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) |
| 2026-05-12 00:00 |
08:54:22.92 |
+54:28:00.5 |
HIP 43718 |
9.38 |
| 2026-05-12 12:00 |
08:54:24.05 |
+54:27:33.9 |
HIP 43718 |
8.97 |
| 2026-05-13 00:00 |
08:54:25.23 |
+54:27:07.2 |
HIP 43718 |
8.56 |
| 2026-05-13 12:00 |
08:54:26.44 |
+54:26:40.6 |
HIP 43718 |
8.17 |
| 2026-05-14 00:00 |
08:54:27.70 |
+54:26:13.9 |
HIP 43718 |
7.78 |
| 2026-05-14 12:00 |
08:54:29.00 |
+54:25:47.1 |
HIP 43718 |
7.41 |
| 2026-05-15 00:00 |
08:54:30.33 |
+54:25:20.4 |
HIP 43718 |
7.06 |
| 2026-05-15 12:00 |
08:54:31.71 |
+54:24:53.6 |
HIP 43718 |
6.72 |
| 2026-05-16 00:00 |
08:54:33.13 |
+54:24:26.9 |
HIP 43718 |
6.40 |
| 2026-05-16 12:00 |
08:54:34.59 |
+54:24:00.1 |
HIP 43718 |
6.12 |
| 2026-05-17 00:00 |
08:54:36.09 |
+54:23:33.2 |
HIP 43718 |
5.86 |
| 2026-05-17 12:00 |
08:54:37.63 |
+54:23:06.4 |
HIP 43718 |
5.63 |
| 2026-05-18 00:00 |
08:54:39.21 |
+54:22:39.6 |
HIP 43718 |
5.45 |
| 2026-05-18 12:00 |
08:54:40.83 |
+54:22:12.7 |
HIP 43718 |
5.32 |
| 2026-05-19 00:00 |
08:54:42.49 |
+54:21:45.8 |
HIP 43718 |
5.23 |
| 2026-05-19 12:00 |
08:54:44.18 |
+54:21:19.0 |
HIP 43718 |
5.20 |
| 2026-05-20 00:00 |
08:54:45.92 |
+54:20:52.1 |
HIP 43718 |
5.22 |
| 2026-05-20 12:00 |
08:54:47.70 |
+54:20:25.2 |
HIP 43718 |
5.30 |
| 2026-05-21 00:00 |
08:54:49.51 |
+54:19:58.4 |
HIP 43718 |
5.43 |
| 2026-05-21 12:00 |
08:54:51.36 |
+54:19:31.5 |
HIP 43718 |
5.62 |
| 2026-05-22 00:00 |
08:54:53.26 |
+54:19:04.6 |
HIP 43718 |
5.85 |
| 2026-05-22 12:00 |
08:54:55.19 |
+54:18:37.8 |
HIP 43718 |
6.12 |
| 2026-05-23 00:00 |
08:54:57.15 |
+54:18:10.9 |
HIP 43718 |
6.43 |
| 2026-05-23 12:00 |
08:54:59.16 |
+54:17:44.1 |
HIP 43718 |
6.78 |
| 2026-05-24 00:00 |
08:55:01.20 |
+54:17:17.3 |
HIP 43718 |
7.15 |
| 2026-05-24 12:00 |
08:55:03.28 |
+54:16:50.5 |
HIP 43718 |
7.55 |
| 2026-05-25 00:00 |
08:55:05.40 |
+54:16:23.7 |
HIP 43718 |
7.97 |
| 2026-05-25 12:00 |
08:55:07.55 |
+54:15:56.9 |
HIP 43718 |
8.41 |
| 2026-05-26 00:00 |
08:55:09.75 |
+54:15:30.2 |
HIP 43718 |
8.86 |
| 2026-05-26 12:00 |
08:55:11.97 |
+54:15:03.4 |
HIP 43718 |
9.33 |
| 2026-05-27 00:00 |
08:55:14.24 |
+54:14:36.7 |
HIP 43718 |
9.82 |
| 2026-05-27 12:00 |
08:55:16.54 |
+54:14:10.0 |
HIP 43718 |
10.31 |
| 2026-05-28 00:00 |
08:55:18.88 |
+54:13:43.4 |
HIP 43718 |
10.82 |
| 2026-05-28 12:00 |
08:55:21.25 |
+54:13:16.8 |
HIP 43718 |
11.33 |
| 2026-05-29 00:00 |
08:55:23.66 |
+54:12:50.2 |
HIP 43718 |
11.86 |
| 2026-05-29 12:00 |
08:55:26.10 |
+54:12:23.6 |
HIP 43718 |
12.39 |
| 2026-05-30 00:00 |
08:55:28.58 |
+54:11:57.1 |
HIP 43718 |
12.93 |
| 2026-05-30 12:00 |
08:55:31.10 |
+54:11:30.6 |
HIP 43718 |
13.48 |
| 2026-05-31 00:00 |
08:55:33.65 |
+54:11:04.1 |
HIP 43718 |
14.03 |
| 2026-05-31 12:00 |
08:55:36.23 |
+54:10:37.7 |
HIP 43718 |
14.59 |
| 2026-06-01 00:00 |
08:55:38.85 |
+54:10:11.3 |
HIP 43718 |
15.15 |
| 2026-06-01 12:00 |
08:55:41.50 |
+54:09:44.9 |
HIP 43718 |
15.72 |
| 2026-06-02 00:00 |
08:55:44.19 |
+54:09:18.7 |
HIP 43718 |
16.30 |