メタデータ
| 項目 |
値 |
| Designation |
223P/Skiff |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2010-08-14T12:33:33.180480Z |
| Orbit solution date (soln_date, UTC) |
2026-07-06T12:12:41Z |
| Obs used |
779 |
| NEO |
- |
| M1 |
15.500 |
| 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) |
2011-09-23.0000000 |
| e |
0.41642458 |
| q (au) |
2.420544 |
| a (au) |
4.147782 |
| i (deg) |
27.054237 |
| Ω (om, deg) |
346.824669 |
| ω (w, deg) |
37.864284 |
| M (ma, deg) |
47.192576 |
等級
散乱 + 全体線形
$$
M_a = (17.223 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
17.223 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.631 |
| k |
0.800 |
| 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
ファインディングチャート
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
20:32:52.80 |
-48:11:29.9 |
HIP 101264 |
17.29 |
| 2026-07-29 12:00 |
20:32:16.96 |
-48:10:47.3 |
HIP 101264 |
12.65 |
| 2026-07-30 00:00 |
20:31:41.10 |
-48:10:01.1 |
HIP 101264 |
9.61 |
| 2026-07-30 12:00 |
20:31:05.23 |
-48:09:11.2 |
HIP 101264 |
9.83 |
| 2026-07-31 00:00 |
20:30:29.37 |
-48:08:17.8 |
HIP 101264 |
13.16 |
| 2026-07-31 12:00 |
20:29:53.53 |
-48:07:20.7 |
HIP 101264 |
17.95 |
| 2026-08-01 00:00 |
20:29:17.70 |
-48:06:19.9 |
HIP 101053 |
19.97 |
| 2026-08-01 12:00 |
20:28:41.91 |
-48:05:15.5 |
HIP 100956 |
19.77 |
| 2026-08-02 00:00 |
20:28:06.15 |
-48:04:07.5 |
HIP 100825 |
16.03 |
| 2026-08-02 12:00 |
20:27:30.45 |
-48:02:55.8 |
HIP 100825 |
10.17 |
| 2026-08-03 00:00 |
20:26:54.80 |
-48:01:40.4 |
HIP 100825 |
4.84 |
| 2026-08-03 12:00 |
20:26:19.22 |
-48:00:21.4 |
HIP 100825 |
4.15 |
| 2026-08-04 00:00 |
20:25:43.72 |
-47:58:58.7 |
HIP 100825 |
9.22 |
| 2026-08-04 12:00 |
20:25:08.31 |
-47:57:32.3 |
HIP 100825 |
15.07 |
| 2026-08-05 00:00 |
20:24:32.99 |
-47:56:02.3 |
HIP 100825 |
21.05 |
| 2026-08-05 12:00 |
20:23:57.77 |
-47:54:28.6 |
HIP 100653 |
25.08 |
| 2026-08-06 00:00 |
20:23:22.67 |
-47:52:51.2 |
HIP 100479 |
25.43 |
| 2026-08-06 12:00 |
20:22:47.69 |
-47:51:10.2 |
HIP 100479 |
22.52 |
| 2026-08-07 00:00 |
20:22:12.84 |
-47:49:25.6 |
HIP 100479 |
20.98 |
| 2026-08-07 12:00 |
20:21:38.13 |
-47:47:37.3 |
HIP 100479 |
21.11 |
| 2026-08-08 00:00 |
20:21:03.57 |
-47:45:45.3 |
HIP 100184 |
20.93 |
| 2026-08-08 12:00 |
20:20:29.17 |
-47:43:49.7 |
HIP 100184 |
15.05 |
| 2026-08-09 00:00 |
20:19:54.94 |
-47:41:50.5 |
HIP 100184 |
9.44 |
| 2026-08-09 12:00 |
20:19:20.89 |
-47:39:47.7 |
HIP 100184 |
5.03 |
| 2026-08-10 00:00 |
20:18:47.02 |
-47:37:41.3 |
HIP 100151 |
5.18 |
| 2026-08-10 12:00 |
20:18:13.35 |
-47:35:31.3 |
HIP 100151 |
10.11 |
| 2026-08-11 00:00 |
20:17:39.88 |
-47:33:17.8 |
HIP 100151 |
15.87 |
| 2026-08-11 12:00 |
20:17:06.62 |
-47:31:00.7 |
HIP 100151 |
21.79 |
| 2026-08-12 00:00 |
20:16:33.59 |
-47:28:40.0 |
HIP 99744 |
22.84 |
| 2026-08-12 12:00 |
20:16:00.78 |
-47:26:15.9 |
HIP 99744 |
17.35 |
| 2026-08-13 00:00 |
20:15:28.21 |
-47:23:48.2 |
HIP 99744 |
12.44 |
| 2026-08-13 12:00 |
20:14:55.89 |
-47:21:17.0 |
HIP 99744 |
9.07 |
| 2026-08-14 00:00 |
20:14:23.83 |
-47:18:42.5 |
HIP 99744 |
9.14 |
| 2026-08-14 12:00 |
20:13:52.02 |
-47:16:04.4 |
HIP 99744 |
12.56 |
| 2026-08-15 00:00 |
20:13:20.49 |
-47:13:23.0 |
HIP 99744 |
17.45 |
| 2026-08-15 12:00 |
20:12:49.23 |
-47:10:38.2 |
HIP 99548 |
18.87 |
| 2026-08-16 00:00 |
20:12:18.26 |
-47:07:50.1 |
HIP 99485 |
16.95 |
| 2026-08-16 12:00 |
20:11:47.58 |
-47:04:58.6 |
HIP 99485 |
12.10 |
| 2026-08-17 00:00 |
20:11:17.20 |
-47:02:03.9 |
HIP 99485 |
8.70 |
| 2026-08-17 12:00 |
20:10:47.13 |
-46:59:05.8 |
HIP 99485 |
8.61 |
| 2026-08-18 00:00 |
20:10:17.37 |
-46:56:04.6 |
HIP 99485 |
11.90 |
| 2026-08-18 12:00 |
20:09:47.93 |
-46:53:00.2 |
HIP 99417 |
12.48 |
| 2026-08-19 00:00 |
20:09:18.82 |
-46:49:52.6 |
HIP 99270 |
14.42 |