メタデータ
| 項目 |
値 |
| Designation |
C/2005 E2 (McNaught) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2006-02-23T11:21:44.352000Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:47Z |
| Obs used |
1317 |
| NEO |
- |
| M1 |
9.200 |
| K1 |
7.250 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2006-05-09.0000000 |
| e |
1.00013891 |
| q (au) |
1.519579 |
| a (au) |
-10939.545227 |
| i (deg) |
16.988338 |
| Ω (om, deg) |
347.847398 |
| ω (w, deg) |
39.966443 |
| M (ma, deg) |
0.000064 |
等級
散乱 + 全体線形
$$
M_a = (8.500 + 2.795\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
8.500 |
| n |
2.795 |
| gf |
1.000 |
| gb |
-0.592 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 2005-03-12 |
2006-02-23 |
-0.0274 |
-0.832 |
| 2006-02-23 |
2006-05-02 |
-34.1608 |
+5.629 |
| 2006-05-02 |
2006-10-31 |
+10.7803 |
-5.797 |
| 2006-10-31 |
2007-03-17 |
-2.8233 |
+2.023 |
| 2007-03-17 |
2008-03-02 |
+3.2327 |
-2.351 |
log10 r = log10(太陽距離/AU)、Δ = 地球距離(AU)
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
12:05:14.68 |
-06:12:15.9 |
HIP 58981 |
22.10 |
| 2026-06-01 12:00 |
12:05:13.82 |
-06:12:07.0 |
HIP 58981 |
22.01 |
| 2026-06-02 00:00 |
12:05:12.97 |
-06:11:58.2 |
HIP 58981 |
21.91 |
| 2026-06-02 12:00 |
12:05:12.15 |
-06:11:49.5 |
HIP 58981 |
21.83 |
| 2026-06-03 00:00 |
12:05:11.35 |
-06:11:40.9 |
HIP 58981 |
21.74 |
| 2026-06-03 12:00 |
12:05:10.57 |
-06:11:32.5 |
HIP 58981 |
21.66 |
| 2026-06-04 00:00 |
12:05:09.81 |
-06:11:24.2 |
HIP 58981 |
21.58 |
| 2026-06-04 12:00 |
12:05:09.07 |
-06:11:16.0 |
HIP 58981 |
21.51 |
| 2026-06-05 00:00 |
12:05:08.36 |
-06:11:07.9 |
HIP 58981 |
21.43 |
| 2026-06-05 12:00 |
12:05:07.67 |
-06:11:00.0 |
HIP 58981 |
21.36 |
| 2026-06-06 00:00 |
12:05:06.99 |
-06:10:52.2 |
HIP 58981 |
21.29 |
| 2026-06-06 12:00 |
12:05:06.35 |
-06:10:44.5 |
HIP 58981 |
21.23 |
| 2026-06-07 00:00 |
12:05:05.72 |
-06:10:37.0 |
HIP 58981 |
21.16 |
| 2026-06-07 12:00 |
12:05:05.11 |
-06:10:29.6 |
HIP 58981 |
21.10 |
| 2026-06-08 00:00 |
12:05:04.53 |
-06:10:22.4 |
HIP 58981 |
21.04 |
| 2026-06-08 12:00 |
12:05:03.97 |
-06:10:15.3 |
HIP 58981 |
20.98 |
| 2026-06-09 00:00 |
12:05:03.43 |
-06:10:08.3 |
HIP 58981 |
20.92 |
| 2026-06-09 12:00 |
12:05:02.91 |
-06:10:01.4 |
HIP 58981 |
20.86 |
| 2026-06-10 00:00 |
12:05:02.42 |
-06:09:54.7 |
HIP 58981 |
20.81 |
| 2026-06-10 12:00 |
12:05:01.94 |
-06:09:48.1 |
HIP 58981 |
20.75 |
| 2026-06-11 00:00 |
12:05:01.49 |
-06:09:41.7 |
HIP 58981 |
20.70 |
| 2026-06-11 12:00 |
12:05:01.07 |
-06:09:35.4 |
HIP 58981 |
20.64 |
| 2026-06-12 00:00 |
12:05:00.66 |
-06:09:29.2 |
HIP 58981 |
20.59 |
| 2026-06-12 12:00 |
12:05:00.28 |
-06:09:23.2 |
HIP 58981 |
20.54 |
| 2026-06-13 00:00 |
12:04:59.91 |
-06:09:17.3 |
HIP 58981 |
20.49 |
| 2026-06-13 12:00 |
12:04:59.58 |
-06:09:11.5 |
HIP 58981 |
20.44 |
| 2026-06-14 00:00 |
12:04:59.26 |
-06:09:05.9 |
HIP 58981 |
20.39 |
| 2026-06-14 12:00 |
12:04:58.97 |
-06:09:00.5 |
HIP 58981 |
20.34 |
| 2026-06-15 00:00 |
12:04:58.69 |
-06:08:55.1 |
HIP 58981 |
20.29 |
| 2026-06-15 12:00 |
12:04:58.45 |
-06:08:49.9 |
HIP 58981 |
20.24 |
| 2026-06-16 00:00 |
12:04:58.22 |
-06:08:44.9 |
HIP 58981 |
20.19 |
| 2026-06-16 12:00 |
12:04:58.02 |
-06:08:40.0 |
HIP 58981 |
20.14 |
| 2026-06-17 00:00 |
12:04:57.83 |
-06:08:35.3 |
HIP 58981 |
20.09 |
| 2026-06-17 12:00 |
12:04:57.68 |
-06:08:30.6 |
HIP 58981 |
20.04 |
| 2026-06-18 00:00 |
12:04:57.54 |
-06:08:26.2 |
HIP 58981 |
19.99 |
| 2026-06-18 12:00 |
12:04:57.42 |
-06:08:21.8 |
HIP 58981 |
19.94 |
| 2026-06-19 00:00 |
12:04:57.33 |
-06:08:17.7 |
HIP 58981 |
19.89 |
| 2026-06-19 12:00 |
12:04:57.26 |
-06:08:13.6 |
HIP 58981 |
19.84 |
| 2026-06-20 00:00 |
12:04:57.22 |
-06:08:09.7 |
HIP 58981 |
19.79 |
| 2026-06-20 12:00 |
12:04:57.19 |
-06:08:06.0 |
HIP 58981 |
19.74 |
| 2026-06-21 00:00 |
12:04:57.19 |
-06:08:02.4 |
HIP 58981 |
19.68 |
| 2026-06-21 12:00 |
12:04:57.21 |
-06:07:58.9 |
HIP 58981 |
19.63 |
| 2026-06-22 00:00 |
12:04:57.25 |
-06:07:55.6 |
HIP 58981 |
19.58 |