メタデータ
| 項目 |
値 |
| Designation |
481P/Lemmon-PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2013-01-20T09:40:11.303040Z |
| Orbit solution date (soln_date, UTC) |
2025-01-02T20:13:07Z |
| Obs used |
58 |
| NEO |
- |
| M1 |
14.500 |
| K1 |
8.750 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-02-12T23:21:45.216000Z |
| Discovery magnitude (MPC) |
20.20 G |
| Discovery observatory (MPC) |
J04 · ESA Optical Ground Station, Tenerife |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2018-02-02.0000000 |
| e |
0.33653656 |
| q (au) |
3.174489 |
| a (au) |
4.784723 |
| i (deg) |
6.121394 |
| Ω (om, deg) |
94.508201 |
| ω (w, deg) |
352.744493 |
| M (ma, deg) |
173.143194 |
等級
散乱 + 全体線形
$$
M_a = (10.456 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
10.456 |
| n |
6.000 |
| gf |
0.999 |
| gb |
-0.536 |
| k |
1.000 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
14:42:36.68 |
-10:10:00.9 |
HIP 71834 |
25.40 |
| 2026-06-01 12:00 |
14:42:23.94 |
-10:09:29.2 |
HIP 71834 |
23.39 |
| 2026-06-02 00:00 |
14:42:11.33 |
-10:08:58.3 |
HIP 71834 |
21.69 |
| 2026-06-02 12:00 |
14:41:58.84 |
-10:08:28.1 |
HIP 71834 |
20.36 |
| 2026-06-03 00:00 |
14:41:46.47 |
-10:07:58.7 |
HIP 71834 |
19.45 |
| 2026-06-03 12:00 |
14:41:34.24 |
-10:07:30.0 |
HIP 71834 |
19.01 |
| 2026-06-04 00:00 |
14:41:22.13 |
-10:07:02.2 |
HIP 71834 |
19.07 |
| 2026-06-04 12:00 |
14:41:10.15 |
-10:06:35.1 |
HIP 71834 |
19.59 |
| 2026-06-05 00:00 |
14:40:58.31 |
-10:06:08.8 |
HIP 71685 |
20.33 |
| 2026-06-05 12:00 |
14:40:46.59 |
-10:05:43.3 |
HIP 71685 |
17.59 |
| 2026-06-06 00:00 |
14:40:35.02 |
-10:05:18.6 |
HIP 71685 |
14.95 |
| 2026-06-06 12:00 |
14:40:23.57 |
-10:04:54.6 |
HIP 71685 |
12.45 |
| 2026-06-07 00:00 |
14:40:12.27 |
-10:04:31.5 |
HIP 71685 |
10.16 |
| 2026-06-07 12:00 |
14:40:01.10 |
-10:04:09.2 |
HIP 71685 |
8.24 |
| 2026-06-08 00:00 |
14:39:50.07 |
-10:03:47.7 |
HIP 71685 |
6.94 |
| 2026-06-08 12:00 |
14:39:39.19 |
-10:03:27.1 |
HIP 71685 |
6.59 |
| 2026-06-09 00:00 |
14:39:28.44 |
-10:03:07.2 |
HIP 71685 |
7.30 |
| 2026-06-09 12:00 |
14:39:17.85 |
-10:02:48.2 |
HIP 71685 |
8.78 |
| 2026-06-10 00:00 |
14:39:07.39 |
-10:02:30.0 |
HIP 71685 |
10.68 |
| 2026-06-10 12:00 |
14:38:57.08 |
-10:02:12.7 |
HIP 71685 |
12.80 |
| 2026-06-11 00:00 |
14:38:46.92 |
-10:01:56.1 |
HIP 71685 |
15.03 |
| 2026-06-11 12:00 |
14:38:36.91 |
-10:01:40.5 |
HIP 71685 |
17.30 |
| 2026-06-12 00:00 |
14:38:27.05 |
-10:01:25.6 |
HIP 71553 |
18.05 |
| 2026-06-12 12:00 |
14:38:17.34 |
-10:01:11.7 |
HIP 71553 |
17.22 |
| 2026-06-13 00:00 |
14:38:07.78 |
-10:00:58.5 |
HIP 71553 |
16.73 |
| 2026-06-13 12:00 |
14:37:58.38 |
-10:00:46.3 |
HIP 71553 |
16.56 |
| 2026-06-14 00:00 |
14:37:49.13 |
-10:00:34.9 |
HIP 71553 |
16.73 |
| 2026-06-14 12:00 |
14:37:40.03 |
-10:00:24.3 |
HIP 71553 |
17.20 |
| 2026-06-15 00:00 |
14:37:31.10 |
-10:00:14.6 |
HIP 71553 |
17.94 |
| 2026-06-15 12:00 |
14:37:22.32 |
-10:00:05.8 |
HIP 71553 |
18.90 |
| 2026-06-16 00:00 |
14:37:13.70 |
-09:59:57.9 |
HIP 71553 |
20.04 |
| 2026-06-16 12:00 |
14:37:05.24 |
-09:59:50.8 |
HIP 71553 |
21.31 |
| 2026-06-17 00:00 |
14:36:56.94 |
-09:59:44.6 |
HIP 71553 |
22.68 |
| 2026-06-17 12:00 |
14:36:48.80 |
-09:59:39.3 |
HIP 71417 |
24.13 |
| 2026-06-18 00:00 |
14:36:40.82 |
-09:59:34.8 |
HIP 71417 |
23.51 |
| 2026-06-18 12:00 |
14:36:33.01 |
-09:59:31.2 |
HIP 71417 |
23.07 |
| 2026-06-19 00:00 |
14:36:25.36 |
-09:59:28.5 |
HIP 71417 |
22.80 |
| 2026-06-19 12:00 |
14:36:17.88 |
-09:59:26.7 |
HIP 71417 |
22.70 |
| 2026-06-20 00:00 |
14:36:10.56 |
-09:59:25.7 |
HIP 71417 |
22.76 |
| 2026-06-20 12:00 |
14:36:03.41 |
-09:59:25.7 |
HIP 71417 |
22.96 |
| 2026-06-21 00:00 |
14:35:56.42 |
-09:59:26.5 |
HIP 71417 |
23.31 |
| 2026-06-21 12:00 |
14:35:49.60 |
-09:59:28.1 |
HIP 71417 |
23.78 |
| 2026-06-22 00:00 |
14:35:42.94 |
-09:59:30.7 |
HIP 71417 |
24.35 |