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) |
| 2026-06-01 00:00 |
14:17:25.89 |
-20:16:24.5 |
HIP 69828 |
18.59 |
| 2026-06-01 12:00 |
14:17:22.15 |
-20:16:04.6 |
HIP 69828 |
18.30 |
| 2026-06-02 00:00 |
14:17:18.43 |
-20:15:44.7 |
HIP 69828 |
18.05 |
| 2026-06-02 12:00 |
14:17:14.73 |
-20:15:24.9 |
HIP 69828 |
17.85 |
| 2026-06-03 00:00 |
14:17:11.05 |
-20:15:05.1 |
HIP 69828 |
17.70 |
| 2026-06-03 12:00 |
14:17:07.39 |
-20:14:45.3 |
HIP 69828 |
17.59 |
| 2026-06-04 00:00 |
14:17:03.75 |
-20:14:25.6 |
HIP 69828 |
17.53 |
| 2026-06-04 12:00 |
14:17:00.14 |
-20:14:06.0 |
HIP 69828 |
17.52 |
| 2026-06-05 00:00 |
14:16:56.54 |
-20:13:46.4 |
HIP 69828 |
17.55 |
| 2026-06-05 12:00 |
14:16:52.97 |
-20:13:26.8 |
HIP 69828 |
17.63 |
| 2026-06-06 00:00 |
14:16:49.42 |
-20:13:07.4 |
HIP 69828 |
17.75 |
| 2026-06-06 12:00 |
14:16:45.89 |
-20:12:48.0 |
HIP 69828 |
17.91 |
| 2026-06-07 00:00 |
14:16:42.38 |
-20:12:28.6 |
HIP 69828 |
18.11 |
| 2026-06-07 12:00 |
14:16:38.90 |
-20:12:09.3 |
HIP 69828 |
18.35 |
| 2026-06-08 00:00 |
14:16:35.44 |
-20:11:50.1 |
HIP 69828 |
18.63 |
| 2026-06-08 12:00 |
14:16:32.00 |
-20:11:30.9 |
HIP 69828 |
18.94 |
| 2026-06-09 00:00 |
14:16:28.58 |
-20:11:11.8 |
HIP 69828 |
19.28 |
| 2026-06-09 12:00 |
14:16:25.19 |
-20:10:52.8 |
HIP 69828 |
19.65 |
| 2026-06-10 00:00 |
14:16:21.83 |
-20:10:33.9 |
HIP 69828 |
20.04 |
| 2026-06-10 12:00 |
14:16:18.48 |
-20:10:15.0 |
HIP 69828 |
20.46 |
| 2026-06-11 00:00 |
14:16:15.16 |
-20:09:56.2 |
HIP 69828 |
20.91 |
| 2026-06-11 12:00 |
14:16:11.87 |
-20:09:37.4 |
HIP 69828 |
21.37 |
| 2026-06-12 00:00 |
14:16:08.60 |
-20:09:18.8 |
HIP 69828 |
21.85 |
| 2026-06-12 12:00 |
14:16:05.35 |
-20:09:00.2 |
HIP 69828 |
22.34 |
| 2026-06-13 00:00 |
14:16:02.13 |
-20:08:41.7 |
HIP 69828 |
22.85 |
| 2026-06-13 12:00 |
14:15:58.94 |
-20:08:23.3 |
HIP 69828 |
23.37 |
| 2026-06-14 00:00 |
14:15:55.77 |
-20:08:04.9 |
HIP 69828 |
23.91 |
| 2026-06-14 12:00 |
14:15:52.62 |
-20:07:46.7 |
HIP 69828 |
24.45 |
| 2026-06-15 00:00 |
14:15:49.50 |
-20:07:28.5 |
HIP 69828 |
25.01 |
| 2026-06-15 12:00 |
14:15:46.41 |
-20:07:10.4 |
HIP 69828 |
25.57 |
| 2026-06-16 00:00 |
14:15:43.35 |
-20:06:52.5 |
HIP 69528 |
24.96 |
| 2026-06-16 12:00 |
14:15:40.31 |
-20:06:34.6 |
HIP 69528 |
24.33 |
| 2026-06-17 00:00 |
14:15:37.29 |
-20:06:16.7 |
HIP 69528 |
23.73 |
| 2026-06-17 12:00 |
14:15:34.31 |
-20:05:59.0 |
HIP 69528 |
23.13 |
| 2026-06-18 00:00 |
14:15:31.35 |
-20:05:41.4 |
HIP 69528 |
22.55 |
| 2026-06-18 12:00 |
14:15:28.42 |
-20:05:23.9 |
HIP 69528 |
21.99 |
| 2026-06-19 00:00 |
14:15:25.51 |
-20:05:06.4 |
HIP 69528 |
21.44 |
| 2026-06-19 12:00 |
14:15:22.63 |
-20:04:49.1 |
HIP 69528 |
20.92 |
| 2026-06-20 00:00 |
14:15:19.78 |
-20:04:31.9 |
HIP 69528 |
20.41 |
| 2026-06-20 12:00 |
14:15:16.96 |
-20:04:14.7 |
HIP 69528 |
19.91 |
| 2026-06-21 00:00 |
14:15:14.17 |
-20:03:57.7 |
HIP 69528 |
19.44 |
| 2026-06-21 12:00 |
14:15:11.40 |
-20:03:40.8 |
HIP 69528 |
18.99 |
| 2026-06-22 00:00 |
14:15:08.66 |
-20:03:23.9 |
HIP 69528 |
18.56 |