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) |
| 2026-07-29 00:00 |
12:55:42.65 |
+27:25:05.6 |
HIP 63048 |
22.24 |
| 2026-07-29 12:00 |
12:55:44.10 |
+27:24:24.9 |
HIP 63048 |
22.99 |
| 2026-07-30 00:00 |
12:55:45.58 |
+27:23:44.2 |
HIP 63048 |
23.74 |
| 2026-07-30 12:00 |
12:55:47.11 |
+27:23:03.5 |
HIP 63048 |
24.50 |
| 2026-07-31 00:00 |
12:55:48.67 |
+27:22:22.7 |
HIP 63048 |
25.25 |
| 2026-07-31 12:00 |
12:55:50.27 |
+27:21:41.9 |
HIP 63048 |
26.02 |
| 2026-08-01 00:00 |
12:55:51.91 |
+27:21:01.0 |
HIP 63048 |
26.78 |
| 2026-08-01 12:00 |
12:55:53.58 |
+27:20:20.2 |
HIP 63048 |
27.55 |
| 2026-08-02 00:00 |
12:55:55.29 |
+27:19:39.3 |
HIP 63048 |
28.32 |
| 2026-08-02 12:00 |
12:55:57.04 |
+27:18:58.4 |
HIP 63048 |
29.10 |
| 2026-08-03 00:00 |
12:55:58.82 |
+27:18:17.5 |
HIP 63048 |
29.88 |
| 2026-08-03 12:00 |
12:56:00.64 |
+27:17:36.6 |
HIP 63048 |
30.67 |
| 2026-08-04 00:00 |
12:56:02.50 |
+27:16:55.7 |
HIP 63048 |
31.45 |
| 2026-08-04 12:00 |
12:56:04.39 |
+27:16:14.7 |
HIP 63048 |
32.24 |
| 2026-08-05 00:00 |
12:56:06.32 |
+27:15:33.8 |
HIP 63048 |
33.04 |
| 2026-08-05 12:00 |
12:56:08.28 |
+27:14:52.8 |
HIP 63048 |
33.84 |
| 2026-08-06 00:00 |
12:56:10.28 |
+27:14:11.9 |
HIP 63048 |
34.64 |
| 2026-08-06 12:00 |
12:56:12.31 |
+27:13:30.9 |
HIP 63334 |
34.13 |
| 2026-08-07 00:00 |
12:56:14.38 |
+27:12:50.0 |
HIP 63334 |
33.55 |
| 2026-08-07 12:00 |
12:56:16.48 |
+27:12:09.1 |
HIP 63334 |
32.99 |
| 2026-08-08 00:00 |
12:56:18.62 |
+27:11:28.2 |
HIP 63334 |
32.42 |
| 2026-08-08 12:00 |
12:56:20.79 |
+27:10:47.3 |
HIP 63334 |
31.86 |
| 2026-08-09 00:00 |
12:56:23.00 |
+27:10:06.4 |
HIP 63334 |
31.30 |
| 2026-08-09 12:00 |
12:56:25.24 |
+27:09:25.6 |
HIP 63334 |
30.75 |
| 2026-08-10 00:00 |
12:56:27.52 |
+27:08:44.7 |
HIP 63334 |
30.20 |
| 2026-08-10 12:00 |
12:56:29.83 |
+27:08:03.9 |
HIP 63334 |
29.66 |
| 2026-08-11 00:00 |
12:56:32.17 |
+27:07:23.2 |
HIP 63334 |
29.13 |
| 2026-08-11 12:00 |
12:56:34.55 |
+27:06:42.4 |
HIP 63334 |
28.60 |
| 2026-08-12 00:00 |
12:56:36.96 |
+27:06:01.7 |
HIP 63334 |
28.09 |
| 2026-08-12 12:00 |
12:56:39.40 |
+27:05:21.1 |
HIP 63334 |
27.58 |
| 2026-08-13 00:00 |
12:56:41.87 |
+27:04:40.4 |
HIP 63334 |
27.09 |
| 2026-08-13 12:00 |
12:56:44.38 |
+27:03:59.9 |
HIP 63334 |
26.61 |
| 2026-08-14 00:00 |
12:56:46.92 |
+27:03:19.4 |
HIP 63334 |
26.14 |
| 2026-08-14 12:00 |
12:56:49.49 |
+27:02:38.9 |
HIP 63334 |
25.68 |
| 2026-08-15 00:00 |
12:56:52.10 |
+27:01:58.5 |
HIP 63334 |
25.24 |
| 2026-08-15 12:00 |
12:56:54.73 |
+27:01:18.1 |
HIP 63334 |
24.82 |
| 2026-08-16 00:00 |
12:56:57.40 |
+27:00:37.9 |
HIP 63334 |
24.42 |
| 2026-08-16 12:00 |
12:57:00.10 |
+26:59:57.6 |
HIP 63334 |
24.03 |
| 2026-08-17 00:00 |
12:57:02.82 |
+26:59:17.5 |
HIP 63334 |
23.67 |
| 2026-08-17 12:00 |
12:57:05.58 |
+26:58:37.4 |
HIP 63334 |
23.33 |
| 2026-08-18 00:00 |
12:57:08.37 |
+26:57:57.4 |
HIP 63334 |
23.01 |
| 2026-08-18 12:00 |
12:57:11.19 |
+26:57:17.5 |
HIP 63334 |
22.72 |
| 2026-08-19 00:00 |
12:57:14.04 |
+26:56:37.6 |
HIP 63334 |
22.46 |