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
$$
M_a = (2.982 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
2.982 |
| n |
6.000 |
| gf |
0.997 |
| gb |
-0.717 |
| 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) |
| 2026-06-01 00:00 |
22:40:47.19 |
-07:43:08.7 |
HIP 111863 |
20.24 |
| 2026-06-01 12:00 |
22:40:53.39 |
-07:42:34.7 |
HIP 111863 |
21.52 |
| 2026-06-02 00:00 |
22:40:59.48 |
-07:42:01.4 |
HIP 111863 |
22.82 |
| 2026-06-02 12:00 |
22:41:05.45 |
-07:41:28.9 |
HIP 111863 |
24.13 |
| 2026-06-03 00:00 |
22:41:11.30 |
-07:40:57.0 |
HIP 111863 |
25.44 |
| 2026-06-03 12:00 |
22:41:17.04 |
-07:40:25.9 |
HIP 111863 |
26.76 |
| 2026-06-04 00:00 |
22:41:22.65 |
-07:39:55.5 |
HIP 111863 |
28.06 |
| 2026-06-04 12:00 |
22:41:28.14 |
-07:39:25.8 |
HIP 111863 |
29.35 |
| 2026-06-05 00:00 |
22:41:33.51 |
-07:38:56.9 |
HIP 111863 |
30.63 |
| 2026-06-05 12:00 |
22:41:38.76 |
-07:38:28.7 |
HIP 111863 |
31.89 |
| 2026-06-06 00:00 |
22:41:43.89 |
-07:38:01.2 |
HIP 111863 |
33.13 |
| 2026-06-06 12:00 |
22:41:48.90 |
-07:37:34.4 |
HIP 112178 |
32.29 |
| 2026-06-07 00:00 |
22:41:53.78 |
-07:37:08.4 |
HIP 112178 |
31.18 |
| 2026-06-07 12:00 |
22:41:58.54 |
-07:36:43.2 |
HIP 112178 |
30.12 |
| 2026-06-08 00:00 |
22:42:03.18 |
-07:36:18.7 |
HIP 112178 |
29.10 |
| 2026-06-08 12:00 |
22:42:07.70 |
-07:35:54.9 |
HIP 112178 |
28.12 |
| 2026-06-09 00:00 |
22:42:12.09 |
-07:35:31.9 |
HIP 112178 |
27.19 |
| 2026-06-09 12:00 |
22:42:16.36 |
-07:35:09.6 |
HIP 112178 |
26.31 |
| 2026-06-10 00:00 |
22:42:20.50 |
-07:34:48.1 |
HIP 112178 |
25.46 |
| 2026-06-10 12:00 |
22:42:24.52 |
-07:34:27.4 |
HIP 112178 |
24.67 |
| 2026-06-11 00:00 |
22:42:28.41 |
-07:34:07.4 |
HIP 112178 |
23.92 |
| 2026-06-11 12:00 |
22:42:32.18 |
-07:33:48.2 |
HIP 112178 |
23.21 |
| 2026-06-12 00:00 |
22:42:35.82 |
-07:33:29.8 |
HIP 112178 |
22.55 |
| 2026-06-12 12:00 |
22:42:39.34 |
-07:33:12.1 |
HIP 112178 |
21.94 |
| 2026-06-13 00:00 |
22:42:42.73 |
-07:32:55.2 |
HIP 112178 |
21.37 |
| 2026-06-13 12:00 |
22:42:45.99 |
-07:32:39.1 |
HIP 112178 |
20.85 |
| 2026-06-14 00:00 |
22:42:49.13 |
-07:32:23.8 |
HIP 112178 |
20.37 |
| 2026-06-14 12:00 |
22:42:52.14 |
-07:32:09.2 |
HIP 112178 |
19.93 |
| 2026-06-15 00:00 |
22:42:55.02 |
-07:31:55.4 |
HIP 112178 |
19.53 |
| 2026-06-15 12:00 |
22:42:57.77 |
-07:31:42.4 |
HIP 112178 |
19.17 |
| 2026-06-16 00:00 |
22:43:00.40 |
-07:31:30.2 |
HIP 112178 |
18.86 |
| 2026-06-16 12:00 |
22:43:02.90 |
-07:31:18.8 |
HIP 112178 |
18.58 |
| 2026-06-17 00:00 |
22:43:05.27 |
-07:31:08.1 |
HIP 112178 |
18.33 |
| 2026-06-17 12:00 |
22:43:07.51 |
-07:30:58.3 |
HIP 112178 |
18.12 |
| 2026-06-18 00:00 |
22:43:09.63 |
-07:30:49.2 |
HIP 112178 |
17.94 |
| 2026-06-18 12:00 |
22:43:11.61 |
-07:30:40.9 |
HIP 112178 |
17.78 |
| 2026-06-19 00:00 |
22:43:13.47 |
-07:30:33.5 |
HIP 112178 |
17.65 |
| 2026-06-19 12:00 |
22:43:15.20 |
-07:30:26.8 |
HIP 112178 |
17.55 |
| 2026-06-20 00:00 |
22:43:16.80 |
-07:30:20.8 |
HIP 112178 |
17.47 |
| 2026-06-20 12:00 |
22:43:18.28 |
-07:30:15.7 |
HIP 112178 |
17.41 |
| 2026-06-21 00:00 |
22:43:19.62 |
-07:30:11.4 |
HIP 112178 |
17.37 |
| 2026-06-21 12:00 |
22:43:20.84 |
-07:30:07.8 |
HIP 112178 |
17.34 |
| 2026-06-22 00:00 |
22:43:21.93 |
-07:30:05.1 |
HIP 112178 |
17.33 |