メタデータ
| 項目 |
値 |
| Designation |
P/2005 S2 (Skiff) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2006-06-25T18:32:35.983680Z |
| Orbit solution date (soln_date, UTC) |
2026-09-15T13:42:26Z |
| Obs used |
103 |
| NEO |
- |
| M1 |
7.300 |
| 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) |
2008-04-24.0000000 |
| e |
0.19725890 |
| q (au) |
6.398461 |
| a (au) |
7.970765 |
| i (deg) |
3.140244 |
| Ω (om, deg) |
161.233888 |
| ω (w, deg) |
229.623433 |
| M (ma, deg) |
29.267006 |
等級
散乱 + 全体線形
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 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) |
| 2026-09-20 00:00 |
22:21:07.62 |
-09:58:34.2 |
HIP 110296 |
18.20 |
| 2026-09-20 12:00 |
22:20:58.22 |
-09:59:35.6 |
HIP 110296 |
16.11 |
| 2026-09-21 00:00 |
22:20:48.89 |
-10:00:36.6 |
HIP 110296 |
14.18 |
| 2026-09-21 12:00 |
22:20:39.63 |
-10:01:37.2 |
HIP 110296 |
12.47 |
| 2026-09-22 00:00 |
22:20:30.45 |
-10:02:37.2 |
HIP 110296 |
11.08 |
| 2026-09-22 12:00 |
22:20:21.35 |
-10:03:36.8 |
HIP 110296 |
10.10 |
| 2026-09-23 00:00 |
22:20:12.33 |
-10:04:36.0 |
HIP 110296 |
9.67 |
| 2026-09-23 12:00 |
22:20:03.39 |
-10:05:34.7 |
HIP 110296 |
9.83 |
| 2026-09-24 00:00 |
22:19:54.53 |
-10:06:32.9 |
HIP 110296 |
10.54 |
| 2026-09-24 12:00 |
22:19:45.75 |
-10:07:30.5 |
HIP 110296 |
11.70 |
| 2026-09-25 00:00 |
22:19:37.06 |
-10:08:27.7 |
HIP 110296 |
13.16 |
| 2026-09-25 12:00 |
22:19:28.45 |
-10:09:24.4 |
HIP 110296 |
14.83 |
| 2026-09-26 00:00 |
22:19:19.93 |
-10:10:20.6 |
HIP 110296 |
16.64 |
| 2026-09-26 12:00 |
22:19:11.50 |
-10:11:16.3 |
HIP 110296 |
18.54 |
| 2026-09-27 00:00 |
22:19:03.16 |
-10:12:11.4 |
HIP 110296 |
20.49 |
| 2026-09-27 12:00 |
22:18:54.91 |
-10:13:06.0 |
HIP 110296 |
22.47 |
| 2026-09-28 00:00 |
22:18:46.75 |
-10:14:00.1 |
HIP 110296 |
24.47 |
| 2026-09-28 12:00 |
22:18:38.68 |
-10:14:53.6 |
HIP 110296 |
26.48 |
| 2026-09-29 00:00 |
22:18:30.71 |
-10:15:46.6 |
HIP 110296 |
28.50 |
| 2026-09-29 12:00 |
22:18:22.83 |
-10:16:39.0 |
HIP 109995 |
28.53 |
| 2026-09-30 00:00 |
22:18:15.05 |
-10:17:30.8 |
HIP 109995 |
26.45 |
| 2026-09-30 12:00 |
22:18:07.37 |
-10:18:22.1 |
HIP 109995 |
24.39 |
| 2026-10-01 00:00 |
22:17:59.79 |
-10:19:12.8 |
HIP 109995 |
22.36 |
| 2026-10-01 12:00 |
22:17:52.30 |
-10:20:02.9 |
HIP 109995 |
20.36 |
| 2026-10-02 00:00 |
22:17:44.92 |
-10:20:52.4 |
HIP 109995 |
18.39 |
| 2026-10-02 12:00 |
22:17:37.64 |
-10:21:41.3 |
HIP 109995 |
16.45 |
| 2026-10-03 00:00 |
22:17:30.47 |
-10:22:29.7 |
HIP 109995 |
14.55 |
| 2026-10-03 12:00 |
22:17:23.40 |
-10:23:17.4 |
HIP 109995 |
12.68 |
| 2026-10-04 00:00 |
22:17:16.43 |
-10:24:04.5 |
HIP 109995 |
10.86 |
| 2026-10-04 12:00 |
22:17:09.58 |
-10:24:51.0 |
HIP 109995 |
9.09 |
| 2026-10-05 00:00 |
22:17:02.83 |
-10:25:36.8 |
HIP 109995 |
7.38 |
| 2026-10-05 12:00 |
22:16:56.19 |
-10:26:22.0 |
HIP 109995 |
5.77 |
| 2026-10-06 00:00 |
22:16:49.66 |
-10:27:06.6 |
HIP 109995 |
4.34 |
| 2026-10-06 12:00 |
22:16:43.25 |
-10:27:50.5 |
HIP 109995 |
3.27 |
| 2026-10-07 00:00 |
22:16:36.94 |
-10:28:33.8 |
HIP 109995 |
2.93 |
| 2026-10-07 12:00 |
22:16:30.75 |
-10:29:16.4 |
HIP 109995 |
3.48 |
| 2026-10-08 00:00 |
22:16:24.68 |
-10:29:58.3 |
HIP 109995 |
4.60 |
| 2026-10-08 12:00 |
22:16:18.72 |
-10:30:39.6 |
HIP 109995 |
5.94 |
| 2026-10-09 00:00 |
22:16:12.88 |
-10:31:20.2 |
HIP 109995 |
7.36 |
| 2026-10-09 12:00 |
22:16:07.16 |
-10:32:00.1 |
HIP 109995 |
8.81 |
| 2026-10-10 00:00 |
22:16:01.55 |
-10:32:39.3 |
HIP 109995 |
10.25 |
| 2026-10-10 12:00 |
22:15:56.07 |
-10:33:17.8 |
HIP 109995 |
11.69 |
| 2026-10-11 00:00 |
22:15:50.71 |
-10:33:55.6 |
HIP 109995 |
13.11 |