メタデータ
| 項目 |
値 |
| Designation |
C/2001 G1 (LONEOS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2001-10-09T05:10:18.793920Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:08Z |
| Obs used |
134 |
| NEO |
- |
| M1 |
9.800 |
| K1 |
4.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2002-01-12.0000000 |
| e |
1.00280088 |
| q (au) |
8.235531 |
| a (au) |
-2940.336115 |
| i (deg) |
45.364449 |
| Ω (om, deg) |
203.891133 |
| ω (w, deg) |
343.281547 |
| M (ma, deg) |
0.000586 |
等級
散乱 + 全体線形
$$
M_a = (8.467 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
8.467 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.506 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 2002-04-04 |
2004-05-28 |
-40.2814 |
+37.563 |
log10 r = log10(太陽距離/AU)、Δ = 地球距離(AU)
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
20:45:34.57 |
+25:50:37.1 |
HIP 102442 |
15.78 |
| 2026-05-12 12:00 |
20:45:34.27 |
+25:51:04.6 |
HIP 102442 |
15.32 |
| 2026-05-13 00:00 |
20:45:33.93 |
+25:51:31.9 |
HIP 102442 |
14.86 |
| 2026-05-13 12:00 |
20:45:33.58 |
+25:51:59.2 |
HIP 102442 |
14.40 |
| 2026-05-14 00:00 |
20:45:33.20 |
+25:52:26.3 |
HIP 102442 |
13.94 |
| 2026-05-14 12:00 |
20:45:32.79 |
+25:52:53.3 |
HIP 102442 |
13.49 |
| 2026-05-15 00:00 |
20:45:32.35 |
+25:53:20.2 |
HIP 102442 |
13.03 |
| 2026-05-15 12:00 |
20:45:31.89 |
+25:53:47.0 |
HIP 102442 |
12.58 |
| 2026-05-16 00:00 |
20:45:31.41 |
+25:54:13.6 |
HIP 102442 |
12.13 |
| 2026-05-16 12:00 |
20:45:30.90 |
+25:54:40.1 |
HIP 102442 |
11.69 |
| 2026-05-17 00:00 |
20:45:30.36 |
+25:55:06.5 |
HIP 102442 |
11.25 |
| 2026-05-17 12:00 |
20:45:29.80 |
+25:55:32.8 |
HIP 102442 |
10.81 |
| 2026-05-18 00:00 |
20:45:29.22 |
+25:55:58.9 |
HIP 102442 |
10.37 |
| 2026-05-18 12:00 |
20:45:28.61 |
+25:56:24.8 |
HIP 102442 |
9.94 |
| 2026-05-19 00:00 |
20:45:27.97 |
+25:56:50.6 |
HIP 102442 |
9.51 |
| 2026-05-19 12:00 |
20:45:27.31 |
+25:57:16.3 |
HIP 102442 |
9.09 |
| 2026-05-20 00:00 |
20:45:26.62 |
+25:57:41.9 |
HIP 102442 |
8.67 |
| 2026-05-20 12:00 |
20:45:25.91 |
+25:58:07.2 |
HIP 102442 |
8.26 |
| 2026-05-21 00:00 |
20:45:25.17 |
+25:58:32.5 |
HIP 102442 |
7.86 |
| 2026-05-21 12:00 |
20:45:24.41 |
+25:58:57.6 |
HIP 102442 |
7.47 |
| 2026-05-22 00:00 |
20:45:23.63 |
+25:59:22.5 |
HIP 102442 |
7.09 |
| 2026-05-22 12:00 |
20:45:22.82 |
+25:59:47.3 |
HIP 102442 |
6.72 |
| 2026-05-23 00:00 |
20:45:21.98 |
+26:00:11.9 |
HIP 102442 |
6.36 |
| 2026-05-23 12:00 |
20:45:21.13 |
+26:00:36.4 |
HIP 102442 |
6.03 |
| 2026-05-24 00:00 |
20:45:20.24 |
+26:01:00.7 |
HIP 102442 |
5.71 |
| 2026-05-24 12:00 |
20:45:19.34 |
+26:01:24.8 |
HIP 102442 |
5.41 |
| 2026-05-25 00:00 |
20:45:18.40 |
+26:01:48.8 |
HIP 102442 |
5.15 |
| 2026-05-25 12:00 |
20:45:17.45 |
+26:02:12.7 |
HIP 102442 |
4.91 |
| 2026-05-26 00:00 |
20:45:16.47 |
+26:02:36.3 |
HIP 102442 |
4.71 |
| 2026-05-26 12:00 |
20:45:15.47 |
+26:02:59.8 |
HIP 102442 |
4.56 |
| 2026-05-27 00:00 |
20:45:14.44 |
+26:03:23.1 |
HIP 102442 |
4.45 |
| 2026-05-27 12:00 |
20:45:13.39 |
+26:03:46.3 |
HIP 102442 |
4.39 |
| 2026-05-28 00:00 |
20:45:12.32 |
+26:04:09.3 |
HIP 102442 |
4.38 |
| 2026-05-28 12:00 |
20:45:11.22 |
+26:04:32.1 |
HIP 102442 |
4.43 |
| 2026-05-29 00:00 |
20:45:10.10 |
+26:04:54.7 |
HIP 102442 |
4.52 |
| 2026-05-29 12:00 |
20:45:08.96 |
+26:05:17.2 |
HIP 102442 |
4.67 |
| 2026-05-30 00:00 |
20:45:07.79 |
+26:05:39.5 |
HIP 102442 |
4.86 |
| 2026-05-30 12:00 |
20:45:06.60 |
+26:06:01.6 |
HIP 102442 |
5.09 |
| 2026-05-31 00:00 |
20:45:05.39 |
+26:06:23.5 |
HIP 102442 |
5.35 |
| 2026-05-31 12:00 |
20:45:04.16 |
+26:06:45.2 |
HIP 102442 |
5.64 |
| 2026-06-01 00:00 |
20:45:02.90 |
+26:07:06.8 |
HIP 102442 |
5.95 |
| 2026-06-01 12:00 |
20:45:01.62 |
+26:07:28.1 |
HIP 102442 |
6.29 |
| 2026-06-02 00:00 |
20:45:00.32 |
+26:07:49.3 |
HIP 102442 |
6.65 |