メタデータ
| 項目 |
値 |
| Designation |
C/2006 OF2 (Broughton) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2008-09-15T16:27:21.395520Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:59Z |
| Obs used |
4756 |
| NEO |
- |
| M1 |
9.600 |
| K1 |
5.250 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2008-07-16.0000000 |
| e |
1.00078340 |
| q (au) |
2.431442 |
| a (au) |
-3103.701825 |
| i (deg) |
30.170433 |
| Ω (om, deg) |
318.508724 |
| ω (w, deg) |
95.611765 |
| M (ma, deg) |
-0.000352 |
等級
散乱 + 全体線形
$$
M_a = (7.286 + 3.919\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
7.286 |
| n |
3.919 |
| gf |
1.000 |
| gb |
-0.703 |
| k |
0.800 |
| δ90 |
10.000 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 2007-08-05 |
2008-09-10 |
-1.1552 |
+1.003 |
| 2008-09-22 |
2009-01-13 |
-12.3341 |
+5.132 |
| 2009-01-13 |
2011-01-09 |
+4.4199 |
-2.467 |
log10 r = log10(太陽距離/AU)、Δ = 地球距離(AU)
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
12:22:31.42 |
-32:45:53.4 |
HIP 60594 |
38.92 |
| 2026-06-01 12:00 |
12:22:30.03 |
-32:45:25.6 |
HIP 60102 |
38.77 |
| 2026-06-02 00:00 |
12:22:28.68 |
-32:44:57.9 |
HIP 60102 |
38.38 |
| 2026-06-02 12:00 |
12:22:27.35 |
-32:44:30.2 |
HIP 60102 |
38.00 |
| 2026-06-03 00:00 |
12:22:26.06 |
-32:44:02.6 |
HIP 60102 |
37.63 |
| 2026-06-03 12:00 |
12:22:24.79 |
-32:43:35.1 |
HIP 60102 |
37.26 |
| 2026-06-04 00:00 |
12:22:23.55 |
-32:43:07.6 |
HIP 60102 |
36.91 |
| 2026-06-04 12:00 |
12:22:22.34 |
-32:42:40.1 |
HIP 60102 |
36.57 |
| 2026-06-05 00:00 |
12:22:21.15 |
-32:42:12.7 |
HIP 60102 |
36.24 |
| 2026-06-05 12:00 |
12:22:20.00 |
-32:41:45.4 |
HIP 60102 |
35.91 |
| 2026-06-06 00:00 |
12:22:18.87 |
-32:41:18.2 |
HIP 60102 |
35.60 |
| 2026-06-06 12:00 |
12:22:17.78 |
-32:40:51.0 |
HIP 60102 |
35.30 |
| 2026-06-07 00:00 |
12:22:16.71 |
-32:40:23.9 |
HIP 60102 |
35.02 |
| 2026-06-07 12:00 |
12:22:15.67 |
-32:39:56.8 |
HIP 60102 |
34.74 |
| 2026-06-08 00:00 |
12:22:14.66 |
-32:39:29.9 |
HIP 60102 |
34.47 |
| 2026-06-08 12:00 |
12:22:13.68 |
-32:39:03.0 |
HIP 60102 |
34.22 |
| 2026-06-09 00:00 |
12:22:12.73 |
-32:38:36.1 |
HIP 60102 |
33.97 |
| 2026-06-09 12:00 |
12:22:11.81 |
-32:38:09.4 |
HIP 60102 |
33.74 |
| 2026-06-10 00:00 |
12:22:10.92 |
-32:37:42.8 |
HIP 60102 |
33.52 |
| 2026-06-10 12:00 |
12:22:10.05 |
-32:37:16.2 |
HIP 60102 |
33.31 |
| 2026-06-11 00:00 |
12:22:09.22 |
-32:36:49.7 |
HIP 60102 |
33.12 |
| 2026-06-11 12:00 |
12:22:08.42 |
-32:36:23.3 |
HIP 60102 |
32.93 |
| 2026-06-12 00:00 |
12:22:07.64 |
-32:35:57.0 |
HIP 60102 |
32.76 |
| 2026-06-12 12:00 |
12:22:06.90 |
-32:35:30.8 |
HIP 60102 |
32.60 |
| 2026-06-13 00:00 |
12:22:06.18 |
-32:35:04.7 |
HIP 60102 |
32.45 |
| 2026-06-13 12:00 |
12:22:05.50 |
-32:34:38.7 |
HIP 60102 |
32.31 |
| 2026-06-14 00:00 |
12:22:04.84 |
-32:34:12.8 |
HIP 60102 |
32.19 |
| 2026-06-14 12:00 |
12:22:04.22 |
-32:33:47.0 |
HIP 60102 |
32.07 |
| 2026-06-15 00:00 |
12:22:03.62 |
-32:33:21.3 |
HIP 60102 |
31.97 |
| 2026-06-15 12:00 |
12:22:03.06 |
-32:32:55.7 |
HIP 60102 |
31.89 |
| 2026-06-16 00:00 |
12:22:02.52 |
-32:32:30.2 |
HIP 60102 |
31.81 |
| 2026-06-16 12:00 |
12:22:02.02 |
-32:32:04.8 |
HIP 60102 |
31.74 |
| 2026-06-17 00:00 |
12:22:01.54 |
-32:31:39.6 |
HIP 60102 |
31.69 |
| 2026-06-17 12:00 |
12:22:01.09 |
-32:31:14.4 |
HIP 60102 |
31.65 |
| 2026-06-18 00:00 |
12:22:00.68 |
-32:30:49.4 |
HIP 60102 |
31.62 |
| 2026-06-18 12:00 |
12:22:00.29 |
-32:30:24.5 |
HIP 60102 |
31.61 |
| 2026-06-19 00:00 |
12:21:59.94 |
-32:29:59.7 |
HIP 60102 |
31.60 |
| 2026-06-19 12:00 |
12:21:59.61 |
-32:29:35.0 |
HIP 60102 |
31.61 |
| 2026-06-20 00:00 |
12:21:59.32 |
-32:29:10.5 |
HIP 60102 |
31.62 |
| 2026-06-20 12:00 |
12:21:59.05 |
-32:28:46.1 |
HIP 60102 |
31.65 |
| 2026-06-21 00:00 |
12:21:58.82 |
-32:28:21.8 |
HIP 60317 |
31.63 |
| 2026-06-21 12:00 |
12:21:58.61 |
-32:27:57.6 |
HIP 60317 |
31.23 |
| 2026-06-22 00:00 |
12:21:58.44 |
-32:27:33.6 |
HIP 60317 |
30.83 |