メタデータ
| 項目 |
値 |
| Designation |
C/1986 N1 (Churyumov-Solodovnikov) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1986-05-06T10:49:52.250880Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:33Z |
| Obs used |
86 |
| NEO |
- |
| M1 |
8.300 |
| K1 |
10.000 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1987-01-14.0000000 |
| e |
0.99920711 |
| q (au) |
2.642130 |
| a (au) |
3332.287983 |
| i (deg) |
114.918049 |
| Ω (om, deg) |
134.617578 |
| ω (w, deg) |
157.743449 |
| M (ma, deg) |
0.001294 |
等級
散乱 + 全体線形
$$
M_a = (9.540 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
9.540 |
| n |
2.000 |
| gf |
0.835 |
| gb |
-0.865 |
| k |
0.999 |
| δ90 |
5.854 |
| 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 |
09:30:33.83 |
-28:39:05.7 |
HIP 46646 |
7.03 |
| 2026-05-12 12:00 |
09:30:33.83 |
-28:38:45.5 |
HIP 46593 |
7.06 |
| 2026-05-13 00:00 |
09:30:33.85 |
-28:38:25.3 |
HIP 46593 |
6.92 |
| 2026-05-13 12:00 |
09:30:33.89 |
-28:38:05.2 |
HIP 46593 |
6.80 |
| 2026-05-14 00:00 |
09:30:33.94 |
-28:37:45.2 |
HIP 46593 |
6.70 |
| 2026-05-14 12:00 |
09:30:34.01 |
-28:37:25.3 |
HIP 46593 |
6.61 |
| 2026-05-15 00:00 |
09:30:34.10 |
-28:37:05.4 |
HIP 46593 |
6.55 |
| 2026-05-15 12:00 |
09:30:34.20 |
-28:36:45.6 |
HIP 46593 |
6.51 |
| 2026-05-16 00:00 |
09:30:34.32 |
-28:36:25.8 |
HIP 46593 |
6.48 |
| 2026-05-16 12:00 |
09:30:34.46 |
-28:36:06.1 |
HIP 46593 |
6.48 |
| 2026-05-17 00:00 |
09:30:34.61 |
-28:35:46.5 |
HIP 46593 |
6.50 |
| 2026-05-17 12:00 |
09:30:34.79 |
-28:35:27.0 |
HIP 46593 |
6.54 |
| 2026-05-18 00:00 |
09:30:34.98 |
-28:35:07.6 |
HIP 46593 |
6.60 |
| 2026-05-18 12:00 |
09:30:35.18 |
-28:34:48.2 |
HIP 46593 |
6.67 |
| 2026-05-19 00:00 |
09:30:35.41 |
-28:34:28.9 |
HIP 46593 |
6.77 |
| 2026-05-19 12:00 |
09:30:35.65 |
-28:34:09.7 |
HIP 46593 |
6.88 |
| 2026-05-20 00:00 |
09:30:35.90 |
-28:33:50.6 |
HIP 46593 |
7.01 |
| 2026-05-20 12:00 |
09:30:36.18 |
-28:33:31.5 |
HIP 46593 |
7.16 |
| 2026-05-21 00:00 |
09:30:36.47 |
-28:33:12.6 |
HIP 46593 |
7.31 |
| 2026-05-21 12:00 |
09:30:36.78 |
-28:32:53.7 |
HIP 46593 |
7.49 |
| 2026-05-22 00:00 |
09:30:37.10 |
-28:32:34.9 |
HIP 46593 |
7.67 |
| 2026-05-22 12:00 |
09:30:37.44 |
-28:32:16.2 |
HIP 46593 |
7.87 |
| 2026-05-23 00:00 |
09:30:37.80 |
-28:31:57.6 |
HIP 46593 |
8.08 |
| 2026-05-23 12:00 |
09:30:38.17 |
-28:31:39.1 |
HIP 46593 |
8.29 |
| 2026-05-24 00:00 |
09:30:38.56 |
-28:31:20.7 |
HIP 46593 |
8.52 |
| 2026-05-24 12:00 |
09:30:38.97 |
-28:31:02.3 |
HIP 46593 |
8.75 |
| 2026-05-25 00:00 |
09:30:39.39 |
-28:30:44.1 |
HIP 46593 |
8.99 |
| 2026-05-25 12:00 |
09:30:39.83 |
-28:30:25.9 |
HIP 46593 |
9.24 |
| 2026-05-26 00:00 |
09:30:40.29 |
-28:30:07.9 |
HIP 46593 |
9.49 |
| 2026-05-26 12:00 |
09:30:40.76 |
-28:29:49.9 |
HIP 46593 |
9.75 |
| 2026-05-27 00:00 |
09:30:41.25 |
-28:29:32.1 |
HIP 46593 |
10.02 |
| 2026-05-27 12:00 |
09:30:41.76 |
-28:29:14.3 |
HIP 46593 |
10.29 |
| 2026-05-28 00:00 |
09:30:42.28 |
-28:28:56.7 |
HIP 46593 |
10.56 |
| 2026-05-28 12:00 |
09:30:42.81 |
-28:28:39.1 |
HIP 46593 |
10.84 |
| 2026-05-29 00:00 |
09:30:43.37 |
-28:28:21.7 |
HIP 46593 |
11.12 |
| 2026-05-29 12:00 |
09:30:43.94 |
-28:28:04.3 |
HIP 46593 |
11.40 |
| 2026-05-30 00:00 |
09:30:44.52 |
-28:27:47.1 |
HIP 46593 |
11.69 |
| 2026-05-30 12:00 |
09:30:45.12 |
-28:27:30.0 |
HIP 46593 |
11.98 |
| 2026-05-31 00:00 |
09:30:45.74 |
-28:27:12.9 |
HIP 46593 |
12.27 |
| 2026-05-31 12:00 |
09:30:46.37 |
-28:26:56.0 |
HIP 46593 |
12.57 |
| 2026-06-01 00:00 |
09:30:47.02 |
-28:26:39.2 |
HIP 46593 |
12.87 |
| 2026-06-01 12:00 |
09:30:47.68 |
-28:26:22.5 |
HIP 46593 |
13.17 |
| 2026-06-02 00:00 |
09:30:48.36 |
-28:26:05.9 |
HIP 46593 |
13.47 |