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) |
| 2026-03-26 00:00 |
13:09:07.29 |
+28:00:23.2 |
HIP 64097 |
18.36 |
| 2026-03-26 12:00 |
13:09:01.55 |
+28:01:02.6 |
HIP 64097 |
17.00 |
| 2026-03-27 00:00 |
13:08:55.79 |
+28:01:41.6 |
HIP 64097 |
15.65 |
| 2026-03-27 12:00 |
13:08:50.03 |
+28:02:20.3 |
HIP 64097 |
14.32 |
| 2026-03-28 00:00 |
13:08:44.25 |
+28:02:58.5 |
HIP 64097 |
13.01 |
| 2026-03-28 12:00 |
13:08:38.47 |
+28:03:36.5 |
HIP 64097 |
11.74 |
| 2026-03-29 00:00 |
13:08:32.68 |
+28:04:14.0 |
HIP 64097 |
10.51 |
| 2026-03-29 12:00 |
13:08:26.88 |
+28:04:51.2 |
HIP 64097 |
9.33 |
| 2026-03-30 00:00 |
13:08:21.07 |
+28:05:28.0 |
HIP 64097 |
8.25 |
| 2026-03-30 12:00 |
13:08:15.25 |
+28:06:04.5 |
HIP 64097 |
7.28 |
| 2026-03-31 00:00 |
13:08:09.43 |
+28:06:40.5 |
HIP 64097 |
6.48 |
| 2026-03-31 12:00 |
13:08:03.60 |
+28:07:16.2 |
HIP 64097 |
5.93 |
| 2026-04-01 00:00 |
13:07:57.76 |
+28:07:51.5 |
HIP 64097 |
5.70 |
| 2026-04-01 12:00 |
13:07:51.92 |
+28:08:26.4 |
HIP 64097 |
5.81 |
| 2026-04-02 00:00 |
13:07:46.08 |
+28:09:01.0 |
HIP 64097 |
6.26 |
| 2026-04-02 12:00 |
13:07:40.23 |
+28:09:35.1 |
HIP 64097 |
6.97 |
| 2026-04-03 00:00 |
13:07:34.37 |
+28:10:08.9 |
HIP 64097 |
7.87 |
| 2026-04-03 12:00 |
13:07:28.52 |
+28:10:42.2 |
HIP 63993 |
8.67 |
| 2026-04-04 00:00 |
13:07:22.65 |
+28:11:15.2 |
HIP 63993 |
7.31 |
| 2026-04-04 12:00 |
13:07:16.79 |
+28:11:47.8 |
HIP 63993 |
5.95 |
| 2026-04-05 00:00 |
13:07:10.92 |
+28:12:20.0 |
HIP 63993 |
4.63 |
| 2026-04-05 12:00 |
13:07:05.05 |
+28:12:51.7 |
HIP 63993 |
3.36 |
| 2026-04-06 00:00 |
13:06:59.18 |
+28:13:23.1 |
HIP 63993 |
2.26 |
| 2026-04-06 12:00 |
13:06:53.31 |
+28:13:54.1 |
HIP 63993 |
1.66 |
| 2026-04-07 00:00 |
13:06:47.44 |
+28:14:24.7 |
HIP 63993 |
2.07 |
| 2026-04-07 12:00 |
13:06:41.57 |
+28:14:54.8 |
HIP 63993 |
3.10 |
| 2026-04-08 00:00 |
13:06:35.69 |
+28:15:24.6 |
HIP 63993 |
4.33 |
| 2026-04-08 12:00 |
13:06:29.82 |
+28:15:53.9 |
HIP 63993 |
5.63 |
| 2026-04-09 00:00 |
13:06:23.95 |
+28:16:22.8 |
HIP 63993 |
6.96 |
| 2026-04-09 12:00 |
13:06:18.08 |
+28:16:51.3 |
HIP 63993 |
8.30 |
| 2026-04-10 00:00 |
13:06:12.22 |
+28:17:19.4 |
HIP 63993 |
9.65 |
| 2026-04-10 12:00 |
13:06:06.35 |
+28:17:47.1 |
HIP 63993 |
10.99 |
| 2026-04-11 00:00 |
13:06:00.49 |
+28:18:14.4 |
HIP 63993 |
12.34 |
| 2026-04-11 12:00 |
13:05:54.64 |
+28:18:41.2 |
HIP 63993 |
13.69 |
| 2026-04-12 00:00 |
13:05:48.78 |
+28:19:07.6 |
HIP 63993 |
15.04 |
| 2026-04-12 12:00 |
13:05:42.94 |
+28:19:33.6 |
HIP 63993 |
16.39 |
| 2026-04-13 00:00 |
13:05:37.09 |
+28:19:59.1 |
HIP 63993 |
17.73 |
| 2026-04-13 12:00 |
13:05:31.25 |
+28:20:24.3 |
HIP 63993 |
19.07 |
| 2026-04-14 00:00 |
13:05:25.42 |
+28:20:49.0 |
HIP 63993 |
20.41 |
| 2026-04-14 12:00 |
13:05:19.60 |
+28:21:13.2 |
HIP 63772 |
20.06 |
| 2026-04-15 00:00 |
13:05:13.78 |
+28:21:37.1 |
HIP 63772 |
19.53 |
| 2026-04-15 12:00 |
13:05:07.96 |
+28:22:00.5 |
HIP 63772 |
19.07 |
| 2026-04-16 00:00 |
13:05:02.16 |
+28:22:23.4 |
HIP 63772 |
18.69 |