-05-23 12:00 |
11:45:24.70 |
+02:25:55.7 |
HIP 57305 |
7.50 |
| 2026-05-24 00:00 |
11:45:22.85 |
+02:25:30.7 |
HIP 57305 |
6.88 |
| 2026-05-24 12:00 |
11:45:21.19 |
+02:25:04.7 |
HIP 57305 |
6.28 |
| 2026-05-25 00:00 |
11:45:19.70 |
+02:24:37.6 |
HIP 57305 |
5.71 |
| 2026-05-25 12:00 |
11:45:18.39 |
+02:24:09.4 |
HIP 57305 |
5.17 |
| 2026-05-26 00:00 |
11:45:17.26 |
+02:23:40.2 |
HIP 57305 |
4.67 |
| 2026-05-26 12:00 |
11:45:16.31 |
+02:23:09.9 |
HIP 57305 |
4.22 |
| 2026-05-27 00:00 |
11:45:15.53 |
+02:22:38.6 |
HIP 57305 |
3.82 |
| 2026-05-27 12:00 |
11:45:14.94 |
+02:22:06.3 |
HIP 57305 |
3.51 |
| 2026-05-28 00:00 |
11:45:14.52 |
+02:21:33.0 |
HIP 57305 |
3.31 |
| 2026-05-28 12:00 |
11:45:14.27 |
+02:20:58.6 |
HIP 57305 |
3.24 |
| 2026-05-29 00:00 |
11:45:14.21 |
+02:20:23.2 |
HIP 57305 |
3.32 |
| 2026-05-29 12:00 |
11:45:14.31 |
+02:19:46.8 |
HIP 57305 |
3.54 |
| 2026-05-30 00:00 |
11:45:14.59 |
+02:19:09.3 |
HIP 57305 |
3.90 |
| 2026-05-30 12:00 |
11:45:15.05 |
+02:18:30.9 |
HIP 57305 |
4.36 |
| 2026-05-31 00:00 |
11:45:15.68 |
+02:17:51.4 |
HIP 57305 |
4.91 |
| 2026-05-31 12:00 |
11:45:16.48 |
+02:17:10.9 |
HIP 57305 |
5.53 |
| 2026-06-01 00:00 |
11:45:17.45 |
+02:16:29.5 |
HIP 57305 |
6.21 |
| 2026-06-01 12:00 |
11:45:18.60 |
+02:15:47.0 |
HIP 57305 |
6.93 |
| 2026-06-02 00:00 |
11:45:19.92 |
+02:15:03.6 |
HIP 57305 |
7.71 |