メタデータ
| 項目 |
値 |
| Designation |
C/2013 H1 (La Sagra) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2013-05-19T16:02:02.639040Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:34Z |
| Obs used |
270 |
| NEO |
- |
| M1 |
7.200 |
| K1 |
22.750 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2013-05-18.0000000 |
| e |
0.98542562 |
| q (au) |
2.646966 |
| a (au) |
181.617687 |
| i (deg) |
27.089519 |
| Ω (om, deg) |
84.969862 |
| ω (w, deg) |
136.581161 |
| M (ma, deg) |
359.999328 |
等級
散乱 + 全体線形
$$
M_a = (11.300 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
11.300 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| k |
0.800 |
| 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) |
| 2026-06-01 00:00 |
01:21:04.30 |
-19:37:04.0 |
HIP 6409 |
17.82 |
| 2026-06-01 12:00 |
01:21:07.26 |
-19:37:09.6 |
HIP 6409 |
17.14 |
| 2026-06-02 00:00 |
01:21:10.20 |
-19:37:15.5 |
HIP 6409 |
16.47 |
| 2026-06-02 12:00 |
01:21:13.11 |
-19:37:21.7 |
HIP 6409 |
15.81 |
| 2026-06-03 00:00 |
01:21:16.00 |
-19:37:28.2 |
HIP 6409 |
15.16 |
| 2026-06-03 12:00 |
01:21:18.86 |
-19:37:35.0 |
HIP 6409 |
14.52 |
| 2026-06-04 00:00 |
01:21:21.70 |
-19:37:42.0 |
HIP 6409 |
13.89 |
| 2026-06-04 12:00 |
01:21:24.51 |
-19:37:49.4 |
HIP 6409 |
13.27 |
| 2026-06-05 00:00 |
01:21:27.29 |
-19:37:57.0 |
HIP 6409 |
12.67 |
| 2026-06-05 12:00 |
01:21:30.05 |
-19:38:04.9 |
HIP 6409 |
12.07 |
| 2026-06-06 00:00 |
01:21:32.79 |
-19:38:13.1 |
HIP 6409 |
11.50 |
| 2026-06-06 12:00 |
01:21:35.50 |
-19:38:21.6 |
HIP 6409 |
10.94 |
| 2026-06-07 00:00 |
01:21:38.18 |
-19:38:30.3 |
HIP 6409 |
10.40 |
| 2026-06-07 12:00 |
01:21:40.84 |
-19:38:39.4 |
HIP 6409 |
9.87 |
| 2026-06-08 00:00 |
01:21:43.47 |
-19:38:48.7 |
HIP 6409 |
9.38 |
| 2026-06-08 12:00 |
01:21:46.07 |
-19:38:58.3 |
HIP 6409 |
8.90 |
| 2026-06-09 00:00 |
01:21:48.65 |
-19:39:08.2 |
HIP 6409 |
8.46 |
| 2026-06-09 12:00 |
01:21:51.20 |
-19:39:18.3 |
HIP 6409 |
8.05 |
| 2026-06-10 00:00 |
01:21:53.72 |
-19:39:28.8 |
HIP 6409 |
7.68 |
| 2026-06-10 12:00 |
01:21:56.21 |
-19:39:39.5 |
HIP 6409 |
7.34 |
| 2026-06-11 00:00 |
01:21:58.68 |
-19:39:50.5 |
HIP 6409 |
7.06 |
| 2026-06-11 12:00 |
01:22:01.12 |
-19:40:01.8 |
HIP 6409 |
6.82 |
| 2026-06-12 00:00 |
01:22:03.53 |
-19:40:13.4 |
HIP 6409 |
6.64 |
| 2026-06-12 12:00 |
01:22:05.91 |
-19:40:25.2 |
HIP 6409 |
6.51 |
| 2026-06-13 00:00 |
01:22:08.27 |
-19:40:37.3 |
HIP 6409 |
6.45 |
| 2026-06-13 12:00 |
01:22:10.59 |
-19:40:49.7 |
HIP 6409 |
6.44 |
| 2026-06-14 00:00 |
01:22:12.89 |
-19:41:02.4 |
HIP 6409 |
6.50 |
| 2026-06-14 12:00 |
01:22:15.16 |
-19:41:15.3 |
HIP 6409 |
6.61 |
| 2026-06-15 00:00 |
01:22:17.40 |
-19:41:28.5 |
HIP 6409 |
6.77 |
| 2026-06-15 12:00 |
01:22:19.61 |
-19:41:42.0 |
HIP 6409 |
6.98 |
| 2026-06-16 00:00 |
01:22:21.79 |
-19:41:55.8 |
HIP 6409 |
7.23 |
| 2026-06-16 12:00 |
01:22:23.94 |
-19:42:09.8 |
HIP 6409 |
7.52 |
| 2026-06-17 00:00 |
01:22:26.07 |
-19:42:24.1 |
HIP 6409 |
7.84 |
| 2026-06-17 12:00 |
01:22:28.16 |
-19:42:38.7 |
HIP 6409 |
8.19 |
| 2026-06-18 00:00 |
01:22:30.22 |
-19:42:53.5 |
HIP 6409 |
8.57 |
| 2026-06-18 12:00 |
01:22:32.25 |
-19:43:08.6 |
HIP 6409 |
8.96 |
| 2026-06-19 00:00 |
01:22:34.25 |
-19:43:24.0 |
HIP 6409 |
9.37 |
| 2026-06-19 12:00 |
01:22:36.23 |
-19:43:39.6 |
HIP 6409 |
9.79 |
| 2026-06-20 00:00 |
01:22:38.17 |
-19:43:55.5 |
HIP 6409 |
10.22 |
| 2026-06-20 12:00 |
01:22:40.08 |
-19:44:11.6 |
HIP 6409 |
10.66 |
| 2026-06-21 00:00 |
01:22:41.96 |
-19:44:28.0 |
HIP 6409 |
11.11 |
| 2026-06-21 12:00 |
01:22:43.81 |
-19:44:44.7 |
HIP 6409 |
11.57 |
| 2026-06-22 00:00 |
01:22:45.63 |
-19:45:01.6 |
HIP 6409 |
12.03 |