201P/LONEOS
メタデータ
| 項目 |
値 |
| Designation |
201P/LONEOS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2015-01-14T08:01:42.346560Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:27:52Z |
| Obs used |
865 |
| NEO |
- |
| M1 |
13.000 |
| K1 |
15.250 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2012-05-08.0000000 |
| e |
0.61286098 |
| q (au) |
1.339984 |
| a (au) |
3.461247 |
| i (deg) |
7.036519 |
| Ω (om, deg) |
35.285668 |
| ω (w, deg) |
24.953960 |
| M (ma, deg) |
209.799179 |
等級
散乱 + 全体線形
$$
M_a = (14.450 + 5.551\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
14.450 |
| n |
5.551 |
| gf |
1.000 |
| gb |
-0.662 |
| k |
0.800 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 2014-07-08 |
2014-10-02 |
+4.5177 |
-1.113 |
| 2014-10-02 |
2015-01-13 |
-5.8786 |
+1.035 |
| 2015-01-16 |
2015-04-16 |
+15.3215 |
-2.697 |
log10 r = log10(太陽距離/AU)、Δ = 地球距離(AU)
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
18:46:06.13 |
-27:41:00.5 |
HIP 92086 |
11.08 |
| 2026-02-03 12:00 |
18:46:37.37 |
-27:40:43.6 |
HIP 92086 |
13.09 |
| 2026-02-04 00:00 |
18:47:08.55 |
-27:40:26.6 |
HIP 92257 |
17.59 |
| 2026-02-04 12:00 |
18:47:39.69 |
-27:40:09.4 |
HIP 92257 |
14.04 |
| 2026-02-05 00:00 |
18:48:10.78 |
-27:39:52.1 |
HIP 92257 |
13.42 |
| 2026-02-05 12:00 |
18:48:41.81 |
-27:39:34.7 |
HIP 92257 |
16.05 |
| 2026-02-06 00:00 |
18:49:12.80 |
-27:39:17.1 |
HIP 92257 |
20.72 |
| 2026-02-06 12:00 |
18:49:43.73 |
-27:38:59.5 |
HIP 92257 |
26.35 |
| 2026-02-07 00:00 |
18:50:14.61 |
-27:38:41.7 |
HIP 92385 |
32.29 |
| 2026-02-07 12:00 |
18:50:45.43 |
-27:38:23.7 |
HIP 92535 |
29.96 |
| 2026-02-08 00:00 |
18:51:16.19 |
-27:38:05.7 |
HIP 92535 |
28.34 |
| 2026-02-08 12:00 |
18:51:46.91 |
-27:37:47.6 |
HIP 92535 |
28.31 |
| 2026-02-09 00:00 |
18:52:17.56 |
-27:37:29.3 |
HIP 92535 |
29.88 |
| 2026-02-09 12:00 |
18:52:48.15 |
-27:37:10.9 |
HIP 92784 |
25.30 |
| 2026-02-10 00:00 |
18:53:18.69 |
-27:36:52.5 |
HIP 92784 |
19.98 |
| 2026-02-10 12:00 |
18:53:49.16 |
-27:36:33.9 |
HIP 92784 |
15.80 |
| 2026-02-11 00:00 |
18:54:19.58 |
-27:36:15.3 |
HIP 92784 |
13.84 |
| 2026-02-11 12:00 |
18:54:49.93 |
-27:35:56.5 |
HIP 92883 |
10.79 |
| 2026-02-12 00:00 |
18:55:20.21 |
-27:35:37.7 |
HIP 92883 |
5.44 |
| 2026-02-12 12:00 |
18:55:50.44 |
-27:35:18.8 |
HIP 92883 |
5.73 |
| 2026-02-13 00:00 |
18:56:20.59 |
-27:34:59.8 |
HIP 92883 |
11.22 |
| 2026-02-13 12:00 |
18:56:50.69 |
-27:34:40.8 |
HIP 92883 |
17.54 |
| 2026-02-14 00:00 |
18:57:20.71 |
-27:34:21.7 |
HIP 93196 |
22.29 |
| 2026-02-14 12:00 |
18:57:50.66 |
-27:34:02.5 |
HIP 93196 |
15.97 |
| 2026-02-15 00:00 |
18:58:20.55 |
-27:33:43.2 |
HIP 93196 |
10.08 |
| 2026-02-15 12:00 |
18:58:50.37 |
-27:33:24.0 |
HIP 93196 |
6.03 |
| 2026-02-16 00:00 |
18:59:20.11 |
-27:33:04.6 |
HIP 93196 |
7.64 |
| 2026-02-16 12:00 |
18:59:49.78 |
-27:32:45.2 |
HIP 93328 |
11.22 |
| 2026-02-17 00:00 |
19:00:19.38 |
-27:32:25.8 |
HIP 93328 |
6.94 |
| 2026-02-17 12:00 |
19:00:48.90 |
-27:32:06.3 |
HIP 93392 |
6.30 |
| 2026-02-18 00:00 |
19:01:18.34 |
-27:31:46.8 |
HIP 93392 |
1.29 |
| 2026-02-18 12:00 |
19:01:47.71 |
-27:31:27.3 |
HIP 93392 |
6.99 |
| 2026-02-19 00:00 |
19:02:17.00 |
-27:31:07.8 |
HIP 93392 |
13.44 |
| 2026-02-19 12:00 |
19:02:46.21 |
-27:30:48.2 |
HIP 93531 |
10.09 |
| 2026-02-20 00:00 |
19:03:15.34 |
-27:30:28.6 |
HIP 93531 |
9.85 |
| 2026-02-20 12:00 |
19:03:44.39 |
-27:30:09.1 |
HIP 93531 |
13.26 |
| 2026-02-21 00:00 |
19:04:13.36 |
-27:29:49.5 |
HIP 93531 |
18.36 |
| 2026-02-21 12:00 |
19:04:42.25 |
-27:29:29.9 |
HIP 93790 |
19.76 |
| 2026-02-22 00:00 |
19:05:11.05 |
-27:29:10.3 |
HIP 93790 |
14.02 |
| 2026-02-22 12:00 |
19:05:39.76 |
-27:28:50.8 |
HIP 93790 |
9.20 |
| 2026-02-23 00:00 |
19:06:08.39 |
-27:28:31.2 |
HIP 93790 |
7.35 |
| 2026-02-23 12:00 |
19:06:36.93 |
-27:28:11.7 |
HIP 93790 |
10.20 |
| 2026-02-24 00:00 |
19:07:05.39 |
-27:27:52.2 |
HIP 93864 |
12.48 |