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) |
| 2026-07-29 00:00 |
11:17:17.09 |
+61:09:10.8 |
HIP 54964 |
27.18 |
| 2026-07-29 12:00 |
11:17:22.09 |
+61:08:35.6 |
HIP 54964 |
27.01 |
| 2026-07-30 00:00 |
11:17:27.13 |
+61:08:00.5 |
HIP 54964 |
26.88 |
| 2026-07-30 12:00 |
11:17:32.20 |
+61:07:25.7 |
HIP 54964 |
26.77 |
| 2026-07-31 00:00 |
11:17:37.30 |
+61:06:51.0 |
HIP 54964 |
26.70 |
| 2026-07-31 12:00 |
11:17:42.42 |
+61:06:16.5 |
HIP 54964 |
26.66 |
| 2026-08-01 00:00 |
11:17:47.58 |
+61:05:42.2 |
HIP 54964 |
26.65 |
| 2026-08-01 12:00 |
11:17:52.77 |
+61:05:08.1 |
HIP 54964 |
26.67 |
| 2026-08-02 00:00 |
11:17:57.98 |
+61:04:34.2 |
HIP 54964 |
26.72 |
| 2026-08-02 12:00 |
11:18:03.22 |
+61:04:00.4 |
HIP 54964 |
26.80 |
| 2026-08-03 00:00 |
11:18:08.49 |
+61:03:26.9 |
HIP 54964 |
26.92 |
| 2026-08-03 12:00 |
11:18:13.79 |
+61:02:53.6 |
HIP 54964 |
27.07 |
| 2026-08-04 00:00 |
11:18:19.11 |
+61:02:20.5 |
HIP 55215 |
26.53 |
| 2026-08-04 12:00 |
11:18:24.47 |
+61:01:47.5 |
HIP 55215 |
25.97 |
| 2026-08-05 00:00 |
11:18:29.85 |
+61:01:14.8 |
HIP 55215 |
25.42 |
| 2026-08-05 12:00 |
11:18:35.25 |
+61:00:42.3 |
HIP 55215 |
24.90 |
| 2026-08-06 00:00 |
11:18:40.68 |
+61:00:10.0 |
HIP 55215 |
24.40 |
| 2026-08-06 12:00 |
11:18:46.14 |
+60:59:37.9 |
HIP 55215 |
23.93 |
| 2026-08-07 00:00 |
11:18:51.63 |
+60:59:06.0 |
HIP 55215 |
23.48 |
| 2026-08-07 12:00 |
11:18:57.14 |
+60:58:34.4 |
HIP 55215 |
23.05 |
| 2026-08-08 00:00 |
11:19:02.67 |
+60:58:02.9 |
HIP 55215 |
22.66 |
| 2026-08-08 12:00 |
11:19:08.23 |
+60:57:31.7 |
HIP 55215 |
22.29 |
| 2026-08-09 00:00 |
11:19:13.82 |
+60:57:00.7 |
HIP 55215 |
21.96 |
| 2026-08-09 12:00 |
11:19:19.42 |
+60:56:29.9 |
HIP 55215 |
21.66 |
| 2026-08-10 00:00 |
11:19:25.06 |
+60:55:59.3 |
HIP 55215 |
21.40 |
| 2026-08-10 12:00 |
11:19:30.71 |
+60:55:29.0 |
HIP 55215 |
21.17 |
| 2026-08-11 00:00 |
11:19:36.39 |
+60:54:58.9 |
HIP 55215 |
20.98 |
| 2026-08-11 12:00 |
11:19:42.09 |
+60:54:29.1 |
HIP 55215 |
20.82 |
| 2026-08-12 00:00 |
11:19:47.82 |
+60:53:59.4 |
HIP 55215 |
20.71 |
| 2026-08-12 12:00 |
11:19:53.57 |
+60:53:30.0 |
HIP 55215 |
20.63 |
| 2026-08-13 00:00 |
11:19:59.33 |
+60:53:00.9 |
HIP 55215 |
20.60 |
| 2026-08-13 12:00 |
11:20:05.12 |
+60:52:31.9 |
HIP 55215 |
20.61 |
| 2026-08-14 00:00 |
11:20:10.93 |
+60:52:03.3 |
HIP 55215 |
20.65 |
| 2026-08-14 12:00 |
11:20:16.77 |
+60:51:34.8 |
HIP 55215 |
20.74 |
| 2026-08-15 00:00 |
11:20:22.62 |
+60:51:06.6 |
HIP 55215 |
20.87 |
| 2026-08-15 12:00 |
11:20:28.49 |
+60:50:38.7 |
HIP 55215 |
21.03 |
| 2026-08-16 00:00 |
11:20:34.38 |
+60:50:11.0 |
HIP 55215 |
21.24 |
| 2026-08-16 12:00 |
11:20:40.29 |
+60:49:43.6 |
HIP 55215 |
21.48 |
| 2026-08-17 00:00 |
11:20:46.22 |
+60:49:16.4 |
HIP 55215 |
21.75 |
| 2026-08-17 12:00 |
11:20:52.17 |
+60:48:49.4 |
HIP 55215 |
22.06 |
| 2026-08-18 00:00 |
11:20:58.14 |
+60:48:22.7 |
HIP 55215 |
22.41 |
| 2026-08-18 12:00 |
11:21:04.12 |
+60:47:56.3 |
HIP 55215 |
22.78 |
| 2026-08-19 00:00 |
11:21:10.12 |
+60:47:30.1 |
HIP 55215 |
23.19 |