メタデータ
| 項目 |
値 |
| Designation |
C/2007 F1 (LONEOS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2007-10-28T18:14:50.939520Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:06Z |
| Obs used |
197 |
| NEO |
- |
| M1 |
10.800 |
| K1 |
11.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2007-06-09.0000000 |
| e |
1.00008815 |
| q (au) |
0.402375 |
| a (au) |
-4564.775911 |
| i (deg) |
116.082089 |
| Ω (om, deg) |
172.886668 |
| ω (w, deg) |
153.710777 |
| M (ma, deg) |
-0.000453 |
等級
散乱 + 全体線形
$$
M_a = (10.307 + 5.138\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
10.307 |
| n |
5.138 |
| gf |
0.800 |
| gb |
-0.500 |
| k |
0.800 |
| δ90 |
1.000 |
| 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 |
| 2007-03-19 |
2007-07-21 |
-2.6597 |
+1.473 |
| 2007-07-21 |
2007-10-03 |
+5.6634 |
-0.925 |
| 2007-10-03 |
2007-10-08 |
-17.3473 |
-3.750 |
| 2007-10-08 |
2007-10-16 |
-8.7238 |
-2.561 |
| 2007-10-16 |
2007-10-20 |
-2.9974 |
-0.624 |
| 2007-10-20 |
2007-10-28 |
-22.4377 |
-7.207 |
| 2007-11-03 |
2007-12-02 |
-8.8732 |
-1.511 |
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 |
11:35:53.67 |
-34:48:24.6 |
HIP 56567 |
1.64 |
| 2026-06-01 12:00 |
11:35:52.90 |
-34:47:53.5 |
HIP 56567 |
1.16 |
| 2026-06-02 00:00 |
11:35:52.15 |
-34:47:22.5 |
HIP 56567 |
0.79 |
| 2026-06-02 12:00 |
11:35:51.43 |
-34:46:51.6 |
HIP 56567 |
0.70 |
| 2026-06-03 00:00 |
11:35:50.75 |
-34:46:20.8 |
HIP 56567 |
0.96 |
| 2026-06-03 12:00 |
11:35:50.08 |
-34:45:50.0 |
HIP 56567 |
1.39 |
| 2026-06-04 00:00 |
11:35:49.45 |
-34:45:19.4 |
HIP 56567 |
1.87 |
| 2026-06-04 12:00 |
11:35:48.85 |
-34:44:48.8 |
HIP 56567 |
2.37 |
| 2026-06-05 00:00 |
11:35:48.27 |
-34:44:18.3 |
HIP 56567 |
2.87 |
| 2026-06-05 12:00 |
11:35:47.73 |
-34:43:47.9 |
HIP 56567 |
3.38 |
| 2026-06-06 00:00 |
11:35:47.21 |
-34:43:17.6 |
HIP 56567 |
3.89 |
| 2026-06-06 12:00 |
11:35:46.72 |
-34:42:47.4 |
HIP 56567 |
4.40 |
| 2026-06-07 00:00 |
11:35:46.26 |
-34:42:17.3 |
HIP 56567 |
4.91 |
| 2026-06-07 12:00 |
11:35:45.82 |
-34:41:47.3 |
HIP 56567 |
5.42 |
| 2026-06-08 00:00 |
11:35:45.42 |
-34:41:17.4 |
HIP 56567 |
5.92 |
| 2026-06-08 12:00 |
11:35:45.04 |
-34:40:47.6 |
HIP 56567 |
6.42 |
| 2026-06-09 00:00 |
11:35:44.69 |
-34:40:17.9 |
HIP 56567 |
6.92 |
| 2026-06-09 12:00 |
11:35:44.37 |
-34:39:48.3 |
HIP 56567 |
7.42 |
| 2026-06-10 00:00 |
11:35:44.08 |
-34:39:18.8 |
HIP 56567 |
7.92 |
| 2026-06-10 12:00 |
11:35:43.82 |
-34:38:49.5 |
HIP 56567 |
8.41 |
| 2026-06-11 00:00 |
11:35:43.59 |
-34:38:20.2 |
HIP 56567 |
8.90 |
| 2026-06-11 12:00 |
11:35:43.38 |
-34:37:51.1 |
HIP 56567 |
9.39 |
| 2026-06-12 00:00 |
11:35:43.21 |
-34:37:22.1 |
HIP 56567 |
9.87 |
| 2026-06-12 12:00 |
11:35:43.06 |
-34:36:53.2 |
HIP 56567 |
10.35 |
| 2026-06-13 00:00 |
11:35:42.94 |
-34:36:24.5 |
HIP 56567 |
10.83 |
| 2026-06-13 12:00 |
11:35:42.85 |
-34:35:55.8 |
HIP 56567 |
11.31 |
| 2026-06-14 00:00 |
11:35:42.78 |
-34:35:27.3 |
HIP 56623 |
11.77 |
| 2026-06-14 12:00 |
11:35:42.75 |
-34:34:58.9 |
HIP 56623 |
11.92 |
| 2026-06-15 00:00 |
11:35:42.74 |
-34:34:30.7 |
HIP 56623 |
12.08 |
| 2026-06-15 12:00 |
11:35:42.77 |
-34:34:02.6 |
HIP 56623 |
12.25 |
| 2026-06-16 00:00 |
11:35:42.82 |
-34:33:34.6 |
HIP 56623 |
12.43 |
| 2026-06-16 12:00 |
11:35:42.90 |
-34:33:06.8 |
HIP 56623 |
12.62 |
| 2026-06-17 00:00 |
11:35:43.01 |
-34:32:39.1 |
HIP 56623 |
12.81 |
| 2026-06-17 12:00 |
11:35:43.14 |
-34:32:11.5 |
HIP 56623 |
13.02 |
| 2026-06-18 00:00 |
11:35:43.31 |
-34:31:44.1 |
HIP 56623 |
13.23 |
| 2026-06-18 12:00 |
11:35:43.50 |
-34:31:16.8 |
HIP 56623 |
13.44 |
| 2026-06-19 00:00 |
11:35:43.72 |
-34:30:49.7 |
HIP 56623 |
13.66 |
| 2026-06-19 12:00 |
11:35:43.97 |
-34:30:22.7 |
HIP 56623 |
13.89 |
| 2026-06-20 00:00 |
11:35:44.25 |
-34:29:55.9 |
HIP 56623 |
14.12 |
| 2026-06-20 12:00 |
11:35:44.56 |
-34:29:29.2 |
HIP 56623 |
14.36 |
| 2026-06-21 00:00 |
11:35:44.89 |
-34:29:02.7 |
HIP 56623 |
14.60 |
| 2026-06-21 12:00 |
11:35:45.25 |
-34:28:36.4 |
HIP 56623 |
14.84 |
| 2026-06-22 00:00 |
11:35:45.64 |
-34:28:10.2 |
HIP 56623 |
15.09 |