メタデータ
| 項目 |
値 |
| Designation |
P/2011 JB15 (Spacewatch-Boattini) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2012-01-21T16:06:25.079040Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:49Z |
| Obs used |
120 |
| NEO |
- |
| M1 |
6.900 |
| K1 |
13.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2011-06-09.0000000 |
| e |
0.31873584 |
| q (au) |
5.018710 |
| a (au) |
7.366761 |
| i (deg) |
19.141273 |
| Ω (om, deg) |
153.768180 |
| ω (w, deg) |
110.926709 |
| M (ma, deg) |
348.826598 |
等級
散乱 + 全体線形
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 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 |
08:32:15.24 |
+12:07:19.8 |
HIP 41790 |
21.75 |
| 2026-06-01 12:00 |
08:32:26.51 |
+12:07:15.8 |
HIP 41790 |
23.65 |
| 2026-06-02 00:00 |
08:32:37.85 |
+12:07:11.2 |
HIP 41790 |
25.72 |
| 2026-06-02 12:00 |
08:32:49.26 |
+12:07:06.2 |
HIP 41790 |
27.92 |
| 2026-06-03 00:00 |
08:33:00.74 |
+12:07:00.7 |
HIP 41790 |
30.23 |
| 2026-06-03 12:00 |
08:33:12.30 |
+12:06:54.8 |
HIP 41790 |
32.63 |
| 2026-06-04 00:00 |
08:33:23.93 |
+12:06:48.4 |
HIP 41790 |
35.11 |
| 2026-06-04 12:00 |
08:33:35.63 |
+12:06:41.6 |
HIP 41790 |
37.65 |
| 2026-06-05 00:00 |
08:33:47.41 |
+12:06:34.3 |
HIP 41790 |
40.25 |
| 2026-06-05 12:00 |
08:33:59.25 |
+12:06:26.5 |
HIP 41790 |
42.90 |
| 2026-06-06 00:00 |
08:34:11.16 |
+12:06:18.3 |
HIP 42222 |
41.92 |
| 2026-06-06 12:00 |
08:34:23.14 |
+12:06:09.6 |
HIP 42222 |
39.47 |
| 2026-06-07 00:00 |
08:34:35.19 |
+12:06:00.5 |
HIP 42222 |
37.07 |
| 2026-06-07 12:00 |
08:34:47.31 |
+12:05:50.9 |
HIP 42222 |
34.74 |
| 2026-06-08 00:00 |
08:34:59.50 |
+12:05:40.9 |
HIP 42222 |
32.50 |
| 2026-06-08 12:00 |
08:35:11.75 |
+12:05:30.4 |
HIP 42222 |
30.37 |
| 2026-06-09 00:00 |
08:35:24.07 |
+12:05:19.5 |
HIP 42222 |
28.38 |
| 2026-06-09 12:00 |
08:35:36.46 |
+12:05:08.1 |
HIP 42222 |
26.57 |
| 2026-06-10 00:00 |
08:35:48.91 |
+12:04:56.3 |
HIP 42222 |
24.99 |
| 2026-06-10 12:00 |
08:36:01.43 |
+12:04:44.0 |
HIP 42222 |
23.68 |
| 2026-06-11 00:00 |
08:36:14.02 |
+12:04:31.3 |
HIP 42222 |
22.71 |
| 2026-06-11 12:00 |
08:36:26.66 |
+12:04:18.1 |
HIP 42222 |
22.12 |
| 2026-06-12 00:00 |
08:36:39.37 |
+12:04:04.5 |
HIP 42222 |
21.95 |
| 2026-06-12 12:00 |
08:36:52.15 |
+12:03:50.4 |
HIP 42222 |
22.21 |
| 2026-06-13 00:00 |
08:37:04.98 |
+12:03:35.9 |
HIP 42222 |
22.91 |
| 2026-06-13 12:00 |
08:37:17.88 |
+12:03:21.0 |
HIP 42222 |
24.00 |
| 2026-06-14 00:00 |
08:37:30.84 |
+12:03:05.6 |
HIP 42222 |
25.45 |
| 2026-06-14 12:00 |
08:37:43.86 |
+12:02:49.7 |
HIP 42222 |
27.19 |
| 2026-06-15 00:00 |
08:37:56.94 |
+12:02:33.5 |
HIP 42375 |
27.56 |
| 2026-06-15 12:00 |
08:38:10.08 |
+12:02:16.8 |
HIP 42375 |
27.23 |
| 2026-06-16 00:00 |
08:38:23.28 |
+12:01:59.6 |
HIP 42375 |
27.28 |
| 2026-06-16 12:00 |
08:38:36.53 |
+12:01:42.0 |
HIP 42375 |
27.72 |
| 2026-06-17 00:00 |
08:38:49.85 |
+12:01:24.0 |
HIP 42375 |
28.54 |
| 2026-06-17 12:00 |
08:39:03.22 |
+12:01:05.6 |
HIP 42375 |
29.71 |
| 2026-06-18 00:00 |
08:39:16.64 |
+12:00:46.7 |
HIP 42499 |
30.52 |
| 2026-06-18 12:00 |
08:39:30.12 |
+12:00:27.4 |
HIP 42499 |
29.46 |
| 2026-06-19 00:00 |
08:39:43.66 |
+12:00:07.7 |
HIP 42499 |
28.75 |
| 2026-06-19 12:00 |
08:39:57.25 |
+11:59:47.6 |
HIP 42660 |
27.60 |
| 2026-06-20 00:00 |
08:40:10.89 |
+11:59:27.0 |
HIP 42660 |
24.72 |
| 2026-06-20 12:00 |
08:40:24.59 |
+11:59:06.0 |
HIP 42660 |
21.96 |
| 2026-06-21 00:00 |
08:40:38.34 |
+11:58:44.6 |
HIP 42660 |
19.39 |
| 2026-06-21 12:00 |
08:40:52.14 |
+11:58:22.8 |
HIP 42660 |
17.09 |
| 2026-06-22 00:00 |
08:41:05.99 |
+11:58:00.6 |
HIP 42660 |
15.21 |