メタデータ
| 項目 |
値 |
| Designation |
C/1999 G1 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1998-08-01T15:27:45.645120Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:57Z |
| Obs used |
76 |
| NEO |
- |
| M1 |
8.000 |
| 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) |
1999-04-12.0000000 |
| e |
0.85677293 |
| q (au) |
4.048556 |
| a (au) |
28.266698 |
| i (deg) |
76.568197 |
| Ω (om, deg) |
23.462057 |
| ω (w, deg) |
136.125424 |
| M (ma, deg) |
1.661583 |
等級
散乱 + 全体線形
$$
M_a = (12.052 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
12.052 |
| n |
2.000 |
| 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) |
| 2026-06-01 00:00 |
02:24:16.62 |
-53:40:47.6 |
HIP 11203 |
22.68 |
| 2026-06-01 12:00 |
02:24:20.74 |
-53:41:02.2 |
HIP 11203 |
22.45 |
| 2026-06-02 00:00 |
02:24:24.85 |
-53:41:17.0 |
HIP 11203 |
22.24 |
| 2026-06-02 12:00 |
02:24:28.93 |
-53:41:32.2 |
HIP 11203 |
22.03 |
| 2026-06-03 00:00 |
02:24:32.99 |
-53:41:47.7 |
HIP 11203 |
21.84 |
| 2026-06-03 12:00 |
02:24:37.03 |
-53:42:03.5 |
HIP 11203 |
21.65 |
| 2026-06-04 00:00 |
02:24:41.04 |
-53:42:19.7 |
HIP 11203 |
21.48 |
| 2026-06-04 12:00 |
02:24:45.04 |
-53:42:36.1 |
HIP 11203 |
21.33 |
| 2026-06-05 00:00 |
02:24:49.01 |
-53:42:52.9 |
HIP 11203 |
21.18 |
| 2026-06-05 12:00 |
02:24:52.96 |
-53:43:10.1 |
HIP 11203 |
21.05 |
| 2026-06-06 00:00 |
02:24:56.89 |
-53:43:27.5 |
HIP 11203 |
20.93 |
| 2026-06-06 12:00 |
02:25:00.79 |
-53:43:45.2 |
HIP 11203 |
20.82 |
| 2026-06-07 00:00 |
02:25:04.67 |
-53:44:03.3 |
HIP 11203 |
20.73 |
| 2026-06-07 12:00 |
02:25:08.53 |
-53:44:21.7 |
HIP 11203 |
20.65 |
| 2026-06-08 00:00 |
02:25:12.36 |
-53:44:40.4 |
HIP 11203 |
20.59 |
| 2026-06-08 12:00 |
02:25:16.17 |
-53:44:59.4 |
HIP 11203 |
20.54 |
| 2026-06-09 00:00 |
02:25:19.95 |
-53:45:18.7 |
HIP 11203 |
20.50 |
| 2026-06-09 12:00 |
02:25:23.71 |
-53:45:38.4 |
HIP 11203 |
20.48 |
| 2026-06-10 00:00 |
02:25:27.44 |
-53:45:58.3 |
HIP 11203 |
20.47 |
| 2026-06-10 12:00 |
02:25:31.15 |
-53:46:18.6 |
HIP 11203 |
20.47 |
| 2026-06-11 00:00 |
02:25:34.83 |
-53:46:39.1 |
HIP 11203 |
20.49 |
| 2026-06-11 12:00 |
02:25:38.49 |
-53:47:00.0 |
HIP 11203 |
20.52 |
| 2026-06-12 00:00 |
02:25:42.12 |
-53:47:21.2 |
HIP 11203 |
20.56 |
| 2026-06-12 12:00 |
02:25:45.72 |
-53:47:42.7 |
HIP 11203 |
20.62 |
| 2026-06-13 00:00 |
02:25:49.30 |
-53:48:04.4 |
HIP 11203 |
20.69 |
| 2026-06-13 12:00 |
02:25:52.85 |
-53:48:26.5 |
HIP 11203 |
20.78 |
| 2026-06-14 00:00 |
02:25:56.37 |
-53:48:48.9 |
HIP 11203 |
20.87 |
| 2026-06-14 12:00 |
02:25:59.86 |
-53:49:11.6 |
HIP 11203 |
20.98 |
| 2026-06-15 00:00 |
02:26:03.33 |
-53:49:34.5 |
HIP 11203 |
21.10 |
| 2026-06-15 12:00 |
02:26:06.77 |
-53:49:57.8 |
HIP 11203 |
21.24 |
| 2026-06-16 00:00 |
02:26:10.18 |
-53:50:21.3 |
HIP 11203 |
21.38 |
| 2026-06-16 12:00 |
02:26:13.56 |
-53:50:45.2 |
HIP 11203 |
21.54 |
| 2026-06-17 00:00 |
02:26:16.91 |
-53:51:09.3 |
HIP 11203 |
21.71 |
| 2026-06-17 12:00 |
02:26:20.23 |
-53:51:33.7 |
HIP 11203 |
21.89 |
| 2026-06-18 00:00 |
02:26:23.52 |
-53:51:58.4 |
HIP 11203 |
22.08 |
| 2026-06-18 12:00 |
02:26:26.79 |
-53:52:23.4 |
HIP 11203 |
22.27 |
| 2026-06-19 00:00 |
02:26:30.02 |
-53:52:48.7 |
HIP 11203 |
22.48 |
| 2026-06-19 12:00 |
02:26:33.22 |
-53:53:14.2 |
HIP 11203 |
22.70 |
| 2026-06-20 00:00 |
02:26:36.39 |
-53:53:40.0 |
HIP 11203 |
22.93 |
| 2026-06-20 12:00 |
02:26:39.53 |
-53:54:06.1 |
HIP 11203 |
23.17 |
| 2026-06-21 00:00 |
02:26:42.64 |
-53:54:32.4 |
HIP 11203 |
23.41 |
| 2026-06-21 12:00 |
02:26:45.72 |
-53:54:59.1 |
HIP 11203 |
23.67 |
| 2026-06-22 00:00 |
02:26:48.77 |
-53:55:26.0 |
HIP 11203 |
23.93 |