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) |
| 2026-07-29 00:00 |
11:37:25.41 |
-34:04:42.0 |
HIP 56783 |
16.14 |
| 2026-07-29 12:00 |
11:37:27.62 |
-34:04:31.2 |
HIP 56783 |
15.86 |
| 2026-07-30 00:00 |
11:37:29.84 |
-34:04:20.6 |
HIP 56783 |
15.59 |
| 2026-07-30 12:00 |
11:37:32.08 |
-34:04:10.3 |
HIP 56783 |
15.32 |
| 2026-07-31 00:00 |
11:37:34.34 |
-34:04:00.2 |
HIP 56783 |
15.06 |
| 2026-07-31 12:00 |
11:37:36.62 |
-34:03:50.3 |
HIP 56783 |
14.81 |
| 2026-08-01 00:00 |
11:37:38.92 |
-34:03:40.7 |
HIP 56783 |
14.56 |
| 2026-08-01 12:00 |
11:37:41.23 |
-34:03:31.3 |
HIP 56783 |
14.32 |
| 2026-08-02 00:00 |
11:37:43.57 |
-34:03:22.2 |
HIP 56783 |
14.09 |
| 2026-08-02 12:00 |
11:37:45.92 |
-34:03:13.3 |
HIP 56783 |
13.87 |
| 2026-08-03 00:00 |
11:37:48.29 |
-34:03:04.6 |
HIP 56783 |
13.66 |
| 2026-08-03 12:00 |
11:37:50.68 |
-34:02:56.2 |
HIP 56783 |
13.45 |
| 2026-08-04 00:00 |
11:37:53.08 |
-34:02:48.0 |
HIP 56783 |
13.26 |
| 2026-08-04 12:00 |
11:37:55.51 |
-34:02:40.1 |
HIP 56783 |
13.09 |
| 2026-08-05 00:00 |
11:37:57.95 |
-34:02:32.4 |
HIP 56783 |
12.92 |
| 2026-08-05 12:00 |
11:38:00.41 |
-34:02:25.0 |
HIP 56783 |
12.77 |
| 2026-08-06 00:00 |
11:38:02.89 |
-34:02:17.8 |
HIP 56783 |
12.63 |
| 2026-08-06 12:00 |
11:38:05.38 |
-34:02:10.8 |
HIP 56783 |
12.51 |
| 2026-08-07 00:00 |
11:38:07.89 |
-34:02:04.1 |
HIP 56783 |
12.41 |
| 2026-08-07 12:00 |
11:38:10.41 |
-34:01:57.6 |
HIP 56783 |
12.32 |
| 2026-08-08 00:00 |
11:38:12.96 |
-34:01:51.4 |
HIP 56783 |
12.25 |
| 2026-08-08 12:00 |
11:38:15.52 |
-34:01:45.5 |
HIP 56783 |
12.20 |
| 2026-08-09 00:00 |
11:38:18.09 |
-34:01:39.7 |
HIP 56783 |
12.17 |
| 2026-08-09 12:00 |
11:38:20.69 |
-34:01:34.2 |
HIP 56783 |
12.15 |
| 2026-08-10 00:00 |
11:38:23.29 |
-34:01:29.0 |
HIP 56783 |
12.16 |
| 2026-08-10 12:00 |
11:38:25.92 |
-34:01:24.0 |
HIP 56783 |
12.19 |
| 2026-08-11 00:00 |
11:38:28.55 |
-34:01:19.3 |
HIP 56783 |
12.23 |
| 2026-08-11 12:00 |
11:38:31.21 |
-34:01:14.8 |
HIP 56783 |
12.30 |
| 2026-08-12 00:00 |
11:38:33.88 |
-34:01:10.6 |
HIP 56783 |
12.39 |
| 2026-08-12 12:00 |
11:38:36.56 |
-34:01:06.6 |
HIP 56783 |
12.50 |
| 2026-08-13 00:00 |
11:38:39.26 |
-34:01:02.8 |
HIP 56783 |
12.63 |
| 2026-08-13 12:00 |
11:38:41.97 |
-34:00:59.3 |
HIP 56783 |
12.77 |
| 2026-08-14 00:00 |
11:38:44.70 |
-34:00:56.1 |
HIP 56783 |
12.94 |
| 2026-08-14 12:00 |
11:38:47.44 |
-34:00:53.1 |
HIP 56783 |
13.13 |
| 2026-08-15 00:00 |
11:38:50.20 |
-34:00:50.4 |
HIP 56783 |
13.33 |
| 2026-08-15 12:00 |
11:38:52.97 |
-34:00:47.9 |
HIP 56783 |
13.56 |
| 2026-08-16 00:00 |
11:38:55.75 |
-34:00:45.6 |
HIP 56783 |
13.80 |
| 2026-08-16 12:00 |
11:38:58.55 |
-34:00:43.6 |
HIP 56783 |
14.06 |
| 2026-08-17 00:00 |
11:39:01.36 |
-34:00:41.8 |
HIP 56783 |
14.33 |
| 2026-08-17 12:00 |
11:39:04.18 |
-34:00:40.3 |
HIP 56783 |
14.62 |
| 2026-08-18 00:00 |
11:39:07.01 |
-34:00:39.1 |
HIP 56783 |
14.93 |
| 2026-08-18 12:00 |
11:39:09.86 |
-34:00:38.1 |
HIP 56783 |
15.25 |
| 2026-08-19 00:00 |
11:39:12.72 |
-34:00:37.3 |
HIP 56783 |
15.58 |