C/2007 F1 (LONEOS)
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
$$
M_a = (10.310 + 5.136\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
10.310 |
| n |
5.136 |
| 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 |
2007-08-20 |
-2.1746 |
+1.226 |
| 2007-08-20 |
2007-09-23 |
+9.3129 |
-0.742 |
| 2007-09-23 |
2007-10-03 |
+6.2543 |
-1.017 |
| 2007-10-03 |
2007-10-08 |
-23.5835 |
-4.678 |
| 2007-10-08 |
2007-10-12 |
+8.5086 |
+0.899 |
| 2007-10-12 |
2007-10-17 |
-23.6899 |
-6.555 |
| 2007-10-17 |
2007-10-28 |
-12.1262 |
-3.440 |
| 2007-11-03 |
2007-12-02 |
-8.8684 |
-1.514 |
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) |
| 2026-02-03 00:00 |
11:46:51.07 |
-36:05:08.2 |
HIP 57497 |
11.20 |
| 2026-02-03 12:00 |
11:46:48.43 |
-36:05:15.5 |
HIP 57497 |
11.48 |
| 2026-02-04 00:00 |
11:46:45.78 |
-36:05:22.6 |
HIP 57497 |
11.78 |
| 2026-02-04 12:00 |
11:46:43.10 |
-36:05:29.4 |
HIP 57497 |
12.09 |
| 2026-02-05 00:00 |
11:46:40.40 |
-36:05:36.0 |
HIP 57497 |
12.42 |
| 2026-02-05 12:00 |
11:46:37.68 |
-36:05:42.3 |
HIP 57497 |
12.76 |
| 2026-02-06 00:00 |
11:46:34.94 |
-36:05:48.3 |
HIP 57497 |
13.11 |
| 2026-02-06 12:00 |
11:46:32.18 |
-36:05:54.0 |
HIP 57497 |
13.48 |
| 2026-02-07 00:00 |
11:46:29.40 |
-36:05:59.4 |
HIP 57497 |
13.86 |
| 2026-02-07 12:00 |
11:46:26.60 |
-36:06:04.6 |
HIP 57497 |
14.25 |
| 2026-02-08 00:00 |
11:46:23.78 |
-36:06:09.5 |
HIP 57497 |
14.65 |
| 2026-02-08 12:00 |
11:46:20.94 |
-36:06:14.1 |
HIP 57497 |
15.06 |
| 2026-02-09 00:00 |
11:46:18.08 |
-36:06:18.4 |
HIP 57497 |
15.48 |
| 2026-02-09 12:00 |
11:46:15.20 |
-36:06:22.4 |
HIP 57497 |
15.91 |
| 2026-02-10 00:00 |
11:46:12.30 |
-36:06:26.2 |
HIP 57497 |
16.34 |
| 2026-02-10 12:00 |
11:46:09.39 |
-36:06:29.7 |
HIP 57497 |
16.79 |
| 2026-02-11 00:00 |
11:46:06.45 |
-36:06:32.8 |
HIP 57497 |
17.25 |
| 2026-02-11 12:00 |
11:46:03.50 |
-36:06:35.8 |
HIP 57497 |
17.71 |
| 2026-02-12 00:00 |
11:46:00.52 |
-36:06:38.4 |
HIP 57497 |
18.18 |
| 2026-02-12 12:00 |
11:45:57.53 |
-36:06:40.7 |
HIP 57497 |
18.66 |
| 2026-02-13 00:00 |
11:45:54.53 |
-36:06:42.8 |
HIP 57497 |
19.14 |
| 2026-02-13 12:00 |
11:45:51.50 |
-36:06:44.5 |
HIP 57497 |
19.63 |
| 2026-02-14 00:00 |
11:45:48.46 |
-36:06:46.0 |
HIP 57497 |
20.13 |
| 2026-02-14 12:00 |
11:45:45.40 |
-36:06:47.2 |
HIP 57497 |
20.63 |
| 2026-02-15 00:00 |
11:45:42.33 |
-36:06:48.1 |
HIP 57297 |
20.38 |
| 2026-02-15 12:00 |
11:45:39.23 |
-36:06:48.7 |
HIP 57297 |
20.07 |
| 2026-02-16 00:00 |
11:45:36.13 |
-36:06:49.0 |
HIP 57297 |
19.79 |
| 2026-02-16 12:00 |
11:45:33.00 |
-36:06:49.1 |
HIP 57297 |
19.52 |
| 2026-02-17 00:00 |
11:45:29.86 |
-36:06:48.8 |
HIP 57297 |
19.27 |
| 2026-02-17 12:00 |
11:45:26.71 |
-36:06:48.3 |
HIP 57297 |
19.04 |
| 2026-02-18 00:00 |
11:45:23.54 |
-36:06:47.5 |
HIP 57297 |
18.84 |
| 2026-02-18 12:00 |
11:45:20.36 |
-36:06:46.3 |
HIP 57297 |
18.65 |
| 2026-02-19 00:00 |
11:45:17.16 |
-36:06:44.9 |
HIP 57297 |
18.50 |
| 2026-02-19 12:00 |
11:45:13.94 |
-36:06:43.2 |
HIP 57297 |
18.36 |
| 2026-02-20 00:00 |
11:45:10.72 |
-36:06:41.2 |
HIP 57225 |
17.94 |
| 2026-02-20 12:00 |
11:45:07.48 |
-36:06:39.0 |
HIP 57225 |
17.47 |
| 2026-02-21 00:00 |
11:45:04.22 |
-36:06:36.4 |
HIP 57225 |
17.00 |
| 2026-02-21 12:00 |
11:45:00.96 |
-36:06:33.6 |
HIP 57225 |
16.55 |
| 2026-02-22 00:00 |
11:44:57.68 |
-36:06:30.4 |
HIP 57225 |
16.12 |
| 2026-02-22 12:00 |
11:44:54.39 |
-36:06:27.0 |
HIP 57225 |
15.70 |
| 2026-02-23 00:00 |
11:44:51.09 |
-36:06:23.3 |
HIP 57225 |
15.31 |
| 2026-02-23 12:00 |
11:44:47.77 |
-36:06:19.3 |
HIP 57225 |
14.94 |
| 2026-02-24 00:00 |
11:44:44.44 |
-36:06:15.0 |
HIP 57225 |
14.59 |