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) |
| 2026-09-20 00:00 |
11:42:32.34 |
-34:08:04.9 |
HIP 57170 |
19.10 |
| 2026-09-20 12:00 |
11:42:35.57 |
-34:08:19.2 |
HIP 57170 |
18.88 |
| 2026-09-21 00:00 |
11:42:38.80 |
-34:08:33.8 |
HIP 57170 |
18.69 |
| 2026-09-21 12:00 |
11:42:42.03 |
-34:08:48.6 |
HIP 57170 |
18.52 |
| 2026-09-22 00:00 |
11:42:45.25 |
-34:09:03.5 |
HIP 57170 |
18.39 |
| 2026-09-22 12:00 |
11:42:48.48 |
-34:09:18.7 |
HIP 57170 |
18.29 |
| 2026-09-23 00:00 |
11:42:51.70 |
-34:09:34.1 |
HIP 57170 |
18.22 |
| 2026-09-23 12:00 |
11:42:54.92 |
-34:09:49.7 |
HIP 57170 |
18.18 |
| 2026-09-24 00:00 |
11:42:58.14 |
-34:10:05.5 |
HIP 57170 |
18.17 |
| 2026-09-24 12:00 |
11:43:01.35 |
-34:10:21.5 |
HIP 57170 |
18.19 |
| 2026-09-25 00:00 |
11:43:04.56 |
-34:10:37.7 |
HIP 57170 |
18.25 |
| 2026-09-25 12:00 |
11:43:07.77 |
-34:10:54.0 |
HIP 57170 |
18.33 |
| 2026-09-26 00:00 |
11:43:10.98 |
-34:11:10.6 |
HIP 57170 |
18.45 |
| 2026-09-26 12:00 |
11:43:14.18 |
-34:11:27.4 |
HIP 57170 |
18.59 |
| 2026-09-27 00:00 |
11:43:17.38 |
-34:11:44.4 |
HIP 57170 |
18.77 |
| 2026-09-27 12:00 |
11:43:20.57 |
-34:12:01.5 |
HIP 57170 |
18.98 |
| 2026-09-28 00:00 |
11:43:23.76 |
-34:12:18.9 |
HIP 57170 |
19.21 |
| 2026-09-28 12:00 |
11:43:26.95 |
-34:12:36.4 |
HIP 57170 |
19.47 |
| 2026-09-29 00:00 |
11:43:30.13 |
-34:12:54.2 |
HIP 57149 |
19.44 |
| 2026-09-29 12:00 |
11:43:33.30 |
-34:13:12.1 |
HIP 57149 |
19.28 |
| 2026-09-30 00:00 |
11:43:36.47 |
-34:13:30.2 |
HIP 57149 |
19.13 |
| 2026-09-30 12:00 |
11:43:39.64 |
-34:13:48.5 |
HIP 57149 |
19.01 |
| 2026-10-01 00:00 |
11:43:42.80 |
-34:14:07.0 |
HIP 57149 |
18.92 |
| 2026-10-01 12:00 |
11:43:45.96 |
-34:14:25.7 |
HIP 57149 |
18.85 |
| 2026-10-02 00:00 |
11:43:49.10 |
-34:14:44.5 |
HIP 57149 |
18.80 |
| 2026-10-02 12:00 |
11:43:52.25 |
-34:15:03.5 |
HIP 57149 |
18.77 |
| 2026-10-03 00:00 |
11:43:55.38 |
-34:15:22.8 |
HIP 57149 |
18.77 |
| 2026-10-03 12:00 |
11:43:58.52 |
-34:15:42.2 |
HIP 57149 |
18.80 |
| 2026-10-04 00:00 |
11:44:01.64 |
-34:16:01.7 |
HIP 57149 |
18.85 |
| 2026-10-04 12:00 |
11:44:04.76 |
-34:16:21.5 |
HIP 57149 |
18.92 |
| 2026-10-05 00:00 |
11:44:07.87 |
-34:16:41.4 |
HIP 57149 |
19.02 |
| 2026-10-05 12:00 |
11:44:10.97 |
-34:17:01.5 |
HIP 57149 |
19.14 |
| 2026-10-06 00:00 |
11:44:14.06 |
-34:17:21.8 |
HIP 57149 |
19.28 |
| 2026-10-06 12:00 |
11:44:17.15 |
-34:17:42.3 |
HIP 57149 |
19.45 |
| 2026-10-07 00:00 |
11:44:20.23 |
-34:18:02.9 |
HIP 57149 |
19.64 |
| 2026-10-07 12:00 |
11:44:23.30 |
-34:18:23.7 |
HIP 57149 |
19.85 |
| 2026-10-08 00:00 |
11:44:26.36 |
-34:18:44.7 |
HIP 57149 |
20.08 |
| 2026-10-08 12:00 |
11:44:29.42 |
-34:19:05.8 |
HIP 57149 |
20.33 |
| 2026-10-09 00:00 |
11:44:32.46 |
-34:19:27.1 |
HIP 57149 |
20.59 |
| 2026-10-09 12:00 |
11:44:35.50 |
-34:19:48.6 |
HIP 57149 |
20.88 |
| 2026-10-10 00:00 |
11:44:38.52 |
-34:20:10.2 |
HIP 57149 |
21.19 |
| 2026-10-10 12:00 |
11:44:41.54 |
-34:20:32.0 |
HIP 57149 |
21.51 |
| 2026-10-11 00:00 |
11:44:44.55 |
-34:20:53.9 |
HIP 57149 |
21.84 |