メタデータ
| 項目 |
値 |
| Designation |
C/2004 F2 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2003-12-26T15:29:44.825280Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:38Z |
| Obs used |
144 |
| NEO |
- |
| M1 |
16.300 |
| 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) |
2004-05-04.0000000 |
| e |
0.99055864 |
| q (au) |
1.430438 |
| a (au) |
151.507608 |
| i (deg) |
104.959961 |
| Ω (om, deg) |
248.273455 |
| ω (w, deg) |
317.143157 |
| M (ma, deg) |
0.068365 |
等級
散乱 + 全体線形
$$
M_a = (17.356 + 3.043\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
17.356 |
| n |
3.043 |
| gf |
1.000 |
| gb |
-1.000 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
06:33:35.25 |
+82:23:32.0 |
HIP 32015 |
17.18 |
| 2026-03-26 12:00 |
06:33:33.60 |
+82:22:54.1 |
HIP 32015 |
16.97 |
| 2026-03-27 00:00 |
06:33:32.14 |
+82:22:16.2 |
HIP 32015 |
16.78 |
| 2026-03-27 12:00 |
06:33:30.87 |
+82:21:38.2 |
HIP 32015 |
16.61 |
| 2026-03-28 00:00 |
06:33:29.78 |
+82:21:00.3 |
HIP 32015 |
16.45 |
| 2026-03-28 12:00 |
06:33:28.88 |
+82:20:22.4 |
HIP 32015 |
16.32 |
| 2026-03-29 00:00 |
06:33:28.17 |
+82:19:44.4 |
HIP 32015 |
16.19 |
| 2026-03-29 12:00 |
06:33:27.64 |
+82:19:06.5 |
HIP 32015 |
16.09 |
| 2026-03-30 00:00 |
06:33:27.30 |
+82:18:28.6 |
HIP 32015 |
16.00 |
| 2026-03-30 12:00 |
06:33:27.13 |
+82:17:50.7 |
HIP 32015 |
15.94 |
| 2026-03-31 00:00 |
06:33:27.15 |
+82:17:12.8 |
HIP 32015 |
15.89 |
| 2026-03-31 12:00 |
06:33:27.35 |
+82:16:34.9 |
HIP 32015 |
15.86 |
| 2026-04-01 00:00 |
06:33:27.72 |
+82:15:57.0 |
HIP 32015 |
15.85 |
| 2026-04-01 12:00 |
06:33:28.28 |
+82:15:19.2 |
HIP 32015 |
15.86 |
| 2026-04-02 00:00 |
06:33:29.01 |
+82:14:41.3 |
HIP 32015 |
15.89 |
| 2026-04-02 12:00 |
06:33:29.92 |
+82:14:03.5 |
HIP 32015 |
15.93 |
| 2026-04-03 00:00 |
06:33:31.00 |
+82:13:25.7 |
HIP 32015 |
16.00 |
| 2026-04-03 12:00 |
06:33:32.26 |
+82:12:48.0 |
HIP 32015 |
16.08 |
| 2026-04-04 00:00 |
06:33:33.69 |
+82:12:10.3 |
HIP 32015 |
16.19 |
| 2026-04-04 12:00 |
06:33:35.29 |
+82:11:32.6 |
HIP 32015 |
16.31 |
| 2026-04-05 00:00 |
06:33:37.07 |
+82:10:54.9 |
HIP 32015 |
16.45 |
| 2026-04-05 12:00 |
06:33:39.02 |
+82:10:17.3 |
HIP 32015 |
16.60 |
| 2026-04-06 00:00 |
06:33:41.13 |
+82:09:39.7 |
HIP 32015 |
16.77 |
| 2026-04-06 12:00 |
06:33:43.42 |
+82:09:02.2 |
HIP 32015 |
16.96 |
| 2026-04-07 00:00 |
06:33:45.87 |
+82:08:24.7 |
HIP 32015 |
17.16 |
| 2026-04-07 12:00 |
06:33:48.49 |
+82:07:47.2 |
HIP 32015 |
17.38 |
| 2026-04-08 00:00 |
06:33:51.28 |
+82:07:09.8 |
HIP 32015 |
17.61 |
| 2026-04-08 12:00 |
06:33:54.23 |
+82:06:32.5 |
HIP 32015 |
17.86 |
| 2026-04-09 00:00 |
06:33:57.35 |
+82:05:55.2 |
HIP 32015 |
18.12 |
| 2026-04-09 12:00 |
06:34:00.63 |
+82:05:17.9 |
HIP 32015 |
18.39 |
| 2026-04-10 00:00 |
06:34:04.07 |
+82:04:40.8 |
HIP 32015 |
18.67 |
| 2026-04-10 12:00 |
06:34:07.68 |
+82:04:03.6 |
HIP 32015 |
18.97 |
| 2026-04-11 00:00 |
06:34:11.44 |
+82:03:26.6 |
HIP 32015 |
19.28 |
| 2026-04-11 12:00 |
06:34:15.36 |
+82:02:49.6 |
HIP 32015 |
19.59 |
| 2026-04-12 00:00 |
06:34:19.45 |
+82:02:12.7 |
HIP 32015 |
19.92 |
| 2026-04-12 12:00 |
06:34:23.69 |
+82:01:35.8 |
HIP 32015 |
20.26 |
| 2026-04-13 00:00 |
06:34:28.08 |
+82:00:59.0 |
HIP 32015 |
20.60 |
| 2026-04-13 12:00 |
06:34:32.64 |
+82:00:22.3 |
HIP 32015 |
20.96 |
| 2026-04-14 00:00 |
06:34:37.35 |
+81:59:45.7 |
HIP 32015 |
21.32 |
| 2026-04-14 12:00 |
06:34:42.21 |
+81:59:09.1 |
HIP 32015 |
21.69 |
| 2026-04-15 00:00 |
06:34:47.22 |
+81:58:32.7 |
HIP 32296 |
21.84 |
| 2026-04-15 12:00 |
06:34:52.39 |
+81:57:56.3 |
HIP 32296 |
21.93 |
| 2026-04-16 00:00 |
06:34:57.70 |
+81:57:20.0 |
HIP 32296 |
22.03 |