メタデータ
| 項目 |
値 |
| Designation |
159P/LONEOS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2018-05-23T04:51:35.352000Z |
| Orbit solution date (soln_date, UTC) |
2024-02-25T22:13:01Z |
| Obs used |
880 |
| NEO |
- |
| M1 |
12.900 |
| 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) |
2015-04-25.0000000 |
| e |
0.38206863 |
| q (au) |
3.621139 |
| a (au) |
5.860099 |
| i (deg) |
23.462312 |
| Ω (om, deg) |
55.063749 |
| ω (w, deg) |
4.872824 |
| M (ma, deg) |
281.892773 |
等級
散乱 + 全体線形
$$
M_a = (11.771 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
11.771 |
| n |
2.000 |
| gf |
0.817 |
| gb |
-0.500 |
| k |
1.000 |
| δ90 |
1.636 |
| 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
ファインディングチャート
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
16:37:14.37 |
-29:06:57.1 |
HIP 81527 |
27.73 |
| 2026-05-12 12:00 |
16:37:01.39 |
-29:07:11.0 |
HIP 81527 |
30.37 |
| 2026-05-13 00:00 |
16:36:48.34 |
-29:07:24.5 |
HIP 81226 |
30.45 |
| 2026-05-13 12:00 |
16:36:35.23 |
-29:07:37.6 |
HIP 81226 |
28.66 |
| 2026-05-14 00:00 |
16:36:22.06 |
-29:07:50.3 |
HIP 81140 |
27.03 |
| 2026-05-14 12:00 |
16:36:08.82 |
-29:08:02.6 |
HIP 81140 |
24.13 |
| 2026-05-15 00:00 |
16:35:55.53 |
-29:08:14.5 |
HIP 81140 |
21.22 |
| 2026-05-15 12:00 |
16:35:42.17 |
-29:08:25.9 |
HIP 81140 |
18.30 |
| 2026-05-16 00:00 |
16:35:28.76 |
-29:08:37.0 |
HIP 81140 |
15.38 |
| 2026-05-16 12:00 |
16:35:15.30 |
-29:08:47.6 |
HIP 81140 |
12.44 |
| 2026-05-17 00:00 |
16:35:01.78 |
-29:08:57.9 |
HIP 81140 |
9.49 |
| 2026-05-17 12:00 |
16:34:48.21 |
-29:09:07.7 |
HIP 81140 |
6.55 |
| 2026-05-18 00:00 |
16:34:34.59 |
-29:09:17.1 |
HIP 81140 |
3.64 |
| 2026-05-18 12:00 |
16:34:20.92 |
-29:09:26.1 |
HIP 81140 |
1.17 |
| 2026-05-19 00:00 |
16:34:07.21 |
-29:09:34.7 |
HIP 81140 |
2.71 |
| 2026-05-19 12:00 |
16:33:53.45 |
-29:09:42.9 |
HIP 81140 |
5.61 |
| 2026-05-20 00:00 |
16:33:39.65 |
-29:09:50.6 |
HIP 81140 |
8.59 |
| 2026-05-20 12:00 |
16:33:25.81 |
-29:09:58.0 |
HIP 81140 |
11.60 |
| 2026-05-21 00:00 |
16:33:11.93 |
-29:10:05.0 |
HIP 81140 |
14.62 |
| 2026-05-21 12:00 |
16:32:58.02 |
-29:10:11.6 |
HIP 81140 |
17.65 |
| 2026-05-22 00:00 |
16:32:44.07 |
-29:10:17.7 |
HIP 81140 |
20.69 |
| 2026-05-22 12:00 |
16:32:30.09 |
-29:10:23.5 |
HIP 81140 |
23.75 |
| 2026-05-23 00:00 |
16:32:16.08 |
-29:10:28.9 |
HIP 81140 |
26.80 |
| 2026-05-23 12:00 |
16:32:02.04 |
-29:10:33.8 |
HIP 80859 |
25.37 |
| 2026-05-24 00:00 |
16:31:47.98 |
-29:10:38.4 |
HIP 80859 |
23.30 |
| 2026-05-24 12:00 |
16:31:33.88 |
-29:10:42.6 |
HIP 80859 |
21.49 |
| 2026-05-25 00:00 |
16:31:19.77 |
-29:10:46.4 |
HIP 80859 |
19.98 |
| 2026-05-25 12:00 |
16:31:05.63 |
-29:10:49.8 |
HIP 80859 |
18.87 |
| 2026-05-26 00:00 |
16:30:51.47 |
-29:10:52.8 |
HIP 80859 |
18.22 |
| 2026-05-26 12:00 |
16:30:37.29 |
-29:10:55.4 |
HIP 80859 |
18.09 |
| 2026-05-27 00:00 |
16:30:23.10 |
-29:10:57.6 |
HIP 80859 |
18.49 |
| 2026-05-27 12:00 |
16:30:08.89 |
-29:10:59.5 |
HIP 80735 |
17.29 |
| 2026-05-28 00:00 |
16:29:54.67 |
-29:11:00.9 |
HIP 80735 |
14.62 |
| 2026-05-28 12:00 |
16:29:40.44 |
-29:11:02.0 |
HIP 80735 |
12.17 |
| 2026-05-29 00:00 |
16:29:26.20 |
-29:11:02.7 |
HIP 80735 |
10.07 |
| 2026-05-29 12:00 |
16:29:11.95 |
-29:11:03.1 |
HIP 80735 |
8.60 |
| 2026-05-30 00:00 |
16:28:57.70 |
-29:11:03.0 |
HIP 80735 |
8.11 |
| 2026-05-30 12:00 |
16:28:43.44 |
-29:11:02.6 |
HIP 80735 |
8.77 |
| 2026-05-31 00:00 |
16:28:29.18 |
-29:11:01.8 |
HIP 80735 |
10.36 |
| 2026-05-31 12:00 |
16:28:14.92 |
-29:11:00.7 |
HIP 80607 |
11.70 |
| 2026-06-01 00:00 |
16:28:00.66 |
-29:10:59.2 |
HIP 80607 |
9.24 |
| 2026-06-01 12:00 |
16:27:46.40 |
-29:10:57.3 |
HIP 80607 |
7.31 |
| 2026-06-02 00:00 |
16:27:32.14 |
-29:10:55.1 |
HIP 80607 |
6.40 |