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
$$
M_a = (9.775 + 2.485\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
9.775 |
| n |
2.485 |
| gf |
0.916 |
| gb |
-0.978 |
| k |
1.000 |
| δ90 |
9.940 |
| 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 |
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 |
| 2026-06-02 12:00 |
08:55:46.91 |
+54:08:52.4 |
HIP 43718 |
16.88 |
| 2026-06-03 00:00 |
08:55:49.67 |
+54:08:26.2 |
HIP 43718 |
17.46 |
| 2026-06-03 12:00 |
08:55:52.46 |
+54:08:00.0 |
HIP 43718 |
18.05 |
| 2026-06-04 00:00 |
08:55:55.28 |
+54:07:33.9 |
HIP 43718 |
18.64 |
| 2026-06-04 12:00 |
08:55:58.14 |
+54:07:07.9 |
HIP 43718 |
19.23 |
| 2026-06-05 00:00 |
08:56:01.02 |
+54:06:41.9 |
HIP 43718 |
19.83 |
| 2026-06-05 12:00 |
08:56:03.95 |
+54:06:15.9 |
HIP 43718 |
20.44 |
| 2026-06-06 00:00 |
08:56:06.90 |
+54:05:50.0 |
HIP 43718 |
21.04 |
| 2026-06-06 12:00 |
08:56:09.89 |
+54:05:24.2 |
HIP 43718 |
21.65 |
| 2026-06-07 00:00 |
08:56:12.91 |
+54:04:58.4 |
HIP 43718 |
22.27 |
| 2026-06-07 12:00 |
08:56:15.96 |
+54:04:32.7 |
HIP 43718 |
22.89 |
| 2026-06-08 00:00 |
08:56:19.04 |
+54:04:07.0 |
HIP 43718 |
23.51 |
| 2026-06-08 12:00 |
08:56:22.16 |
+54:03:41.5 |
HIP 43718 |
24.13 |
| 2026-06-09 00:00 |
08:56:25.30 |
+54:03:15.9 |
HIP 43718 |
24.76 |
| 2026-06-09 12:00 |
08:56:28.48 |
+54:02:50.5 |
HIP 43718 |
25.38 |
| 2026-06-10 00:00 |
08:56:31.69 |
+54:02:25.1 |
HIP 44140 |
25.61 |
| 2026-06-10 12:00 |
08:56:34.93 |
+54:01:59.8 |
HIP 44140 |
25.07 |
| 2026-06-11 00:00 |
08:56:38.20 |
+54:01:34.6 |
HIP 44140 |
24.54 |
| 2026-06-11 12:00 |
08:56:41.50 |
+54:01:09.4 |
HIP 44140 |
24.01 |
| 2026-06-12 00:00 |
08:56:44.83 |
+54:00:44.3 |
HIP 44140 |
23.48 |
| 2026-06-12 12:00 |
08:56:48.19 |
+54:00:19.3 |
HIP 44140 |
22.95 |
| 2026-06-13 00:00 |
08:56:51.58 |
+53:59:54.4 |
HIP 44140 |
22.42 |
| 2026-06-13 12:00 |
08:56:55.00 |
+53:59:29.5 |
HIP 44140 |
21.89 |
| 2026-06-14 00:00 |
08:56:58.45 |
+53:59:04.7 |
HIP 44140 |
21.37 |
| 2026-06-14 12:00 |
08:57:01.93 |
+53:58:40.1 |
HIP 44140 |
20.85 |
| 2026-06-15 00:00 |
08:57:05.44 |
+53:58:15.5 |
HIP 44140 |
20.33 |
| 2026-06-15 12:00 |
08:57:08.97 |
+53:57:51.0 |
HIP 44140 |
19.82 |
| 2026-06-16 00:00 |
08:57:12.54 |
+53:57:26.6 |
HIP 44140 |
19.31 |
| 2026-06-16 12:00 |
08:57:16.13 |
+53:57:02.2 |
HIP 44140 |
18.81 |
| 2026-06-17 00:00 |
08:57:19.75 |
+53:56:38.0 |
HIP 44140 |
18.31 |
| 2026-06-17 12:00 |
08:57:23.40 |
+53:56:13.9 |
HIP 44140 |
17.82 |
| 2026-06-18 00:00 |
08:57:27.07 |
+53:55:49.8 |
HIP 44140 |
17.34 |
| 2026-06-18 12:00 |
08:57:30.78 |
+53:55:25.9 |
HIP 44140 |
16.86 |
| 2026-06-19 00:00 |
08:57:34.50 |
+53:55:02.1 |
HIP 44140 |
16.40 |
| 2026-06-19 12:00 |
08:57:38.26 |
+53:54:38.3 |
HIP 44140 |
15.95 |
| 2026-06-20 00:00 |
08:57:42.04 |
+53:54:14.7 |
HIP 44140 |
15.51 |
| 2026-06-20 12:00 |
08:57:45.85 |
+53:53:51.2 |
HIP 44140 |
15.08 |
| 2026-06-21 00:00 |
08:57:49.68 |
+53:53:27.8 |
HIP 44140 |
14.66 |
| 2026-06-21 12:00 |
08:57:53.54 |
+53:53:04.5 |
HIP 44140 |
14.27 |
| 2026-06-22 00:00 |
08:57:57.42 |
+53:52:41.3 |
HIP 44140 |
13.89 |