メタデータ
| 項目 |
値 |
| Designation |
C/2011 F1 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2013-01-08T00:51:50.987520Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:49Z |
| Obs used |
4591 |
| NEO |
- |
| M1 |
10.300 |
| K1 |
4.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2012-03-17.0000000 |
| e |
1.00004254 |
| q (au) |
1.818879 |
| a (au) |
-42756.084905 |
| i (deg) |
56.610768 |
| Ω (om, deg) |
85.118907 |
| ω (w, deg) |
192.564919 |
| M (ma, deg) |
-0.000033 |
等級
散乱 + 全体線形
$$
M_a = (12.403 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
12.403 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.769 |
| 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 |
| 2011-03-17 |
2012-11-04 |
+1.2116 |
-0.969 |
| 2013-03-19 |
2014-08-07 |
+5.4983 |
-0.920 |
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 |
05:11:15.55 |
+10:03:37.0 |
HIP 24177 |
5.08 |
| 2026-07-29 12:00 |
05:11:18.23 |
+10:03:33.9 |
HIP 24177 |
4.69 |
| 2026-07-30 00:00 |
05:11:20.89 |
+10:03:30.7 |
HIP 24177 |
4.37 |
| 2026-07-30 12:00 |
05:11:23.52 |
+10:03:27.4 |
HIP 24177 |
4.13 |
| 2026-07-31 00:00 |
05:11:26.13 |
+10:03:24.0 |
HIP 24177 |
3.99 |
| 2026-07-31 12:00 |
05:11:28.72 |
+10:03:20.5 |
HIP 24177 |
3.96 |
| 2026-08-01 00:00 |
05:11:31.29 |
+10:03:16.9 |
HIP 24177 |
4.03 |
| 2026-08-01 12:00 |
05:11:33.83 |
+10:03:13.2 |
HIP 24177 |
4.19 |
| 2026-08-02 00:00 |
05:11:36.35 |
+10:03:09.4 |
HIP 24177 |
4.44 |
| 2026-08-02 12:00 |
05:11:38.84 |
+10:03:05.5 |
HIP 24177 |
4.76 |
| 2026-08-03 00:00 |
05:11:41.31 |
+10:03:01.5 |
HIP 24177 |
5.13 |
| 2026-08-03 12:00 |
05:11:43.75 |
+10:02:57.4 |
HIP 24177 |
5.54 |
| 2026-08-04 00:00 |
05:11:46.17 |
+10:02:53.2 |
HIP 24177 |
5.98 |
| 2026-08-04 12:00 |
05:11:48.57 |
+10:02:48.9 |
HIP 24177 |
6.44 |
| 2026-08-05 00:00 |
05:11:50.94 |
+10:02:44.5 |
HIP 24177 |
6.92 |
| 2026-08-05 12:00 |
05:11:53.28 |
+10:02:40.0 |
HIP 24177 |
7.41 |
| 2026-08-06 00:00 |
05:11:55.60 |
+10:02:35.4 |
HIP 24177 |
7.91 |
| 2026-08-06 12:00 |
05:11:57.90 |
+10:02:30.7 |
HIP 24177 |
8.42 |
| 2026-08-07 00:00 |
05:12:00.16 |
+10:02:25.9 |
HIP 24177 |
8.92 |
| 2026-08-07 12:00 |
05:12:02.41 |
+10:02:21.0 |
HIP 24177 |
9.43 |
| 2026-08-08 00:00 |
05:12:04.62 |
+10:02:16.0 |
HIP 24177 |
9.94 |
| 2026-08-08 12:00 |
05:12:06.81 |
+10:02:10.9 |
HIP 24177 |
10.45 |
| 2026-08-09 00:00 |
05:12:08.98 |
+10:02:05.7 |
HIP 24177 |
10.96 |
| 2026-08-09 12:00 |
05:12:11.11 |
+10:02:00.5 |
HIP 24177 |
11.47 |
| 2026-08-10 00:00 |
05:12:13.22 |
+10:01:55.1 |
HIP 24177 |
11.97 |
| 2026-08-10 12:00 |
05:12:15.31 |
+10:01:49.7 |
HIP 24177 |
12.47 |
| 2026-08-11 00:00 |
05:12:17.36 |
+10:01:44.1 |
HIP 24177 |
12.97 |
| 2026-08-11 12:00 |
05:12:19.39 |
+10:01:38.5 |
HIP 24177 |
13.46 |
| 2026-08-12 00:00 |
05:12:21.39 |
+10:01:32.7 |
HIP 24177 |
13.95 |
| 2026-08-12 12:00 |
05:12:23.36 |
+10:01:26.9 |
HIP 24177 |
14.43 |
| 2026-08-13 00:00 |
05:12:25.31 |
+10:01:21.0 |
HIP 24177 |
14.91 |
| 2026-08-13 12:00 |
05:12:27.23 |
+10:01:15.0 |
HIP 24177 |
15.38 |
| 2026-08-14 00:00 |
05:12:29.11 |
+10:01:08.9 |
HIP 24177 |
15.85 |
| 2026-08-14 12:00 |
05:12:30.97 |
+10:01:02.7 |
HIP 24177 |
16.31 |
| 2026-08-15 00:00 |
05:12:32.81 |
+10:00:56.4 |
HIP 24177 |
16.77 |
| 2026-08-15 12:00 |
05:12:34.61 |
+10:00:50.1 |
HIP 24177 |
17.22 |
| 2026-08-16 00:00 |
05:12:36.38 |
+10:00:43.6 |
HIP 24177 |
17.66 |
| 2026-08-16 12:00 |
05:12:38.13 |
+10:00:37.1 |
HIP 24177 |
18.10 |
| 2026-08-17 00:00 |
05:12:39.85 |
+10:00:30.5 |
HIP 24177 |
18.54 |
| 2026-08-17 12:00 |
05:12:41.53 |
+10:00:23.8 |
HIP 24177 |
18.97 |
| 2026-08-18 00:00 |
05:12:43.19 |
+10:00:17.0 |
HIP 24177 |
19.39 |
| 2026-08-18 12:00 |
05:12:44.82 |
+10:00:10.1 |
HIP 24177 |
19.80 |
| 2026-08-19 00:00 |
05:12:46.42 |
+10:00:03.2 |
HIP 24177 |
20.21 |