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) |
| 2026-05-12 00:00 |
22:38:38.38 |
-69:10:34.2 |
HIP 111725 |
7.56 |
| 2026-05-12 12:00 |
22:38:41.18 |
-69:11:13.0 |
HIP 111725 |
7.17 |
| 2026-05-13 00:00 |
22:38:43.90 |
-69:11:52.0 |
HIP 111725 |
6.81 |
| 2026-05-13 12:00 |
22:38:46.54 |
-69:12:31.2 |
HIP 111725 |
6.50 |
| 2026-05-14 00:00 |
22:38:49.12 |
-69:13:10.6 |
HIP 111725 |
6.25 |
| 2026-05-14 12:00 |
22:38:51.62 |
-69:13:50.1 |
HIP 111725 |
6.06 |
| 2026-05-15 00:00 |
22:38:54.04 |
-69:14:29.9 |
HIP 111725 |
5.94 |
| 2026-05-15 12:00 |
22:38:56.39 |
-69:15:09.9 |
HIP 111725 |
5.89 |
| 2026-05-16 00:00 |
22:38:58.66 |
-69:15:50.1 |
HIP 111725 |
5.91 |
| 2026-05-16 12:00 |
22:39:00.86 |
-69:16:30.4 |
HIP 111725 |
6.01 |
| 2026-05-17 00:00 |
22:39:02.98 |
-69:17:10.9 |
HIP 111725 |
6.18 |
| 2026-05-17 12:00 |
22:39:05.02 |
-69:17:51.6 |
HIP 111725 |
6.42 |
| 2026-05-18 00:00 |
22:39:06.99 |
-69:18:32.4 |
HIP 111725 |
6.72 |
| 2026-05-18 12:00 |
22:39:08.88 |
-69:19:13.5 |
HIP 111725 |
7.07 |
| 2026-05-19 00:00 |
22:39:10.69 |
-69:19:54.7 |
HIP 111725 |
7.46 |
| 2026-05-19 12:00 |
22:39:12.43 |
-69:20:36.0 |
HIP 111725 |
7.89 |
| 2026-05-20 00:00 |
22:39:14.09 |
-69:21:17.5 |
HIP 111725 |
8.35 |
| 2026-05-20 12:00 |
22:39:15.67 |
-69:21:59.2 |
HIP 111725 |
8.85 |
| 2026-05-21 00:00 |
22:39:17.17 |
-69:22:41.0 |
HIP 111725 |
9.36 |
| 2026-05-21 12:00 |
22:39:18.60 |
-69:23:23.0 |
HIP 111725 |
9.90 |
| 2026-05-22 00:00 |
22:39:19.94 |
-69:24:05.1 |
HIP 111725 |
10.45 |
| 2026-05-22 12:00 |
22:39:21.21 |
-69:24:47.3 |
HIP 111725 |
11.02 |
| 2026-05-23 00:00 |
22:39:22.40 |
-69:25:29.7 |
HIP 111725 |
11.60 |
| 2026-05-23 12:00 |
22:39:23.51 |
-69:26:12.2 |
HIP 111725 |
12.19 |
| 2026-05-24 00:00 |
22:39:24.54 |
-69:26:54.9 |
HIP 111725 |
12.80 |
| 2026-05-24 12:00 |
22:39:25.49 |
-69:27:37.7 |
HIP 111725 |
13.41 |
| 2026-05-25 00:00 |
22:39:26.37 |
-69:28:20.6 |
HIP 111725 |
14.02 |
| 2026-05-25 12:00 |
22:39:27.16 |
-69:29:03.6 |
HIP 111725 |
14.65 |
| 2026-05-26 00:00 |
22:39:27.88 |
-69:29:46.7 |
HIP 111725 |
15.28 |
| 2026-05-26 12:00 |
22:39:28.51 |
-69:30:30.0 |
HIP 111725 |
15.92 |
| 2026-05-27 00:00 |
22:39:29.06 |
-69:31:13.3 |
HIP 111725 |
16.56 |
| 2026-05-27 12:00 |
22:39:29.54 |
-69:31:56.8 |
HIP 111725 |
17.21 |
| 2026-05-28 00:00 |
22:39:29.93 |
-69:32:40.4 |
HIP 111725 |
17.86 |
| 2026-05-28 12:00 |
22:39:30.25 |
-69:33:24.1 |
HIP 111725 |
18.51 |
| 2026-05-29 00:00 |
22:39:30.48 |
-69:34:07.8 |
HIP 111725 |
19.17 |
| 2026-05-29 12:00 |
22:39:30.63 |
-69:34:51.7 |
HIP 111725 |
19.83 |
| 2026-05-30 00:00 |
22:39:30.71 |
-69:35:35.7 |
HIP 111725 |
20.50 |
| 2026-05-30 12:00 |
22:39:30.70 |
-69:36:19.7 |
HIP 111725 |
21.17 |
| 2026-05-31 00:00 |
22:39:30.61 |
-69:37:03.8 |
HIP 111725 |
21.84 |
| 2026-05-31 12:00 |
22:39:30.44 |
-69:37:48.1 |
HIP 111725 |
22.51 |
| 2026-06-01 00:00 |
22:39:30.19 |
-69:38:32.4 |
HIP 111725 |
23.18 |
| 2026-06-01 12:00 |
22:39:29.85 |
-69:39:16.7 |
HIP 111725 |
23.86 |
| 2026-06-02 00:00 |
22:39:29.44 |
-69:40:01.2 |
HIP 111725 |
24.54 |