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) |
| 2026-03-26 00:00 |
04:49:17.10 |
-53:05:33.1 |
HIP 22562 |
26.37 |
| 2026-03-26 12:00 |
04:49:19.10 |
-53:04:48.4 |
HIP 22562 |
26.70 |
| 2026-03-27 00:00 |
04:49:21.14 |
-53:04:03.8 |
HIP 22562 |
27.05 |
| 2026-03-27 12:00 |
04:49:23.22 |
-53:03:19.4 |
HIP 22322 |
26.78 |
| 2026-03-28 00:00 |
04:49:25.33 |
-53:02:35.2 |
HIP 22322 |
26.18 |
| 2026-03-28 12:00 |
04:49:27.49 |
-53:01:51.0 |
HIP 22322 |
25.59 |
| 2026-03-29 00:00 |
04:49:29.68 |
-53:01:07.1 |
HIP 22322 |
25.02 |
| 2026-03-29 12:00 |
04:49:31.91 |
-53:00:23.3 |
HIP 22322 |
24.46 |
| 2026-03-30 00:00 |
04:49:34.18 |
-52:59:39.6 |
HIP 22322 |
23.93 |
| 2026-03-30 12:00 |
04:49:36.48 |
-52:58:56.1 |
HIP 22322 |
23.42 |
| 2026-03-31 00:00 |
04:49:38.82 |
-52:58:12.8 |
HIP 22516 |
22.67 |
| 2026-03-31 12:00 |
04:49:41.20 |
-52:57:29.6 |
HIP 22516 |
21.86 |
| 2026-04-01 00:00 |
04:49:43.61 |
-52:56:46.6 |
HIP 22516 |
21.06 |
| 2026-04-01 12:00 |
04:49:46.07 |
-52:56:03.7 |
HIP 22516 |
20.26 |
| 2026-04-02 00:00 |
04:49:48.55 |
-52:55:21.0 |
HIP 22516 |
19.45 |
| 2026-04-02 12:00 |
04:49:51.08 |
-52:54:38.5 |
HIP 22516 |
18.65 |
| 2026-04-03 00:00 |
04:49:53.64 |
-52:53:56.2 |
HIP 22516 |
17.85 |
| 2026-04-03 12:00 |
04:49:56.23 |
-52:53:14.0 |
HIP 22516 |
17.05 |
| 2026-04-04 00:00 |
04:49:58.86 |
-52:52:32.0 |
HIP 22516 |
16.25 |
| 2026-04-04 12:00 |
04:50:01.53 |
-52:51:50.2 |
HIP 22516 |
15.45 |
| 2026-04-05 00:00 |
04:50:04.23 |
-52:51:08.6 |
HIP 22516 |
14.65 |
| 2026-04-05 12:00 |
04:50:06.97 |
-52:50:27.2 |
HIP 22516 |
13.85 |
| 2026-04-06 00:00 |
04:50:09.74 |
-52:49:46.0 |
HIP 22516 |
13.06 |
| 2026-04-06 12:00 |
04:50:12.54 |
-52:49:04.9 |
HIP 22516 |
12.26 |
| 2026-04-07 00:00 |
04:50:15.38 |
-52:48:24.1 |
HIP 22516 |
11.47 |
| 2026-04-07 12:00 |
04:50:18.26 |
-52:47:43.4 |
HIP 22516 |
10.69 |
| 2026-04-08 00:00 |
04:50:21.17 |
-52:47:03.0 |
HIP 22516 |
9.91 |
| 2026-04-08 12:00 |
04:50:24.11 |
-52:46:22.7 |
HIP 22516 |
9.13 |
| 2026-04-09 00:00 |
04:50:27.08 |
-52:45:42.6 |
HIP 22516 |
8.36 |
| 2026-04-09 12:00 |
04:50:30.09 |
-52:45:02.8 |
HIP 22516 |
7.60 |
| 2026-04-10 00:00 |
04:50:33.13 |
-52:44:23.2 |
HIP 22516 |
6.86 |
| 2026-04-10 12:00 |
04:50:36.21 |
-52:43:43.7 |
HIP 22516 |
6.13 |
| 2026-04-11 00:00 |
04:50:39.31 |
-52:43:04.5 |
HIP 22516 |
5.42 |
| 2026-04-11 12:00 |
04:50:42.45 |
-52:42:25.5 |
HIP 22516 |
4.76 |
| 2026-04-12 00:00 |
04:50:45.62 |
-52:41:46.8 |
HIP 22516 |
4.14 |
| 2026-04-12 12:00 |
04:50:48.83 |
-52:41:08.2 |
HIP 22516 |
3.61 |
| 2026-04-13 00:00 |
04:50:52.06 |
-52:40:29.9 |
HIP 22516 |
3.20 |
| 2026-04-13 12:00 |
04:50:55.33 |
-52:39:51.8 |
HIP 22516 |
2.96 |
| 2026-04-14 00:00 |
04:50:58.62 |
-52:39:13.9 |
HIP 22516 |
2.94 |
| 2026-04-14 12:00 |
04:51:01.95 |
-52:38:36.2 |
HIP 22516 |
3.14 |
| 2026-04-15 00:00 |
04:51:05.31 |
-52:37:58.8 |
HIP 22516 |
3.52 |
| 2026-04-15 12:00 |
04:51:08.70 |
-52:37:21.7 |
HIP 22516 |
4.03 |
| 2026-04-16 00:00 |
04:51:12.12 |
-52:36:44.7 |
HIP 22516 |
4.64 |