メタデータ
| 項目 |
値 |
| Designation |
C/2003 G1 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2003-02-03T15:42:49.510080Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:27Z |
| Obs used |
1472 |
| NEO |
- |
| M1 |
6.200 |
| K1 |
9.750 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2003-08-25.0000000 |
| e |
1.00137916 |
| q (au) |
4.916288 |
| a (au) |
-3564.686955 |
| i (deg) |
66.849308 |
| Ω (om, deg) |
246.088785 |
| ω (w, deg) |
11.422485 |
| M (ma, deg) |
0.000937 |
等級
散乱 + 全体線形
$$
M_a = (1.546 + 5.811\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
1.546 |
| n |
5.811 |
| 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) |
| 2026-03-26 00:00 |
02:45:41.77 |
+43:23:43.3 |
HIP 13017 |
18.32 |
| 2026-03-26 12:00 |
02:45:44.85 |
+43:23:37.4 |
HIP 13017 |
17.76 |
| 2026-03-27 00:00 |
02:45:47.95 |
+43:23:31.7 |
HIP 13017 |
17.20 |
| 2026-03-27 12:00 |
02:45:51.07 |
+43:23:26.2 |
HIP 13017 |
16.64 |
| 2026-03-28 00:00 |
02:45:54.20 |
+43:23:20.9 |
HIP 13017 |
16.07 |
| 2026-03-28 12:00 |
02:45:57.36 |
+43:23:15.8 |
HIP 13017 |
15.51 |
| 2026-03-29 00:00 |
02:46:00.53 |
+43:23:10.8 |
HIP 13017 |
14.94 |
| 2026-03-29 12:00 |
02:46:03.72 |
+43:23:06.1 |
HIP 13017 |
14.36 |
| 2026-03-30 00:00 |
02:46:06.93 |
+43:23:01.5 |
HIP 13017 |
13.79 |
| 2026-03-30 12:00 |
02:46:10.15 |
+43:22:57.1 |
HIP 13017 |
13.21 |
| 2026-03-31 00:00 |
02:46:13.39 |
+43:22:52.9 |
HIP 13017 |
12.63 |
| 2026-03-31 12:00 |
02:46:16.65 |
+43:22:48.9 |
HIP 13017 |
12.05 |
| 2026-04-01 00:00 |
02:46:19.92 |
+43:22:45.1 |
HIP 13017 |
11.47 |
| 2026-04-01 12:00 |
02:46:23.21 |
+43:22:41.5 |
HIP 13017 |
10.88 |
| 2026-04-02 00:00 |
02:46:26.51 |
+43:22:38.0 |
HIP 13017 |
10.30 |
| 2026-04-02 12:00 |
02:46:29.83 |
+43:22:34.8 |
HIP 13017 |
9.71 |
| 2026-04-03 00:00 |
02:46:33.17 |
+43:22:31.7 |
HIP 13017 |
9.12 |
| 2026-04-03 12:00 |
02:46:36.52 |
+43:22:28.8 |
HIP 13017 |
8.53 |
| 2026-04-04 00:00 |
02:46:39.89 |
+43:22:26.1 |
HIP 13017 |
7.94 |
| 2026-04-04 12:00 |
02:46:43.27 |
+43:22:23.6 |
HIP 13017 |
7.35 |
| 2026-04-05 00:00 |
02:46:46.66 |
+43:22:21.3 |
HIP 13017 |
6.76 |
| 2026-04-05 12:00 |
02:46:50.07 |
+43:22:19.1 |
HIP 13017 |
6.18 |
| 2026-04-06 00:00 |
02:46:53.50 |
+43:22:17.2 |
HIP 13017 |
5.60 |
| 2026-04-06 12:00 |
02:46:56.93 |
+43:22:15.4 |
HIP 13017 |
5.02 |
| 2026-04-07 00:00 |
02:47:00.39 |
+43:22:13.8 |
HIP 13017 |
4.46 |
| 2026-04-07 12:00 |
02:47:03.85 |
+43:22:12.4 |
HIP 13017 |
3.91 |
| 2026-04-08 00:00 |
02:47:07.33 |
+43:22:11.2 |
HIP 13017 |
3.38 |
| 2026-04-08 12:00 |
02:47:10.82 |
+43:22:10.2 |
HIP 13017 |
2.90 |
| 2026-04-09 00:00 |
02:47:14.33 |
+43:22:09.3 |
HIP 13017 |
2.48 |
| 2026-04-09 12:00 |
02:47:17.84 |
+43:22:08.7 |
HIP 13017 |
2.16 |
| 2026-04-10 00:00 |
02:47:21.37 |
+43:22:08.2 |
HIP 13017 |
2.00 |
| 2026-04-10 12:00 |
02:47:24.91 |
+43:22:07.9 |
HIP 13017 |
2.04 |
| 2026-04-11 00:00 |
02:47:28.47 |
+43:22:07.7 |
HIP 13017 |
2.26 |
| 2026-04-11 12:00 |
02:47:32.03 |
+43:22:07.8 |
HIP 13017 |
2.63 |
| 2026-04-12 00:00 |
02:47:35.61 |
+43:22:08.1 |
HIP 13017 |
3.09 |
| 2026-04-12 12:00 |
02:47:39.20 |
+43:22:08.5 |
HIP 13017 |
3.61 |
| 2026-04-13 00:00 |
02:47:42.80 |
+43:22:09.1 |
HIP 13017 |
4.17 |
| 2026-04-13 12:00 |
02:47:46.41 |
+43:22:09.9 |
HIP 13017 |
4.75 |
| 2026-04-14 00:00 |
02:47:50.03 |
+43:22:10.8 |
HIP 13017 |
5.35 |
| 2026-04-14 12:00 |
02:47:53.66 |
+43:22:12.0 |
HIP 13017 |
5.97 |
| 2026-04-15 00:00 |
02:47:57.30 |
+43:22:13.3 |
HIP 13017 |
6.59 |
| 2026-04-15 12:00 |
02:48:00.95 |
+43:22:14.8 |
HIP 13017 |
7.22 |
| 2026-04-16 00:00 |
02:48:04.61 |
+43:22:16.5 |
HIP 13017 |
7.86 |