メタデータ
| 項目 |
値 |
| Designation |
P/2007 S1 (Zhao) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2007-12-06T20:05:23.029440Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:12Z |
| Obs used |
78 |
| NEO |
- |
| M1 |
13.500 |
| K1 |
10.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2007-09-29.0000000 |
| e |
0.34338434 |
| q (au) |
2.494391 |
| a (au) |
3.798860 |
| i (deg) |
5.973039 |
| Ω (om, deg) |
141.618584 |
| ω (w, deg) |
245.425020 |
| M (ma, deg) |
350.836814 |
等級
散乱 + 全体線形
$$
M_a = (10.896 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
10.896 |
| n |
6.000 |
| gf |
0.870 |
| gb |
-0.881 |
| k |
1.000 |
| δ90 |
2.896 |
| 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 |
13:11:01.73 |
-00:41:52.7 |
HIP 64247 |
15.20 |
| 2026-05-12 12:00 |
13:10:49.36 |
-00:40:53.6 |
HIP 64247 |
11.96 |
| 2026-05-13 00:00 |
13:10:37.13 |
-00:39:55.8 |
HIP 64247 |
8.75 |
| 2026-05-13 12:00 |
13:10:25.04 |
-00:38:59.1 |
HIP 64247 |
5.59 |
| 2026-05-14 00:00 |
13:10:13.09 |
-00:38:03.6 |
HIP 64247 |
2.48 |
| 2026-05-14 12:00 |
13:10:01.29 |
-00:37:09.3 |
HIP 64247 |
0.72 |
| 2026-05-15 00:00 |
13:09:49.64 |
-00:36:16.2 |
HIP 64247 |
3.69 |
| 2026-05-15 12:00 |
13:09:38.14 |
-00:35:24.3 |
HIP 64247 |
6.69 |
| 2026-05-16 00:00 |
13:09:26.78 |
-00:34:33.6 |
HIP 64247 |
9.65 |
| 2026-05-16 12:00 |
13:09:15.58 |
-00:33:44.2 |
HIP 64247 |
12.57 |
| 2026-05-17 00:00 |
13:09:04.54 |
-00:32:55.9 |
HIP 64247 |
15.44 |
| 2026-05-17 12:00 |
13:08:53.64 |
-00:32:08.9 |
HIP 64247 |
18.27 |
| 2026-05-18 00:00 |
13:08:42.90 |
-00:31:23.1 |
HIP 64247 |
21.07 |
| 2026-05-18 12:00 |
13:08:32.32 |
-00:30:38.6 |
HIP 64247 |
23.81 |
| 2026-05-19 00:00 |
13:08:21.90 |
-00:29:55.3 |
HIP 64247 |
26.52 |
| 2026-05-19 12:00 |
13:08:11.64 |
-00:29:13.2 |
HIP 64001 |
26.43 |
| 2026-05-20 00:00 |
13:08:01.54 |
-00:28:32.4 |
HIP 64001 |
24.13 |
| 2026-05-20 12:00 |
13:07:51.61 |
-00:27:52.9 |
HIP 64001 |
21.96 |
| 2026-05-21 00:00 |
13:07:41.83 |
-00:27:14.6 |
HIP 64001 |
19.92 |
| 2026-05-21 12:00 |
13:07:32.22 |
-00:26:37.5 |
HIP 64001 |
18.04 |
| 2026-05-22 00:00 |
13:07:22.78 |
-00:26:01.7 |
HIP 64001 |
16.36 |
| 2026-05-22 12:00 |
13:07:13.50 |
-00:25:27.2 |
HIP 64001 |
14.92 |
| 2026-05-23 00:00 |
13:07:04.39 |
-00:24:53.9 |
HIP 64001 |
13.78 |
| 2026-05-23 12:00 |
13:06:55.45 |
-00:24:21.9 |
HIP 64001 |
13.00 |
| 2026-05-24 00:00 |
13:06:46.67 |
-00:23:51.1 |
HIP 64001 |
12.60 |
| 2026-05-24 12:00 |
13:06:38.07 |
-00:23:21.6 |
HIP 64001 |
12.60 |
| 2026-05-25 00:00 |
13:06:29.63 |
-00:22:53.4 |
HIP 64001 |
12.99 |
| 2026-05-25 12:00 |
13:06:21.37 |
-00:22:26.4 |
HIP 64001 |
13.70 |
| 2026-05-26 00:00 |
13:06:13.28 |
-00:22:00.7 |
HIP 64001 |
14.67 |
| 2026-05-26 12:00 |
13:06:05.36 |
-00:21:36.2 |
HIP 64001 |
15.83 |
| 2026-05-27 00:00 |
13:05:57.61 |
-00:21:13.0 |
HIP 64001 |
17.12 |
| 2026-05-27 12:00 |
13:05:50.04 |
-00:20:51.1 |
HIP 64001 |
18.52 |
| 2026-05-28 00:00 |
13:05:42.64 |
-00:20:30.4 |
HIP 64001 |
19.97 |
| 2026-05-28 12:00 |
13:05:35.41 |
-00:20:10.9 |
HIP 64001 |
21.45 |
| 2026-05-29 00:00 |
13:05:28.36 |
-00:19:52.7 |
HIP 64001 |
22.96 |
| 2026-05-29 12:00 |
13:05:21.49 |
-00:19:35.8 |
HIP 64001 |
24.47 |
| 2026-05-30 00:00 |
13:05:14.79 |
-00:19:20.1 |
HIP 64001 |
25.97 |
| 2026-05-30 12:00 |
13:05:08.27 |
-00:19:05.7 |
HIP 63803 |
25.70 |
| 2026-05-31 00:00 |
13:05:01.92 |
-00:18:52.5 |
HIP 63803 |
25.50 |
| 2026-05-31 12:00 |
13:04:55.75 |
-00:18:40.6 |
HIP 63803 |
25.39 |
| 2026-06-01 00:00 |
13:04:49.76 |
-00:18:29.9 |
HIP 63803 |
25.35 |
| 2026-06-01 12:00 |
13:04:43.94 |
-00:18:20.5 |
HIP 63803 |
25.39 |
| 2026-06-02 00:00 |
13:04:38.31 |
-00:18:12.3 |
HIP 63803 |
25.49 |