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
$$
M_a = (9.839 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
9.839 |
| n |
2.000 |
| gf |
0.989 |
| gb |
-0.939 |
| k |
1.000 |
| δ90 |
9.785 |
| 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 |
11:20:07.72 |
+63:23:27.1 |
HIP 55242 |
11.87 |
| 2026-03-26 12:00 |
11:20:01.67 |
+63:23:24.0 |
HIP 55242 |
11.40 |
| 2026-03-27 00:00 |
11:19:55.64 |
+63:23:20.4 |
HIP 55242 |
10.97 |
| 2026-03-27 12:00 |
11:19:49.63 |
+63:23:16.5 |
HIP 55242 |
10.57 |
| 2026-03-28 00:00 |
11:19:43.64 |
+63:23:12.1 |
HIP 55242 |
10.20 |
| 2026-03-28 12:00 |
11:19:37.68 |
+63:23:07.4 |
HIP 55242 |
9.87 |
| 2026-03-29 00:00 |
11:19:31.73 |
+63:23:02.3 |
HIP 55242 |
9.59 |
| 2026-03-29 12:00 |
11:19:25.81 |
+63:22:56.7 |
HIP 55242 |
9.35 |
| 2026-03-30 00:00 |
11:19:19.91 |
+63:22:50.8 |
HIP 55242 |
9.16 |
| 2026-03-30 12:00 |
11:19:14.03 |
+63:22:44.5 |
HIP 55242 |
9.02 |
| 2026-03-31 00:00 |
11:19:08.17 |
+63:22:37.8 |
HIP 55242 |
8.94 |
| 2026-03-31 12:00 |
11:19:02.34 |
+63:22:30.8 |
HIP 55242 |
8.91 |
| 2026-04-01 00:00 |
11:18:56.54 |
+63:22:23.3 |
HIP 55242 |
8.94 |
| 2026-04-01 12:00 |
11:18:50.76 |
+63:22:15.4 |
HIP 55242 |
9.02 |
| 2026-04-02 00:00 |
11:18:45.00 |
+63:22:07.2 |
HIP 55242 |
9.16 |
| 2026-04-02 12:00 |
11:18:39.27 |
+63:21:58.6 |
HIP 55242 |
9.35 |
| 2026-04-03 00:00 |
11:18:33.57 |
+63:21:49.6 |
HIP 55242 |
9.58 |
| 2026-04-03 12:00 |
11:18:27.89 |
+63:21:40.2 |
HIP 55242 |
9.86 |
| 2026-04-04 00:00 |
11:18:22.25 |
+63:21:30.5 |
HIP 55242 |
10.18 |
| 2026-04-04 12:00 |
11:18:16.63 |
+63:21:20.3 |
HIP 55111 |
10.14 |
| 2026-04-05 00:00 |
11:18:11.03 |
+63:21:09.8 |
HIP 55111 |
9.53 |
| 2026-04-05 12:00 |
11:18:05.47 |
+63:20:58.9 |
HIP 55111 |
8.92 |
| 2026-04-06 00:00 |
11:17:59.94 |
+63:20:47.6 |
HIP 55111 |
8.31 |
| 2026-04-06 12:00 |
11:17:54.43 |
+63:20:36.0 |
HIP 55111 |
7.72 |
| 2026-04-07 00:00 |
11:17:48.96 |
+63:20:24.0 |
HIP 55111 |
7.13 |
| 2026-04-07 12:00 |
11:17:43.52 |
+63:20:11.6 |
HIP 55111 |
6.54 |
| 2026-04-08 00:00 |
11:17:38.11 |
+63:19:58.8 |
HIP 55111 |
5.97 |
| 2026-04-08 12:00 |
11:17:32.73 |
+63:19:45.7 |
HIP 55111 |
5.41 |
| 2026-04-09 00:00 |
11:17:27.38 |
+63:19:32.2 |
HIP 55111 |
4.87 |
| 2026-04-09 12:00 |
11:17:22.06 |
+63:19:18.3 |
HIP 55111 |
4.36 |
| 2026-04-10 00:00 |
11:17:16.78 |
+63:19:04.1 |
HIP 55111 |
3.88 |
| 2026-04-10 12:00 |
11:17:11.54 |
+63:18:49.5 |
HIP 55111 |
3.44 |
| 2026-04-11 00:00 |
11:17:06.32 |
+63:18:34.5 |
HIP 55111 |
3.07 |
| 2026-04-11 12:00 |
11:17:01.14 |
+63:18:19.2 |
HIP 55111 |
2.79 |
| 2026-04-12 00:00 |
11:16:56.00 |
+63:18:03.5 |
HIP 55111 |
2.63 |
| 2026-04-12 12:00 |
11:16:50.89 |
+63:17:47.5 |
HIP 55111 |
2.61 |
| 2026-04-13 00:00 |
11:16:45.82 |
+63:17:31.1 |
HIP 55111 |
2.74 |
| 2026-04-13 12:00 |
11:16:40.78 |
+63:17:14.3 |
HIP 55111 |
2.99 |
| 2026-04-14 00:00 |
11:16:35.78 |
+63:16:57.2 |
HIP 55111 |
3.33 |
| 2026-04-14 12:00 |
11:16:30.82 |
+63:16:39.7 |
HIP 55111 |
3.75 |
| 2026-04-15 00:00 |
11:16:25.90 |
+63:16:21.9 |
HIP 55111 |
4.21 |
| 2026-04-15 12:00 |
11:16:21.01 |
+63:16:03.8 |
HIP 55111 |
4.71 |
| 2026-04-16 00:00 |
11:16:16.16 |
+63:15:45.3 |
HIP 55111 |
5.23 |