メタデータ
| 項目 |
値 |
| Designation |
C/2003 T4 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2005-04-03T15:45:28.166400Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:34Z |
| Obs used |
955 |
| NEO |
- |
| M1 |
9.200 |
| K1 |
6.750 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2004-10-20.0000000 |
| e |
1.00047448 |
| q (au) |
0.849741 |
| a (au) |
-1790.885861 |
| i (deg) |
86.761193 |
| Ω (om, deg) |
93.902875 |
| ω (w, deg) |
181.679273 |
| M (ma, deg) |
-0.002154 |
等級
散乱 + 全体線形
$$
M_a = (7.953 + 4.136\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
7.953 |
| n |
4.136 |
| gf |
0.800 |
| gb |
-1.000 |
| k |
0.988 |
| δ90 |
1.000 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 2003-10-13 |
2004-05-22 |
+1.4145 |
-1.791 |
| 2004-05-22 |
2004-09-06 |
+1.1723 |
-1.351 |
| 2004-09-06 |
2005-04-02 |
-1.5294 |
-0.289 |
| 2005-04-03 |
2005-05-04 |
+13.8649 |
+1.663 |
| 2005-05-04 |
2006-03-25 |
+0.8135 |
+1.141 |
log10 r = log10(太陽距離/AU)、Δ = 地球距離(AU)
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
06:08:23.97 |
+08:57:23.5 |
HIP 29138 |
18.14 |
| 2026-05-12 12:00 |
06:08:26.05 |
+08:57:31.0 |
HIP 29138 |
18.11 |
| 2026-05-13 00:00 |
06:08:28.15 |
+08:57:38.5 |
HIP 29138 |
18.09 |
| 2026-05-13 12:00 |
06:08:30.26 |
+08:57:45.9 |
HIP 29138 |
18.08 |
| 2026-05-14 00:00 |
06:08:32.39 |
+08:57:53.3 |
HIP 29138 |
18.09 |
| 2026-05-14 12:00 |
06:08:34.53 |
+08:58:00.6 |
HIP 29138 |
18.11 |
| 2026-05-15 00:00 |
06:08:36.68 |
+08:58:07.8 |
HIP 29138 |
18.14 |
| 2026-05-15 12:00 |
06:08:38.85 |
+08:58:14.9 |
HIP 29138 |
18.19 |
| 2026-05-16 00:00 |
06:08:41.03 |
+08:58:22.0 |
HIP 29138 |
18.26 |
| 2026-05-16 12:00 |
06:08:43.23 |
+08:58:28.9 |
HIP 29138 |
18.34 |
| 2026-05-17 00:00 |
06:08:45.44 |
+08:58:35.8 |
HIP 29138 |
18.43 |
| 2026-05-17 12:00 |
06:08:47.66 |
+08:58:42.6 |
HIP 29138 |
18.54 |
| 2026-05-18 00:00 |
06:08:49.90 |
+08:58:49.4 |
HIP 29138 |
18.67 |
| 2026-05-18 12:00 |
06:08:52.15 |
+08:58:56.1 |
HIP 29138 |
18.81 |
| 2026-05-19 00:00 |
06:08:54.41 |
+08:59:02.7 |
HIP 29138 |
18.96 |
| 2026-05-19 12:00 |
06:08:56.68 |
+08:59:09.2 |
HIP 29138 |
19.13 |
| 2026-05-20 00:00 |
06:08:58.97 |
+08:59:15.6 |
HIP 29235 |
19.09 |
| 2026-05-20 12:00 |
06:09:01.27 |
+08:59:22.0 |
HIP 29235 |
18.81 |
| 2026-05-21 00:00 |
06:09:03.58 |
+08:59:28.2 |
HIP 29235 |
18.54 |
| 2026-05-21 12:00 |
06:09:05.90 |
+08:59:34.4 |
HIP 29235 |
18.29 |
| 2026-05-22 00:00 |
06:09:08.23 |
+08:59:40.6 |
HIP 29235 |
18.04 |
| 2026-05-22 12:00 |
06:09:10.58 |
+08:59:46.6 |
HIP 29235 |
17.81 |
| 2026-05-23 00:00 |
06:09:12.93 |
+08:59:52.6 |
HIP 29235 |
17.60 |
| 2026-05-23 12:00 |
06:09:15.30 |
+08:59:58.4 |
HIP 29235 |
17.40 |
| 2026-05-24 00:00 |
06:09:17.68 |
+09:00:04.3 |
HIP 29235 |
17.21 |
| 2026-05-24 12:00 |
06:09:20.07 |
+09:00:10.0 |
HIP 29235 |
17.04 |
| 2026-05-25 00:00 |
06:09:22.47 |
+09:00:15.6 |
HIP 29235 |
16.89 |
| 2026-05-25 12:00 |
06:09:24.88 |
+09:00:21.2 |
HIP 29235 |
16.76 |
| 2026-05-26 00:00 |
06:09:27.30 |
+09:00:26.7 |
HIP 29235 |
16.64 |
| 2026-05-26 12:00 |
06:09:29.73 |
+09:00:32.1 |
HIP 29235 |
16.55 |
| 2026-05-27 00:00 |
06:09:32.17 |
+09:00:37.4 |
HIP 29235 |
16.47 |
| 2026-05-27 12:00 |
06:09:34.62 |
+09:00:42.6 |
HIP 29235 |
16.42 |
| 2026-05-28 00:00 |
06:09:37.08 |
+09:00:47.8 |
HIP 29235 |
16.38 |
| 2026-05-28 12:00 |
06:09:39.55 |
+09:00:52.8 |
HIP 29235 |
16.37 |
| 2026-05-29 00:00 |
06:09:42.03 |
+09:00:57.8 |
HIP 29235 |
16.38 |
| 2026-05-29 12:00 |
06:09:44.51 |
+09:01:02.8 |
HIP 29235 |
16.41 |
| 2026-05-30 00:00 |
06:09:47.01 |
+09:01:07.6 |
HIP 29235 |
16.46 |
| 2026-05-30 12:00 |
06:09:49.52 |
+09:01:12.3 |
HIP 29235 |
16.54 |
| 2026-05-31 00:00 |
06:09:52.03 |
+09:01:17.0 |
HIP 29235 |
16.63 |
| 2026-05-31 12:00 |
06:09:54.55 |
+09:01:21.6 |
HIP 29235 |
16.75 |
| 2026-06-01 00:00 |
06:09:57.08 |
+09:01:26.1 |
HIP 29235 |
16.89 |
| 2026-06-01 12:00 |
06:09:59.62 |
+09:01:30.5 |
HIP 29235 |
17.05 |
| 2026-06-02 00:00 |
06:10:02.17 |
+09:01:34.8 |
HIP 29235 |
17.23 |