メタデータ
| 項目 |
値 |
| Designation |
C/2008 J6 (Hill) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2008-04-10T22:28:26.912640Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:20Z |
| Obs used |
385 |
| NEO |
- |
| M1 |
13.400 |
| K1 |
4.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2008-07-07.0000000 |
| e |
1.00213779 |
| q (au) |
2.003509 |
| a (au) |
-937.187180 |
| i (deg) |
44.988370 |
| Ω (om, deg) |
298.179314 |
| ω (w, deg) |
10.700067 |
| M (ma, deg) |
0.002991 |
等級
散乱 + 全体線形
$$
M_a = (10.018 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
10.018 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.997 |
| 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 |
07:13:34.63 |
+33:43:16.6 |
HIP 34812 |
29.99 |
| 2026-06-01 12:00 |
07:13:37.70 |
+33:43:04.6 |
HIP 34812 |
30.48 |
| 2026-06-02 00:00 |
07:13:40.80 |
+33:42:52.7 |
HIP 34812 |
30.98 |
| 2026-06-02 12:00 |
07:13:43.91 |
+33:42:40.8 |
HIP 34812 |
31.49 |
| 2026-06-03 00:00 |
07:13:47.04 |
+33:42:28.9 |
HIP 34812 |
32.01 |
| 2026-06-03 12:00 |
07:13:50.18 |
+33:42:17.0 |
HIP 34812 |
32.53 |
| 2026-06-04 00:00 |
07:13:53.34 |
+33:42:05.2 |
HIP 34812 |
33.06 |
| 2026-06-04 12:00 |
07:13:56.51 |
+33:41:53.4 |
HIP 34812 |
33.60 |
| 2026-06-05 00:00 |
07:13:59.71 |
+33:41:41.7 |
HIP 34812 |
34.14 |
| 2026-06-05 12:00 |
07:14:02.91 |
+33:41:30.0 |
HIP 34812 |
34.70 |
| 2026-06-06 00:00 |
07:14:06.14 |
+33:41:18.3 |
HIP 34812 |
35.25 |
| 2026-06-06 12:00 |
07:14:09.38 |
+33:41:06.7 |
HIP 34812 |
35.82 |
| 2026-06-07 00:00 |
07:14:12.63 |
+33:40:55.1 |
HIP 34812 |
36.39 |
| 2026-06-07 12:00 |
07:14:15.90 |
+33:40:43.6 |
HIP 34812 |
36.96 |
| 2026-06-08 00:00 |
07:14:19.18 |
+33:40:32.1 |
HIP 34812 |
37.55 |
| 2026-06-08 12:00 |
07:14:22.48 |
+33:40:20.6 |
HIP 34812 |
38.13 |
| 2026-06-09 00:00 |
07:14:25.79 |
+33:40:09.2 |
HIP 34812 |
38.73 |
| 2026-06-09 12:00 |
07:14:29.12 |
+33:39:57.8 |
HIP 35252 |
38.83 |
| 2026-06-10 00:00 |
07:14:32.46 |
+33:39:46.4 |
HIP 35252 |
38.37 |
| 2026-06-10 12:00 |
07:14:35.81 |
+33:39:35.1 |
HIP 35252 |
37.92 |
| 2026-06-11 00:00 |
07:14:39.18 |
+33:39:23.8 |
HIP 35252 |
37.48 |
| 2026-06-11 12:00 |
07:14:42.56 |
+33:39:12.6 |
HIP 35252 |
37.04 |
| 2026-06-12 00:00 |
07:14:45.95 |
+33:39:01.4 |
HIP 35252 |
36.60 |
| 2026-06-12 12:00 |
07:14:49.36 |
+33:38:50.3 |
HIP 35252 |
36.18 |
| 2026-06-13 00:00 |
07:14:52.78 |
+33:38:39.2 |
HIP 35252 |
35.76 |
| 2026-06-13 12:00 |
07:14:56.21 |
+33:38:28.2 |
HIP 35252 |
35.35 |
| 2026-06-14 00:00 |
07:14:59.65 |
+33:38:17.2 |
HIP 35252 |
34.94 |
| 2026-06-14 12:00 |
07:15:03.10 |
+33:38:06.2 |
HIP 35252 |
34.55 |
| 2026-06-15 00:00 |
07:15:06.57 |
+33:37:55.3 |
HIP 35252 |
34.17 |
| 2026-06-15 12:00 |
07:15:10.05 |
+33:37:44.4 |
HIP 35252 |
33.79 |
| 2026-06-16 00:00 |
07:15:13.54 |
+33:37:33.6 |
HIP 35252 |
33.43 |
| 2026-06-16 12:00 |
07:15:17.04 |
+33:37:22.9 |
HIP 35252 |
33.07 |
| 2026-06-17 00:00 |
07:15:20.55 |
+33:37:12.1 |
HIP 35252 |
32.73 |
| 2026-06-17 12:00 |
07:15:24.07 |
+33:37:01.5 |
HIP 35252 |
32.40 |
| 2026-06-18 00:00 |
07:15:27.60 |
+33:36:50.9 |
HIP 35252 |
32.08 |
| 2026-06-18 12:00 |
07:15:31.14 |
+33:36:40.3 |
HIP 35252 |
31.77 |
| 2026-06-19 00:00 |
07:15:34.69 |
+33:36:29.8 |
HIP 35252 |
31.48 |
| 2026-06-19 12:00 |
07:15:38.25 |
+33:36:19.3 |
HIP 35252 |
31.20 |
| 2026-06-20 00:00 |
07:15:41.82 |
+33:36:08.9 |
HIP 35252 |
30.94 |
| 2026-06-20 12:00 |
07:15:45.40 |
+33:35:58.5 |
HIP 35252 |
30.69 |
| 2026-06-21 00:00 |
07:15:48.98 |
+33:35:48.2 |
HIP 35252 |
30.45 |
| 2026-06-21 12:00 |
07:15:52.58 |
+33:35:38.0 |
HIP 35252 |
30.23 |
| 2026-06-22 00:00 |
07:15:56.18 |
+33:35:27.8 |
HIP 35252 |
30.03 |