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) |
| 2026-07-29 00:00 |
20:34:30.12 |
-27:42:00.6 |
HIP 101610 |
21.92 |
| 2026-07-29 12:00 |
20:34:26.77 |
-27:42:10.5 |
HIP 101610 |
22.27 |
| 2026-07-30 00:00 |
20:34:23.42 |
-27:42:20.4 |
HIP 101610 |
22.64 |
| 2026-07-30 12:00 |
20:34:20.08 |
-27:42:30.3 |
HIP 101610 |
23.04 |
| 2026-07-31 00:00 |
20:34:16.73 |
-27:42:40.0 |
HIP 101610 |
23.45 |
| 2026-07-31 12:00 |
20:34:13.38 |
-27:42:49.7 |
HIP 101610 |
23.88 |
| 2026-08-01 00:00 |
20:34:10.03 |
-27:42:59.3 |
HIP 101610 |
24.33 |
| 2026-08-01 12:00 |
20:34:06.69 |
-27:43:08.9 |
HIP 101610 |
24.79 |
| 2026-08-02 00:00 |
20:34:03.34 |
-27:43:18.3 |
HIP 101610 |
25.26 |
| 2026-08-02 12:00 |
20:34:00.00 |
-27:43:27.7 |
HIP 101610 |
25.75 |
| 2026-08-03 00:00 |
20:33:56.66 |
-27:43:37.0 |
HIP 101610 |
26.26 |
| 2026-08-03 12:00 |
20:33:53.32 |
-27:43:46.3 |
HIP 101610 |
26.77 |
| 2026-08-04 00:00 |
20:33:49.99 |
-27:43:55.4 |
HIP 101610 |
27.30 |
| 2026-08-04 12:00 |
20:33:46.66 |
-27:44:04.5 |
HIP 101610 |
27.84 |
| 2026-08-05 00:00 |
20:33:43.33 |
-27:44:13.5 |
HIP 101610 |
28.38 |
| 2026-08-05 12:00 |
20:33:40.01 |
-27:44:22.5 |
HIP 101610 |
28.94 |
| 2026-08-06 00:00 |
20:33:36.68 |
-27:44:31.3 |
HIP 101250 |
29.22 |
| 2026-08-06 12:00 |
20:33:33.37 |
-27:44:40.1 |
HIP 101250 |
28.48 |
| 2026-08-07 00:00 |
20:33:30.05 |
-27:44:48.8 |
HIP 101250 |
27.75 |
| 2026-08-07 12:00 |
20:33:26.74 |
-27:44:57.4 |
HIP 101250 |
27.01 |
| 2026-08-08 00:00 |
20:33:23.44 |
-27:45:05.9 |
HIP 101250 |
26.28 |
| 2026-08-08 12:00 |
20:33:20.14 |
-27:45:14.3 |
HIP 101250 |
25.55 |
| 2026-08-09 00:00 |
20:33:16.85 |
-27:45:22.7 |
HIP 101250 |
24.83 |
| 2026-08-09 12:00 |
20:33:13.56 |
-27:45:31.0 |
HIP 101250 |
24.10 |
| 2026-08-10 00:00 |
20:33:10.28 |
-27:45:39.1 |
HIP 101250 |
23.38 |
| 2026-08-10 12:00 |
20:33:07.00 |
-27:45:47.2 |
HIP 101250 |
22.66 |
| 2026-08-11 00:00 |
20:33:03.73 |
-27:45:55.2 |
HIP 101250 |
21.94 |
| 2026-08-11 12:00 |
20:33:00.47 |
-27:46:03.2 |
HIP 101250 |
21.23 |
| 2026-08-12 00:00 |
20:32:57.22 |
-27:46:11.0 |
HIP 101250 |
20.52 |
| 2026-08-12 12:00 |
20:32:53.97 |
-27:46:18.7 |
HIP 101250 |
19.81 |
| 2026-08-13 00:00 |
20:32:50.73 |
-27:46:26.4 |
HIP 101250 |
19.10 |
| 2026-08-13 12:00 |
20:32:47.49 |
-27:46:33.9 |
HIP 101250 |
18.40 |
| 2026-08-14 00:00 |
20:32:44.27 |
-27:46:41.4 |
HIP 101250 |
17.70 |
| 2026-08-14 12:00 |
20:32:41.05 |
-27:46:48.7 |
HIP 101250 |
17.01 |
| 2026-08-15 00:00 |
20:32:37.85 |
-27:46:56.0 |
HIP 101250 |
16.32 |
| 2026-08-15 12:00 |
20:32:34.65 |
-27:47:03.2 |
HIP 101250 |
15.63 |
| 2026-08-16 00:00 |
20:32:31.46 |
-27:47:10.3 |
HIP 101250 |
14.95 |
| 2026-08-16 12:00 |
20:32:28.28 |
-27:47:17.3 |
HIP 101250 |
14.28 |
| 2026-08-17 00:00 |
20:32:25.11 |
-27:47:24.1 |
HIP 101250 |
13.60 |
| 2026-08-17 12:00 |
20:32:21.95 |
-27:47:30.9 |
HIP 101250 |
12.94 |
| 2026-08-18 00:00 |
20:32:18.80 |
-27:47:37.6 |
HIP 101250 |
12.28 |
| 2026-08-18 12:00 |
20:32:15.66 |
-27:47:44.2 |
HIP 101250 |
11.63 |
| 2026-08-19 00:00 |
20:32:12.53 |
-27:47:50.7 |
HIP 101250 |
10.99 |