メタデータ
| 項目 |
値 |
| Designation |
C/2014 W5 (Lemmon-PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2016-02-10T14:39:44.758080Z |
| Orbit solution date (soln_date, UTC) |
2022-06-07T21:44:07Z |
| Obs used |
76 |
| NEO |
- |
| M1 |
14.400 |
| K1 |
4.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2015-02-12.0000000 |
| e |
0.97912661 |
| q (au) |
2.398527 |
| a (au) |
114.908335 |
| i (deg) |
145.492823 |
| Ω (om, deg) |
245.338804 |
| ω (w, deg) |
281.258140 |
| M (ma, deg) |
359.709053 |
等級
散乱 + 全体線形
$$
M_a = (14.915 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
14.915 |
| n |
2.000 |
| gf |
0.978 |
| gb |
-0.500 |
| k |
0.800 |
| δ90 |
9.998 |
| 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 |
13:00:22.02 |
+28:32:06.2 |
HIP 63561 |
16.64 |
| 2026-05-12 12:00 |
13:00:17.23 |
+28:32:05.7 |
HIP 63561 |
17.63 |
| 2026-05-13 00:00 |
13:00:12.47 |
+28:32:04.8 |
HIP 63561 |
18.62 |
| 2026-05-13 12:00 |
13:00:07.75 |
+28:32:03.4 |
HIP 63407 |
19.27 |
| 2026-05-14 00:00 |
13:00:03.05 |
+28:32:01.7 |
HIP 63407 |
18.86 |
| 2026-05-14 12:00 |
12:59:58.38 |
+28:31:59.4 |
HIP 63407 |
18.50 |
| 2026-05-15 00:00 |
12:59:53.75 |
+28:31:56.8 |
HIP 63407 |
18.18 |
| 2026-05-15 12:00 |
12:59:49.14 |
+28:31:53.8 |
HIP 63407 |
17.90 |
| 2026-05-16 00:00 |
12:59:44.57 |
+28:31:50.3 |
HIP 63407 |
17.68 |
| 2026-05-16 12:00 |
12:59:40.02 |
+28:31:46.4 |
HIP 63407 |
17.50 |
| 2026-05-17 00:00 |
12:59:35.51 |
+28:31:42.0 |
HIP 63407 |
17.37 |
| 2026-05-17 12:00 |
12:59:31.03 |
+28:31:37.3 |
HIP 63407 |
17.29 |
| 2026-05-18 00:00 |
12:59:26.59 |
+28:31:32.1 |
HIP 63320 |
16.94 |
| 2026-05-18 12:00 |
12:59:22.17 |
+28:31:26.5 |
HIP 63320 |
16.22 |
| 2026-05-19 00:00 |
12:59:17.79 |
+28:31:20.5 |
HIP 63320 |
15.53 |
| 2026-05-19 12:00 |
12:59:13.45 |
+28:31:14.1 |
HIP 63320 |
14.87 |
| 2026-05-20 00:00 |
12:59:09.13 |
+28:31:07.2 |
HIP 63320 |
14.24 |
| 2026-05-20 12:00 |
12:59:04.85 |
+28:31:00.0 |
HIP 63320 |
13.65 |
| 2026-05-21 00:00 |
12:59:00.61 |
+28:30:52.3 |
HIP 63320 |
13.09 |
| 2026-05-21 12:00 |
12:58:56.40 |
+28:30:44.2 |
HIP 63320 |
12.58 |
| 2026-05-22 00:00 |
12:58:52.22 |
+28:30:35.8 |
HIP 63320 |
12.11 |
| 2026-05-22 12:00 |
12:58:48.08 |
+28:30:26.9 |
HIP 63320 |
11.70 |
| 2026-05-23 00:00 |
12:58:43.97 |
+28:30:17.6 |
HIP 63320 |
11.34 |
| 2026-05-23 12:00 |
12:58:39.90 |
+28:30:07.9 |
HIP 63320 |
11.04 |
| 2026-05-24 00:00 |
12:58:35.87 |
+28:29:57.8 |
HIP 63320 |
10.80 |
| 2026-05-24 12:00 |
12:58:31.87 |
+28:29:47.4 |
HIP 63320 |
10.63 |
| 2026-05-25 00:00 |
12:58:27.90 |
+28:29:36.5 |
HIP 63320 |
10.52 |
| 2026-05-25 12:00 |
12:58:23.98 |
+28:29:25.2 |
HIP 63320 |
10.48 |
| 2026-05-26 00:00 |
12:58:20.09 |
+28:29:13.6 |
HIP 63252 |
9.71 |
| 2026-05-26 12:00 |
12:58:16.23 |
+28:29:01.5 |
HIP 63252 |
8.85 |
| 2026-05-27 00:00 |
12:58:12.42 |
+28:28:49.1 |
HIP 63252 |
7.99 |
| 2026-05-27 12:00 |
12:58:08.64 |
+28:28:36.3 |
HIP 63252 |
7.14 |
| 2026-05-28 00:00 |
12:58:04.89 |
+28:28:23.1 |
HIP 63252 |
6.30 |
| 2026-05-28 12:00 |
12:58:01.19 |
+28:28:09.5 |
HIP 63252 |
5.46 |
| 2026-05-29 00:00 |
12:57:57.52 |
+28:27:55.6 |
HIP 63252 |
4.64 |
| 2026-05-29 12:00 |
12:57:53.89 |
+28:27:41.3 |
HIP 63252 |
3.82 |
| 2026-05-30 00:00 |
12:57:50.30 |
+28:27:26.6 |
HIP 63252 |
3.01 |
| 2026-05-30 12:00 |
12:57:46.74 |
+28:27:11.5 |
HIP 63252 |
2.23 |
| 2026-05-31 00:00 |
12:57:43.23 |
+28:26:56.1 |
HIP 63252 |
1.48 |
| 2026-05-31 12:00 |
12:57:39.75 |
+28:26:40.3 |
HIP 63252 |
0.86 |
| 2026-06-01 00:00 |
12:57:36.31 |
+28:26:24.1 |
HIP 63252 |
0.77 |
| 2026-06-01 12:00 |
12:57:32.91 |
+28:26:07.6 |
HIP 63252 |
1.30 |
| 2026-06-02 00:00 |
12:57:29.55 |
+28:25:50.7 |
HIP 63252 |
2.01 |