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) |
| 2026-03-26 00:00 |
01:12:13.52 |
-20:06:47.8 |
HIP 5727 |
21.16 |
| 2026-03-26 12:00 |
01:12:17.75 |
-20:06:17.9 |
HIP 5727 |
20.07 |
| 2026-03-27 00:00 |
01:12:21.99 |
-20:05:48.2 |
HIP 5727 |
18.98 |
| 2026-03-27 12:00 |
01:12:26.23 |
-20:05:18.8 |
HIP 5727 |
17.89 |
| 2026-03-28 00:00 |
01:12:30.48 |
-20:04:49.5 |
HIP 5727 |
16.80 |
| 2026-03-28 12:00 |
01:12:34.74 |
-20:04:20.4 |
HIP 5727 |
15.71 |
| 2026-03-29 00:00 |
01:12:39.00 |
-20:03:51.6 |
HIP 5727 |
14.63 |
| 2026-03-29 12:00 |
01:12:43.27 |
-20:03:22.9 |
HIP 5727 |
13.55 |
| 2026-03-30 00:00 |
01:12:47.54 |
-20:02:54.4 |
HIP 5727 |
12.48 |
| 2026-03-30 12:00 |
01:12:51.82 |
-20:02:26.2 |
HIP 5727 |
11.42 |
| 2026-03-31 00:00 |
01:12:56.11 |
-20:01:58.2 |
HIP 5727 |
10.36 |
| 2026-03-31 12:00 |
01:13:00.40 |
-20:01:30.3 |
HIP 5727 |
9.31 |
| 2026-04-01 00:00 |
01:13:04.69 |
-20:01:02.7 |
HIP 5727 |
8.28 |
| 2026-04-01 12:00 |
01:13:08.99 |
-20:00:35.3 |
HIP 5727 |
7.27 |
| 2026-04-02 00:00 |
01:13:13.29 |
-20:00:08.1 |
HIP 5727 |
6.29 |
| 2026-04-02 12:00 |
01:13:17.60 |
-19:59:41.1 |
HIP 5727 |
5.36 |
| 2026-04-03 00:00 |
01:13:21.91 |
-19:59:14.4 |
HIP 5727 |
4.51 |
| 2026-04-03 12:00 |
01:13:26.22 |
-19:58:47.8 |
HIP 5727 |
3.78 |
| 2026-04-04 00:00 |
01:13:30.53 |
-19:58:21.5 |
HIP 5727 |
3.28 |
| 2026-04-04 12:00 |
01:13:34.85 |
-19:57:55.4 |
HIP 5727 |
3.10 |
| 2026-04-05 00:00 |
01:13:39.18 |
-19:57:29.5 |
HIP 5727 |
3.30 |
| 2026-04-05 12:00 |
01:13:43.50 |
-19:57:03.9 |
HIP 5727 |
3.82 |
| 2026-04-06 00:00 |
01:13:47.82 |
-19:56:38.5 |
HIP 5727 |
4.55 |
| 2026-04-06 12:00 |
01:13:52.15 |
-19:56:13.3 |
HIP 5727 |
5.40 |
| 2026-04-07 00:00 |
01:13:56.48 |
-19:55:48.3 |
HIP 5727 |
6.32 |
| 2026-04-07 12:00 |
01:14:00.81 |
-19:55:23.5 |
HIP 5727 |
7.30 |
| 2026-04-08 00:00 |
01:14:05.14 |
-19:54:59.0 |
HIP 5727 |
8.30 |
| 2026-04-08 12:00 |
01:14:09.48 |
-19:54:34.7 |
HIP 5727 |
9.32 |
| 2026-04-09 00:00 |
01:14:13.81 |
-19:54:10.7 |
HIP 5727 |
10.35 |
| 2026-04-09 12:00 |
01:14:18.14 |
-19:53:46.9 |
HIP 5727 |
11.39 |
| 2026-04-10 00:00 |
01:14:22.48 |
-19:53:23.3 |
HIP 5727 |
12.44 |
| 2026-04-10 12:00 |
01:14:26.81 |
-19:53:00.0 |
HIP 5727 |
13.50 |
| 2026-04-11 00:00 |
01:14:31.14 |
-19:52:36.9 |
HIP 5853 |
13.79 |
| 2026-04-11 12:00 |
01:14:35.48 |
-19:52:14.0 |
HIP 5853 |
12.92 |
| 2026-04-12 00:00 |
01:14:39.81 |
-19:51:51.4 |
HIP 5853 |
12.09 |
| 2026-04-12 12:00 |
01:14:44.14 |
-19:51:29.0 |
HIP 5853 |
11.31 |
| 2026-04-13 00:00 |
01:14:48.46 |
-19:51:06.9 |
HIP 5853 |
10.58 |
| 2026-04-13 12:00 |
01:14:52.79 |
-19:50:45.0 |
HIP 5853 |
9.93 |
| 2026-04-14 00:00 |
01:14:57.12 |
-19:50:23.4 |
HIP 5853 |
9.36 |
| 2026-04-14 12:00 |
01:15:01.44 |
-19:50:02.0 |
HIP 5853 |
8.88 |
| 2026-04-15 00:00 |
01:15:05.76 |
-19:49:40.8 |
HIP 5853 |
8.53 |
| 2026-04-15 12:00 |
01:15:10.07 |
-19:49:19.9 |
HIP 5853 |
8.30 |
| 2026-04-16 00:00 |
01:15:14.39 |
-19:48:59.3 |
HIP 5853 |
8.21 |