メタデータ
| 項目 |
値 |
| Designation |
C/2011 Y3 (Boattini) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2011-08-22T22:31:41.001600Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:59Z |
| Obs used |
54 |
| NEO |
- |
| M1 |
11.700 |
| K1 |
10.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2012-01-01.0000000 |
| e |
0.70491483 |
| q (au) |
3.497843 |
| a (au) |
11.853673 |
| i (deg) |
26.516854 |
| Ω (om, deg) |
84.802605 |
| ω (w, deg) |
340.679907 |
| M (ma, deg) |
3.165186 |
等級
散乱 + 全体線形
$$
M_a = (14.177 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
14.177 |
| n |
2.000 |
| gf |
0.997 |
| gb |
-0.953 |
| k |
1.000 |
| δ90 |
6.973 |
| 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 |
15:37:20.04 |
-05:23:18.6 |
HIP 76542 |
9.83 |
| 2026-07-29 12:00 |
15:37:18.59 |
-05:23:39.7 |
HIP 76542 |
10.12 |
| 2026-07-30 00:00 |
15:37:17.18 |
-05:24:01.0 |
HIP 76542 |
10.41 |
| 2026-07-30 12:00 |
15:37:15.82 |
-05:24:22.5 |
HIP 76542 |
10.71 |
| 2026-07-31 00:00 |
15:37:14.52 |
-05:24:44.2 |
HIP 76542 |
11.01 |
| 2026-07-31 12:00 |
15:37:13.26 |
-05:25:06.2 |
HIP 76542 |
11.31 |
| 2026-08-01 00:00 |
15:37:12.05 |
-05:25:28.3 |
HIP 76542 |
11.61 |
| 2026-08-01 12:00 |
15:37:10.90 |
-05:25:50.6 |
HIP 76542 |
11.91 |
| 2026-08-02 00:00 |
15:37:09.79 |
-05:26:13.2 |
HIP 76542 |
12.21 |
| 2026-08-02 12:00 |
15:37:08.73 |
-05:26:36.0 |
HIP 76542 |
12.50 |
| 2026-08-03 00:00 |
15:37:07.72 |
-05:26:58.9 |
HIP 76542 |
12.80 |
| 2026-08-03 12:00 |
15:37:06.76 |
-05:27:22.1 |
HIP 76542 |
13.09 |
| 2026-08-04 00:00 |
15:37:05.86 |
-05:27:45.5 |
HIP 76542 |
13.38 |
| 2026-08-04 12:00 |
15:37:05.00 |
-05:28:09.0 |
HIP 76542 |
13.66 |
| 2026-08-05 00:00 |
15:37:04.19 |
-05:28:32.8 |
HIP 76542 |
13.94 |
| 2026-08-05 12:00 |
15:37:03.43 |
-05:28:56.8 |
HIP 76542 |
14.23 |
| 2026-08-06 00:00 |
15:37:02.72 |
-05:29:20.9 |
HIP 76542 |
14.50 |
| 2026-08-06 12:00 |
15:37:02.07 |
-05:29:45.3 |
HIP 76542 |
14.78 |
| 2026-08-07 00:00 |
15:37:01.46 |
-05:30:09.8 |
HIP 76542 |
15.05 |
| 2026-08-07 12:00 |
15:37:00.90 |
-05:30:34.6 |
HIP 76542 |
15.31 |
| 2026-08-08 00:00 |
15:37:00.40 |
-05:30:59.5 |
HIP 76542 |
15.58 |
| 2026-08-08 12:00 |
15:36:59.94 |
-05:31:24.6 |
HIP 76542 |
15.84 |
| 2026-08-09 00:00 |
15:36:59.54 |
-05:31:49.9 |
HIP 76542 |
16.10 |
| 2026-08-09 12:00 |
15:36:59.19 |
-05:32:15.4 |
HIP 76542 |
16.36 |
| 2026-08-10 00:00 |
15:36:58.89 |
-05:32:41.1 |
HIP 76526 |
16.10 |
| 2026-08-10 12:00 |
15:36:58.63 |
-05:33:07.0 |
HIP 76526 |
15.85 |
| 2026-08-11 00:00 |
15:36:58.43 |
-05:33:33.0 |
HIP 76526 |
15.58 |
| 2026-08-11 12:00 |
15:36:58.28 |
-05:33:59.3 |
HIP 76526 |
15.32 |
| 2026-08-12 00:00 |
15:36:58.18 |
-05:34:25.7 |
HIP 76526 |
15.05 |
| 2026-08-12 12:00 |
15:36:58.14 |
-05:34:52.3 |
HIP 76526 |
14.78 |
| 2026-08-13 00:00 |
15:36:58.14 |
-05:35:19.0 |
HIP 76526 |
14.50 |
| 2026-08-13 12:00 |
15:36:58.20 |
-05:35:46.0 |
HIP 76526 |
14.22 |
| 2026-08-14 00:00 |
15:36:58.30 |
-05:36:13.1 |
HIP 76526 |
13.94 |
| 2026-08-14 12:00 |
15:36:58.46 |
-05:36:40.4 |
HIP 76526 |
13.66 |
| 2026-08-15 00:00 |
15:36:58.66 |
-05:37:07.8 |
HIP 76526 |
13.37 |
| 2026-08-15 12:00 |
15:36:58.92 |
-05:37:35.4 |
HIP 76526 |
13.08 |
| 2026-08-16 00:00 |
15:36:59.23 |
-05:38:03.2 |
HIP 76526 |
12.79 |
| 2026-08-16 12:00 |
15:36:59.59 |
-05:38:31.2 |
HIP 76526 |
12.49 |
| 2026-08-17 00:00 |
15:37:00.00 |
-05:38:59.3 |
HIP 76526 |
12.20 |
| 2026-08-17 12:00 |
15:37:00.46 |
-05:39:27.5 |
HIP 76526 |
11.90 |
| 2026-08-18 00:00 |
15:37:00.98 |
-05:39:56.0 |
HIP 76526 |
11.61 |
| 2026-08-18 12:00 |
15:37:01.54 |
-05:40:24.5 |
HIP 76526 |
11.31 |
| 2026-08-19 00:00 |
15:37:02.15 |
-05:40:53.3 |
HIP 76526 |
11.02 |