メタデータ
| 項目 |
値 |
| Designation |
87P/Bus |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2013-12-19T21:38:08.010240Z |
| Orbit solution date (soln_date, UTC) |
2020-09-28T09:20:31Z |
| Obs used |
667 |
| NEO |
- |
| M1 |
12.700 |
| K1 |
14.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2016-03-20.0000000 |
| e |
0.38934769 |
| q (au) |
2.101175 |
| a (au) |
3.440869 |
| i (deg) |
2.602394 |
| Ω (om, deg) |
181.889806 |
| ω (w, deg) |
24.756386 |
| M (ma, deg) |
126.793522 |
等級
散乱 + 全体線形
$$
M_a = (12.080 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
12.080 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.756 |
| k |
0.993 |
| 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 |
06:36:46.13 |
+20:03:53.0 |
HIP 31680 |
13.40 |
| 2026-06-01 12:00 |
06:37:13.48 |
+20:03:38.4 |
HIP 31680 |
7.17 |
| 2026-06-02 00:00 |
06:37:40.88 |
+20:03:23.3 |
HIP 31680 |
2.45 |
| 2026-06-02 12:00 |
06:38:08.34 |
+20:03:07.8 |
HIP 31680 |
6.61 |
| 2026-06-03 00:00 |
06:38:35.84 |
+20:02:51.9 |
HIP 31680 |
12.84 |
| 2026-06-03 12:00 |
06:39:03.40 |
+20:02:35.5 |
HIP 31680 |
19.24 |
| 2026-06-04 00:00 |
06:39:31.00 |
+20:02:18.6 |
HIP 31896 |
23.98 |
| 2026-06-04 12:00 |
06:39:58.65 |
+20:02:01.3 |
HIP 32016 |
19.34 |
| 2026-06-05 00:00 |
06:40:26.35 |
+20:01:43.6 |
HIP 32016 |
12.96 |
| 2026-06-05 12:00 |
06:40:54.10 |
+20:01:25.4 |
HIP 32016 |
6.81 |
| 2026-06-06 00:00 |
06:41:21.90 |
+20:01:06.8 |
HIP 32016 |
3.17 |
| 2026-06-06 12:00 |
06:41:49.74 |
+20:00:47.7 |
HIP 32016 |
7.70 |
| 2026-06-07 00:00 |
06:42:17.63 |
+20:00:28.2 |
HIP 32016 |
13.95 |
| 2026-06-07 12:00 |
06:42:45.56 |
+20:00:08.2 |
HIP 32016 |
20.41 |
| 2026-06-08 00:00 |
06:43:13.54 |
+19:59:47.7 |
HIP 32302 |
19.97 |
| 2026-06-08 12:00 |
06:43:41.56 |
+19:59:26.8 |
HIP 32302 |
13.38 |
| 2026-06-09 00:00 |
06:44:09.63 |
+19:59:05.5 |
HIP 32302 |
6.79 |
| 2026-06-09 12:00 |
06:44:37.74 |
+19:58:43.7 |
HIP 32302 |
0.56 |
| 2026-06-10 00:00 |
06:45:05.88 |
+19:58:21.4 |
HIP 32302 |
6.49 |
| 2026-06-10 12:00 |
06:45:34.08 |
+19:57:58.7 |
HIP 32302 |
13.11 |
| 2026-06-11 00:00 |
06:46:02.31 |
+19:57:35.6 |
HIP 32302 |
19.76 |
| 2026-06-11 12:00 |
06:46:30.58 |
+19:57:11.9 |
HIP 32302 |
26.41 |
| 2026-06-12 00:00 |
06:46:58.89 |
+19:56:47.9 |
HIP 32302 |
33.07 |
| 2026-06-12 12:00 |
06:47:27.23 |
+19:56:23.3 |
HIP 32302 |
39.75 |
| 2026-06-13 00:00 |
06:47:55.62 |
+19:55:58.3 |
HIP 32676 |
40.52 |
| 2026-06-13 12:00 |
06:48:24.04 |
+19:55:32.9 |
HIP 32852 |
34.58 |
| 2026-06-14 00:00 |
06:48:52.50 |
+19:55:06.9 |
HIP 32852 |
28.01 |
| 2026-06-14 12:00 |
06:49:20.99 |
+19:54:40.6 |
HIP 32852 |
21.51 |
| 2026-06-15 00:00 |
06:49:49.52 |
+19:54:13.7 |
HIP 32852 |
15.20 |
| 2026-06-15 12:00 |
06:50:18.08 |
+19:53:46.4 |
HIP 32852 |
9.45 |
| 2026-06-16 00:00 |
06:50:46.67 |
+19:53:18.7 |
HIP 32852 |
6.18 |
| 2026-06-16 12:00 |
06:51:15.30 |
+19:52:50.4 |
HIP 32852 |
8.83 |
| 2026-06-17 00:00 |
06:51:43.96 |
+19:52:21.8 |
HIP 32852 |
14.46 |
| 2026-06-17 12:00 |
06:52:12.64 |
+19:51:52.6 |
HIP 32852 |
20.78 |
| 2026-06-18 00:00 |
06:52:41.36 |
+19:51:23.0 |
HIP 32852 |
27.32 |
| 2026-06-18 12:00 |
06:53:10.10 |
+19:50:53.0 |
HIP 33181 |
22.75 |
| 2026-06-19 00:00 |
06:53:38.87 |
+19:50:22.4 |
HIP 33181 |
17.85 |
| 2026-06-19 12:00 |
06:54:07.67 |
+19:49:51.5 |
HIP 33181 |
14.55 |
| 2026-06-20 00:00 |
06:54:36.50 |
+19:49:20.0 |
HIP 33181 |
14.03 |
| 2026-06-20 12:00 |
06:55:05.35 |
+19:48:48.2 |
HIP 33181 |
16.57 |
| 2026-06-21 00:00 |
06:55:34.22 |
+19:48:15.8 |
HIP 33181 |
21.10 |
| 2026-06-21 12:00 |
06:56:03.12 |
+19:47:43.0 |
HIP 33477 |
21.57 |
| 2026-06-22 00:00 |
06:56:32.04 |
+19:47:09.8 |
HIP 33477 |
14.80 |