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) |
| 2026-06-01 00:00 |
20:39:52.85 |
-27:19:25.0 |
HIP 102030 |
18.38 |
| 2026-06-01 12:00 |
20:39:51.12 |
-27:19:36.0 |
HIP 102030 |
18.43 |
| 2026-06-02 00:00 |
20:39:49.37 |
-27:19:47.1 |
HIP 102030 |
18.48 |
| 2026-06-02 12:00 |
20:39:47.58 |
-27:19:58.1 |
HIP 102030 |
18.55 |
| 2026-06-03 00:00 |
20:39:45.78 |
-27:20:09.3 |
HIP 102030 |
18.63 |
| 2026-06-03 12:00 |
20:39:43.95 |
-27:20:20.4 |
HIP 102030 |
18.73 |
| 2026-06-04 00:00 |
20:39:42.09 |
-27:20:31.7 |
HIP 102030 |
18.84 |
| 2026-06-04 12:00 |
20:39:40.21 |
-27:20:43.0 |
HIP 102030 |
18.96 |
| 2026-06-05 00:00 |
20:39:38.31 |
-27:20:54.3 |
HIP 102030 |
19.09 |
| 2026-06-05 12:00 |
20:39:36.38 |
-27:21:05.7 |
HIP 102030 |
19.24 |
| 2026-06-06 00:00 |
20:39:34.43 |
-27:21:17.1 |
HIP 102030 |
19.40 |
| 2026-06-06 12:00 |
20:39:32.45 |
-27:21:28.5 |
HIP 102030 |
19.57 |
| 2026-06-07 00:00 |
20:39:30.45 |
-27:21:40.0 |
HIP 102030 |
19.76 |
| 2026-06-07 12:00 |
20:39:28.43 |
-27:21:51.6 |
HIP 102030 |
19.96 |
| 2026-06-08 00:00 |
20:39:26.38 |
-27:22:03.2 |
HIP 102030 |
20.17 |
| 2026-06-08 12:00 |
20:39:24.31 |
-27:22:14.8 |
HIP 102030 |
20.40 |
| 2026-06-09 00:00 |
20:39:22.22 |
-27:22:26.4 |
HIP 102030 |
20.64 |
| 2026-06-09 12:00 |
20:39:20.10 |
-27:22:38.1 |
HIP 102030 |
20.89 |
| 2026-06-10 00:00 |
20:39:17.96 |
-27:22:49.9 |
HIP 102030 |
21.16 |
| 2026-06-10 12:00 |
20:39:15.80 |
-27:23:01.7 |
HIP 102030 |
21.43 |
| 2026-06-11 00:00 |
20:39:13.61 |
-27:23:13.5 |
HIP 102030 |
21.73 |
| 2026-06-11 12:00 |
20:39:11.41 |
-27:23:25.3 |
HIP 101976 |
21.95 |
| 2026-06-12 00:00 |
20:39:09.18 |
-27:23:37.2 |
HIP 101976 |
22.00 |
| 2026-06-12 12:00 |
20:39:06.92 |
-27:23:49.1 |
HIP 101976 |
22.07 |
| 2026-06-13 00:00 |
20:39:04.65 |
-27:24:01.0 |
HIP 101976 |
22.15 |
| 2026-06-13 12:00 |
20:39:02.36 |
-27:24:13.0 |
HIP 101976 |
22.25 |
| 2026-06-14 00:00 |
20:39:00.04 |
-27:24:25.0 |
HIP 101976 |
22.36 |
| 2026-06-14 12:00 |
20:38:57.70 |
-27:24:37.0 |
HIP 101976 |
22.49 |
| 2026-06-15 00:00 |
20:38:55.34 |
-27:24:49.1 |
HIP 101976 |
22.63 |
| 2026-06-15 12:00 |
20:38:52.96 |
-27:25:01.2 |
HIP 101976 |
22.78 |
| 2026-06-16 00:00 |
20:38:50.56 |
-27:25:13.3 |
HIP 101976 |
22.96 |
| 2026-06-16 12:00 |
20:38:48.14 |
-27:25:25.4 |
HIP 101976 |
23.15 |
| 2026-06-17 00:00 |
20:38:45.70 |
-27:25:37.5 |
HIP 101976 |
23.35 |
| 2026-06-17 12:00 |
20:38:43.23 |
-27:25:49.7 |
HIP 101976 |
23.57 |
| 2026-06-18 00:00 |
20:38:40.75 |
-27:26:01.9 |
HIP 101976 |
23.80 |
| 2026-06-18 12:00 |
20:38:38.25 |
-27:26:14.1 |
HIP 101976 |
24.05 |
| 2026-06-19 00:00 |
20:38:35.73 |
-27:26:26.3 |
HIP 101976 |
24.31 |
| 2026-06-19 12:00 |
20:38:33.19 |
-27:26:38.5 |
HIP 101976 |
24.59 |
| 2026-06-20 00:00 |
20:38:30.62 |
-27:26:50.8 |
HIP 101976 |
24.88 |
| 2026-06-20 12:00 |
20:38:28.05 |
-27:27:03.0 |
HIP 101976 |
25.19 |
| 2026-06-21 00:00 |
20:38:25.45 |
-27:27:15.3 |
HIP 101976 |
25.51 |
| 2026-06-21 12:00 |
20:38:22.83 |
-27:27:27.6 |
HIP 101976 |
25.84 |
| 2026-06-22 00:00 |
20:38:20.20 |
-27:27:39.9 |
HIP 101976 |
26.19 |