P/2005 S2 (Skiff)
メタデータ
| 項目 |
値 |
| Designation |
P/2005 S2 (Skiff) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2006-06-30T17:48:40.472640Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:52Z |
| Obs used |
90 |
| NEO |
- |
| M1 |
7.900 |
| K1 |
10.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2005-09-03.0000000 |
| e |
0.19670978 |
| q (au) |
6.398037 |
| a (au) |
7.964789 |
| i (deg) |
3.141049 |
| Ω (om, deg) |
161.272405 |
| ω (w, deg) |
229.933181 |
| M (ma, deg) |
346.813274 |
等級
散乱 + 全体線形
$$
M_a = (2.987 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
2.987 |
| n |
6.000 |
| gf |
0.966 |
| gb |
-0.504 |
| k |
1.000 |
| δ90 |
9.678 |
| 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 |
21:39:26.21 |
-13:08:58.5 |
HIP 106831 |
28.76 |
| 2026-02-03 12:00 |
21:39:46.00 |
-13:07:24.3 |
HIP 106951 |
30.11 |
| 2026-02-04 00:00 |
21:40:05.79 |
-13:05:49.9 |
HIP 106951 |
29.22 |
| 2026-02-04 12:00 |
21:40:25.60 |
-13:04:15.3 |
HIP 106951 |
29.20 |
| 2026-02-05 00:00 |
21:40:45.41 |
-13:02:40.5 |
HIP 106951 |
30.04 |
| 2026-02-05 12:00 |
21:41:05.24 |
-13:01:05.5 |
HIP 106951 |
31.69 |
| 2026-02-06 00:00 |
21:41:25.07 |
-12:59:30.4 |
HIP 106951 |
34.03 |
| 2026-02-06 12:00 |
21:41:44.91 |
-12:57:55.0 |
HIP 106951 |
36.92 |
| 2026-02-07 00:00 |
21:42:04.75 |
-12:56:19.5 |
HIP 106951 |
40.25 |
| 2026-02-07 12:00 |
21:42:24.60 |
-12:54:43.8 |
HIP 107127 |
40.19 |
| 2026-02-08 00:00 |
21:42:44.46 |
-12:53:07.9 |
HIP 107412 |
38.85 |
| 2026-02-08 12:00 |
21:43:04.33 |
-12:51:31.8 |
HIP 107412 |
33.83 |
| 2026-02-09 00:00 |
21:43:24.19 |
-12:49:55.6 |
HIP 107412 |
28.83 |
| 2026-02-09 12:00 |
21:43:44.06 |
-12:48:19.2 |
HIP 107412 |
23.88 |
| 2026-02-10 00:00 |
21:44:03.94 |
-12:46:42.7 |
HIP 107412 |
19.00 |
| 2026-02-10 12:00 |
21:44:23.82 |
-12:45:06.0 |
HIP 107412 |
14.28 |
| 2026-02-11 00:00 |
21:44:43.69 |
-12:43:29.1 |
HIP 107412 |
9.95 |
| 2026-02-11 12:00 |
21:45:03.58 |
-12:41:52.1 |
HIP 107412 |
6.80 |
| 2026-02-12 00:00 |
21:45:23.46 |
-12:40:15.0 |
HIP 107412 |
6.76 |
| 2026-02-12 12:00 |
21:45:43.34 |
-12:38:37.7 |
HIP 107491 |
8.88 |
| 2026-02-13 00:00 |
21:46:03.22 |
-12:37:00.2 |
HIP 107491 |
3.77 |
| 2026-02-13 12:00 |
21:46:23.10 |
-12:35:22.7 |
HIP 107491 |
1.35 |
| 2026-02-14 00:00 |
21:46:42.98 |
-12:33:45.0 |
HIP 107491 |
6.46 |
| 2026-02-14 12:00 |
21:47:02.85 |
-12:32:07.1 |
HIP 107491 |
11.58 |
| 2026-02-15 00:00 |
21:47:22.72 |
-12:30:29.2 |
HIP 107491 |
16.70 |
| 2026-02-15 12:00 |
21:47:42.59 |
-12:28:51.1 |
HIP 107632 |
20.86 |
| 2026-02-16 00:00 |
21:48:02.45 |
-12:27:12.9 |
HIP 107632 |
18.55 |
| 2026-02-16 12:00 |
21:48:22.31 |
-12:25:34.6 |
HIP 107632 |
17.48 |
| 2026-02-17 00:00 |
21:48:42.17 |
-12:23:56.2 |
HIP 107632 |
17.87 |
| 2026-02-17 12:00 |
21:49:02.01 |
-12:22:17.7 |
HIP 107632 |
19.63 |
| 2026-02-18 00:00 |
21:49:21.85 |
-12:20:39.0 |
HIP 107632 |
22.45 |
| 2026-02-18 12:00 |
21:49:41.68 |
-12:19:00.3 |
HIP 107750 |
24.37 |
| 2026-02-19 00:00 |
21:50:01.50 |
-12:17:21.5 |
HIP 107750 |
26.49 |
| 2026-02-19 12:00 |
21:50:21.32 |
-12:15:42.6 |
HIP 107750 |
29.36 |
| 2026-02-20 00:00 |
21:50:41.12 |
-12:14:03.6 |
HIP 107750 |
32.78 |
| 2026-02-20 12:00 |
21:51:00.91 |
-12:12:24.6 |
HIP 107758 |
36.43 |
| 2026-02-21 00:00 |
21:51:20.69 |
-12:10:45.4 |
HIP 107758 |
37.77 |
| 2026-02-21 12:00 |
21:51:40.46 |
-12:09:06.2 |
HIP 107758 |
39.72 |
| 2026-02-22 00:00 |
21:52:00.22 |
-12:07:26.9 |
HIP 107778 |
41.93 |
| 2026-02-22 12:00 |
21:52:19.97 |
-12:05:47.6 |
HIP 108180 |
40.29 |
| 2026-02-23 00:00 |
21:52:39.70 |
-12:04:08.2 |
HIP 108180 |
35.25 |
| 2026-02-23 12:00 |
21:52:59.41 |
-12:02:28.7 |
HIP 108180 |
30.23 |
| 2026-02-24 00:00 |
21:53:19.11 |
-12:00:49.2 |
HIP 108180 |
25.25 |