メタデータ
| 項目 |
値 |
| Designation |
C/2006 K1 (McNaught) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2007-07-20T13:20:54.202560Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:57Z |
| Obs used |
415 |
| NEO |
- |
| M1 |
10.600 |
| K1 |
4.750 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2007-09-22.0000000 |
| e |
1.00160448 |
| q (au) |
4.425528 |
| a (au) |
-2758.226517 |
| i (deg) |
53.876740 |
| Ω (om, deg) |
72.115378 |
| ω (w, deg) |
296.442521 |
| M (ma, deg) |
0.000432 |
等級
散乱 + 全体線形
$$
M_a = (9.837 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
9.837 |
| n |
2.000 |
| gf |
0.971 |
| gb |
-0.939 |
| k |
1.000 |
| δ90 |
9.999 |
| 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) |
| 2026-06-01 00:00 |
11:12:13.36 |
+62:27:46.6 |
HIP 54869 |
16.86 |
| 2026-06-01 12:00 |
11:12:13.16 |
+62:27:06.3 |
HIP 54869 |
16.45 |
| 2026-06-02 00:00 |
11:12:13.02 |
+62:26:25.9 |
HIP 54869 |
16.06 |
| 2026-06-02 12:00 |
11:12:12.93 |
+62:25:45.3 |
HIP 54869 |
15.68 |
| 2026-06-03 00:00 |
11:12:12.90 |
+62:25:04.7 |
HIP 54869 |
15.31 |
| 2026-06-03 12:00 |
11:12:12.92 |
+62:24:24.0 |
HIP 54869 |
14.96 |
| 2026-06-04 00:00 |
11:12:12.99 |
+62:23:43.2 |
HIP 54869 |
14.63 |
| 2026-06-04 12:00 |
11:12:13.12 |
+62:23:02.2 |
HIP 54869 |
14.31 |
| 2026-06-05 00:00 |
11:12:13.30 |
+62:22:21.2 |
HIP 54869 |
14.02 |
| 2026-06-05 12:00 |
11:12:13.54 |
+62:21:40.1 |
HIP 54869 |
13.74 |
| 2026-06-06 00:00 |
11:12:13.82 |
+62:20:58.9 |
HIP 54869 |
13.49 |
| 2026-06-06 12:00 |
11:12:14.16 |
+62:20:17.6 |
HIP 54869 |
13.27 |
| 2026-06-07 00:00 |
11:12:14.56 |
+62:19:36.3 |
HIP 54869 |
13.07 |
| 2026-06-07 12:00 |
11:12:15.01 |
+62:18:54.8 |
HIP 54869 |
12.89 |
| 2026-06-08 00:00 |
11:12:15.51 |
+62:18:13.3 |
HIP 54869 |
12.75 |
| 2026-06-08 12:00 |
11:12:16.06 |
+62:17:31.7 |
HIP 54869 |
12.64 |
| 2026-06-09 00:00 |
11:12:16.67 |
+62:16:50.1 |
HIP 54869 |
12.55 |
| 2026-06-09 12:00 |
11:12:17.33 |
+62:16:08.4 |
HIP 54869 |
12.50 |
| 2026-06-10 00:00 |
11:12:18.05 |
+62:15:26.6 |
HIP 54869 |
12.49 |
| 2026-06-10 12:00 |
11:12:18.81 |
+62:14:44.7 |
HIP 54869 |
12.50 |
| 2026-06-11 00:00 |
11:12:19.63 |
+62:14:02.8 |
HIP 54869 |
12.55 |
| 2026-06-11 12:00 |
11:12:20.51 |
+62:13:20.8 |
HIP 54869 |
12.64 |
| 2026-06-12 00:00 |
11:12:21.43 |
+62:12:38.8 |
HIP 54869 |
12.75 |
| 2026-06-12 12:00 |
11:12:22.41 |
+62:11:56.7 |
HIP 54869 |
12.90 |
| 2026-06-13 00:00 |
11:12:23.44 |
+62:11:14.6 |
HIP 54869 |
13.08 |
| 2026-06-13 12:00 |
11:12:24.52 |
+62:10:32.4 |
HIP 54869 |
13.30 |
| 2026-06-14 00:00 |
11:12:25.66 |
+62:09:50.2 |
HIP 54869 |
13.54 |
| 2026-06-14 12:00 |
11:12:26.85 |
+62:09:07.9 |
HIP 54869 |
13.81 |
| 2026-06-15 00:00 |
11:12:28.09 |
+62:08:25.6 |
HIP 54869 |
14.10 |
| 2026-06-15 12:00 |
11:12:29.38 |
+62:07:43.3 |
HIP 54869 |
14.42 |
| 2026-06-16 00:00 |
11:12:30.72 |
+62:07:00.9 |
HIP 54869 |
14.77 |
| 2026-06-16 12:00 |
11:12:32.11 |
+62:06:18.5 |
HIP 54869 |
15.14 |
| 2026-06-17 00:00 |
11:12:33.56 |
+62:05:36.1 |
HIP 54869 |
15.53 |
| 2026-06-17 12:00 |
11:12:35.06 |
+62:04:53.7 |
HIP 54869 |
15.94 |
| 2026-06-18 00:00 |
11:12:36.61 |
+62:04:11.2 |
HIP 54869 |
16.37 |
| 2026-06-18 12:00 |
11:12:38.21 |
+62:03:28.8 |
HIP 54869 |
16.81 |
| 2026-06-19 00:00 |
11:12:39.86 |
+62:02:46.3 |
HIP 54869 |
17.27 |
| 2026-06-19 12:00 |
11:12:41.56 |
+62:02:03.8 |
HIP 54869 |
17.75 |
| 2026-06-20 00:00 |
11:12:43.31 |
+62:01:21.3 |
HIP 54869 |
18.24 |
| 2026-06-20 12:00 |
11:12:45.11 |
+62:00:38.8 |
HIP 54869 |
18.74 |
| 2026-06-21 00:00 |
11:12:46.96 |
+61:59:56.3 |
HIP 54869 |
19.26 |
| 2026-06-21 12:00 |
11:12:48.86 |
+61:59:13.8 |
HIP 54869 |
19.79 |
| 2026-06-22 00:00 |
11:12:50.81 |
+61:58:31.3 |
HIP 54869 |
20.33 |