105P/Singer Brewster
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
ファインディングチャート
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
22:30:21.00 |
-05:41:22.9 |
HIP 110891 |
38.20 |
| 2026-02-03 12:00 |
22:31:01.49 |
-05:38:05.2 |
HIP 111281 |
36.46 |
| 2026-02-04 00:00 |
22:31:41.97 |
-05:34:47.0 |
HIP 111281 |
27.95 |
| 2026-02-04 12:00 |
22:32:22.42 |
-05:31:28.4 |
HIP 111281 |
21.39 |
| 2026-02-05 00:00 |
22:33:02.86 |
-05:28:09.5 |
HIP 111281 |
18.93 |
| 2026-02-05 12:00 |
22:33:43.28 |
-05:24:50.1 |
HIP 111281 |
21.98 |
| 2026-02-06 00:00 |
22:34:23.67 |
-05:21:30.3 |
HIP 111281 |
28.85 |
| 2026-02-06 12:00 |
22:35:04.05 |
-05:18:10.1 |
HIP 111581 |
20.43 |
| 2026-02-07 00:00 |
22:35:44.40 |
-05:14:49.5 |
HIP 111581 |
10.03 |
| 2026-02-07 12:00 |
22:36:24.73 |
-05:11:28.6 |
HIP 111581 |
2.77 |
| 2026-02-08 00:00 |
22:37:05.05 |
-05:08:07.3 |
HIP 111581 |
11.78 |
| 2026-02-08 12:00 |
22:37:45.33 |
-05:04:45.6 |
HIP 111581 |
22.22 |
| 2026-02-09 00:00 |
22:38:25.60 |
-05:01:23.5 |
HIP 111921 |
32.13 |
| 2026-02-09 12:00 |
22:39:05.84 |
-04:58:01.0 |
HIP 111921 |
21.93 |
| 2026-02-10 00:00 |
22:39:46.07 |
-04:54:38.2 |
HIP 111921 |
12.38 |
| 2026-02-10 12:00 |
22:40:26.26 |
-04:51:15.1 |
HIP 111921 |
7.00 |
| 2026-02-11 00:00 |
22:41:06.44 |
-04:47:51.6 |
HIP 111921 |
12.97 |
| 2026-02-11 12:00 |
22:41:46.59 |
-04:44:27.8 |
HIP 112139 |
16.98 |
| 2026-02-12 00:00 |
22:42:26.71 |
-04:41:03.6 |
HIP 112139 |
6.78 |
| 2026-02-12 12:00 |
22:43:06.81 |
-04:37:39.2 |
HIP 112139 |
5.15 |
| 2026-02-13 00:00 |
22:43:46.89 |
-04:34:14.4 |
HIP 112139 |
15.16 |
| 2026-02-13 12:00 |
22:44:26.94 |
-04:30:49.3 |
HIP 112309 |
25.08 |
| 2026-02-14 00:00 |
22:45:06.96 |
-04:27:23.9 |
HIP 112309 |
27.72 |
| 2026-02-14 12:00 |
22:45:46.96 |
-04:23:58.1 |
HIP 112559 |
32.42 |
| 2026-02-15 00:00 |
22:46:26.93 |
-04:20:32.1 |
HIP 112559 |
21.88 |
| 2026-02-15 12:00 |
22:47:06.87 |
-04:17:05.9 |
HIP 112559 |
11.35 |
| 2026-02-16 00:00 |
22:47:46.78 |
-04:13:39.3 |
HIP 112559 |
0.88 |
| 2026-02-16 12:00 |
22:48:26.67 |
-04:10:12.4 |
HIP 112559 |
9.72 |
| 2026-02-17 00:00 |
22:49:06.53 |
-04:06:45.3 |
HIP 112559 |
20.23 |
| 2026-02-17 12:00 |
22:49:46.36 |
-04:03:18.0 |
HIP 112559 |
30.75 |
| 2026-02-18 00:00 |
22:50:26.16 |
-03:59:50.4 |
HIP 112559 |
41.26 |
| 2026-02-18 12:00 |
22:51:05.93 |
-03:56:22.5 |
HIP 112866 |
42.49 |
| 2026-02-19 00:00 |
22:51:45.67 |
-03:52:54.4 |
HIP 112866 |
39.22 |
| 2026-02-19 12:00 |
22:52:25.38 |
-03:49:26.1 |
HIP 112866 |
38.62 |
| 2026-02-20 00:00 |
22:53:05.06 |
-03:45:57.6 |
HIP 112866 |
40.79 |
| 2026-02-20 12:00 |
22:53:44.70 |
-03:42:28.8 |
HIP 113091 |
44.02 |
| 2026-02-21 00:00 |
22:54:24.32 |
-03:38:59.8 |
HIP 113303 |
35.46 |
| 2026-02-21 12:00 |
22:55:03.90 |
-03:35:30.7 |
HIP 113303 |
25.11 |
| 2026-02-22 00:00 |
22:55:43.45 |
-03:32:01.3 |
HIP 113303 |
14.94 |
| 2026-02-22 12:00 |
22:56:22.96 |
-03:28:31.8 |
HIP 113303 |
5.94 |
| 2026-02-23 00:00 |
22:57:02.44 |
-03:25:02.0 |
HIP 113303 |
8.13 |
| 2026-02-23 12:00 |
22:57:41.89 |
-03:21:32.1 |
HIP 113331 |
11.09 |
| 2026-02-24 00:00 |
22:58:21.30 |
-03:18:02.1 |
HIP 113355 |
16.29 |