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) |
| 2026-07-29 00:00 |
01:19:51.18 |
+09:24:33.0 |
HIP 6268 |
10.37 |
| 2026-07-29 12:00 |
01:19:55.99 |
+09:24:31.1 |
HIP 6268 |
9.53 |
| 2026-07-30 00:00 |
01:20:00.56 |
+09:24:27.6 |
HIP 6268 |
8.84 |
| 2026-07-30 12:00 |
01:20:04.90 |
+09:24:22.6 |
HIP 6268 |
8.29 |
| 2026-07-31 00:00 |
01:20:09.00 |
+09:24:16.1 |
HIP 6268 |
7.90 |
| 2026-07-31 12:00 |
01:20:12.87 |
+09:24:08.0 |
HIP 6268 |
7.67 |
| 2026-08-01 00:00 |
01:20:16.49 |
+09:23:58.4 |
HIP 6268 |
7.59 |
| 2026-08-01 12:00 |
01:20:19.88 |
+09:23:47.2 |
HIP 6268 |
7.65 |
| 2026-08-02 00:00 |
01:20:23.03 |
+09:23:34.5 |
HIP 6268 |
7.83 |
| 2026-08-02 12:00 |
01:20:25.94 |
+09:23:20.2 |
HIP 6268 |
8.11 |
| 2026-08-03 00:00 |
01:20:28.60 |
+09:23:04.4 |
HIP 6268 |
8.46 |
| 2026-08-03 12:00 |
01:20:31.03 |
+09:22:47.0 |
HIP 6268 |
8.86 |
| 2026-08-04 00:00 |
01:20:33.21 |
+09:22:28.1 |
HIP 6268 |
9.31 |
| 2026-08-04 12:00 |
01:20:35.15 |
+09:22:07.5 |
HIP 6268 |
9.77 |
| 2026-08-05 00:00 |
01:20:36.85 |
+09:21:45.4 |
HIP 6268 |
10.26 |
| 2026-08-05 12:00 |
01:20:38.30 |
+09:21:21.7 |
HIP 6268 |
10.75 |
| 2026-08-06 00:00 |
01:20:39.51 |
+09:20:56.4 |
HIP 6268 |
11.26 |
| 2026-08-06 12:00 |
01:20:40.47 |
+09:20:29.6 |
HIP 6268 |
11.76 |
| 2026-08-07 00:00 |
01:20:41.18 |
+09:20:01.1 |
HIP 6277 |
11.91 |
| 2026-08-07 12:00 |
01:20:41.65 |
+09:19:31.0 |
HIP 6277 |
11.44 |
| 2026-08-08 00:00 |
01:20:41.87 |
+09:18:59.4 |
HIP 6277 |
10.93 |
| 2026-08-08 12:00 |
01:20:41.84 |
+09:18:26.1 |
HIP 6277 |
10.39 |
| 2026-08-09 00:00 |
01:20:41.57 |
+09:17:51.2 |
HIP 6277 |
9.81 |
| 2026-08-09 12:00 |
01:20:41.05 |
+09:17:14.7 |
HIP 6277 |
9.19 |
| 2026-08-10 00:00 |
01:20:40.27 |
+09:16:36.6 |
HIP 6277 |
8.53 |
| 2026-08-10 12:00 |
01:20:39.25 |
+09:15:56.9 |
HIP 6277 |
7.82 |
| 2026-08-11 00:00 |
01:20:37.98 |
+09:15:15.6 |
HIP 6277 |
7.09 |
| 2026-08-11 12:00 |
01:20:36.46 |
+09:14:32.6 |
HIP 6277 |
6.32 |
| 2026-08-12 00:00 |
01:20:34.69 |
+09:13:48.0 |
HIP 6277 |
5.52 |
| 2026-08-12 12:00 |
01:20:32.67 |
+09:13:01.8 |
HIP 6277 |
4.72 |
| 2026-08-13 00:00 |
01:20:30.40 |
+09:12:14.0 |
HIP 6277 |
3.96 |
| 2026-08-13 12:00 |
01:20:27.89 |
+09:11:24.6 |
HIP 6277 |
3.30 |
| 2026-08-14 00:00 |
01:20:25.12 |
+09:10:33.5 |
HIP 6277 |
2.89 |
| 2026-08-14 12:00 |
01:20:22.10 |
+09:09:40.8 |
HIP 6277 |
2.90 |
| 2026-08-15 00:00 |
01:20:18.83 |
+09:08:46.5 |
HIP 6277 |
3.39 |
| 2026-08-15 12:00 |
01:20:15.32 |
+09:07:50.6 |
HIP 6277 |
4.25 |
| 2026-08-16 00:00 |
01:20:11.56 |
+09:06:53.1 |
HIP 6277 |
5.35 |
| 2026-08-16 12:00 |
01:20:07.55 |
+09:05:54.0 |
HIP 6277 |
6.60 |
| 2026-08-17 00:00 |
01:20:03.29 |
+09:04:53.2 |
HIP 6277 |
7.97 |
| 2026-08-17 12:00 |
01:19:58.78 |
+09:03:50.9 |
HIP 6277 |
9.43 |
| 2026-08-18 00:00 |
01:19:54.03 |
+09:02:46.9 |
HIP 6277 |
10.97 |
| 2026-08-18 12:00 |
01:19:49.03 |
+09:01:41.3 |
HIP 6277 |
12.59 |
| 2026-08-19 00:00 |
01:19:43.79 |
+09:00:34.2 |
HIP 6277 |
14.29 |