メタデータ
| 項目 |
値 |
| Designation |
C/2010 J2 (McNaught) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2010-06-03T20:45:36.622080Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:44Z |
| Obs used |
543 |
| NEO |
- |
| M1 |
10.100 |
| K1 |
9.500 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2010-08-16.0000000 |
| e |
0.99945919 |
| q (au) |
3.386996 |
| a (au) |
6262.872230 |
| i (deg) |
125.851540 |
| Ω (om, deg) |
311.794846 |
| ω (w, deg) |
4.616553 |
| M (ma, deg) |
0.000145 |
等級
散乱 + 全体線形
$$
M_a = (11.081 + 2.443\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
11.081 |
| n |
2.443 |
| gf |
0.992 |
| gb |
-1.000 |
| k |
1.000 |
| δ90 |
9.980 |
| 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 |
11:00:21.70 |
+35:44:27.0 |
HIP 53726 |
23.35 |
| 2026-03-26 12:00 |
11:00:17.37 |
+35:44:32.9 |
HIP 53726 |
22.90 |
| 2026-03-27 00:00 |
11:00:13.05 |
+35:44:38.5 |
HIP 53726 |
22.49 |
| 2026-03-27 12:00 |
11:00:08.75 |
+35:44:43.8 |
HIP 53726 |
22.10 |
| 2026-03-28 00:00 |
11:00:04.47 |
+35:44:48.8 |
HIP 53726 |
21.75 |
| 2026-03-28 12:00 |
11:00:00.20 |
+35:44:53.5 |
HIP 53726 |
21.44 |
| 2026-03-29 00:00 |
10:59:55.96 |
+35:44:58.0 |
HIP 53726 |
21.16 |
| 2026-03-29 12:00 |
10:59:51.72 |
+35:45:02.1 |
HIP 53726 |
20.91 |
| 2026-03-30 00:00 |
10:59:47.51 |
+35:45:05.9 |
HIP 53726 |
20.71 |
| 2026-03-30 12:00 |
10:59:43.31 |
+35:45:09.5 |
HIP 53726 |
20.55 |
| 2026-03-31 00:00 |
10:59:39.13 |
+35:45:12.7 |
HIP 53726 |
20.42 |
| 2026-03-31 12:00 |
10:59:34.96 |
+35:45:15.7 |
HIP 53726 |
20.34 |
| 2026-04-01 00:00 |
10:59:30.82 |
+35:45:18.4 |
HIP 53726 |
20.29 |
| 2026-04-01 12:00 |
10:59:26.69 |
+35:45:20.7 |
HIP 53726 |
20.28 |
| 2026-04-02 00:00 |
10:59:22.58 |
+35:45:22.8 |
HIP 53726 |
20.32 |
| 2026-04-02 12:00 |
10:59:18.50 |
+35:45:24.6 |
HIP 53726 |
20.39 |
| 2026-04-03 00:00 |
10:59:14.43 |
+35:45:26.1 |
HIP 53726 |
20.50 |
| 2026-04-03 12:00 |
10:59:10.38 |
+35:45:27.3 |
HIP 53726 |
20.64 |
| 2026-04-04 00:00 |
10:59:06.35 |
+35:45:28.2 |
HIP 53563 |
20.65 |
| 2026-04-04 12:00 |
10:59:02.34 |
+35:45:28.8 |
HIP 53563 |
19.86 |
| 2026-04-05 00:00 |
10:58:58.35 |
+35:45:29.2 |
HIP 53563 |
19.07 |
| 2026-04-05 12:00 |
10:58:54.38 |
+35:45:29.2 |
HIP 53563 |
18.30 |
| 2026-04-06 00:00 |
10:58:50.43 |
+35:45:29.0 |
HIP 53563 |
17.53 |
| 2026-04-06 12:00 |
10:58:46.50 |
+35:45:28.4 |
HIP 53563 |
16.77 |
| 2026-04-07 00:00 |
10:58:42.60 |
+35:45:27.6 |
HIP 53563 |
16.01 |
| 2026-04-07 12:00 |
10:58:38.72 |
+35:45:26.4 |
HIP 53563 |
15.27 |
| 2026-04-08 00:00 |
10:58:34.86 |
+35:45:25.0 |
HIP 53563 |
14.54 |
| 2026-04-08 12:00 |
10:58:31.02 |
+35:45:23.3 |
HIP 53563 |
13.82 |
| 2026-04-09 00:00 |
10:58:27.20 |
+35:45:21.3 |
HIP 53563 |
13.11 |
| 2026-04-09 12:00 |
10:58:23.41 |
+35:45:19.0 |
HIP 53563 |
12.42 |
| 2026-04-10 00:00 |
10:58:19.64 |
+35:45:16.5 |
HIP 53563 |
11.74 |
| 2026-04-10 12:00 |
10:58:15.89 |
+35:45:13.6 |
HIP 53563 |
11.09 |
| 2026-04-11 00:00 |
10:58:12.16 |
+35:45:10.4 |
HIP 53563 |
10.45 |
| 2026-04-11 12:00 |
10:58:08.47 |
+35:45:07.0 |
HIP 53563 |
9.83 |
| 2026-04-12 00:00 |
10:58:04.79 |
+35:45:03.3 |
HIP 53563 |
9.25 |
| 2026-04-12 12:00 |
10:58:01.14 |
+35:44:59.3 |
HIP 53563 |
8.69 |
| 2026-04-13 00:00 |
10:57:57.51 |
+35:44:55.0 |
HIP 53563 |
8.17 |
| 2026-04-13 12:00 |
10:57:53.91 |
+35:44:50.4 |
HIP 53563 |
7.69 |
| 2026-04-14 00:00 |
10:57:50.33 |
+35:44:45.5 |
HIP 53563 |
7.27 |
| 2026-04-14 12:00 |
10:57:46.78 |
+35:44:40.3 |
HIP 53563 |
6.90 |
| 2026-04-15 00:00 |
10:57:43.26 |
+35:44:34.9 |
HIP 53563 |
6.60 |
| 2026-04-15 12:00 |
10:57:39.76 |
+35:44:29.2 |
HIP 53563 |
6.37 |
| 2026-04-16 00:00 |
10:57:36.29 |
+35:44:23.2 |
HIP 53563 |
6.22 |