メタデータ
| 項目 |
値 |
| Designation |
C/2005 EL173 (LONEOS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2007-03-05T21:31:08.184000Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:47Z |
| Obs used |
314 |
| NEO |
- |
| M1 |
7.700 |
| K1 |
9.250 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2006-07-01.0000000 |
| e |
1.00318367 |
| q (au) |
3.886323 |
| a (au) |
-1220.704650 |
| i (deg) |
130.676676 |
| Ω (om, deg) |
344.789896 |
| ω (w, deg) |
261.492565 |
| M (ma, deg) |
-0.005729 |
等級
散乱 + 全体線形
$$
M_a = (5.147 + 4.894\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
5.147 |
| n |
4.894 |
| gf |
0.860 |
| gb |
-0.523 |
| k |
0.981 |
| δ90 |
1.001 |
| 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 |
20:26:17.54 |
+14:16:03.4 |
HIP 100781 |
21.70 |
| 2026-07-29 12:00 |
20:26:14.09 |
+14:15:54.4 |
HIP 100781 |
21.42 |
| 2026-07-30 00:00 |
20:26:10.64 |
+14:15:45.1 |
HIP 100781 |
21.16 |
| 2026-07-30 12:00 |
20:26:07.19 |
+14:15:35.5 |
HIP 100781 |
20.94 |
| 2026-07-31 00:00 |
20:26:03.75 |
+14:15:25.8 |
HIP 100781 |
20.74 |
| 2026-07-31 12:00 |
20:26:00.30 |
+14:15:15.8 |
HIP 100781 |
20.56 |
| 2026-08-01 00:00 |
20:25:56.86 |
+14:15:05.6 |
HIP 100781 |
20.42 |
| 2026-08-01 12:00 |
20:25:53.42 |
+14:14:55.2 |
HIP 100781 |
20.32 |
| 2026-08-02 00:00 |
20:25:49.99 |
+14:14:44.6 |
HIP 100781 |
20.24 |
| 2026-08-02 12:00 |
20:25:46.55 |
+14:14:33.7 |
HIP 100781 |
20.19 |
| 2026-08-03 00:00 |
20:25:43.12 |
+14:14:22.6 |
HIP 100781 |
20.18 |
| 2026-08-03 12:00 |
20:25:39.70 |
+14:14:11.3 |
HIP 100781 |
20.20 |
| 2026-08-04 00:00 |
20:25:36.27 |
+14:13:59.8 |
HIP 100781 |
20.25 |
| 2026-08-04 12:00 |
20:25:32.85 |
+14:13:48.1 |
HIP 100781 |
20.33 |
| 2026-08-05 00:00 |
20:25:29.44 |
+14:13:36.2 |
HIP 100781 |
20.45 |
| 2026-08-05 12:00 |
20:25:26.02 |
+14:13:24.0 |
HIP 100781 |
20.59 |
| 2026-08-06 00:00 |
20:25:22.62 |
+14:13:11.7 |
HIP 100781 |
20.77 |
| 2026-08-06 12:00 |
20:25:19.21 |
+14:12:59.1 |
HIP 100781 |
20.97 |
| 2026-08-07 00:00 |
20:25:15.81 |
+14:12:46.3 |
HIP 100781 |
21.21 |
| 2026-08-07 12:00 |
20:25:12.42 |
+14:12:33.3 |
HIP 100781 |
21.47 |
| 2026-08-08 00:00 |
20:25:09.03 |
+14:12:20.1 |
HIP 100781 |
21.76 |
| 2026-08-08 12:00 |
20:25:05.65 |
+14:12:06.7 |
HIP 100781 |
22.07 |
| 2026-08-09 00:00 |
20:25:02.28 |
+14:11:53.1 |
HIP 100781 |
22.41 |
| 2026-08-09 12:00 |
20:24:58.91 |
+14:11:39.3 |
HIP 100781 |
22.77 |
| 2026-08-10 00:00 |
20:24:55.54 |
+14:11:25.2 |
HIP 100781 |
23.15 |
| 2026-08-10 12:00 |
20:24:52.19 |
+14:11:11.0 |
HIP 100781 |
23.56 |
| 2026-08-11 00:00 |
20:24:48.84 |
+14:10:56.6 |
HIP 100781 |
23.98 |
| 2026-08-11 12:00 |
20:24:45.50 |
+14:10:41.9 |
HIP 100781 |
24.42 |
| 2026-08-12 00:00 |
20:24:42.16 |
+14:10:27.1 |
HIP 100781 |
24.88 |
| 2026-08-12 12:00 |
20:24:38.84 |
+14:10:12.0 |
HIP 100781 |
25.36 |
| 2026-08-13 00:00 |
20:24:35.52 |
+14:09:56.8 |
HIP 100781 |
25.85 |
| 2026-08-13 12:00 |
20:24:32.21 |
+14:09:41.4 |
HIP 100781 |
26.35 |
| 2026-08-14 00:00 |
20:24:28.90 |
+14:09:25.7 |
HIP 100781 |
26.87 |
| 2026-08-14 12:00 |
20:24:25.61 |
+14:09:09.9 |
HIP 100781 |
27.41 |
| 2026-08-15 00:00 |
20:24:22.33 |
+14:08:53.9 |
HIP 100781 |
27.95 |
| 2026-08-15 12:00 |
20:24:19.05 |
+14:08:37.7 |
HIP 100781 |
28.50 |
| 2026-08-16 00:00 |
20:24:15.79 |
+14:08:21.3 |
HIP 100781 |
29.07 |
| 2026-08-16 12:00 |
20:24:12.53 |
+14:08:04.7 |
HIP 100781 |
29.64 |
| 2026-08-17 00:00 |
20:24:09.28 |
+14:07:48.0 |
HIP 100781 |
30.22 |
| 2026-08-17 12:00 |
20:24:06.05 |
+14:07:31.0 |
HIP 100781 |
30.81 |
| 2026-08-18 00:00 |
20:24:02.82 |
+14:07:13.9 |
HIP 100511 |
30.97 |
| 2026-08-18 12:00 |
20:23:59.61 |
+14:06:56.6 |
HIP 100511 |
30.79 |
| 2026-08-19 00:00 |
20:23:56.41 |
+14:06:39.1 |
HIP 100511 |
30.64 |