メタデータ
| 項目 |
値 |
| Designation |
C/2006 XA1 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2007-07-21T21:31:41.396160Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:03Z |
| Obs used |
486 |
| NEO |
- |
| M1 |
7.400 |
| K1 |
17.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2007-03-16.0000000 |
| e |
0.99283774 |
| q (au) |
1.804376 |
| a (au) |
251.928275 |
| i (deg) |
30.629404 |
| Ω (om, deg) |
318.663524 |
| ω (w, deg) |
187.418049 |
| M (ma, deg) |
359.968475 |
等級
散乱 + 全体線形
$$
M_a = (9.115 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
9.115 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.883 |
| 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 |
20:39:32.85 |
-27:08:00.2 |
HIP 102030 |
30.53 |
| 2026-03-26 12:00 |
20:39:34.83 |
-27:07:58.0 |
HIP 102030 |
30.36 |
| 2026-03-27 00:00 |
20:39:36.79 |
-27:07:56.0 |
HIP 102030 |
30.20 |
| 2026-03-27 12:00 |
20:39:38.72 |
-27:07:54.2 |
HIP 102030 |
30.05 |
| 2026-03-28 00:00 |
20:39:40.63 |
-27:07:52.4 |
HIP 102030 |
29.90 |
| 2026-03-28 12:00 |
20:39:42.52 |
-27:07:50.7 |
HIP 102030 |
29.76 |
| 2026-03-29 00:00 |
20:39:44.38 |
-27:07:49.2 |
HIP 102152 |
29.40 |
| 2026-03-29 12:00 |
20:39:46.21 |
-27:07:47.8 |
HIP 102152 |
29.00 |
| 2026-03-30 00:00 |
20:39:48.02 |
-27:07:46.5 |
HIP 102152 |
28.61 |
| 2026-03-30 12:00 |
20:39:49.81 |
-27:07:45.3 |
HIP 102152 |
28.22 |
| 2026-03-31 00:00 |
20:39:51.57 |
-27:07:44.3 |
HIP 102152 |
27.84 |
| 2026-03-31 12:00 |
20:39:53.30 |
-27:07:43.3 |
HIP 102152 |
27.46 |
| 2026-04-01 00:00 |
20:39:55.01 |
-27:07:42.5 |
HIP 102152 |
27.09 |
| 2026-04-01 12:00 |
20:39:56.69 |
-27:07:41.8 |
HIP 102152 |
26.73 |
| 2026-04-02 00:00 |
20:39:58.35 |
-27:07:41.2 |
HIP 102152 |
26.37 |
| 2026-04-02 12:00 |
20:39:59.98 |
-27:07:40.7 |
HIP 102152 |
26.02 |
| 2026-04-03 00:00 |
20:40:01.58 |
-27:07:40.4 |
HIP 102152 |
25.67 |
| 2026-04-03 12:00 |
20:40:03.16 |
-27:07:40.1 |
HIP 102152 |
25.33 |
| 2026-04-04 00:00 |
20:40:04.71 |
-27:07:40.0 |
HIP 102152 |
24.99 |
| 2026-04-04 12:00 |
20:40:06.24 |
-27:07:40.0 |
HIP 102152 |
24.66 |
| 2026-04-05 00:00 |
20:40:07.74 |
-27:07:40.1 |
HIP 102152 |
24.33 |
| 2026-04-05 12:00 |
20:40:09.21 |
-27:07:40.4 |
HIP 102152 |
24.01 |
| 2026-04-06 00:00 |
20:40:10.65 |
-27:07:40.7 |
HIP 102152 |
23.70 |
| 2026-04-06 12:00 |
20:40:12.07 |
-27:07:41.2 |
HIP 102152 |
23.39 |
| 2026-04-07 00:00 |
20:40:13.47 |
-27:07:41.8 |
HIP 102152 |
23.08 |
| 2026-04-07 12:00 |
20:40:14.83 |
-27:07:42.5 |
HIP 102152 |
22.78 |
| 2026-04-08 00:00 |
20:40:16.17 |
-27:07:43.3 |
HIP 102152 |
22.49 |
| 2026-04-08 12:00 |
20:40:17.48 |
-27:07:44.2 |
HIP 102152 |
22.20 |
| 2026-04-09 00:00 |
20:40:18.77 |
-27:07:45.3 |
HIP 102152 |
21.92 |
| 2026-04-09 12:00 |
20:40:20.02 |
-27:07:46.4 |
HIP 102152 |
21.65 |
| 2026-04-10 00:00 |
20:40:21.25 |
-27:07:47.7 |
HIP 102152 |
21.38 |
| 2026-04-10 12:00 |
20:40:22.45 |
-27:07:49.1 |
HIP 102152 |
21.11 |
| 2026-04-11 00:00 |
20:40:23.63 |
-27:07:50.6 |
HIP 102152 |
20.85 |
| 2026-04-11 12:00 |
20:40:24.78 |
-27:07:52.3 |
HIP 102152 |
20.60 |
| 2026-04-12 00:00 |
20:40:25.89 |
-27:07:54.0 |
HIP 102152 |
20.35 |
| 2026-04-12 12:00 |
20:40:26.99 |
-27:07:55.9 |
HIP 102152 |
20.11 |
| 2026-04-13 00:00 |
20:40:28.05 |
-27:07:57.9 |
HIP 102152 |
19.87 |
| 2026-04-13 12:00 |
20:40:29.08 |
-27:08:00.0 |
HIP 102152 |
19.64 |
| 2026-04-14 00:00 |
20:40:30.09 |
-27:08:02.2 |
HIP 102152 |
19.41 |
| 2026-04-14 12:00 |
20:40:31.07 |
-27:08:04.5 |
HIP 102152 |
19.19 |
| 2026-04-15 00:00 |
20:40:32.02 |
-27:08:06.9 |
HIP 102152 |
18.98 |
| 2026-04-15 12:00 |
20:40:32.94 |
-27:08:09.5 |
HIP 102152 |
18.77 |
| 2026-04-16 00:00 |
20:40:33.84 |
-27:08:12.2 |
HIP 102152 |
18.56 |