C/1999 K6 (LINEAR)
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) |
| 2026-02-03 00:00 |
05:53:26.96 |
+00:10:20.5 |
HIP 27794 |
7.91 |
| 2026-02-03 12:00 |
05:53:25.24 |
+00:10:29.9 |
HIP 27794 |
7.49 |
| 2026-02-04 00:00 |
05:53:23.53 |
+00:10:39.4 |
HIP 27794 |
7.08 |
| 2026-02-04 12:00 |
05:53:21.83 |
+00:10:49.0 |
HIP 27794 |
6.68 |
| 2026-02-05 00:00 |
05:53:20.16 |
+00:10:58.8 |
HIP 27794 |
6.29 |
| 2026-02-05 12:00 |
05:53:18.50 |
+00:11:08.5 |
HIP 27794 |
5.92 |
| 2026-02-06 00:00 |
05:53:16.86 |
+00:11:18.4 |
HIP 27794 |
5.56 |
| 2026-02-06 12:00 |
05:53:15.23 |
+00:11:28.4 |
HIP 27794 |
5.22 |
| 2026-02-07 00:00 |
05:53:13.63 |
+00:11:38.5 |
HIP 27794 |
4.90 |
| 2026-02-07 12:00 |
05:53:12.04 |
+00:11:48.6 |
HIP 27794 |
4.60 |
| 2026-02-08 00:00 |
05:53:10.47 |
+00:11:58.8 |
HIP 27794 |
4.33 |
| 2026-02-08 12:00 |
05:53:08.91 |
+00:12:09.2 |
HIP 27794 |
4.09 |
| 2026-02-09 00:00 |
05:53:07.38 |
+00:12:19.5 |
HIP 27794 |
3.89 |
| 2026-02-09 12:00 |
05:53:05.86 |
+00:12:30.0 |
HIP 27794 |
3.73 |
| 2026-02-10 00:00 |
05:53:04.36 |
+00:12:40.6 |
HIP 27794 |
3.61 |
| 2026-02-10 12:00 |
05:53:02.87 |
+00:12:51.2 |
HIP 27794 |
3.55 |
| 2026-02-11 00:00 |
05:53:01.41 |
+00:13:02.0 |
HIP 27794 |
3.53 |
| 2026-02-11 12:00 |
05:52:59.97 |
+00:13:12.8 |
HIP 27794 |
3.56 |
| 2026-02-12 00:00 |
05:52:58.54 |
+00:13:23.6 |
HIP 27794 |
3.64 |
| 2026-02-12 12:00 |
05:52:57.13 |
+00:13:34.6 |
HIP 27794 |
3.76 |
| 2026-02-13 00:00 |
05:52:55.74 |
+00:13:45.6 |
HIP 27794 |
3.92 |
| 2026-02-13 12:00 |
05:52:54.37 |
+00:13:56.7 |
HIP 27794 |
4.11 |
| 2026-02-14 00:00 |
05:52:53.02 |
+00:14:07.9 |
HIP 27794 |
4.33 |
| 2026-02-14 12:00 |
05:52:51.69 |
+00:14:19.2 |
HIP 27794 |
4.57 |
| 2026-02-15 00:00 |
05:52:50.37 |
+00:14:30.5 |
HIP 27794 |
4.83 |
| 2026-02-15 12:00 |
05:52:49.08 |
+00:14:41.9 |
HIP 27794 |
5.11 |
| 2026-02-16 00:00 |
05:52:47.81 |
+00:14:53.3 |
HIP 27794 |
5.39 |
| 2026-02-16 12:00 |
05:52:46.55 |
+00:15:04.9 |
HIP 27794 |
5.69 |
| 2026-02-17 00:00 |
05:52:45.32 |
+00:15:16.5 |
HIP 27794 |
5.99 |
| 2026-02-17 12:00 |
05:52:44.10 |
+00:15:28.1 |
HIP 27794 |
6.30 |
| 2026-02-18 00:00 |
05:52:42.91 |
+00:15:39.9 |
HIP 27794 |
6.61 |
| 2026-02-18 12:00 |
05:52:41.73 |
+00:15:51.7 |
HIP 27794 |
6.92 |
| 2026-02-19 00:00 |
05:52:40.58 |
+00:16:03.5 |
HIP 27794 |
7.24 |
| 2026-02-19 12:00 |
05:52:39.44 |
+00:16:15.4 |
HIP 27794 |
7.55 |
| 2026-02-20 00:00 |
05:52:38.33 |
+00:16:27.4 |
HIP 27794 |
7.87 |
| 2026-02-20 12:00 |
05:52:37.23 |
+00:16:39.5 |
HIP 27794 |
8.19 |
| 2026-02-21 00:00 |
05:52:36.16 |
+00:16:51.5 |
HIP 27794 |
8.51 |
| 2026-02-21 12:00 |
05:52:35.10 |
+00:17:03.7 |
HIP 27794 |
8.82 |
| 2026-02-22 00:00 |
05:52:34.07 |
+00:17:15.9 |
HIP 27794 |
9.14 |
| 2026-02-22 12:00 |
05:52:33.06 |
+00:17:28.2 |
HIP 27794 |
9.45 |
| 2026-02-23 00:00 |
05:52:32.07 |
+00:17:40.5 |
HIP 27794 |
9.77 |
| 2026-02-23 12:00 |
05:52:31.10 |
+00:17:52.8 |
HIP 27794 |
10.08 |
| 2026-02-24 00:00 |
05:52:30.14 |
+00:18:05.3 |
HIP 27794 |
10.39 |