C/2004 T3 (Siding Spring)
メタデータ
| 項目 |
値 |
| Designation |
C/2004 T3 (Siding Spring) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2003-04-15T07:34:17.973120Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:43Z |
| Obs used |
106 |
| NEO |
- |
| M1 |
6.300 |
| K1 |
7.250 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2005-02-13.0000000 |
| e |
0.99848905 |
| q (au) |
8.864365 |
| a (au) |
5866.764568 |
| i (deg) |
71.964320 |
| Ω (om, deg) |
50.354596 |
| ω (w, deg) |
259.686905 |
| M (ma, deg) |
0.001469 |
等級
散乱 + 全体線形
$$
M_a = (-1.455 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
-1.455 |
| 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) |
| 2026-02-03 00:00 |
03:09:34.01 |
+39:43:11.3 |
HIP 14817 |
20.93 |
| 2026-02-03 12:00 |
03:09:33.62 |
+39:42:57.6 |
HIP 14817 |
20.93 |
| 2026-02-04 00:00 |
03:09:33.26 |
+39:42:43.9 |
HIP 14817 |
20.93 |
| 2026-02-04 12:00 |
03:09:32.93 |
+39:42:30.4 |
HIP 14817 |
20.93 |
| 2026-02-05 00:00 |
03:09:32.64 |
+39:42:17.0 |
HIP 14817 |
20.92 |
| 2026-02-05 12:00 |
03:09:32.38 |
+39:42:03.7 |
HIP 14817 |
20.91 |
| 2026-02-06 00:00 |
03:09:32.16 |
+39:41:50.4 |
HIP 14817 |
20.90 |
| 2026-02-06 12:00 |
03:09:31.97 |
+39:41:37.3 |
HIP 14817 |
20.88 |
| 2026-02-07 00:00 |
03:09:31.82 |
+39:41:24.3 |
HIP 14817 |
20.86 |
| 2026-02-07 12:00 |
03:09:31.70 |
+39:41:11.3 |
HIP 14817 |
20.84 |
| 2026-02-08 00:00 |
03:09:31.61 |
+39:40:58.5 |
HIP 14817 |
20.81 |
| 2026-02-08 12:00 |
03:09:31.56 |
+39:40:45.8 |
HIP 14817 |
20.78 |
| 2026-02-09 00:00 |
03:09:31.54 |
+39:40:33.2 |
HIP 14817 |
20.74 |
| 2026-02-09 12:00 |
03:09:31.56 |
+39:40:20.7 |
HIP 14817 |
20.70 |
| 2026-02-10 00:00 |
03:09:31.61 |
+39:40:08.3 |
HIP 14817 |
20.66 |
| 2026-02-10 12:00 |
03:09:31.70 |
+39:39:56.0 |
HIP 14817 |
20.61 |
| 2026-02-11 00:00 |
03:09:31.82 |
+39:39:43.9 |
HIP 14817 |
20.55 |
| 2026-02-11 12:00 |
03:09:31.97 |
+39:39:31.8 |
HIP 14817 |
20.50 |
| 2026-02-12 00:00 |
03:09:32.16 |
+39:39:19.9 |
HIP 14817 |
20.43 |
| 2026-02-12 12:00 |
03:09:32.38 |
+39:39:08.0 |
HIP 14817 |
20.37 |
| 2026-02-13 00:00 |
03:09:32.63 |
+39:38:56.3 |
HIP 14817 |
20.30 |
| 2026-02-13 12:00 |
03:09:32.92 |
+39:38:44.8 |
HIP 14817 |
20.22 |
| 2026-02-14 00:00 |
03:09:33.25 |
+39:38:33.3 |
HIP 14817 |
20.14 |
| 2026-02-14 12:00 |
03:09:33.60 |
+39:38:21.9 |
HIP 14817 |
20.06 |
| 2026-02-15 00:00 |
03:09:34.00 |
+39:38:10.7 |
HIP 14817 |
19.97 |
| 2026-02-15 12:00 |
03:09:34.42 |
+39:37:59.6 |
HIP 14817 |
19.87 |
| 2026-02-16 00:00 |
03:09:34.88 |
+39:37:48.6 |
HIP 14817 |
19.77 |
| 2026-02-16 12:00 |
03:09:35.37 |
+39:37:37.8 |
HIP 14817 |
19.67 |
| 2026-02-17 00:00 |
03:09:35.90 |
+39:37:27.1 |
HIP 14817 |
19.56 |
| 2026-02-17 12:00 |
03:09:36.46 |
+39:37:16.5 |
HIP 14817 |
19.45 |
| 2026-02-18 00:00 |
03:09:37.05 |
+39:37:06.0 |
HIP 14817 |
19.33 |
| 2026-02-18 12:00 |
03:09:37.67 |
+39:36:55.7 |
HIP 14817 |
19.21 |
| 2026-02-19 00:00 |
03:09:38.33 |
+39:36:45.5 |
HIP 14817 |
19.08 |
| 2026-02-19 12:00 |
03:09:39.02 |
+39:36:35.4 |
HIP 14817 |
18.95 |
| 2026-02-20 00:00 |
03:09:39.75 |
+39:36:25.5 |
HIP 14743 |
18.78 |
| 2026-02-20 12:00 |
03:09:40.51 |
+39:36:15.7 |
HIP 14743 |
18.57 |
| 2026-02-21 00:00 |
03:09:41.30 |
+39:36:06.0 |
HIP 14743 |
18.36 |
| 2026-02-21 12:00 |
03:09:42.12 |
+39:35:56.5 |
HIP 14743 |
18.15 |
| 2026-02-22 00:00 |
03:09:42.98 |
+39:35:47.1 |
HIP 14743 |
17.94 |
| 2026-02-22 12:00 |
03:09:43.87 |
+39:35:37.8 |
HIP 14743 |
17.73 |
| 2026-02-23 00:00 |
03:09:44.79 |
+39:35:28.7 |
HIP 14743 |
17.52 |
| 2026-02-23 12:00 |
03:09:45.74 |
+39:35:19.7 |
HIP 14743 |
17.31 |
| 2026-02-24 00:00 |
03:09:46.73 |
+39:35:10.9 |
HIP 14743 |
17.10 |