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
$$
M_a = (16.219 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
16.219 |
| n |
6.000 |
| gf |
0.998 |
| gb |
-0.598 |
| k |
0.967 |
| δ90 |
8.030 |
| 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 |
01:52:27.04 |
+00:34:52.8 |
HIP 8815 |
17.90 |
| 2026-05-12 12:00 |
01:52:29.30 |
+00:35:04.4 |
HIP 8815 |
17.64 |
| 2026-05-13 00:00 |
01:52:31.56 |
+00:35:15.9 |
HIP 8815 |
17.39 |
| 2026-05-13 12:00 |
01:52:33.80 |
+00:35:27.2 |
HIP 8815 |
17.16 |
| 2026-05-14 00:00 |
01:52:36.04 |
+00:35:38.5 |
HIP 8815 |
16.95 |
| 2026-05-14 12:00 |
01:52:38.28 |
+00:35:49.6 |
HIP 8815 |
16.76 |
| 2026-05-15 00:00 |
01:52:40.50 |
+00:36:00.7 |
HIP 8815 |
16.58 |
| 2026-05-15 12:00 |
01:52:42.72 |
+00:36:11.6 |
HIP 8815 |
16.42 |
| 2026-05-16 00:00 |
01:52:44.92 |
+00:36:22.5 |
HIP 8815 |
16.29 |
| 2026-05-16 12:00 |
01:52:47.12 |
+00:36:33.2 |
HIP 8815 |
16.17 |
| 2026-05-17 00:00 |
01:52:49.31 |
+00:36:43.8 |
HIP 8815 |
16.07 |
| 2026-05-17 12:00 |
01:52:51.49 |
+00:36:54.3 |
HIP 8815 |
15.99 |
| 2026-05-18 00:00 |
01:52:53.67 |
+00:37:04.8 |
HIP 8815 |
15.93 |
| 2026-05-18 12:00 |
01:52:55.83 |
+00:37:15.1 |
HIP 8815 |
15.89 |
| 2026-05-19 00:00 |
01:52:57.98 |
+00:37:25.3 |
HIP 8815 |
15.87 |
| 2026-05-19 12:00 |
01:53:00.13 |
+00:37:35.3 |
HIP 8815 |
15.86 |
| 2026-05-20 00:00 |
01:53:02.26 |
+00:37:45.3 |
HIP 8815 |
15.88 |
| 2026-05-20 12:00 |
01:53:04.39 |
+00:37:55.2 |
HIP 8815 |
15.91 |
| 2026-05-21 00:00 |
01:53:06.50 |
+00:38:04.9 |
HIP 8815 |
15.97 |
| 2026-05-21 12:00 |
01:53:08.61 |
+00:38:14.6 |
HIP 8815 |
16.04 |
| 2026-05-22 00:00 |
01:53:10.70 |
+00:38:24.1 |
HIP 8815 |
16.12 |
| 2026-05-22 12:00 |
01:53:12.79 |
+00:38:33.5 |
HIP 8815 |
16.23 |
| 2026-05-23 00:00 |
01:53:14.86 |
+00:38:42.8 |
HIP 8815 |
16.34 |
| 2026-05-23 12:00 |
01:53:16.92 |
+00:38:52.0 |
HIP 8815 |
16.48 |
| 2026-05-24 00:00 |
01:53:18.98 |
+00:39:01.1 |
HIP 8815 |
16.63 |
| 2026-05-24 12:00 |
01:53:21.02 |
+00:39:10.0 |
HIP 8815 |
16.79 |
| 2026-05-25 00:00 |
01:53:23.05 |
+00:39:18.9 |
HIP 8815 |
16.96 |
| 2026-05-25 12:00 |
01:53:25.07 |
+00:39:27.6 |
HIP 8815 |
17.15 |
| 2026-05-26 00:00 |
01:53:27.07 |
+00:39:36.2 |
HIP 8815 |
17.35 |
| 2026-05-26 12:00 |
01:53:29.07 |
+00:39:44.7 |
HIP 8815 |
17.56 |
| 2026-05-27 00:00 |
01:53:31.06 |
+00:39:53.1 |
HIP 8815 |
17.78 |
| 2026-05-27 12:00 |
01:53:33.03 |
+00:40:01.4 |
HIP 8815 |
18.01 |
| 2026-05-28 00:00 |
01:53:34.99 |
+00:40:09.5 |
HIP 8815 |
18.25 |
| 2026-05-28 12:00 |
01:53:36.94 |
+00:40:17.6 |
HIP 8815 |
18.50 |
| 2026-05-29 00:00 |
01:53:38.88 |
+00:40:25.5 |
HIP 8815 |
18.75 |
| 2026-05-29 12:00 |
01:53:40.80 |
+00:40:33.3 |
HIP 8815 |
19.01 |
| 2026-05-30 00:00 |
01:53:42.72 |
+00:40:41.0 |
HIP 8815 |
19.28 |
| 2026-05-30 12:00 |
01:53:44.62 |
+00:40:48.5 |
HIP 8815 |
19.55 |
| 2026-05-31 00:00 |
01:53:46.50 |
+00:40:56.0 |
HIP 8815 |
19.83 |
| 2026-05-31 12:00 |
01:53:48.38 |
+00:41:03.3 |
HIP 8815 |
20.12 |
| 2026-06-01 00:00 |
01:53:50.24 |
+00:41:10.5 |
HIP 8815 |
20.41 |
| 2026-06-01 12:00 |
01:53:52.09 |
+00:41:17.6 |
HIP 8815 |
20.70 |
| 2026-06-02 00:00 |
01:53:53.93 |
+00:41:24.5 |
HIP 8815 |
21.00 |