メタデータ
| 項目 |
値 |
| Designation |
C/2006 E1 (McNaught) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2007-01-06T09:04:34.311360Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:56Z |
| Obs used |
143 |
| NEO |
- |
| M1 |
10.500 |
| 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) |
2006-09-30.0000000 |
| e |
1.00112179 |
| q (au) |
6.040609 |
| a (au) |
-5384.803014 |
| i (deg) |
83.194197 |
| Ω (om, deg) |
95.035389 |
| ω (w, deg) |
232.766977 |
| M (ma, deg) |
-0.000245 |
等級
散乱 + 全体線形
$$
M_a = (1.757 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
1.757 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
1.000 |
| 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 |
06:19:51.95 |
+27:16:04.3 |
HIP 30101 |
7.56 |
| 2026-05-12 12:00 |
06:19:54.63 |
+27:16:05.5 |
HIP 30101 |
7.34 |
| 2026-05-13 00:00 |
06:19:57.33 |
+27:16:06.8 |
HIP 30101 |
7.17 |
| 2026-05-13 12:00 |
06:20:00.05 |
+27:16:08.1 |
HIP 30101 |
7.04 |
| 2026-05-14 00:00 |
06:20:02.79 |
+27:16:09.4 |
HIP 30101 |
6.96 |
| 2026-05-14 12:00 |
06:20:05.55 |
+27:16:10.6 |
HIP 30101 |
6.93 |
| 2026-05-15 00:00 |
06:20:08.33 |
+27:16:11.9 |
HIP 30101 |
6.95 |
| 2026-05-15 12:00 |
06:20:11.13 |
+27:16:13.2 |
HIP 30101 |
7.04 |
| 2026-05-16 00:00 |
06:20:13.94 |
+27:16:14.5 |
HIP 30101 |
7.17 |
| 2026-05-16 12:00 |
06:20:16.78 |
+27:16:15.8 |
HIP 30101 |
7.36 |
| 2026-05-17 00:00 |
06:20:19.63 |
+27:16:17.2 |
HIP 30101 |
7.60 |
| 2026-05-17 12:00 |
06:20:22.51 |
+27:16:18.5 |
HIP 30101 |
7.88 |
| 2026-05-18 00:00 |
06:20:25.40 |
+27:16:19.8 |
HIP 30101 |
8.21 |
| 2026-05-18 12:00 |
06:20:28.31 |
+27:16:21.2 |
HIP 30101 |
8.57 |
| 2026-05-19 00:00 |
06:20:31.23 |
+27:16:22.5 |
HIP 30101 |
8.97 |
| 2026-05-19 12:00 |
06:20:34.18 |
+27:16:23.9 |
HIP 30101 |
9.40 |
| 2026-05-20 00:00 |
06:20:37.14 |
+27:16:25.3 |
HIP 30101 |
9.86 |
| 2026-05-20 12:00 |
06:20:40.12 |
+27:16:26.7 |
HIP 30101 |
10.34 |
| 2026-05-21 00:00 |
06:20:43.11 |
+27:16:28.1 |
HIP 30101 |
10.84 |
| 2026-05-21 12:00 |
06:20:46.12 |
+27:16:29.5 |
HIP 30101 |
11.36 |
| 2026-05-22 00:00 |
06:20:49.15 |
+27:16:30.9 |
HIP 30101 |
11.90 |
| 2026-05-22 12:00 |
06:20:52.19 |
+27:16:32.3 |
HIP 30101 |
12.46 |
| 2026-05-23 00:00 |
06:20:55.25 |
+27:16:33.7 |
HIP 30101 |
13.03 |
| 2026-05-23 12:00 |
06:20:58.33 |
+27:16:35.2 |
HIP 30101 |
13.61 |
| 2026-05-24 00:00 |
06:21:01.42 |
+27:16:36.6 |
HIP 30101 |
14.21 |
| 2026-05-24 12:00 |
06:21:04.52 |
+27:16:38.1 |
HIP 30101 |
14.82 |
| 2026-05-25 00:00 |
06:21:07.64 |
+27:16:39.6 |
HIP 30101 |
15.43 |
| 2026-05-25 12:00 |
06:21:10.78 |
+27:16:41.1 |
HIP 30101 |
16.06 |
| 2026-05-26 00:00 |
06:21:13.93 |
+27:16:42.6 |
HIP 30101 |
16.69 |
| 2026-05-26 12:00 |
06:21:17.09 |
+27:16:44.1 |
HIP 30101 |
17.33 |
| 2026-05-27 00:00 |
06:21:20.27 |
+27:16:45.6 |
HIP 30101 |
17.98 |
| 2026-05-27 12:00 |
06:21:23.46 |
+27:16:47.2 |
HIP 30101 |
18.64 |
| 2026-05-28 00:00 |
06:21:26.67 |
+27:16:48.7 |
HIP 30101 |
19.30 |
| 2026-05-28 12:00 |
06:21:29.89 |
+27:16:50.3 |
HIP 30101 |
19.97 |
| 2026-05-29 00:00 |
06:21:33.12 |
+27:16:51.9 |
HIP 30101 |
20.65 |
| 2026-05-29 12:00 |
06:21:36.36 |
+27:16:53.4 |
HIP 30349 |
21.03 |
| 2026-05-30 00:00 |
06:21:39.62 |
+27:16:55.0 |
HIP 30349 |
20.38 |
| 2026-05-30 12:00 |
06:21:42.89 |
+27:16:56.7 |
HIP 30349 |
19.73 |
| 2026-05-31 00:00 |
06:21:46.18 |
+27:16:58.3 |
HIP 30349 |
19.09 |
| 2026-05-31 12:00 |
06:21:49.47 |
+27:17:00.0 |
HIP 30349 |
18.44 |
| 2026-06-01 00:00 |
06:21:52.78 |
+27:17:01.6 |
HIP 30349 |
17.81 |
| 2026-06-01 12:00 |
06:21:56.10 |
+27:17:03.3 |
HIP 30349 |
17.18 |
| 2026-06-02 00:00 |
06:21:59.43 |
+27:17:04.9 |
HIP 30349 |
16.55 |