457P/Lemmon-PANSTARRS
メタデータ
| 項目 |
値 |
| Designation |
457P/Lemmon-PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2020-05-04T06:45:39.692160Z |
| Orbit solution date (soln_date, UTC) |
2025-01-02T20:13:03Z |
| Obs used |
136 |
| NEO |
- |
| M1 |
6.800 |
| K1 |
36.250 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2016-07-03T13:38:06.950400Z |
| Discovery magnitude (MPC) |
23.20 T |
| Discovery observatory (MPC) |
T09 · Subaru Telescope, Maunakea |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2020-04-13.0000000 |
| e |
0.11977371 |
| q (au) |
2.329381 |
| a (au) |
2.646344 |
| i (deg) |
5.222268 |
| Ω (om, deg) |
176.012536 |
| ω (w, deg) |
104.953942 |
| M (ma, deg) |
355.127619 |
等級
散乱 + 全体線形
$$
M_a = (20.000 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
20.000 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.721 |
| k |
0.978 |
| 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) |
| 2026-02-03 00:00 |
02:07:49.36 |
+08:18:44.7 |
HIP 9920 |
21.29 |
| 2026-02-03 12:00 |
02:08:18.15 |
+08:21:39.2 |
HIP 9920 |
25.71 |
| 2026-02-04 00:00 |
02:08:47.13 |
+08:24:34.4 |
HIP 9965 |
27.30 |
| 2026-02-04 12:00 |
02:09:16.29 |
+08:27:30.3 |
HIP 10171 |
23.63 |
| 2026-02-05 00:00 |
02:09:45.64 |
+08:30:26.7 |
HIP 10171 |
17.82 |
| 2026-02-05 12:00 |
02:10:15.17 |
+08:33:23.8 |
HIP 10171 |
14.09 |
| 2026-02-06 00:00 |
02:10:44.88 |
+08:36:21.4 |
HIP 10212 |
9.22 |
| 2026-02-06 12:00 |
02:11:14.78 |
+08:39:19.6 |
HIP 10212 |
5.36 |
| 2026-02-07 00:00 |
02:11:44.85 |
+08:42:18.3 |
HIP 10212 |
9.99 |
| 2026-02-07 12:00 |
02:12:15.10 |
+08:45:17.6 |
HIP 10324 |
12.39 |
| 2026-02-08 00:00 |
02:12:45.52 |
+08:48:17.5 |
HIP 10324 |
4.37 |
| 2026-02-08 12:00 |
02:13:16.12 |
+08:51:17.9 |
HIP 10324 |
4.01 |
| 2026-02-09 00:00 |
02:13:46.90 |
+08:54:18.8 |
HIP 10324 |
12.10 |
| 2026-02-09 12:00 |
02:14:17.85 |
+08:57:20.1 |
HIP 10414 |
11.43 |
| 2026-02-10 00:00 |
02:14:48.97 |
+09:00:22.0 |
HIP 10414 |
12.52 |
| 2026-02-10 12:00 |
02:15:20.26 |
+09:03:24.4 |
HIP 10414 |
17.90 |
| 2026-02-11 00:00 |
02:15:51.72 |
+09:06:27.2 |
HIP 10414 |
24.97 |
| 2026-02-11 12:00 |
02:16:23.35 |
+09:09:30.5 |
HIP 10737 |
28.29 |
| 2026-02-12 00:00 |
02:16:55.15 |
+09:12:34.2 |
HIP 10737 |
22.49 |
| 2026-02-12 12:00 |
02:17:27.11 |
+09:15:38.3 |
HIP 10737 |
18.78 |
| 2026-02-13 00:00 |
02:17:59.24 |
+09:18:42.9 |
HIP 10737 |
18.51 |
| 2026-02-13 12:00 |
02:18:31.53 |
+09:21:47.8 |
HIP 10737 |
21.87 |
| 2026-02-14 00:00 |
02:19:03.98 |
+09:24:53.2 |
HIP 10764 |
27.26 |
| 2026-02-14 12:00 |
02:19:36.60 |
+09:27:58.9 |
HIP 10764 |
28.01 |
| 2026-02-15 00:00 |
02:20:09.37 |
+09:31:05.0 |
HIP 10972 |
21.93 |
| 2026-02-15 12:00 |
02:20:42.31 |
+09:34:11.4 |
HIP 10972 |
13.76 |
| 2026-02-16 00:00 |
02:21:15.40 |
+09:37:18.2 |
HIP 10972 |
6.97 |
| 2026-02-16 12:00 |
02:21:48.65 |
+09:40:25.3 |
HIP 10972 |
7.79 |
| 2026-02-17 00:00 |
02:22:22.05 |
+09:43:32.8 |
HIP 10972 |
15.09 |
| 2026-02-17 12:00 |
02:22:55.61 |
+09:46:40.5 |
HIP 10972 |
23.48 |
| 2026-02-18 00:00 |
02:23:29.32 |
+09:49:48.6 |
HIP 11228 |
16.62 |
| 2026-02-18 12:00 |
02:24:03.19 |
+09:52:56.9 |
HIP 11228 |
12.17 |
| 2026-02-19 00:00 |
02:24:37.20 |
+09:56:05.5 |
HIP 11228 |
13.39 |
| 2026-02-19 12:00 |
02:25:11.36 |
+09:59:14.3 |
HIP 11228 |
19.28 |
| 2026-02-20 00:00 |
02:25:45.68 |
+10:02:23.4 |
HIP 11427 |
25.91 |
| 2026-02-20 12:00 |
02:26:20.13 |
+10:05:32.7 |
HIP 11427 |
16.86 |
| 2026-02-21 00:00 |
02:26:54.74 |
+10:08:42.3 |
HIP 11427 |
7.79 |
| 2026-02-21 12:00 |
02:27:29.49 |
+10:11:52.0 |
HIP 11427 |
1.46 |
| 2026-02-22 00:00 |
02:28:04.38 |
+10:15:02.0 |
HIP 11427 |
10.51 |
| 2026-02-22 12:00 |
02:28:39.41 |
+10:18:12.1 |
HIP 11506 |
16.43 |
| 2026-02-23 00:00 |
02:29:14.59 |
+10:21:22.3 |
HIP 11506 |
18.13 |
| 2026-02-23 12:00 |
02:29:49.90 |
+10:24:32.8 |
HIP 11506 |
23.63 |
| 2026-02-24 00:00 |
02:30:25.35 |
+10:27:43.4 |
HIP 11506 |
31.00 |