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) |
| 2026-07-29 00:00 |
22:30:01.64 |
-70:56:44.9 |
HIP 111151 |
18.39 |
| 2026-07-29 12:00 |
22:29:52.72 |
-70:57:13.1 |
HIP 111151 |
18.17 |
| 2026-07-30 00:00 |
22:29:43.74 |
-70:57:41.0 |
HIP 111151 |
17.99 |
| 2026-07-30 12:00 |
22:29:34.73 |
-70:58:08.5 |
HIP 111151 |
17.86 |
| 2026-07-31 00:00 |
22:29:25.66 |
-70:58:35.7 |
HIP 111151 |
17.78 |
| 2026-07-31 12:00 |
22:29:16.54 |
-70:59:02.5 |
HIP 111151 |
17.75 |
| 2026-08-01 00:00 |
22:29:07.38 |
-70:59:29.0 |
HIP 111151 |
17.77 |
| 2026-08-01 12:00 |
22:28:58.18 |
-70:59:55.1 |
HIP 111151 |
17.83 |
| 2026-08-02 00:00 |
22:28:48.93 |
-71:00:20.9 |
HIP 111151 |
17.94 |
| 2026-08-02 12:00 |
22:28:39.64 |
-71:00:46.3 |
HIP 111151 |
18.10 |
| 2026-08-03 00:00 |
22:28:30.30 |
-71:01:11.3 |
HIP 111151 |
18.31 |
| 2026-08-03 12:00 |
22:28:20.92 |
-71:01:36.0 |
HIP 111151 |
18.56 |
| 2026-08-04 00:00 |
22:28:11.50 |
-71:02:00.4 |
HIP 111151 |
18.85 |
| 2026-08-04 12:00 |
22:28:02.04 |
-71:02:24.3 |
HIP 111151 |
19.18 |
| 2026-08-05 00:00 |
22:27:52.54 |
-71:02:47.9 |
HIP 111151 |
19.55 |
| 2026-08-05 12:00 |
22:27:43.00 |
-71:03:11.2 |
HIP 111151 |
19.96 |
| 2026-08-06 00:00 |
22:27:33.43 |
-71:03:34.0 |
HIP 111151 |
20.40 |
| 2026-08-06 12:00 |
22:27:23.81 |
-71:03:56.5 |
HIP 111151 |
20.87 |
| 2026-08-07 00:00 |
22:27:14.16 |
-71:04:18.6 |
HIP 111151 |
21.37 |
| 2026-08-07 12:00 |
22:27:04.47 |
-71:04:40.3 |
HIP 111151 |
21.90 |
| 2026-08-08 00:00 |
22:26:54.75 |
-71:05:01.6 |
HIP 111151 |
22.46 |
| 2026-08-08 12:00 |
22:26:44.99 |
-71:05:22.6 |
HIP 111151 |
23.03 |
| 2026-08-09 00:00 |
22:26:35.20 |
-71:05:43.1 |
HIP 111151 |
23.63 |
| 2026-08-09 12:00 |
22:26:25.37 |
-71:06:03.3 |
HIP 111151 |
24.25 |
| 2026-08-10 00:00 |
22:26:15.52 |
-71:06:23.1 |
HIP 111151 |
24.89 |
| 2026-08-10 12:00 |
22:26:05.63 |
-71:06:42.5 |
HIP 111151 |
25.55 |
| 2026-08-11 00:00 |
22:25:55.72 |
-71:07:01.4 |
HIP 110490 |
26.02 |
| 2026-08-11 12:00 |
22:25:45.77 |
-71:07:20.0 |
HIP 110490 |
25.31 |
| 2026-08-12 00:00 |
22:25:35.80 |
-71:07:38.2 |
HIP 110490 |
24.62 |
| 2026-08-12 12:00 |
22:25:25.80 |
-71:07:56.0 |
HIP 110490 |
23.95 |
| 2026-08-13 00:00 |
22:25:15.77 |
-71:08:13.3 |
HIP 110490 |
23.29 |
| 2026-08-13 12:00 |
22:25:05.72 |
-71:08:30.3 |
HIP 110490 |
22.66 |
| 2026-08-14 00:00 |
22:24:55.65 |
-71:08:46.9 |
HIP 110490 |
22.04 |
| 2026-08-14 12:00 |
22:24:45.55 |
-71:09:03.0 |
HIP 110490 |
21.44 |
| 2026-08-15 00:00 |
22:24:35.43 |
-71:09:18.7 |
HIP 110490 |
20.87 |
| 2026-08-15 12:00 |
22:24:25.29 |
-71:09:34.0 |
HIP 110490 |
20.32 |
| 2026-08-16 00:00 |
22:24:15.12 |
-71:09:48.9 |
HIP 110490 |
19.80 |
| 2026-08-16 12:00 |
22:24:04.94 |
-71:10:03.4 |
HIP 110490 |
19.31 |
| 2026-08-17 00:00 |
22:23:54.74 |
-71:10:17.5 |
HIP 110490 |
18.86 |
| 2026-08-17 12:00 |
22:23:44.53 |
-71:10:31.1 |
HIP 110490 |
18.43 |
| 2026-08-18 00:00 |
22:23:34.29 |
-71:10:44.3 |
HIP 110490 |
18.05 |
| 2026-08-18 12:00 |
22:23:24.05 |
-71:10:57.1 |
HIP 110490 |
17.70 |
| 2026-08-19 00:00 |
22:23:13.78 |
-71:11:09.5 |
HIP 110490 |
17.39 |