メタデータ
| 項目 |
値 |
| Designation |
C/2009 K3 (Beshore) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2010-12-16T23:14:58.859520Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:31Z |
| Obs used |
20 |
| NEO |
- |
| M1 |
9.000 |
| 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) |
2009-05-27.0000000 |
| e |
1.00000000 |
| q (au) |
2.869026 |
| a (au) |
- |
| i (deg) |
144.420909 |
| Ω (om, deg) |
0.729520 |
| ω (w, deg) |
268.400721 |
| M (ma, deg) |
- |
等級
散乱 + 全体線形
$$
M_a = (4.130 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
4.130 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.811 |
| k |
1.000 |
| 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 |
20:36:56.62 |
+09:51:59.6 |
HIP 101820 |
25.07 |
| 2026-03-26 12:00 |
20:36:58.25 |
+09:52:28.6 |
HIP 101820 |
24.44 |
| 2026-03-27 00:00 |
20:36:59.85 |
+09:52:57.6 |
HIP 101820 |
23.82 |
| 2026-03-27 12:00 |
20:37:01.43 |
+09:53:26.7 |
HIP 101820 |
23.20 |
| 2026-03-28 00:00 |
20:37:02.98 |
+09:53:55.8 |
HIP 101820 |
22.58 |
| 2026-03-28 12:00 |
20:37:04.50 |
+09:54:24.9 |
HIP 101820 |
21.97 |
| 2026-03-29 00:00 |
20:37:06.00 |
+09:54:54.0 |
HIP 101820 |
21.36 |
| 2026-03-29 12:00 |
20:37:07.47 |
+09:55:23.2 |
HIP 101820 |
20.75 |
| 2026-03-30 00:00 |
20:37:08.91 |
+09:55:52.4 |
HIP 101820 |
20.15 |
| 2026-03-30 12:00 |
20:37:10.33 |
+09:56:21.6 |
HIP 101820 |
19.56 |
| 2026-03-31 00:00 |
20:37:11.72 |
+09:56:50.8 |
HIP 101820 |
18.96 |
| 2026-03-31 12:00 |
20:37:13.08 |
+09:57:20.0 |
HIP 101820 |
18.37 |
| 2026-04-01 00:00 |
20:37:14.42 |
+09:57:49.3 |
HIP 101820 |
17.79 |
| 2026-04-01 12:00 |
20:37:15.73 |
+09:58:18.5 |
HIP 101820 |
17.21 |
| 2026-04-02 00:00 |
20:37:17.01 |
+09:58:47.8 |
HIP 101820 |
16.63 |
| 2026-04-02 12:00 |
20:37:18.27 |
+09:59:17.1 |
HIP 101820 |
16.06 |
| 2026-04-03 00:00 |
20:37:19.49 |
+09:59:46.3 |
HIP 101820 |
15.50 |
| 2026-04-03 12:00 |
20:37:20.69 |
+10:00:15.6 |
HIP 101820 |
14.94 |
| 2026-04-04 00:00 |
20:37:21.86 |
+10:00:44.9 |
HIP 101820 |
14.38 |
| 2026-04-04 12:00 |
20:37:23.01 |
+10:01:14.2 |
HIP 101820 |
13.83 |
| 2026-04-05 00:00 |
20:37:24.12 |
+10:01:43.5 |
HIP 101820 |
13.29 |
| 2026-04-05 12:00 |
20:37:25.21 |
+10:02:12.8 |
HIP 101820 |
12.75 |
| 2026-04-06 00:00 |
20:37:26.27 |
+10:02:42.1 |
HIP 101820 |
12.22 |
| 2026-04-06 12:00 |
20:37:27.30 |
+10:03:11.3 |
HIP 101820 |
11.70 |
| 2026-04-07 00:00 |
20:37:28.31 |
+10:03:40.6 |
HIP 101820 |
11.18 |
| 2026-04-07 12:00 |
20:37:29.28 |
+10:04:09.9 |
HIP 101820 |
10.68 |
| 2026-04-08 00:00 |
20:37:30.23 |
+10:04:39.1 |
HIP 101820 |
10.18 |
| 2026-04-08 12:00 |
20:37:31.14 |
+10:05:08.3 |
HIP 101820 |
9.69 |
| 2026-04-09 00:00 |
20:37:32.03 |
+10:05:37.5 |
HIP 101820 |
9.21 |
| 2026-04-09 12:00 |
20:37:32.89 |
+10:06:06.7 |
HIP 101820 |
8.75 |
| 2026-04-10 00:00 |
20:37:33.72 |
+10:06:35.9 |
HIP 101820 |
8.30 |
| 2026-04-10 12:00 |
20:37:34.53 |
+10:07:05.0 |
HIP 101820 |
7.86 |
| 2026-04-11 00:00 |
20:37:35.30 |
+10:07:34.2 |
HIP 101820 |
7.45 |
| 2026-04-11 12:00 |
20:37:36.04 |
+10:08:03.3 |
HIP 101820 |
7.05 |
| 2026-04-12 00:00 |
20:37:36.76 |
+10:08:32.3 |
HIP 101820 |
6.68 |
| 2026-04-12 12:00 |
20:37:37.44 |
+10:09:01.4 |
HIP 101820 |
6.33 |
| 2026-04-13 00:00 |
20:37:38.10 |
+10:09:30.4 |
HIP 101820 |
6.02 |
| 2026-04-13 12:00 |
20:37:38.72 |
+10:09:59.3 |
HIP 101820 |
5.74 |
| 2026-04-14 00:00 |
20:37:39.32 |
+10:10:28.3 |
HIP 101820 |
5.50 |
| 2026-04-14 12:00 |
20:37:39.89 |
+10:10:57.2 |
HIP 101820 |
5.31 |
| 2026-04-15 00:00 |
20:37:40.42 |
+10:11:26.0 |
HIP 101820 |
5.16 |
| 2026-04-15 12:00 |
20:37:40.93 |
+10:11:54.8 |
HIP 101820 |
5.07 |
| 2026-04-16 00:00 |
20:37:41.40 |
+10:12:23.6 |
HIP 101820 |
5.03 |