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) |
| 2026-03-26 00:00 |
11:58:28.46 |
+03:20:35.1 |
HIP 58377 |
9.09 |
| 2026-03-26 12:00 |
11:58:17.50 |
+03:21:49.7 |
HIP 58377 |
7.15 |
| 2026-03-27 00:00 |
11:58:06.55 |
+03:23:04.0 |
HIP 58377 |
6.14 |
| 2026-03-27 12:00 |
11:57:55.62 |
+03:24:18.2 |
HIP 58377 |
6.50 |
| 2026-03-28 00:00 |
11:57:44.70 |
+03:25:32.1 |
HIP 58377 |
8.04 |
| 2026-03-28 12:00 |
11:57:33.80 |
+03:26:45.8 |
HIP 58377 |
10.24 |
| 2026-03-29 00:00 |
11:57:22.91 |
+03:27:59.2 |
HIP 58377 |
12.76 |
| 2026-03-29 12:00 |
11:57:12.04 |
+03:29:12.5 |
HIP 58377 |
15.44 |
| 2026-03-30 00:00 |
11:57:01.19 |
+03:30:25.5 |
HIP 58377 |
18.21 |
| 2026-03-30 12:00 |
11:56:50.37 |
+03:31:38.2 |
HIP 58377 |
21.03 |
| 2026-03-31 00:00 |
11:56:39.56 |
+03:32:50.7 |
HIP 58377 |
23.87 |
| 2026-03-31 12:00 |
11:56:28.78 |
+03:34:02.9 |
HIP 58377 |
26.73 |
| 2026-04-01 00:00 |
11:56:18.02 |
+03:35:14.8 |
HIP 58113 |
28.32 |
| 2026-04-01 12:00 |
11:56:07.29 |
+03:36:26.4 |
HIP 58113 |
27.73 |
| 2026-04-02 00:00 |
11:55:56.59 |
+03:37:37.7 |
HIP 58113 |
27.44 |
| 2026-04-02 12:00 |
11:55:45.91 |
+03:38:48.8 |
HIP 58224 |
27.32 |
| 2026-04-03 00:00 |
11:55:35.27 |
+03:39:59.5 |
HIP 58224 |
27.46 |
| 2026-04-03 12:00 |
11:55:24.65 |
+03:41:09.9 |
HIP 58061 |
25.25 |
| 2026-04-04 00:00 |
11:55:14.07 |
+03:42:20.0 |
HIP 58061 |
22.87 |
| 2026-04-04 12:00 |
11:55:03.52 |
+03:43:29.7 |
HIP 58061 |
20.63 |
| 2026-04-05 00:00 |
11:54:53.01 |
+03:44:39.1 |
HIP 58061 |
18.58 |
| 2026-04-05 12:00 |
11:54:42.53 |
+03:45:48.1 |
HIP 58061 |
16.77 |
| 2026-04-06 00:00 |
11:54:32.09 |
+03:46:56.8 |
HIP 58061 |
15.30 |
| 2026-04-06 12:00 |
11:54:21.69 |
+03:48:05.2 |
HIP 58061 |
14.25 |
| 2026-04-07 00:00 |
11:54:11.33 |
+03:49:13.1 |
HIP 58061 |
13.71 |
| 2026-04-07 12:00 |
11:54:01.01 |
+03:50:20.7 |
HIP 58061 |
13.75 |
| 2026-04-08 00:00 |
11:53:50.73 |
+03:51:27.9 |
HIP 58061 |
14.35 |
| 2026-04-08 12:00 |
11:53:40.49 |
+03:52:34.7 |
HIP 58061 |
15.43 |
| 2026-04-09 00:00 |
11:53:30.30 |
+03:53:41.1 |
HIP 58061 |
16.90 |
| 2026-04-09 12:00 |
11:53:20.16 |
+03:54:47.0 |
HIP 58061 |
18.66 |
| 2026-04-10 00:00 |
11:53:10.06 |
+03:55:52.6 |
HIP 58061 |
20.64 |
| 2026-04-10 12:00 |
11:53:00.01 |
+03:56:57.7 |
HIP 58061 |
22.76 |
| 2026-04-11 00:00 |
11:52:50.01 |
+03:58:02.4 |
HIP 58061 |
24.99 |
| 2026-04-11 12:00 |
11:52:40.06 |
+03:59:06.7 |
HIP 58061 |
27.30 |
| 2026-04-12 00:00 |
11:52:30.17 |
+04:00:10.5 |
HIP 58061 |
29.66 |
| 2026-04-12 12:00 |
11:52:20.32 |
+04:01:13.9 |
HIP 58061 |
32.06 |
| 2026-04-13 00:00 |
11:52:10.53 |
+04:02:16.8 |
HIP 57708 |
31.18 |
| 2026-04-13 12:00 |
11:52:00.80 |
+04:03:19.2 |
HIP 57708 |
28.74 |
| 2026-04-14 00:00 |
11:51:51.12 |
+04:04:21.2 |
HIP 57708 |
26.36 |
| 2026-04-14 12:00 |
11:51:41.50 |
+04:05:22.6 |
HIP 57708 |
24.04 |
| 2026-04-15 00:00 |
11:51:31.94 |
+04:06:23.6 |
HIP 57708 |
21.80 |
| 2026-04-15 12:00 |
11:51:22.44 |
+04:07:24.1 |
HIP 57708 |
19.66 |
| 2026-04-16 00:00 |
11:51:13.01 |
+04:08:24.1 |
HIP 57708 |
17.65 |