メタデータ
| 項目 |
値 |
| Designation |
105P/Singer Brewster |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2012-02-25T23:41:27.876480Z |
| Orbit solution date (soln_date, UTC) |
2025-10-06T22:38:31Z |
| Obs used |
898 |
| NEO |
- |
| M1 |
13.700 |
| K1 |
10.250 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2013-09-15.0000000 |
| e |
0.40905926 |
| q (au) |
2.050165 |
| a (au) |
3.469324 |
| i (deg) |
9.171690 |
| Ω (om, deg) |
192.411758 |
| ω (w, deg) |
46.610938 |
| M (ma, deg) |
86.482795 |
等級
散乱 + 全体線形
$$
M_a = (18.483 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
18.483 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.677 |
| 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) |
| 2026-06-01 00:00 |
00:48:03.31 |
+06:59:26.8 |
HIP 3697 |
17.93 |
| 2026-06-01 12:00 |
00:48:28.96 |
+07:01:44.8 |
HIP 3760 |
16.50 |
| 2026-06-02 00:00 |
00:48:54.48 |
+07:04:01.9 |
HIP 3760 |
16.73 |
| 2026-06-02 12:00 |
00:49:19.88 |
+07:06:18.2 |
HIP 3760 |
19.42 |
| 2026-06-03 00:00 |
00:49:45.15 |
+07:08:33.6 |
HIP 3760 |
23.73 |
| 2026-06-03 12:00 |
00:50:10.30 |
+07:10:48.0 |
HIP 3972 |
21.42 |
| 2026-06-04 00:00 |
00:50:35.32 |
+07:13:01.6 |
HIP 3972 |
20.30 |
| 2026-06-04 12:00 |
00:51:00.22 |
+07:15:14.3 |
HIP 3972 |
21.27 |
| 2026-06-05 00:00 |
00:51:24.98 |
+07:17:26.1 |
HIP 3972 |
24.03 |
| 2026-06-05 12:00 |
00:51:49.62 |
+07:19:36.9 |
HIP 4113 |
26.22 |
| 2026-06-06 00:00 |
00:52:14.13 |
+07:21:46.9 |
HIP 4113 |
21.63 |
| 2026-06-06 12:00 |
00:52:38.51 |
+07:23:55.9 |
HIP 4113 |
18.24 |
| 2026-06-07 00:00 |
00:53:02.75 |
+07:26:04.0 |
HIP 4219 |
15.16 |
| 2026-06-07 12:00 |
00:53:26.87 |
+07:28:11.1 |
HIP 4219 |
13.15 |
| 2026-06-08 00:00 |
00:53:50.84 |
+07:30:17.3 |
HIP 4219 |
14.01 |
| 2026-06-08 12:00 |
00:54:14.69 |
+07:32:22.6 |
HIP 4219 |
17.27 |
| 2026-06-09 00:00 |
00:54:38.40 |
+07:34:26.9 |
HIP 4219 |
21.84 |
| 2026-06-09 12:00 |
00:55:01.97 |
+07:36:30.3 |
HIP 4219 |
27.06 |
| 2026-06-10 00:00 |
00:55:25.41 |
+07:38:32.6 |
HIP 4447 |
22.94 |
| 2026-06-10 12:00 |
00:55:48.70 |
+07:40:34.1 |
HIP 4447 |
18.15 |
| 2026-06-11 00:00 |
00:56:11.86 |
+07:42:34.5 |
HIP 4447 |
14.43 |
| 2026-06-11 12:00 |
00:56:34.88 |
+07:44:33.9 |
HIP 4447 |
12.68 |
| 2026-06-12 00:00 |
00:56:57.75 |
+07:46:32.4 |
HIP 4447 |
13.63 |
| 2026-06-12 12:00 |
00:57:20.48 |
+07:48:29.8 |
HIP 4526 |
15.09 |
| 2026-06-13 00:00 |
00:57:43.07 |
+07:50:26.3 |
HIP 4526 |
14.26 |
| 2026-06-13 12:00 |
00:58:05.51 |
+07:52:21.7 |
HIP 4526 |
15.76 |
| 2026-06-14 00:00 |
00:58:27.81 |
+07:54:16.1 |
HIP 4601 |
13.49 |
| 2026-06-14 12:00 |
00:58:49.96 |
+07:56:09.5 |
HIP 4601 |
13.18 |
| 2026-06-15 00:00 |
00:59:11.96 |
+07:58:01.8 |
HIP 4601 |
15.23 |
| 2026-06-15 12:00 |
00:59:33.81 |
+07:59:53.1 |
HIP 4601 |
18.85 |
| 2026-06-16 00:00 |
00:59:55.51 |
+08:01:43.4 |
HIP 4763 |
18.88 |
| 2026-06-16 12:00 |
01:00:17.06 |
+08:03:32.6 |
HIP 4763 |
13.62 |
| 2026-06-17 00:00 |
01:00:38.45 |
+08:05:20.7 |
HIP 4763 |
8.88 |
| 2026-06-17 12:00 |
01:00:59.70 |
+08:07:07.8 |
HIP 4763 |
5.90 |
| 2026-06-18 00:00 |
01:01:20.78 |
+08:08:53.8 |
HIP 4763 |
7.21 |
| 2026-06-18 12:00 |
01:01:41.72 |
+08:10:38.8 |
HIP 4763 |
11.36 |
| 2026-06-19 00:00 |
01:02:02.49 |
+08:12:22.6 |
HIP 4832 |
15.99 |
| 2026-06-19 12:00 |
01:02:23.11 |
+08:14:05.4 |
HIP 4832 |
18.12 |
| 2026-06-20 00:00 |
01:02:43.58 |
+08:15:47.1 |
HIP 4832 |
21.39 |
| 2026-06-20 12:00 |
01:03:03.88 |
+08:17:27.7 |
HIP 4906 |
24.12 |
| 2026-06-21 00:00 |
01:03:24.02 |
+08:19:07.2 |
HIP 4906 |
26.59 |
| 2026-06-21 12:00 |
01:03:44.01 |
+08:20:45.6 |
HIP 5103 |
24.78 |
| 2026-06-22 00:00 |
01:04:03.83 |
+08:22:22.9 |
HIP 5103 |
20.01 |