メタデータ
| 項目 |
値 |
| Designation |
C/2003 G2 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2003-04-29T22:13:50.937600Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:28Z |
| Obs used |
112 |
| NEO |
- |
| M1 |
16.700 |
| K1 |
10.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2003-04-15.0000000 |
| e |
0.99641357 |
| q (au) |
1.553361 |
| a (au) |
433.122485 |
| i (deg) |
96.166608 |
| Ω (om, deg) |
24.567711 |
| ω (w, deg) |
190.673723 |
| M (ma, deg) |
359.998368 |
等級
散乱 + 全体線形
$$
M_a = (16.220 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
16.220 |
| n |
6.000 |
| gf |
0.997 |
| gb |
-0.598 |
| k |
0.967 |
| δ90 |
8.043 |
| 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 |
01:55:31.32 |
+00:40:41.1 |
HIP 8952 |
5.27 |
| 2026-07-29 12:00 |
01:55:31.03 |
+00:40:33.6 |
HIP 8952 |
5.13 |
| 2026-07-30 00:00 |
01:55:30.73 |
+00:40:25.9 |
HIP 8952 |
4.98 |
| 2026-07-30 12:00 |
01:55:30.40 |
+00:40:18.2 |
HIP 8952 |
4.83 |
| 2026-07-31 00:00 |
01:55:30.05 |
+00:40:10.3 |
HIP 8952 |
4.67 |
| 2026-07-31 12:00 |
01:55:29.68 |
+00:40:02.3 |
HIP 8952 |
4.51 |
| 2026-08-01 00:00 |
01:55:29.29 |
+00:39:54.2 |
HIP 8952 |
4.34 |
| 2026-08-01 12:00 |
01:55:28.87 |
+00:39:46.0 |
HIP 8952 |
4.17 |
| 2026-08-02 00:00 |
01:55:28.44 |
+00:39:37.7 |
HIP 8952 |
3.99 |
| 2026-08-02 12:00 |
01:55:27.98 |
+00:39:29.3 |
HIP 8952 |
3.81 |
| 2026-08-03 00:00 |
01:55:27.51 |
+00:39:20.8 |
HIP 8952 |
3.63 |
| 2026-08-03 12:00 |
01:55:27.01 |
+00:39:12.2 |
HIP 8952 |
3.44 |
| 2026-08-04 00:00 |
01:55:26.49 |
+00:39:03.4 |
HIP 8952 |
3.24 |
| 2026-08-04 12:00 |
01:55:25.96 |
+00:38:54.6 |
HIP 8952 |
3.04 |
| 2026-08-05 00:00 |
01:55:25.40 |
+00:38:45.6 |
HIP 8952 |
2.84 |
| 2026-08-05 12:00 |
01:55:24.81 |
+00:38:36.6 |
HIP 8952 |
2.63 |
| 2026-08-06 00:00 |
01:55:24.21 |
+00:38:27.4 |
HIP 8952 |
2.42 |
| 2026-08-06 12:00 |
01:55:23.59 |
+00:38:18.2 |
HIP 8952 |
2.20 |
| 2026-08-07 00:00 |
01:55:22.95 |
+00:38:08.8 |
HIP 8952 |
1.98 |
| 2026-08-07 12:00 |
01:55:22.28 |
+00:37:59.4 |
HIP 8952 |
1.76 |
| 2026-08-08 00:00 |
01:55:21.60 |
+00:37:49.8 |
HIP 8952 |
1.53 |
| 2026-08-08 12:00 |
01:55:20.89 |
+00:37:40.1 |
HIP 8952 |
1.30 |
| 2026-08-09 00:00 |
01:55:20.16 |
+00:37:30.4 |
HIP 8952 |
1.08 |
| 2026-08-09 12:00 |
01:55:19.41 |
+00:37:20.5 |
HIP 8952 |
0.86 |
| 2026-08-10 00:00 |
01:55:18.64 |
+00:37:10.6 |
HIP 8952 |
0.66 |
| 2026-08-10 12:00 |
01:55:17.85 |
+00:37:00.5 |
HIP 8952 |
0.50 |
| 2026-08-11 00:00 |
01:55:17.04 |
+00:36:50.4 |
HIP 8952 |
0.46 |
| 2026-08-11 12:00 |
01:55:16.21 |
+00:36:40.1 |
HIP 8952 |
0.56 |
| 2026-08-12 00:00 |
01:55:15.36 |
+00:36:29.8 |
HIP 8952 |
0.76 |
| 2026-08-12 12:00 |
01:55:14.48 |
+00:36:19.3 |
HIP 8952 |
1.00 |
| 2026-08-13 00:00 |
01:55:13.59 |
+00:36:08.8 |
HIP 8952 |
1.26 |
| 2026-08-13 12:00 |
01:55:12.68 |
+00:35:58.2 |
HIP 8952 |
1.53 |
| 2026-08-14 00:00 |
01:55:11.74 |
+00:35:47.5 |
HIP 8952 |
1.82 |
| 2026-08-14 12:00 |
01:55:10.79 |
+00:35:36.7 |
HIP 8952 |
2.11 |
| 2026-08-15 00:00 |
01:55:09.81 |
+00:35:25.8 |
HIP 8952 |
2.41 |
| 2026-08-15 12:00 |
01:55:08.81 |
+00:35:14.8 |
HIP 8952 |
2.71 |
| 2026-08-16 00:00 |
01:55:07.80 |
+00:35:03.7 |
HIP 8952 |
3.02 |
| 2026-08-16 12:00 |
01:55:06.76 |
+00:34:52.6 |
HIP 8952 |
3.34 |
| 2026-08-17 00:00 |
01:55:05.71 |
+00:34:41.3 |
HIP 8952 |
3.66 |
| 2026-08-17 12:00 |
01:55:04.63 |
+00:34:30.0 |
HIP 8952 |
3.99 |
| 2026-08-18 00:00 |
01:55:03.53 |
+00:34:18.6 |
HIP 8952 |
4.32 |
| 2026-08-18 12:00 |
01:55:02.42 |
+00:34:07.1 |
HIP 8952 |
4.66 |
| 2026-08-19 00:00 |
01:55:01.28 |
+00:33:55.5 |
HIP 8952 |
5.00 |