メタデータ
| 項目 |
値 |
| Designation |
C/2004 X3 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2005-06-17T04:32:11.241600Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:45Z |
| Obs used |
241 |
| NEO |
- |
| M1 |
6.800 |
| K1 |
13.250 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2005-02-19.0000000 |
| e |
1.00642712 |
| q (au) |
4.402298 |
| a (au) |
-684.956072 |
| i (deg) |
81.076589 |
| Ω (om, deg) |
343.047740 |
| ω (w, deg) |
202.126117 |
| M (ma, deg) |
-0.006498 |
等級
散乱 + 全体線形
$$
M_a = (12.298 + 3.877\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
12.298 |
| n |
3.877 |
| gf |
0.991 |
| gb |
-0.765 |
| k |
0.800 |
| δ90 |
8.584 |
| 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 |
23:19:10.94 |
-23:28:50.7 |
HIP 115173 |
16.85 |
| 2026-07-29 12:00 |
23:19:08.62 |
-23:29:09.8 |
HIP 115173 |
17.37 |
| 2026-07-30 00:00 |
23:19:06.29 |
-23:29:28.9 |
HIP 115173 |
17.89 |
| 2026-07-30 12:00 |
23:19:03.94 |
-23:29:48.0 |
HIP 115173 |
18.42 |
| 2026-07-31 00:00 |
23:19:01.57 |
-23:30:07.1 |
HIP 115173 |
18.96 |
| 2026-07-31 12:00 |
23:18:59.18 |
-23:30:26.2 |
HIP 115173 |
19.50 |
| 2026-08-01 00:00 |
23:18:56.78 |
-23:30:45.3 |
HIP 115173 |
20.06 |
| 2026-08-01 12:00 |
23:18:54.36 |
-23:31:04.4 |
HIP 115173 |
20.62 |
| 2026-08-02 00:00 |
23:18:51.92 |
-23:31:23.5 |
HIP 115173 |
21.19 |
| 2026-08-02 12:00 |
23:18:49.46 |
-23:31:42.6 |
HIP 115173 |
21.76 |
| 2026-08-03 00:00 |
23:18:46.99 |
-23:32:01.7 |
HIP 115173 |
22.34 |
| 2026-08-03 12:00 |
23:18:44.50 |
-23:32:20.7 |
HIP 115173 |
22.92 |
| 2026-08-04 00:00 |
23:18:42.00 |
-23:32:39.8 |
HIP 115173 |
23.51 |
| 2026-08-04 12:00 |
23:18:39.48 |
-23:32:58.8 |
HIP 115173 |
24.11 |
| 2026-08-05 00:00 |
23:18:36.94 |
-23:33:17.9 |
HIP 114954 |
24.19 |
| 2026-08-05 12:00 |
23:18:34.39 |
-23:33:36.9 |
HIP 114954 |
23.78 |
| 2026-08-06 00:00 |
23:18:31.82 |
-23:33:55.9 |
HIP 114954 |
23.38 |
| 2026-08-06 12:00 |
23:18:29.23 |
-23:34:14.9 |
HIP 114954 |
22.99 |
| 2026-08-07 00:00 |
23:18:26.63 |
-23:34:33.8 |
HIP 114954 |
22.62 |
| 2026-08-07 12:00 |
23:18:24.02 |
-23:34:52.8 |
HIP 114954 |
22.25 |
| 2026-08-08 00:00 |
23:18:21.39 |
-23:35:11.7 |
HIP 114954 |
21.89 |
| 2026-08-08 12:00 |
23:18:18.74 |
-23:35:30.6 |
HIP 114954 |
21.55 |
| 2026-08-09 00:00 |
23:18:16.08 |
-23:35:49.4 |
HIP 114954 |
21.21 |
| 2026-08-09 12:00 |
23:18:13.41 |
-23:36:08.3 |
HIP 114954 |
20.90 |
| 2026-08-10 00:00 |
23:18:10.72 |
-23:36:27.0 |
HIP 114954 |
20.60 |
| 2026-08-10 12:00 |
23:18:08.02 |
-23:36:45.8 |
HIP 114954 |
20.31 |
| 2026-08-11 00:00 |
23:18:05.30 |
-23:37:04.5 |
HIP 114954 |
20.04 |
| 2026-08-11 12:00 |
23:18:02.57 |
-23:37:23.2 |
HIP 114954 |
19.79 |
| 2026-08-12 00:00 |
23:17:59.82 |
-23:37:41.9 |
HIP 114954 |
19.56 |
| 2026-08-12 12:00 |
23:17:57.07 |
-23:38:00.5 |
HIP 114954 |
19.35 |
| 2026-08-13 00:00 |
23:17:54.30 |
-23:38:19.0 |
HIP 114954 |
19.16 |
| 2026-08-13 12:00 |
23:17:51.51 |
-23:38:37.6 |
HIP 114954 |
18.99 |
| 2026-08-14 00:00 |
23:17:48.72 |
-23:38:56.0 |
HIP 114954 |
18.85 |
| 2026-08-14 12:00 |
23:17:45.91 |
-23:39:14.4 |
HIP 114954 |
18.73 |
| 2026-08-15 00:00 |
23:17:43.09 |
-23:39:32.8 |
HIP 114954 |
18.63 |
| 2026-08-15 12:00 |
23:17:40.25 |
-23:39:51.1 |
HIP 114954 |
18.56 |
| 2026-08-16 00:00 |
23:17:37.41 |
-23:40:09.4 |
HIP 114954 |
18.52 |
| 2026-08-16 12:00 |
23:17:34.55 |
-23:40:27.6 |
HIP 114954 |
18.50 |
| 2026-08-17 00:00 |
23:17:31.69 |
-23:40:45.8 |
HIP 114954 |
18.50 |
| 2026-08-17 12:00 |
23:17:28.81 |
-23:41:03.8 |
HIP 114964 |
18.32 |
| 2026-08-18 00:00 |
23:17:25.92 |
-23:41:21.9 |
HIP 114964 |
17.85 |
| 2026-08-18 12:00 |
23:17:23.02 |
-23:41:39.8 |
HIP 114964 |
17.40 |
| 2026-08-19 00:00 |
23:17:20.11 |
-23:41:57.7 |
HIP 114964 |
16.97 |