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) |
| 2026-07-29 00:00 |
05:06:39.09 |
-52:22:46.7 |
HIP 23808 |
3.71 |
| 2026-07-29 12:00 |
05:06:42.46 |
-52:23:15.8 |
HIP 23808 |
3.07 |
| 2026-07-30 00:00 |
05:06:45.80 |
-52:23:45.0 |
HIP 23808 |
2.48 |
| 2026-07-30 12:00 |
05:06:49.11 |
-52:24:14.5 |
HIP 23808 |
1.97 |
| 2026-07-31 00:00 |
05:06:52.39 |
-52:24:44.3 |
HIP 23808 |
1.61 |
| 2026-07-31 12:00 |
05:06:55.64 |
-52:25:14.2 |
HIP 23808 |
1.53 |
| 2026-08-01 00:00 |
05:06:58.86 |
-52:25:44.4 |
HIP 23808 |
1.76 |
| 2026-08-01 12:00 |
05:07:02.05 |
-52:26:14.9 |
HIP 23808 |
2.20 |
| 2026-08-02 00:00 |
05:07:05.21 |
-52:26:45.6 |
HIP 23808 |
2.76 |
| 2026-08-02 12:00 |
05:07:08.34 |
-52:27:16.5 |
HIP 23808 |
3.37 |
| 2026-08-03 00:00 |
05:07:11.43 |
-52:27:47.6 |
HIP 23808 |
4.02 |
| 2026-08-03 12:00 |
05:07:14.50 |
-52:28:19.0 |
HIP 23808 |
4.68 |
| 2026-08-04 00:00 |
05:07:17.54 |
-52:28:50.6 |
HIP 23808 |
5.35 |
| 2026-08-04 12:00 |
05:07:20.54 |
-52:29:22.4 |
HIP 23808 |
6.03 |
| 2026-08-05 00:00 |
05:07:23.51 |
-52:29:54.4 |
HIP 23808 |
6.72 |
| 2026-08-05 12:00 |
05:07:26.45 |
-52:30:26.6 |
HIP 23808 |
7.41 |
| 2026-08-06 00:00 |
05:07:29.36 |
-52:30:59.1 |
HIP 23808 |
8.10 |
| 2026-08-06 12:00 |
05:07:32.23 |
-52:31:31.8 |
HIP 23808 |
8.79 |
| 2026-08-07 00:00 |
05:07:35.07 |
-52:32:04.7 |
HIP 23808 |
9.48 |
| 2026-08-07 12:00 |
05:07:37.88 |
-52:32:37.8 |
HIP 23808 |
10.18 |
| 2026-08-08 00:00 |
05:07:40.65 |
-52:33:11.1 |
HIP 23808 |
10.87 |
| 2026-08-08 12:00 |
05:07:43.39 |
-52:33:44.6 |
HIP 23808 |
11.57 |
| 2026-08-09 00:00 |
05:07:46.10 |
-52:34:18.3 |
HIP 23808 |
12.27 |
| 2026-08-09 12:00 |
05:07:48.77 |
-52:34:52.2 |
HIP 23808 |
12.96 |
| 2026-08-10 00:00 |
05:07:51.41 |
-52:35:26.3 |
HIP 23808 |
13.66 |
| 2026-08-10 12:00 |
05:07:54.02 |
-52:36:00.6 |
HIP 23808 |
14.35 |
| 2026-08-11 00:00 |
05:07:56.59 |
-52:36:35.1 |
HIP 23808 |
15.05 |
| 2026-08-11 12:00 |
05:07:59.12 |
-52:37:09.8 |
HIP 23808 |
15.74 |
| 2026-08-12 00:00 |
05:08:01.62 |
-52:37:44.7 |
HIP 23808 |
16.43 |
| 2026-08-12 12:00 |
05:08:04.09 |
-52:38:19.8 |
HIP 23808 |
17.13 |
| 2026-08-13 00:00 |
05:08:06.52 |
-52:38:55.0 |
HIP 24040 |
17.64 |
| 2026-08-13 12:00 |
05:08:08.91 |
-52:39:30.4 |
HIP 24040 |
17.28 |
| 2026-08-14 00:00 |
05:08:11.27 |
-52:40:06.0 |
HIP 24040 |
16.95 |
| 2026-08-14 12:00 |
05:08:13.59 |
-52:40:41.8 |
HIP 24040 |
16.65 |
| 2026-08-15 00:00 |
05:08:15.87 |
-52:41:17.8 |
HIP 24040 |
16.37 |
| 2026-08-15 12:00 |
05:08:18.12 |
-52:41:53.9 |
HIP 24040 |
16.13 |
| 2026-08-16 00:00 |
05:08:20.33 |
-52:42:30.2 |
HIP 24040 |
15.91 |
| 2026-08-16 12:00 |
05:08:22.51 |
-52:43:06.6 |
HIP 24040 |
15.74 |
| 2026-08-17 00:00 |
05:08:24.65 |
-52:43:43.2 |
HIP 24040 |
15.59 |
| 2026-08-17 12:00 |
05:08:26.75 |
-52:44:20.0 |
HIP 24040 |
15.48 |
| 2026-08-18 00:00 |
05:08:28.81 |
-52:44:56.9 |
HIP 24040 |
15.41 |
| 2026-08-18 12:00 |
05:08:30.84 |
-52:45:34.0 |
HIP 24040 |
15.38 |
| 2026-08-19 00:00 |
05:08:32.82 |
-52:46:11.2 |
HIP 24040 |
15.38 |