メタデータ
| 項目 |
値 |
| Designation |
C/2005 K1 (Skiff) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2005-11-21T04:38:57.312960Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:49Z |
| Obs used |
616 |
| NEO |
- |
| M1 |
6.900 |
| K1 |
12.500 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2005-08-23.0000000 |
| e |
1.00329003 |
| q (au) |
3.692912 |
| a (au) |
-1122.454642 |
| i (deg) |
77.747578 |
| Ω (om, deg) |
106.305012 |
| ω (w, deg) |
134.938813 |
| M (ma, deg) |
-0.002364 |
等級
散乱 + 全体線形
$$
M_a = (4.163 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
4.163 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| 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) |
| 2026-05-12 00:00 |
04:54:44.49 |
-52:10:59.8 |
HIP 22748 |
13.56 |
| 2026-05-12 12:00 |
04:54:49.11 |
-52:10:38.0 |
HIP 22748 |
14.33 |
| 2026-05-13 00:00 |
04:54:53.74 |
-52:10:16.6 |
HIP 22748 |
15.11 |
| 2026-05-13 12:00 |
04:54:58.38 |
-52:09:55.5 |
HIP 22748 |
15.88 |
| 2026-05-14 00:00 |
04:55:03.04 |
-52:09:34.7 |
HIP 22748 |
16.66 |
| 2026-05-14 12:00 |
04:55:07.72 |
-52:09:14.3 |
HIP 22748 |
17.44 |
| 2026-05-15 00:00 |
04:55:12.41 |
-52:08:54.2 |
HIP 22748 |
18.21 |
| 2026-05-15 12:00 |
04:55:17.11 |
-52:08:34.4 |
HIP 22748 |
18.99 |
| 2026-05-16 00:00 |
04:55:21.82 |
-52:08:14.9 |
HIP 22748 |
19.77 |
| 2026-05-16 12:00 |
04:55:26.55 |
-52:07:55.8 |
HIP 22748 |
20.54 |
| 2026-05-17 00:00 |
04:55:31.29 |
-52:07:37.1 |
HIP 22748 |
21.32 |
| 2026-05-17 12:00 |
04:55:36.04 |
-52:07:18.6 |
HIP 22748 |
22.09 |
| 2026-05-18 00:00 |
04:55:40.81 |
-52:07:00.5 |
HIP 22748 |
22.87 |
| 2026-05-18 12:00 |
04:55:45.59 |
-52:06:42.7 |
HIP 22748 |
23.64 |
| 2026-05-19 00:00 |
04:55:50.37 |
-52:06:25.3 |
HIP 22748 |
24.41 |
| 2026-05-19 12:00 |
04:55:55.17 |
-52:06:08.2 |
HIP 22748 |
25.18 |
| 2026-05-20 00:00 |
04:55:59.98 |
-52:05:51.5 |
HIP 22748 |
25.96 |
| 2026-05-20 12:00 |
04:56:04.80 |
-52:05:35.1 |
HIP 22748 |
26.73 |
| 2026-05-21 00:00 |
04:56:09.63 |
-52:05:19.0 |
HIP 22748 |
27.50 |
| 2026-05-21 12:00 |
04:56:14.47 |
-52:05:03.3 |
HIP 22932 |
27.82 |
| 2026-05-22 00:00 |
04:56:19.31 |
-52:04:47.9 |
HIP 22932 |
28.12 |
| 2026-05-22 12:00 |
04:56:24.17 |
-52:04:32.9 |
HIP 22932 |
28.44 |
| 2026-05-23 00:00 |
04:56:29.04 |
-52:04:18.2 |
HIP 22932 |
28.77 |
| 2026-05-23 12:00 |
04:56:33.91 |
-52:04:03.8 |
HIP 22932 |
29.11 |
| 2026-05-24 00:00 |
04:56:38.79 |
-52:03:49.8 |
HIP 22932 |
29.46 |
| 2026-05-24 12:00 |
04:56:43.68 |
-52:03:36.2 |
HIP 22932 |
29.82 |
| 2026-05-25 00:00 |
04:56:48.58 |
-52:03:22.9 |
HIP 22932 |
30.19 |
| 2026-05-25 12:00 |
04:56:53.48 |
-52:03:09.9 |
HIP 22932 |
30.58 |
| 2026-05-26 00:00 |
04:56:58.39 |
-52:02:57.3 |
HIP 22932 |
30.97 |
| 2026-05-26 12:00 |
04:57:03.31 |
-52:02:45.0 |
HIP 22932 |
31.37 |
| 2026-05-27 00:00 |
04:57:08.24 |
-52:02:33.1 |
HIP 22932 |
31.78 |
| 2026-05-27 12:00 |
04:57:13.17 |
-52:02:21.5 |
HIP 22932 |
32.20 |
| 2026-05-28 00:00 |
04:57:18.10 |
-52:02:10.2 |
HIP 22932 |
32.63 |
| 2026-05-28 12:00 |
04:57:23.04 |
-52:01:59.3 |
HIP 22932 |
33.07 |
| 2026-05-29 00:00 |
04:57:27.99 |
-52:01:48.8 |
HIP 22932 |
33.51 |
| 2026-05-29 12:00 |
04:57:32.94 |
-52:01:38.6 |
HIP 22932 |
33.96 |
| 2026-05-30 00:00 |
04:57:37.89 |
-52:01:28.7 |
HIP 22932 |
34.42 |
| 2026-05-30 12:00 |
04:57:42.85 |
-52:01:19.2 |
HIP 22932 |
34.88 |
| 2026-05-31 00:00 |
04:57:47.82 |
-52:01:10.1 |
HIP 23376 |
34.90 |
| 2026-05-31 12:00 |
04:57:52.78 |
-52:01:01.3 |
HIP 23376 |
34.15 |
| 2026-06-01 00:00 |
04:57:57.75 |
-52:00:52.8 |
HIP 23376 |
33.40 |
| 2026-06-01 12:00 |
04:58:02.73 |
-52:00:44.7 |
HIP 23376 |
32.65 |
| 2026-06-02 00:00 |
04:58:07.70 |
-52:00:36.9 |
HIP 23376 |
31.89 |