メタデータ
| 項目 |
値 |
| Designation |
C/2003 L2 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2004-01-19T04:34:34.224960Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:31Z |
| Obs used |
492 |
| NEO |
- |
| M1 |
12.700 |
| 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) |
2003-09-17.0000000 |
| e |
0.98145123 |
| q (au) |
2.864798 |
| a (au) |
154.446795 |
| i (deg) |
82.051084 |
| Ω (om, deg) |
273.559217 |
| ω (w, deg) |
119.840959 |
| M (ma, deg) |
359.936229 |
等級
散乱 + 全体線形
$$
M_a = (9.617 + 3.294\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
9.617 |
| n |
3.294 |
| gf |
1.000 |
| gb |
-0.817 |
| 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) |
| 2026-07-29 00:00 |
07:25:33.94 |
-65:31:00.4 |
HIP 36155 |
9.80 |
| 2026-07-29 12:00 |
07:25:40.58 |
-65:31:15.4 |
HIP 36155 |
9.08 |
| 2026-07-30 00:00 |
07:25:47.20 |
-65:31:30.7 |
HIP 36155 |
8.36 |
| 2026-07-30 12:00 |
07:25:53.81 |
-65:31:46.3 |
HIP 36155 |
7.64 |
| 2026-07-31 00:00 |
07:26:00.40 |
-65:32:02.2 |
HIP 36155 |
6.92 |
| 2026-07-31 12:00 |
07:26:06.97 |
-65:32:18.4 |
HIP 36155 |
6.21 |
| 2026-08-01 00:00 |
07:26:13.53 |
-65:32:35.0 |
HIP 36155 |
5.50 |
| 2026-08-01 12:00 |
07:26:20.07 |
-65:32:51.9 |
HIP 36155 |
4.79 |
| 2026-08-02 00:00 |
07:26:26.60 |
-65:33:09.1 |
HIP 36155 |
4.09 |
| 2026-08-02 12:00 |
07:26:33.10 |
-65:33:26.6 |
HIP 36155 |
3.40 |
| 2026-08-03 00:00 |
07:26:39.59 |
-65:33:44.5 |
HIP 36155 |
2.73 |
| 2026-08-03 12:00 |
07:26:46.07 |
-65:34:02.7 |
HIP 36155 |
2.09 |
| 2026-08-04 00:00 |
07:26:52.52 |
-65:34:21.2 |
HIP 36155 |
1.55 |
| 2026-08-04 12:00 |
07:26:58.95 |
-65:34:40.0 |
HIP 36155 |
1.22 |
| 2026-08-05 00:00 |
07:27:05.37 |
-65:34:59.1 |
HIP 36155 |
1.28 |
| 2026-08-05 12:00 |
07:27:11.76 |
-65:35:18.5 |
HIP 36155 |
1.69 |
| 2026-08-06 00:00 |
07:27:18.14 |
-65:35:38.3 |
HIP 36155 |
2.27 |
| 2026-08-06 12:00 |
07:27:24.49 |
-65:35:58.3 |
HIP 36155 |
2.92 |
| 2026-08-07 00:00 |
07:27:30.83 |
-65:36:18.7 |
HIP 36155 |
3.60 |
| 2026-08-07 12:00 |
07:27:37.14 |
-65:36:39.4 |
HIP 36155 |
4.30 |
| 2026-08-08 00:00 |
07:27:43.43 |
-65:37:00.4 |
HIP 36155 |
5.00 |
| 2026-08-08 12:00 |
07:27:49.70 |
-65:37:21.7 |
HIP 36155 |
5.72 |
| 2026-08-09 00:00 |
07:27:55.95 |
-65:37:43.3 |
HIP 36155 |
6.44 |
| 2026-08-09 12:00 |
07:28:02.17 |
-65:38:05.3 |
HIP 36155 |
7.16 |
| 2026-08-10 00:00 |
07:28:08.37 |
-65:38:27.5 |
HIP 36155 |
7.88 |
| 2026-08-10 12:00 |
07:28:14.55 |
-65:38:50.1 |
HIP 36155 |
8.61 |
| 2026-08-11 00:00 |
07:28:20.70 |
-65:39:12.9 |
HIP 36155 |
9.34 |
| 2026-08-11 12:00 |
07:28:26.82 |
-65:39:36.1 |
HIP 36155 |
10.07 |
| 2026-08-12 00:00 |
07:28:32.93 |
-65:39:59.5 |
HIP 36155 |
10.80 |
| 2026-08-12 12:00 |
07:28:39.00 |
-65:40:23.3 |
HIP 36155 |
11.53 |
| 2026-08-13 00:00 |
07:28:45.05 |
-65:40:47.4 |
HIP 36155 |
12.26 |
| 2026-08-13 12:00 |
07:28:51.08 |
-65:41:11.7 |
HIP 36155 |
12.99 |
| 2026-08-14 00:00 |
07:28:57.08 |
-65:41:36.4 |
HIP 36155 |
13.72 |
| 2026-08-14 12:00 |
07:29:03.05 |
-65:42:01.3 |
HIP 36155 |
14.45 |
| 2026-08-15 00:00 |
07:29:08.99 |
-65:42:26.6 |
HIP 36567 |
14.45 |
| 2026-08-15 12:00 |
07:29:14.90 |
-65:42:52.1 |
HIP 36567 |
14.07 |
| 2026-08-16 00:00 |
07:29:20.79 |
-65:43:18.0 |
HIP 36567 |
13.72 |
| 2026-08-16 12:00 |
07:29:26.65 |
-65:43:44.1 |
HIP 36567 |
13.40 |
| 2026-08-17 00:00 |
07:29:32.48 |
-65:44:10.5 |
HIP 36567 |
13.13 |
| 2026-08-17 12:00 |
07:29:38.28 |
-65:44:37.2 |
HIP 36567 |
12.90 |
| 2026-08-18 00:00 |
07:29:44.04 |
-65:45:04.2 |
HIP 36567 |
12.71 |
| 2026-08-18 12:00 |
07:29:49.78 |
-65:45:31.4 |
HIP 36567 |
12.57 |
| 2026-08-19 00:00 |
07:29:55.49 |
-65:45:59.0 |
HIP 36567 |
12.48 |