メタデータ
| 項目 |
値 |
| Designation |
423P/Lemmon |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2021-09-24T00:20:08.096640Z |
| Orbit solution date (soln_date, UTC) |
2023-03-28T19:43:45Z |
| Obs used |
96 |
| NEO |
- |
| M1 |
13.800 |
| 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) |
2020-02-19.0000000 |
| e |
0.12005480 |
| q (au) |
5.418519 |
| a (au) |
6.157791 |
| i (deg) |
8.348898 |
| Ω (om, deg) |
33.347491 |
| ω (w, deg) |
80.712810 |
| M (ma, deg) |
322.394999 |
等級
散乱 + 全体線形
$$
M_a = (12.108 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
12.108 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.778 |
| 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
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) |
| 2026-06-01 00:00 |
15:20:19.44 |
-22:20:37.2 |
HIP 75159 |
17.23 |
| 2026-06-01 12:00 |
15:20:06.56 |
-22:20:00.7 |
HIP 75159 |
20.22 |
| 2026-06-02 00:00 |
15:19:53.75 |
-22:19:24.3 |
HIP 75159 |
23.21 |
| 2026-06-02 12:00 |
15:19:41.01 |
-22:18:47.9 |
HIP 75159 |
26.19 |
| 2026-06-03 00:00 |
15:19:28.35 |
-22:18:11.4 |
HIP 74939 |
28.36 |
| 2026-06-03 12:00 |
15:19:15.76 |
-22:17:35.1 |
HIP 74939 |
28.13 |
| 2026-06-04 00:00 |
15:19:03.26 |
-22:16:58.7 |
HIP 74939 |
28.22 |
| 2026-06-04 12:00 |
15:18:50.83 |
-22:16:22.4 |
HIP 74939 |
28.61 |
| 2026-06-05 00:00 |
15:18:38.49 |
-22:15:46.2 |
HIP 74939 |
29.28 |
| 2026-06-05 12:00 |
15:18:26.23 |
-22:15:10.0 |
HIP 74732 |
29.82 |
| 2026-06-06 00:00 |
15:18:14.05 |
-22:14:33.9 |
HIP 74732 |
27.34 |
| 2026-06-06 12:00 |
15:18:01.96 |
-22:13:57.9 |
HIP 74732 |
24.97 |
| 2026-06-07 00:00 |
15:17:49.97 |
-22:13:22.0 |
HIP 74732 |
22.73 |
| 2026-06-07 12:00 |
15:17:38.06 |
-22:12:46.1 |
HIP 74732 |
20.65 |
| 2026-06-08 00:00 |
15:17:26.24 |
-22:12:10.4 |
HIP 74732 |
18.78 |
| 2026-06-08 12:00 |
15:17:14.52 |
-22:11:34.8 |
HIP 74732 |
17.18 |
| 2026-06-09 00:00 |
15:17:02.89 |
-22:10:59.3 |
HIP 74732 |
15.92 |
| 2026-06-09 12:00 |
15:16:51.36 |
-22:10:23.9 |
HIP 74732 |
15.07 |
| 2026-06-10 00:00 |
15:16:39.93 |
-22:09:48.6 |
HIP 74732 |
14.68 |
| 2026-06-10 12:00 |
15:16:28.59 |
-22:09:13.5 |
HIP 74732 |
14.80 |
| 2026-06-11 00:00 |
15:16:17.36 |
-22:08:38.6 |
HIP 74732 |
15.38 |
| 2026-06-11 12:00 |
15:16:06.24 |
-22:08:03.8 |
HIP 74732 |
16.37 |
| 2026-06-12 00:00 |
15:15:55.21 |
-22:07:29.2 |
HIP 74732 |
17.69 |
| 2026-06-12 12:00 |
15:15:44.30 |
-22:06:54.8 |
HIP 74732 |
19.26 |
| 2026-06-13 00:00 |
15:15:33.49 |
-22:06:20.5 |
HIP 74732 |
21.02 |
| 2026-06-13 12:00 |
15:15:22.79 |
-22:05:46.5 |
HIP 74732 |
22.92 |
| 2026-06-14 00:00 |
15:15:12.20 |
-22:05:12.6 |
HIP 74732 |
24.91 |
| 2026-06-14 12:00 |
15:15:01.73 |
-22:04:39.0 |
HIP 74586 |
25.30 |
| 2026-06-15 00:00 |
15:14:51.37 |
-22:04:05.6 |
HIP 74477 |
24.97 |
| 2026-06-15 12:00 |
15:14:41.12 |
-22:03:32.4 |
HIP 74477 |
22.53 |
| 2026-06-16 00:00 |
15:14:30.99 |
-22:02:59.4 |
HIP 74477 |
20.12 |
| 2026-06-16 12:00 |
15:14:20.98 |
-22:02:26.7 |
HIP 74477 |
17.74 |
| 2026-06-17 00:00 |
15:14:11.09 |
-22:01:54.2 |
HIP 74477 |
15.38 |
| 2026-06-17 12:00 |
15:14:01.32 |
-22:01:22.0 |
HIP 74477 |
13.06 |
| 2026-06-18 00:00 |
15:13:51.68 |
-22:00:50.1 |
HIP 74477 |
10.76 |
| 2026-06-18 12:00 |
15:13:42.15 |
-22:00:18.4 |
HIP 74477 |
8.49 |
| 2026-06-19 00:00 |
15:13:32.75 |
-21:59:47.0 |
HIP 74477 |
6.25 |
| 2026-06-19 12:00 |
15:13:23.48 |
-21:59:15.9 |
HIP 74477 |
4.04 |
| 2026-06-20 00:00 |
15:13:14.33 |
-21:58:45.1 |
HIP 74477 |
1.88 |
| 2026-06-20 12:00 |
15:13:05.32 |
-21:58:14.6 |
HIP 74477 |
0.45 |
| 2026-06-21 00:00 |
15:12:56.43 |
-21:57:44.4 |
HIP 74477 |
2.45 |
| 2026-06-21 12:00 |
15:12:47.67 |
-21:57:14.5 |
HIP 74477 |
4.53 |
| 2026-06-22 00:00 |
15:12:39.04 |
-21:56:44.9 |
HIP 74477 |
6.59 |