メタデータ
| 項目 |
値 |
| Designation |
C/2009 P2 (Boattini) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2010-02-10T12:15:33.076800Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:33Z |
| Obs used |
507 |
| NEO |
- |
| M1 |
11.400 |
| K1 |
4.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2009-12-14.0000000 |
| e |
1.00153878 |
| q (au) |
6.543973 |
| a (au) |
-4252.703414 |
| i (deg) |
163.452939 |
| Ω (om, deg) |
60.364967 |
| ω (w, deg) |
76.032402 |
| M (ma, deg) |
-0.000208 |
等級
散乱 + 全体線形
$$
M_a = (5.288 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
5.288 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.687 |
| k |
0.800 |
| δ90 |
9.998 |
| 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 |
14:13:10.54 |
-19:48:34.7 |
HIP 69528 |
26.54 |
| 2026-07-29 12:00 |
14:13:10.14 |
-19:48:28.3 |
HIP 69528 |
26.68 |
| 2026-07-30 00:00 |
14:13:09.77 |
-19:48:22.0 |
HIP 69528 |
26.82 |
| 2026-07-30 12:00 |
14:13:09.43 |
-19:48:15.9 |
HIP 69528 |
26.94 |
| 2026-07-31 00:00 |
14:13:09.12 |
-19:48:09.9 |
HIP 69528 |
27.06 |
| 2026-07-31 12:00 |
14:13:08.85 |
-19:48:04.1 |
HIP 69528 |
27.18 |
| 2026-08-01 00:00 |
14:13:08.61 |
-19:47:58.4 |
HIP 69528 |
27.29 |
| 2026-08-01 12:00 |
14:13:08.39 |
-19:47:52.9 |
HIP 69528 |
27.39 |
| 2026-08-02 00:00 |
14:13:08.21 |
-19:47:47.6 |
HIP 69528 |
27.49 |
| 2026-08-02 12:00 |
14:13:08.07 |
-19:47:42.4 |
HIP 69528 |
27.58 |
| 2026-08-03 00:00 |
14:13:07.95 |
-19:47:37.4 |
HIP 69528 |
27.67 |
| 2026-08-03 12:00 |
14:13:07.86 |
-19:47:32.6 |
HIP 69528 |
27.75 |
| 2026-08-04 00:00 |
14:13:07.81 |
-19:47:27.9 |
HIP 69528 |
27.83 |
| 2026-08-04 12:00 |
14:13:07.79 |
-19:47:23.4 |
HIP 69528 |
27.90 |
| 2026-08-05 00:00 |
14:13:07.80 |
-19:47:19.1 |
HIP 69528 |
27.96 |
| 2026-08-05 12:00 |
14:13:07.84 |
-19:47:14.9 |
HIP 69528 |
28.02 |
| 2026-08-06 00:00 |
14:13:07.91 |
-19:47:10.9 |
HIP 69528 |
28.07 |
| 2026-08-06 12:00 |
14:13:08.01 |
-19:47:07.0 |
HIP 69528 |
28.12 |
| 2026-08-07 00:00 |
14:13:08.15 |
-19:47:03.3 |
HIP 69528 |
28.16 |
| 2026-08-07 12:00 |
14:13:08.32 |
-19:46:59.8 |
HIP 69528 |
28.20 |
| 2026-08-08 00:00 |
14:13:08.51 |
-19:46:56.4 |
HIP 69528 |
28.23 |
| 2026-08-08 12:00 |
14:13:08.74 |
-19:46:53.2 |
HIP 69528 |
28.25 |
| 2026-08-09 00:00 |
14:13:09.00 |
-19:46:50.2 |
HIP 69528 |
28.27 |
| 2026-08-09 12:00 |
14:13:09.29 |
-19:46:47.4 |
HIP 69528 |
28.29 |
| 2026-08-10 00:00 |
14:13:09.61 |
-19:46:44.7 |
HIP 69528 |
28.30 |
| 2026-08-10 12:00 |
14:13:09.97 |
-19:46:42.1 |
HIP 69528 |
28.30 |
| 2026-08-11 00:00 |
14:13:10.35 |
-19:46:39.8 |
HIP 69528 |
28.30 |
| 2026-08-11 12:00 |
14:13:10.77 |
-19:46:37.6 |
HIP 69528 |
28.29 |
| 2026-08-12 00:00 |
14:13:11.21 |
-19:46:35.6 |
HIP 69528 |
28.28 |
| 2026-08-12 12:00 |
14:13:11.69 |
-19:46:33.7 |
HIP 69528 |
28.27 |
| 2026-08-13 00:00 |
14:13:12.19 |
-19:46:32.0 |
HIP 69528 |
28.25 |
| 2026-08-13 12:00 |
14:13:12.73 |
-19:46:30.5 |
HIP 69528 |
28.22 |
| 2026-08-14 00:00 |
14:13:13.30 |
-19:46:29.1 |
HIP 69528 |
28.19 |
| 2026-08-14 12:00 |
14:13:13.90 |
-19:46:27.9 |
HIP 69528 |
28.15 |
| 2026-08-15 00:00 |
14:13:14.53 |
-19:46:26.9 |
HIP 69528 |
28.11 |
| 2026-08-15 12:00 |
14:13:15.18 |
-19:46:26.1 |
HIP 69528 |
28.07 |
| 2026-08-16 00:00 |
14:13:15.87 |
-19:46:25.4 |
HIP 69528 |
28.02 |
| 2026-08-16 12:00 |
14:13:16.59 |
-19:46:24.8 |
HIP 69528 |
27.96 |
| 2026-08-17 00:00 |
14:13:17.34 |
-19:46:24.5 |
HIP 69528 |
27.91 |
| 2026-08-17 12:00 |
14:13:18.11 |
-19:46:24.3 |
HIP 69528 |
27.85 |
| 2026-08-18 00:00 |
14:13:18.92 |
-19:46:24.2 |
HIP 69528 |
27.78 |
| 2026-08-18 12:00 |
14:13:19.76 |
-19:46:24.4 |
HIP 69528 |
27.71 |
| 2026-08-19 00:00 |
14:13:20.62 |
-19:46:24.7 |
HIP 69528 |
27.64 |