メタデータ
| 項目 |
値 |
| Designation |
P/2011 Y2 (Boattini) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2012-03-21T16:42:15.212160Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:59Z |
| Obs used |
92 |
| NEO |
- |
| M1 |
13.600 |
| K1 |
16.250 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2011-12-28.0000000 |
| e |
0.71292045 |
| q (au) |
1.787148 |
| a (au) |
6.225270 |
| i (deg) |
6.351399 |
| Ω (om, deg) |
310.018388 |
| ω (w, deg) |
131.187614 |
| M (ma, deg) |
354.625603 |
等級
散乱 + 全体線形
$$
M_a = (13.174 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
13.174 |
| n |
6.000 |
| gf |
0.800 |
| gb |
-0.500 |
| k |
1.000 |
| δ90 |
5.312 |
| 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 |
22:27:09.85 |
-07:59:19.1 |
HIP 110792 |
31.84 |
| 2026-06-01 12:00 |
22:27:18.47 |
-07:58:00.4 |
HIP 110792 |
33.56 |
| 2026-06-02 00:00 |
22:27:26.92 |
-07:56:42.6 |
HIP 110792 |
35.35 |
| 2026-06-02 12:00 |
22:27:35.21 |
-07:55:25.6 |
HIP 110780 |
36.05 |
| 2026-06-03 00:00 |
22:27:43.33 |
-07:54:09.4 |
HIP 110780 |
35.81 |
| 2026-06-03 12:00 |
22:27:51.28 |
-07:52:54.1 |
HIP 110780 |
35.72 |
| 2026-06-04 00:00 |
22:27:59.07 |
-07:51:39.6 |
HIP 110780 |
35.77 |
| 2026-06-04 12:00 |
22:28:06.68 |
-07:50:25.9 |
HIP 110780 |
35.94 |
| 2026-06-05 00:00 |
22:28:14.12 |
-07:49:13.1 |
HIP 111111 |
34.75 |
| 2026-06-05 12:00 |
22:28:21.39 |
-07:48:01.2 |
HIP 111111 |
32.79 |
| 2026-06-06 00:00 |
22:28:28.49 |
-07:46:50.1 |
HIP 111111 |
30.89 |
| 2026-06-06 12:00 |
22:28:35.42 |
-07:45:40.0 |
HIP 111111 |
29.06 |
| 2026-06-07 00:00 |
22:28:42.17 |
-07:44:30.7 |
HIP 111111 |
27.32 |
| 2026-06-07 12:00 |
22:28:48.74 |
-07:43:22.3 |
HIP 111111 |
25.66 |
| 2026-06-08 00:00 |
22:28:55.13 |
-07:42:14.8 |
HIP 111111 |
24.10 |
| 2026-06-08 12:00 |
22:29:01.35 |
-07:41:08.2 |
HIP 111111 |
22.64 |
| 2026-06-09 00:00 |
22:29:07.39 |
-07:40:02.5 |
HIP 111111 |
21.29 |
| 2026-06-09 12:00 |
22:29:13.24 |
-07:38:57.8 |
HIP 111111 |
20.05 |
| 2026-06-10 00:00 |
22:29:18.92 |
-07:37:53.9 |
HIP 111111 |
18.95 |
| 2026-06-10 12:00 |
22:29:24.41 |
-07:36:51.1 |
HIP 111111 |
18.00 |
| 2026-06-11 00:00 |
22:29:29.72 |
-07:35:49.1 |
HIP 111111 |
17.19 |
| 2026-06-11 12:00 |
22:29:34.84 |
-07:34:48.1 |
HIP 111111 |
16.55 |
| 2026-06-12 00:00 |
22:29:39.78 |
-07:33:48.1 |
HIP 111111 |
16.08 |
| 2026-06-12 12:00 |
22:29:44.53 |
-07:32:49.1 |
HIP 111111 |
15.77 |
| 2026-06-13 00:00 |
22:29:49.09 |
-07:31:51.0 |
HIP 111111 |
15.63 |
| 2026-06-13 12:00 |
22:29:53.46 |
-07:30:53.9 |
HIP 111111 |
15.65 |
| 2026-06-14 00:00 |
22:29:57.64 |
-07:29:57.8 |
HIP 111111 |
15.81 |
| 2026-06-14 12:00 |
22:30:01.64 |
-07:29:02.7 |
HIP 111111 |
16.10 |
| 2026-06-15 00:00 |
22:30:05.44 |
-07:28:08.6 |
HIP 111111 |
16.49 |
| 2026-06-15 12:00 |
22:30:09.05 |
-07:27:15.4 |
HIP 111111 |
16.98 |
| 2026-06-16 00:00 |
22:30:12.46 |
-07:26:23.4 |
HIP 111111 |
17.55 |
| 2026-06-16 12:00 |
22:30:15.68 |
-07:25:32.3 |
HIP 111111 |
18.17 |
| 2026-06-17 00:00 |
22:30:18.71 |
-07:24:42.2 |
HIP 111111 |
18.83 |
| 2026-06-17 12:00 |
22:30:21.54 |
-07:23:53.2 |
HIP 111111 |
19.53 |
| 2026-06-18 00:00 |
22:30:24.17 |
-07:23:05.2 |
HIP 111111 |
20.25 |
| 2026-06-18 12:00 |
22:30:26.60 |
-07:22:18.2 |
HIP 111111 |
20.97 |
| 2026-06-19 00:00 |
22:30:28.84 |
-07:21:32.3 |
HIP 111111 |
21.71 |
| 2026-06-19 12:00 |
22:30:30.88 |
-07:20:47.5 |
HIP 111111 |
22.44 |
| 2026-06-20 00:00 |
22:30:32.73 |
-07:20:03.7 |
HIP 111111 |
23.17 |
| 2026-06-20 12:00 |
22:30:34.37 |
-07:19:20.9 |
HIP 111014 |
23.57 |
| 2026-06-21 00:00 |
22:30:35.81 |
-07:18:39.2 |
HIP 111014 |
23.37 |
| 2026-06-21 12:00 |
22:30:37.05 |
-07:17:58.6 |
HIP 111014 |
23.16 |
| 2026-06-22 00:00 |
22:30:38.09 |
-07:17:19.0 |
HIP 111014 |
22.95 |