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 |
0.998 |
| gb |
-0.500 |
| k |
0.800 |
| δ90 |
9.999 |
| 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) |
| 2026-09-20 00:00 |
13:01:06.94 |
+26:18:48.8 |
HIP 63667 |
25.00 |
| 2026-09-20 12:00 |
13:01:11.18 |
+26:18:19.6 |
HIP 63667 |
24.19 |
| 2026-09-21 00:00 |
13:01:15.43 |
+26:17:50.6 |
HIP 63667 |
23.40 |
| 2026-09-21 12:00 |
13:01:19.70 |
+26:17:21.8 |
HIP 63667 |
22.63 |
| 2026-09-22 00:00 |
13:01:23.97 |
+26:16:53.3 |
HIP 63667 |
21.88 |
| 2026-09-22 12:00 |
13:01:28.26 |
+26:16:25.1 |
HIP 63667 |
21.15 |
| 2026-09-23 00:00 |
13:01:32.55 |
+26:15:57.1 |
HIP 63667 |
20.45 |
| 2026-09-23 12:00 |
13:01:36.86 |
+26:15:29.3 |
HIP 63667 |
19.78 |
| 2026-09-24 00:00 |
13:01:41.18 |
+26:15:01.8 |
HIP 63667 |
19.14 |
| 2026-09-24 12:00 |
13:01:45.51 |
+26:14:34.6 |
HIP 63667 |
18.53 |
| 2026-09-25 00:00 |
13:01:49.84 |
+26:14:07.6 |
HIP 63667 |
17.97 |
| 2026-09-25 12:00 |
13:01:54.19 |
+26:13:40.8 |
HIP 63667 |
17.44 |
| 2026-09-26 00:00 |
13:01:58.54 |
+26:13:14.4 |
HIP 63667 |
16.97 |
| 2026-09-26 12:00 |
13:02:02.91 |
+26:12:48.2 |
HIP 63667 |
16.54 |
| 2026-09-27 00:00 |
13:02:07.28 |
+26:12:22.3 |
HIP 63667 |
16.17 |
| 2026-09-27 12:00 |
13:02:11.66 |
+26:11:56.6 |
HIP 63667 |
15.86 |
| 2026-09-28 00:00 |
13:02:16.05 |
+26:11:31.2 |
HIP 63667 |
15.61 |
| 2026-09-28 12:00 |
13:02:20.45 |
+26:11:06.1 |
HIP 63667 |
15.43 |
| 2026-09-29 00:00 |
13:02:24.85 |
+26:10:41.2 |
HIP 63667 |
15.32 |
| 2026-09-29 12:00 |
13:02:29.26 |
+26:10:16.6 |
HIP 63667 |
15.27 |
| 2026-09-30 00:00 |
13:02:33.68 |
+26:09:52.3 |
HIP 63667 |
15.30 |
| 2026-09-30 12:00 |
13:02:38.10 |
+26:09:28.3 |
HIP 63667 |
15.39 |
| 2026-10-01 00:00 |
13:02:42.54 |
+26:09:04.6 |
HIP 63667 |
15.56 |
| 2026-10-01 12:00 |
13:02:46.97 |
+26:08:41.1 |
HIP 63667 |
15.78 |
| 2026-10-02 00:00 |
13:02:51.42 |
+26:08:18.0 |
HIP 63667 |
16.08 |
| 2026-10-02 12:00 |
13:02:55.86 |
+26:07:55.1 |
HIP 63667 |
16.43 |
| 2026-10-03 00:00 |
13:03:00.32 |
+26:07:32.5 |
HIP 63667 |
16.84 |
| 2026-10-03 12:00 |
13:03:04.78 |
+26:07:10.2 |
HIP 63667 |
17.29 |
| 2026-10-04 00:00 |
13:03:09.24 |
+26:06:48.2 |
HIP 63667 |
17.80 |
| 2026-10-04 12:00 |
13:03:13.71 |
+26:06:26.5 |
HIP 63667 |
18.35 |
| 2026-10-05 00:00 |
13:03:18.18 |
+26:06:05.1 |
HIP 63716 |
18.28 |
| 2026-10-05 12:00 |
13:03:22.65 |
+26:05:43.9 |
HIP 63716 |
17.85 |
| 2026-10-06 00:00 |
13:03:27.13 |
+26:05:23.1 |
HIP 63716 |
17.48 |
| 2026-10-06 12:00 |
13:03:31.61 |
+26:05:02.6 |
HIP 63716 |
17.17 |
| 2026-10-07 00:00 |
13:03:36.09 |
+26:04:42.4 |
HIP 63716 |
16.93 |
| 2026-10-07 12:00 |
13:03:40.58 |
+26:04:22.5 |
HIP 63716 |
16.76 |
| 2026-10-08 00:00 |
13:03:45.07 |
+26:04:02.9 |
HIP 63721 |
16.64 |
| 2026-10-08 12:00 |
13:03:49.55 |
+26:03:43.7 |
HIP 63721 |
16.58 |
| 2026-10-09 00:00 |
13:03:54.05 |
+26:03:24.7 |
HIP 63721 |
16.60 |
| 2026-10-09 12:00 |
13:03:58.54 |
+26:03:06.1 |
HIP 63721 |
16.68 |
| 2026-10-10 00:00 |
13:04:03.03 |
+26:02:47.7 |
HIP 63721 |
16.84 |
| 2026-10-10 12:00 |
13:04:07.52 |
+26:02:29.7 |
HIP 63721 |
17.07 |
| 2026-10-11 00:00 |
13:04:12.01 |
+26:02:12.1 |
HIP 63721 |
17.37 |