メタデータ
| 項目 |
値 |
| Designation |
C/2004 L2 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2005-11-15T02:27:00.152640Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:42Z |
| Obs used |
303 |
| NEO |
- |
| M1 |
8.000 |
| K1 |
9.500 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2005-11-03.0000000 |
| e |
0.99521643 |
| q (au) |
3.778628 |
| a (au) |
789.918609 |
| i (deg) |
62.518634 |
| Ω (om, deg) |
99.180087 |
| ω (w, deg) |
257.311401 |
| M (ma, deg) |
359.999463 |
等級
散乱 + 全体線形
$$
M_a = (10.395 + 2.060\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
10.395 |
| n |
2.060 |
| gf |
1.000 |
| gb |
-0.835 |
| 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 |
08:55:46.26 |
+55:02:36.4 |
HIP 43981 |
18.19 |
| 2026-03-26 12:00 |
08:55:43.43 |
+55:02:21.6 |
HIP 43981 |
18.35 |
| 2026-03-27 00:00 |
08:55:40.64 |
+55:02:06.5 |
HIP 43981 |
18.50 |
| 2026-03-27 12:00 |
08:55:37.90 |
+55:01:51.3 |
HIP 43981 |
18.67 |
| 2026-03-28 00:00 |
08:55:35.19 |
+55:01:35.9 |
HIP 43981 |
18.83 |
| 2026-03-28 12:00 |
08:55:32.52 |
+55:01:20.2 |
HIP 43981 |
19.00 |
| 2026-03-29 00:00 |
08:55:29.89 |
+55:01:04.4 |
HIP 43981 |
19.17 |
| 2026-03-29 12:00 |
08:55:27.30 |
+55:00:48.3 |
HIP 43981 |
19.35 |
| 2026-03-30 00:00 |
08:55:24.74 |
+55:00:32.1 |
HIP 43981 |
19.53 |
| 2026-03-30 12:00 |
08:55:22.23 |
+55:00:15.6 |
HIP 43630 |
19.50 |
| 2026-03-31 00:00 |
08:55:19.76 |
+54:59:58.9 |
HIP 43630 |
19.11 |
| 2026-03-31 12:00 |
08:55:17.32 |
+54:59:42.1 |
HIP 43630 |
18.72 |
| 2026-04-01 00:00 |
08:55:14.93 |
+54:59:25.0 |
HIP 43630 |
18.35 |
| 2026-04-01 12:00 |
08:55:12.58 |
+54:59:07.8 |
HIP 43630 |
17.98 |
| 2026-04-02 00:00 |
08:55:10.27 |
+54:58:50.3 |
HIP 43630 |
17.62 |
| 2026-04-02 12:00 |
08:55:07.99 |
+54:58:32.7 |
HIP 43630 |
17.27 |
| 2026-04-03 00:00 |
08:55:05.76 |
+54:58:14.9 |
HIP 43630 |
16.93 |
| 2026-04-03 12:00 |
08:55:03.57 |
+54:57:56.9 |
HIP 43630 |
16.60 |
| 2026-04-04 00:00 |
08:55:01.42 |
+54:57:38.7 |
HIP 43630 |
16.28 |
| 2026-04-04 12:00 |
08:54:59.31 |
+54:57:20.3 |
HIP 43630 |
15.98 |
| 2026-04-05 00:00 |
08:54:57.24 |
+54:57:01.8 |
HIP 43630 |
15.68 |
| 2026-04-05 12:00 |
08:54:55.21 |
+54:56:43.1 |
HIP 43630 |
15.40 |
| 2026-04-06 00:00 |
08:54:53.23 |
+54:56:24.1 |
HIP 43630 |
15.13 |
| 2026-04-06 12:00 |
08:54:51.28 |
+54:56:05.1 |
HIP 43630 |
14.87 |
| 2026-04-07 00:00 |
08:54:49.38 |
+54:55:45.8 |
HIP 43630 |
14.62 |
| 2026-04-07 12:00 |
08:54:47.52 |
+54:55:26.4 |
HIP 43630 |
14.39 |
| 2026-04-08 00:00 |
08:54:45.70 |
+54:55:06.8 |
HIP 43630 |
14.18 |
| 2026-04-08 12:00 |
08:54:43.92 |
+54:54:47.0 |
HIP 43630 |
13.98 |
| 2026-04-09 00:00 |
08:54:42.19 |
+54:54:27.0 |
HIP 43630 |
13.80 |
| 2026-04-09 12:00 |
08:54:40.49 |
+54:54:06.9 |
HIP 43630 |
13.63 |
| 2026-04-10 00:00 |
08:54:38.84 |
+54:53:46.7 |
HIP 43630 |
13.48 |
| 2026-04-10 12:00 |
08:54:37.23 |
+54:53:26.2 |
HIP 43630 |
13.35 |
| 2026-04-11 00:00 |
08:54:35.67 |
+54:53:05.6 |
HIP 43630 |
13.24 |
| 2026-04-11 12:00 |
08:54:34.14 |
+54:52:44.9 |
HIP 43630 |
13.14 |
| 2026-04-12 00:00 |
08:54:32.66 |
+54:52:24.0 |
HIP 43630 |
13.07 |
| 2026-04-12 12:00 |
08:54:31.22 |
+54:52:02.9 |
HIP 43630 |
13.01 |
| 2026-04-13 00:00 |
08:54:29.83 |
+54:51:41.7 |
HIP 43630 |
12.97 |
| 2026-04-13 12:00 |
08:54:28.48 |
+54:51:20.3 |
HIP 43630 |
12.95 |
| 2026-04-14 00:00 |
08:54:27.17 |
+54:50:58.8 |
HIP 43630 |
12.96 |
| 2026-04-14 12:00 |
08:54:25.90 |
+54:50:37.1 |
HIP 43630 |
12.98 |
| 2026-04-15 00:00 |
08:54:24.68 |
+54:50:15.3 |
HIP 43630 |
13.01 |
| 2026-04-15 12:00 |
08:54:23.50 |
+54:49:53.4 |
HIP 43630 |
13.07 |
| 2026-04-16 00:00 |
08:54:22.36 |
+54:49:31.3 |
HIP 43630 |
13.15 |