メタデータ
| 項目 |
値 |
| Designation |
C/2006 F2 (Christensen) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2006-03-30T10:14:20.296320Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:56Z |
| Obs used |
60 |
| NEO |
- |
| M1 |
10.600 |
| K1 |
10.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2006-03-31.0000000 |
| e |
0.65137027 |
| q (au) |
4.296452 |
| a (au) |
12.323827 |
| i (deg) |
20.511217 |
| Ω (om, deg) |
8.260719 |
| ω (w, deg) |
181.011341 |
| M (ma, deg) |
0.013062 |
等級
散乱 + 全体線形
$$
M_a = (13.117 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
13.117 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.982 |
| k |
1.000 |
| 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) |
| 2026-09-25 00:00 |
00:25:24.17 |
+02:13:56.7 |
HIP 2030 |
7.28 |
| 2026-09-25 12:00 |
00:25:19.19 |
+02:13:29.0 |
HIP 2030 |
8.49 |
| 2026-09-26 00:00 |
00:25:14.20 |
+02:13:01.3 |
HIP 2030 |
9.72 |
| 2026-09-26 12:00 |
00:25:09.21 |
+02:12:33.6 |
HIP 2030 |
10.98 |
| 2026-09-27 00:00 |
00:25:04.22 |
+02:12:05.9 |
HIP 2030 |
12.25 |
| 2026-09-27 12:00 |
00:24:59.22 |
+02:11:38.2 |
HIP 2030 |
13.54 |
| 2026-09-28 00:00 |
00:24:54.22 |
+02:11:10.4 |
HIP 2030 |
14.83 |
| 2026-09-28 12:00 |
00:24:49.22 |
+02:10:42.7 |
HIP 2030 |
16.13 |
| 2026-09-29 00:00 |
00:24:44.22 |
+02:10:14.9 |
HIP 2006 |
17.09 |
| 2026-09-29 12:00 |
00:24:39.22 |
+02:09:47.1 |
HIP 2006 |
17.49 |
| 2026-09-30 00:00 |
00:24:34.21 |
+02:09:19.4 |
HIP 2006 |
17.99 |
| 2026-09-30 12:00 |
00:24:29.21 |
+02:08:51.6 |
HIP 2006 |
18.56 |
| 2026-10-01 00:00 |
00:24:24.21 |
+02:08:23.9 |
HIP 2006 |
19.21 |
| 2026-10-01 12:00 |
00:24:19.20 |
+02:07:56.1 |
HIP 2006 |
19.93 |
| 2026-10-02 00:00 |
00:24:14.20 |
+02:07:28.4 |
HIP 2006 |
20.71 |
| 2026-10-02 12:00 |
00:24:09.20 |
+02:07:00.7 |
HIP 2006 |
21.55 |
| 2026-10-03 00:00 |
00:24:04.21 |
+02:06:33.0 |
HIP 2006 |
22.43 |
| 2026-10-03 12:00 |
00:23:59.21 |
+02:06:05.3 |
HIP 2006 |
23.35 |
| 2026-10-04 00:00 |
00:23:54.22 |
+02:05:37.7 |
HIP 2006 |
24.31 |
| 2026-10-04 12:00 |
00:23:49.23 |
+02:05:10.0 |
HIP 1783 |
23.26 |
| 2026-10-05 00:00 |
00:23:44.24 |
+02:04:42.5 |
HIP 1783 |
22.04 |
| 2026-10-05 12:00 |
00:23:39.26 |
+02:04:14.9 |
HIP 1783 |
20.83 |
| 2026-10-06 00:00 |
00:23:34.29 |
+02:03:47.4 |
HIP 1783 |
19.64 |
| 2026-10-06 12:00 |
00:23:29.32 |
+02:03:19.9 |
HIP 1783 |
18.47 |
| 2026-10-07 00:00 |
00:23:24.35 |
+02:02:52.4 |
HIP 1783 |
17.32 |
| 2026-10-07 12:00 |
00:23:19.40 |
+02:02:25.0 |
HIP 1783 |
16.20 |
| 2026-10-08 00:00 |
00:23:14.45 |
+02:01:57.7 |
HIP 1783 |
15.12 |
| 2026-10-08 12:00 |
00:23:09.50 |
+02:01:30.4 |
HIP 1783 |
14.07 |
| 2026-10-09 00:00 |
00:23:04.57 |
+02:01:03.2 |
HIP 1783 |
13.08 |
| 2026-10-09 12:00 |
00:22:59.64 |
+02:00:36.0 |
HIP 1783 |
12.15 |
| 2026-10-10 00:00 |
00:22:54.72 |
+02:00:08.9 |
HIP 1783 |
11.29 |
| 2026-10-10 12:00 |
00:22:49.81 |
+01:59:41.8 |
HIP 1783 |
10.53 |
| 2026-10-11 00:00 |
00:22:44.91 |
+01:59:14.8 |
HIP 1783 |
9.89 |
| 2026-10-11 12:00 |
00:22:40.03 |
+01:58:47.9 |
HIP 1783 |
9.39 |
| 2026-10-12 00:00 |
00:22:35.15 |
+01:58:21.1 |
HIP 1783 |
9.05 |
| 2026-10-12 12:00 |
00:22:30.28 |
+01:57:54.3 |
HIP 1783 |
8.89 |
| 2026-10-13 00:00 |
00:22:25.43 |
+01:57:27.7 |
HIP 1783 |
8.91 |
| 2026-10-13 12:00 |
00:22:20.58 |
+01:57:01.1 |
HIP 1783 |
9.12 |
| 2026-10-14 00:00 |
00:22:15.75 |
+01:56:34.6 |
HIP 1783 |
9.50 |
| 2026-10-14 12:00 |
00:22:10.94 |
+01:56:08.1 |
HIP 1783 |
10.03 |
| 2026-10-15 00:00 |
00:22:06.14 |
+01:55:41.8 |
HIP 1783 |
10.69 |
| 2026-10-15 12:00 |
00:22:01.35 |
+01:55:15.6 |
HIP 1783 |
11.45 |
| 2026-10-16 00:00 |
00:21:56.57 |
+01:54:49.5 |
HIP 1783 |
12.29 |