メタデータ
| 項目 |
値 |
| Designation |
C/1999 K6 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1999-07-24T16:11:00.306240Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:00Z |
| Obs used |
320 |
| NEO |
- |
| M1 |
14.000 |
| 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) |
1999-08-05.0000000 |
| e |
0.99352053 |
| q (au) |
2.246977 |
| a (au) |
346.784195 |
| i (deg) |
46.343845 |
| Ω (om, deg) |
245.372062 |
| ω (w, deg) |
56.763680 |
| M (ma, deg) |
0.001729 |
等級
散乱 + 全体線形
$$
M_a = (13.035 + 5.053\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
13.035 |
| n |
5.053 |
| gf |
1.000 |
| gb |
-1.000 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
05:54:08.99 |
+00:49:01.5 |
HIP 27842 |
10.71 |
| 2026-05-12 12:00 |
05:54:10.98 |
+00:49:09.3 |
HIP 27842 |
11.22 |
| 2026-05-13 00:00 |
05:54:12.99 |
+00:49:17.0 |
HIP 27842 |
11.74 |
| 2026-05-13 12:00 |
05:54:15.01 |
+00:49:24.7 |
HIP 27939 |
11.33 |
| 2026-05-14 00:00 |
05:54:17.04 |
+00:49:32.2 |
HIP 27939 |
10.92 |
| 2026-05-14 12:00 |
05:54:19.08 |
+00:49:39.6 |
HIP 27939 |
10.51 |
| 2026-05-15 00:00 |
05:54:21.14 |
+00:49:46.9 |
HIP 27939 |
10.11 |
| 2026-05-15 12:00 |
05:54:23.21 |
+00:49:54.2 |
HIP 27939 |
9.73 |
| 2026-05-16 00:00 |
05:54:25.28 |
+00:50:01.3 |
HIP 27939 |
9.35 |
| 2026-05-16 12:00 |
05:54:27.37 |
+00:50:08.3 |
HIP 27939 |
9.00 |
| 2026-05-17 00:00 |
05:54:29.47 |
+00:50:15.3 |
HIP 27939 |
8.66 |
| 2026-05-17 12:00 |
05:54:31.58 |
+00:50:22.1 |
HIP 27939 |
8.35 |
| 2026-05-18 00:00 |
05:54:33.70 |
+00:50:28.8 |
HIP 27939 |
8.06 |
| 2026-05-18 12:00 |
05:54:35.83 |
+00:50:35.5 |
HIP 27939 |
7.80 |
| 2026-05-19 00:00 |
05:54:37.98 |
+00:50:42.0 |
HIP 27939 |
7.57 |
| 2026-05-19 12:00 |
05:54:40.13 |
+00:50:48.4 |
HIP 27939 |
7.38 |
| 2026-05-20 00:00 |
05:54:42.29 |
+00:50:54.7 |
HIP 27939 |
7.22 |
| 2026-05-20 12:00 |
05:54:44.46 |
+00:51:01.0 |
HIP 27939 |
7.10 |
| 2026-05-21 00:00 |
05:54:46.64 |
+00:51:07.1 |
HIP 27939 |
7.03 |
| 2026-05-21 12:00 |
05:54:48.83 |
+00:51:13.1 |
HIP 27939 |
7.00 |
| 2026-05-22 00:00 |
05:54:51.03 |
+00:51:19.0 |
HIP 27939 |
7.02 |
| 2026-05-22 12:00 |
05:54:53.24 |
+00:51:24.8 |
HIP 27939 |
7.09 |
| 2026-05-23 00:00 |
05:54:55.46 |
+00:51:30.5 |
HIP 27939 |
7.20 |
| 2026-05-23 12:00 |
05:54:57.69 |
+00:51:36.1 |
HIP 27939 |
7.35 |
| 2026-05-24 00:00 |
05:54:59.92 |
+00:51:41.6 |
HIP 27939 |
7.55 |
| 2026-05-24 12:00 |
05:55:02.17 |
+00:51:46.9 |
HIP 27939 |
7.79 |
| 2026-05-25 00:00 |
05:55:04.42 |
+00:51:52.2 |
HIP 27939 |
8.06 |
| 2026-05-25 12:00 |
05:55:06.68 |
+00:51:57.4 |
HIP 27939 |
8.37 |
| 2026-05-26 00:00 |
05:55:08.95 |
+00:52:02.4 |
HIP 27939 |
8.70 |
| 2026-05-26 12:00 |
05:55:11.23 |
+00:52:07.4 |
HIP 27939 |
9.06 |
| 2026-05-27 00:00 |
05:55:13.51 |
+00:52:12.2 |
HIP 27939 |
9.45 |
| 2026-05-27 12:00 |
05:55:15.80 |
+00:52:16.9 |
HIP 27939 |
9.85 |
| 2026-05-28 00:00 |
05:55:18.10 |
+00:52:21.6 |
HIP 28056 |
10.05 |
| 2026-05-28 12:00 |
05:55:20.41 |
+00:52:26.1 |
HIP 28056 |
9.50 |
| 2026-05-29 00:00 |
05:55:22.72 |
+00:52:30.5 |
HIP 28056 |
8.96 |
| 2026-05-29 12:00 |
05:55:25.04 |
+00:52:34.8 |
HIP 28056 |
8.42 |
| 2026-05-30 00:00 |
05:55:27.37 |
+00:52:39.0 |
HIP 28056 |
7.89 |
| 2026-05-30 12:00 |
05:55:29.71 |
+00:52:43.1 |
HIP 28056 |
7.36 |
| 2026-05-31 00:00 |
05:55:32.05 |
+00:52:47.0 |
HIP 28056 |
6.84 |
| 2026-05-31 12:00 |
05:55:34.39 |
+00:52:50.9 |
HIP 28056 |
6.33 |
| 2026-06-01 00:00 |
05:55:36.75 |
+00:52:54.6 |
HIP 28056 |
5.83 |
| 2026-06-01 12:00 |
05:55:39.11 |
+00:52:58.3 |
HIP 28056 |
5.35 |
| 2026-06-02 00:00 |
05:55:41.47 |
+00:53:01.8 |
HIP 28056 |
4.89 |