メタデータ
| 項目 |
値 |
| Designation |
P/2014 L2 (NEOWISE) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2014-07-15T10:00:57.260160Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:54Z |
| Obs used |
1130 |
| NEO |
- |
| M1 |
8.600 |
| K1 |
18.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2014-09-05.0000000 |
| e |
0.64676281 |
| q (au) |
2.234542 |
| a (au) |
6.325896 |
| i (deg) |
5.184412 |
| Ω (om, deg) |
149.405843 |
| ω (w, deg) |
182.777950 |
| M (ma, deg) |
3.195397 |
等級
散乱 + 全体線形
$$
M_a = (8.912 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
8.912 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| 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) |
| 2026-06-01 00:00 |
11:42:55.69 |
+04:54:56.6 |
HIP 57083 |
15.70 |
| 2026-06-01 12:00 |
11:42:55.03 |
+04:54:54.2 |
HIP 57083 |
15.55 |
| 2026-06-02 00:00 |
11:42:54.48 |
+04:54:51.2 |
HIP 57083 |
15.41 |
| 2026-06-02 12:00 |
11:42:54.04 |
+04:54:47.4 |
HIP 57083 |
15.29 |
| 2026-06-03 00:00 |
11:42:53.71 |
+04:54:42.9 |
HIP 57083 |
15.17 |
| 2026-06-03 12:00 |
11:42:53.48 |
+04:54:37.7 |
HIP 57083 |
15.08 |
| 2026-06-04 00:00 |
11:42:53.37 |
+04:54:31.8 |
HIP 57083 |
14.99 |
| 2026-06-04 12:00 |
11:42:53.36 |
+04:54:25.2 |
HIP 57083 |
14.92 |
| 2026-06-05 00:00 |
11:42:53.46 |
+04:54:17.9 |
HIP 57083 |
14.86 |
| 2026-06-05 12:00 |
11:42:53.66 |
+04:54:09.8 |
HIP 57083 |
14.81 |
| 2026-06-06 00:00 |
11:42:53.98 |
+04:54:01.1 |
HIP 57083 |
14.78 |
| 2026-06-06 12:00 |
11:42:54.40 |
+04:53:51.7 |
HIP 57083 |
14.77 |
| 2026-06-07 00:00 |
11:42:54.93 |
+04:53:41.6 |
HIP 57083 |
14.77 |
| 2026-06-07 12:00 |
11:42:55.57 |
+04:53:30.8 |
HIP 57083 |
14.79 |
| 2026-06-08 00:00 |
11:42:56.31 |
+04:53:19.2 |
HIP 57083 |
14.83 |
| 2026-06-08 12:00 |
11:42:57.16 |
+04:53:07.0 |
HIP 57083 |
14.89 |
| 2026-06-09 00:00 |
11:42:58.12 |
+04:52:54.1 |
HIP 57083 |
14.98 |
| 2026-06-09 12:00 |
11:42:59.19 |
+04:52:40.5 |
HIP 57083 |
15.08 |
| 2026-06-10 00:00 |
11:43:00.36 |
+04:52:26.2 |
HIP 57083 |
15.21 |
| 2026-06-10 12:00 |
11:43:01.64 |
+04:52:11.3 |
HIP 57083 |
15.37 |
| 2026-06-11 00:00 |
11:43:03.03 |
+04:51:55.6 |
HIP 57083 |
15.55 |
| 2026-06-11 12:00 |
11:43:04.53 |
+04:51:39.2 |
HIP 57083 |
15.76 |
| 2026-06-12 00:00 |
11:43:06.13 |
+04:51:22.2 |
HIP 57083 |
16.01 |
| 2026-06-12 12:00 |
11:43:07.83 |
+04:51:04.4 |
HIP 57083 |
16.28 |
| 2026-06-13 00:00 |
11:43:09.65 |
+04:50:46.0 |
HIP 57083 |
16.59 |
| 2026-06-13 12:00 |
11:43:11.57 |
+04:50:26.9 |
HIP 57083 |
16.93 |
| 2026-06-14 00:00 |
11:43:13.59 |
+04:50:07.2 |
HIP 57083 |
17.30 |
| 2026-06-14 12:00 |
11:43:15.72 |
+04:49:46.7 |
HIP 57083 |
17.71 |
| 2026-06-15 00:00 |
11:43:17.96 |
+04:49:25.6 |
HIP 57083 |
18.15 |
| 2026-06-15 12:00 |
11:43:20.30 |
+04:49:03.8 |
HIP 57083 |
18.63 |
| 2026-06-16 00:00 |
11:43:22.75 |
+04:48:41.3 |
HIP 57083 |
19.15 |
| 2026-06-16 12:00 |
11:43:25.30 |
+04:48:18.1 |
HIP 57083 |
19.70 |
| 2026-06-17 00:00 |
11:43:27.96 |
+04:47:54.3 |
HIP 57083 |
20.29 |
| 2026-06-17 12:00 |
11:43:30.72 |
+04:47:29.9 |
HIP 57083 |
20.91 |
| 2026-06-18 00:00 |
11:43:33.59 |
+04:47:04.7 |
HIP 57083 |
21.57 |
| 2026-06-18 12:00 |
11:43:36.56 |
+04:46:38.9 |
HIP 57083 |
22.27 |
| 2026-06-19 00:00 |
11:43:39.63 |
+04:46:12.5 |
HIP 57083 |
23.00 |
| 2026-06-19 12:00 |
11:43:42.80 |
+04:45:45.4 |
HIP 57083 |
23.77 |
| 2026-06-20 00:00 |
11:43:46.08 |
+04:45:17.6 |
HIP 57083 |
24.57 |
| 2026-06-20 12:00 |
11:43:49.46 |
+04:44:49.2 |
HIP 57083 |
25.41 |
| 2026-06-21 00:00 |
11:43:52.94 |
+04:44:20.2 |
HIP 57083 |
26.28 |
| 2026-06-21 12:00 |
11:43:56.53 |
+04:43:50.5 |
HIP 57083 |
27.19 |
| 2026-06-22 00:00 |
11:44:00.21 |
+04:43:20.2 |
HIP 57083 |
28.13 |