メタデータ
| 項目 |
値 |
| Designation |
C/2000 S5 |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2000-10-26T15:21:36Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:06Z |
| Obs used |
11 |
| NEO |
- |
| M1 |
9.900 |
| K1 |
15.250 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2000-10-10.0000000 |
| e |
1.00000000 |
| q (au) |
0.601800 |
| a (au) |
- |
| i (deg) |
53.820000 |
| Ω (om, deg) |
341.630000 |
| ω (w, deg) |
291.480000 |
| M (ma, deg) |
- |
等級
散乱 + 全体線形
$$
M_a = (10.131 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
10.131 |
| n |
6.000 |
| gf |
0.800 |
| gb |
-0.500 |
| k |
0.800 |
| δ90 |
1.000 |
| 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) |
| 2026-05-12 00:00 |
05:10:15.60 |
+75:20:14.5 |
HIP 24194 |
5.50 |
| 2026-05-12 12:00 |
05:10:24.20 |
+75:20:02.8 |
HIP 24194 |
5.03 |
| 2026-05-13 00:00 |
05:10:32.84 |
+75:19:51.2 |
HIP 24194 |
4.58 |
| 2026-05-13 12:00 |
05:10:41.51 |
+75:19:39.8 |
HIP 24194 |
4.17 |
| 2026-05-14 00:00 |
05:10:50.21 |
+75:19:28.6 |
HIP 24194 |
3.78 |
| 2026-05-14 12:00 |
05:10:58.94 |
+75:19:17.7 |
HIP 24194 |
3.46 |
| 2026-05-15 00:00 |
05:11:07.71 |
+75:19:06.9 |
HIP 24194 |
3.19 |
| 2026-05-15 12:00 |
05:11:16.50 |
+75:18:56.4 |
HIP 24194 |
3.02 |
| 2026-05-16 00:00 |
05:11:25.31 |
+75:18:46.0 |
HIP 24194 |
2.95 |
| 2026-05-16 12:00 |
05:11:34.16 |
+75:18:35.9 |
HIP 24194 |
2.99 |
| 2026-05-17 00:00 |
05:11:43.04 |
+75:18:26.0 |
HIP 24194 |
3.14 |
| 2026-05-17 12:00 |
05:11:51.94 |
+75:18:16.3 |
HIP 24194 |
3.38 |
| 2026-05-18 00:00 |
05:12:00.87 |
+75:18:06.8 |
HIP 24194 |
3.70 |
| 2026-05-18 12:00 |
05:12:09.82 |
+75:17:57.6 |
HIP 24194 |
4.07 |
| 2026-05-19 00:00 |
05:12:18.80 |
+75:17:48.5 |
HIP 24194 |
4.49 |
| 2026-05-19 12:00 |
05:12:27.80 |
+75:17:39.6 |
HIP 24194 |
4.94 |
| 2026-05-20 00:00 |
05:12:36.83 |
+75:17:31.0 |
HIP 24194 |
5.42 |
| 2026-05-20 12:00 |
05:12:45.88 |
+75:17:22.6 |
HIP 24194 |
5.91 |
| 2026-05-21 00:00 |
05:12:54.96 |
+75:17:14.4 |
HIP 24194 |
6.42 |
| 2026-05-21 12:00 |
05:13:04.05 |
+75:17:06.4 |
HIP 24194 |
6.94 |
| 2026-05-22 00:00 |
05:13:13.17 |
+75:16:58.6 |
HIP 24194 |
7.47 |
| 2026-05-22 12:00 |
05:13:22.31 |
+75:16:51.0 |
HIP 24194 |
8.01 |
| 2026-05-23 00:00 |
05:13:31.47 |
+75:16:43.7 |
HIP 24194 |
8.56 |
| 2026-05-23 12:00 |
05:13:40.65 |
+75:16:36.6 |
HIP 24194 |
9.11 |
| 2026-05-24 00:00 |
05:13:49.85 |
+75:16:29.6 |
HIP 24194 |
9.66 |
| 2026-05-24 12:00 |
05:13:59.07 |
+75:16:22.9 |
HIP 24194 |
10.22 |
| 2026-05-25 00:00 |
05:14:08.31 |
+75:16:16.4 |
HIP 24194 |
10.78 |
| 2026-05-25 12:00 |
05:14:17.56 |
+75:16:10.1 |
HIP 24194 |
11.35 |
| 2026-05-26 00:00 |
05:14:26.83 |
+75:16:04.1 |
HIP 24194 |
11.91 |
| 2026-05-26 12:00 |
05:14:36.12 |
+75:15:58.2 |
HIP 24194 |
12.48 |
| 2026-05-27 00:00 |
05:14:45.43 |
+75:15:52.6 |
HIP 24194 |
13.05 |
| 2026-05-27 12:00 |
05:14:54.75 |
+75:15:47.2 |
HIP 24194 |
13.63 |
| 2026-05-28 00:00 |
05:15:04.09 |
+75:15:42.0 |
HIP 24194 |
14.20 |
| 2026-05-28 12:00 |
05:15:13.44 |
+75:15:37.0 |
HIP 24194 |
14.78 |
| 2026-05-29 00:00 |
05:15:22.81 |
+75:15:32.2 |
HIP 24194 |
15.36 |
| 2026-05-29 12:00 |
05:15:32.19 |
+75:15:27.6 |
HIP 24194 |
15.93 |
| 2026-05-30 00:00 |
05:15:41.58 |
+75:15:23.3 |
HIP 24194 |
16.51 |
| 2026-05-30 12:00 |
05:15:50.99 |
+75:15:19.1 |
HIP 24194 |
17.09 |
| 2026-05-31 00:00 |
05:16:00.41 |
+75:15:15.2 |
HIP 24194 |
17.67 |
| 2026-05-31 12:00 |
05:16:09.84 |
+75:15:11.5 |
HIP 24194 |
18.26 |
| 2026-06-01 00:00 |
05:16:19.29 |
+75:15:08.0 |
HIP 24194 |
18.84 |
| 2026-06-01 12:00 |
05:16:28.74 |
+75:15:04.7 |
HIP 24194 |
19.42 |
| 2026-06-02 00:00 |
05:16:38.21 |
+75:15:01.7 |
HIP 24194 |
20.01 |