メタデータ
| 項目 |
値 |
| Designation |
C/2008 X3 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2008-10-10T14:06:11.905920Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:25Z |
| Obs used |
127 |
| NEO |
- |
| M1 |
11.700 |
| K1 |
16.250 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2009-01-07.0000000 |
| e |
0.95653616 |
| q (au) |
1.902117 |
| a (au) |
43.763220 |
| i (deg) |
66.474978 |
| Ω (om, deg) |
337.751045 |
| ω (w, deg) |
140.801601 |
| M (ma, deg) |
0.300991 |
等級
散乱 + 全体線形
$$
M_a = (11.351 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
11.351 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| 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) |
| 2026-09-20 00:00 |
22:12:30.18 |
-71:09:14.8 |
HIP 109680 |
2.87 |
| 2026-09-20 12:00 |
22:12:21.00 |
-71:08:58.9 |
HIP 109680 |
3.57 |
| 2026-09-21 00:00 |
22:12:11.88 |
-71:08:42.6 |
HIP 109680 |
4.30 |
| 2026-09-21 12:00 |
22:12:02.79 |
-71:08:25.8 |
HIP 109680 |
5.04 |
| 2026-09-22 00:00 |
22:11:53.76 |
-71:08:08.7 |
HIP 109680 |
5.79 |
| 2026-09-22 12:00 |
22:11:44.78 |
-71:07:51.1 |
HIP 109680 |
6.55 |
| 2026-09-23 00:00 |
22:11:35.84 |
-71:07:33.1 |
HIP 109680 |
7.31 |
| 2026-09-23 12:00 |
22:11:26.96 |
-71:07:14.7 |
HIP 109680 |
8.07 |
| 2026-09-24 00:00 |
22:11:18.13 |
-71:06:55.9 |
HIP 109680 |
8.83 |
| 2026-09-24 12:00 |
22:11:09.35 |
-71:06:36.8 |
HIP 109680 |
9.59 |
| 2026-09-25 00:00 |
22:11:00.63 |
-71:06:17.2 |
HIP 109680 |
10.35 |
| 2026-09-25 12:00 |
22:10:51.95 |
-71:05:57.2 |
HIP 109680 |
11.12 |
| 2026-09-26 00:00 |
22:10:43.34 |
-71:05:36.8 |
HIP 109680 |
11.88 |
| 2026-09-26 12:00 |
22:10:34.77 |
-71:05:16.0 |
HIP 109365 |
12.42 |
| 2026-09-27 00:00 |
22:10:26.27 |
-71:04:54.8 |
HIP 109365 |
11.79 |
| 2026-09-27 12:00 |
22:10:17.82 |
-71:04:33.2 |
HIP 109365 |
11.18 |
| 2026-09-28 00:00 |
22:10:09.42 |
-71:04:11.2 |
HIP 109365 |
10.59 |
| 2026-09-28 12:00 |
22:10:01.09 |
-71:03:48.9 |
HIP 109365 |
10.02 |
| 2026-09-29 00:00 |
22:09:52.81 |
-71:03:26.1 |
HIP 109365 |
9.47 |
| 2026-09-29 12:00 |
22:09:44.59 |
-71:03:03.0 |
HIP 109365 |
8.96 |
| 2026-09-30 00:00 |
22:09:36.43 |
-71:02:39.5 |
HIP 109365 |
8.47 |
| 2026-09-30 12:00 |
22:09:28.33 |
-71:02:15.6 |
HIP 109365 |
8.02 |
| 2026-10-01 00:00 |
22:09:20.30 |
-71:01:51.3 |
HIP 109365 |
7.62 |
| 2026-10-01 12:00 |
22:09:12.32 |
-71:01:26.6 |
HIP 109365 |
7.27 |
| 2026-10-02 00:00 |
22:09:04.41 |
-71:01:01.6 |
HIP 109365 |
6.98 |
| 2026-10-02 12:00 |
22:08:56.56 |
-71:00:36.1 |
HIP 109365 |
6.76 |
| 2026-10-03 00:00 |
22:08:48.77 |
-71:00:10.4 |
HIP 109365 |
6.61 |
| 2026-10-03 12:00 |
22:08:41.05 |
-70:59:44.2 |
HIP 109365 |
6.54 |
| 2026-10-04 00:00 |
22:08:33.39 |
-70:59:17.7 |
HIP 109365 |
6.55 |
| 2026-10-04 12:00 |
22:08:25.80 |
-70:58:50.8 |
HIP 109365 |
6.65 |
| 2026-10-05 00:00 |
22:08:18.27 |
-70:58:23.5 |
HIP 109365 |
6.82 |
| 2026-10-05 12:00 |
22:08:10.82 |
-70:57:55.9 |
HIP 109365 |
7.06 |
| 2026-10-06 00:00 |
22:08:03.43 |
-70:57:27.9 |
HIP 109365 |
7.37 |
| 2026-10-06 12:00 |
22:07:56.10 |
-70:56:59.5 |
HIP 109365 |
7.73 |
| 2026-10-07 00:00 |
22:07:48.85 |
-70:56:30.8 |
HIP 109365 |
8.14 |
| 2026-10-07 12:00 |
22:07:41.67 |
-70:56:01.8 |
HIP 109365 |
8.60 |
| 2026-10-08 00:00 |
22:07:34.56 |
-70:55:32.4 |
HIP 109365 |
9.09 |
| 2026-10-08 12:00 |
22:07:27.51 |
-70:55:02.6 |
HIP 109365 |
9.60 |
| 2026-10-09 00:00 |
22:07:20.54 |
-70:54:32.5 |
HIP 109365 |
10.15 |
| 2026-10-09 12:00 |
22:07:13.64 |
-70:54:02.1 |
HIP 109365 |
10.71 |
| 2026-10-10 00:00 |
22:07:06.82 |
-70:53:31.3 |
HIP 109365 |
11.29 |
| 2026-10-10 12:00 |
22:07:00.06 |
-70:53:00.1 |
HIP 109365 |
11.89 |
| 2026-10-11 00:00 |
22:06:53.38 |
-70:52:28.7 |
HIP 109365 |
12.50 |