423P/Lemmon
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) |
| 2026-02-03 00:00 |
15:40:03.97 |
-21:51:58.6 |
HIP 76790 |
18.24 |
| 2026-02-03 12:00 |
15:40:15.25 |
-21:53:00.3 |
HIP 76790 |
18.00 |
| 2026-02-04 00:00 |
15:40:26.40 |
-21:54:01.6 |
HIP 76790 |
18.21 |
| 2026-02-04 12:00 |
15:40:37.42 |
-21:55:02.5 |
HIP 76790 |
18.83 |
| 2026-02-05 00:00 |
15:40:48.30 |
-21:56:03.0 |
HIP 76903 |
19.15 |
| 2026-02-05 12:00 |
15:40:59.05 |
-21:57:03.1 |
HIP 76903 |
16.82 |
| 2026-02-06 00:00 |
15:41:09.66 |
-21:58:02.8 |
HIP 76903 |
14.65 |
| 2026-02-06 12:00 |
15:41:20.14 |
-21:59:02.0 |
HIP 76903 |
12.70 |
| 2026-02-07 00:00 |
15:41:30.47 |
-22:00:00.9 |
HIP 76903 |
11.05 |
| 2026-02-07 12:00 |
15:41:40.67 |
-22:00:59.3 |
HIP 76903 |
9.83 |
| 2026-02-08 00:00 |
15:41:50.73 |
-22:01:57.3 |
HIP 76903 |
9.19 |
| 2026-02-08 12:00 |
15:42:00.66 |
-22:02:54.9 |
HIP 76903 |
9.22 |
| 2026-02-09 00:00 |
15:42:10.44 |
-22:03:52.0 |
HIP 76903 |
9.89 |
| 2026-02-09 12:00 |
15:42:20.08 |
-22:04:48.8 |
HIP 76903 |
11.07 |
| 2026-02-10 00:00 |
15:42:29.57 |
-22:05:45.1 |
HIP 76903 |
12.59 |
| 2026-02-10 12:00 |
15:42:38.93 |
-22:06:41.0 |
HIP 76903 |
14.33 |
| 2026-02-11 00:00 |
15:42:48.14 |
-22:07:36.5 |
HIP 76903 |
16.20 |
| 2026-02-11 12:00 |
15:42:57.20 |
-22:08:31.5 |
HIP 76903 |
18.15 |
| 2026-02-12 00:00 |
15:43:06.12 |
-22:09:26.1 |
HIP 76903 |
20.15 |
| 2026-02-12 12:00 |
15:43:14.90 |
-22:10:20.3 |
HIP 77082 |
19.69 |
| 2026-02-13 00:00 |
15:43:23.53 |
-22:11:14.1 |
HIP 77082 |
17.59 |
| 2026-02-13 12:00 |
15:43:32.01 |
-22:12:07.4 |
HIP 77082 |
15.53 |
| 2026-02-14 00:00 |
15:43:40.34 |
-22:13:00.3 |
HIP 77082 |
13.53 |
| 2026-02-14 12:00 |
15:43:48.52 |
-22:13:52.7 |
HIP 77082 |
11.61 |
| 2026-02-15 00:00 |
15:43:56.55 |
-22:14:44.8 |
HIP 77082 |
9.78 |
| 2026-02-15 12:00 |
15:44:04.44 |
-22:15:36.3 |
HIP 77082 |
8.08 |
| 2026-02-16 00:00 |
15:44:12.17 |
-22:16:27.5 |
HIP 77082 |
6.57 |
| 2026-02-16 12:00 |
15:44:19.75 |
-22:17:18.2 |
HIP 77082 |
5.40 |
| 2026-02-17 00:00 |
15:44:27.18 |
-22:18:08.5 |
HIP 77082 |
4.76 |
| 2026-02-17 12:00 |
15:44:34.45 |
-22:18:58.3 |
HIP 77082 |
4.82 |
| 2026-02-18 00:00 |
15:44:41.57 |
-22:19:47.7 |
HIP 77082 |
5.53 |
| 2026-02-18 12:00 |
15:44:48.54 |
-22:20:36.6 |
HIP 77082 |
6.66 |
| 2026-02-19 00:00 |
15:44:55.35 |
-22:21:25.1 |
HIP 77082 |
8.00 |
| 2026-02-19 12:00 |
15:45:02.01 |
-22:22:13.1 |
HIP 77082 |
9.45 |
| 2026-02-20 00:00 |
15:45:08.51 |
-22:23:00.7 |
HIP 77082 |
10.94 |
| 2026-02-20 12:00 |
15:45:14.85 |
-22:23:47.9 |
HIP 77082 |
12.45 |
| 2026-02-21 00:00 |
15:45:21.04 |
-22:24:34.6 |
HIP 77082 |
13.96 |
| 2026-02-21 12:00 |
15:45:27.07 |
-22:25:20.9 |
HIP 77082 |
15.46 |
| 2026-02-22 00:00 |
15:45:32.94 |
-22:26:06.7 |
HIP 77082 |
16.93 |
| 2026-02-22 12:00 |
15:45:38.66 |
-22:26:52.0 |
HIP 77191 |
18.35 |
| 2026-02-23 00:00 |
15:45:44.21 |
-22:27:36.9 |
HIP 77191 |
17.58 |
| 2026-02-23 12:00 |
15:45:49.61 |
-22:28:21.4 |
HIP 77191 |
16.91 |
| 2026-02-24 00:00 |
15:45:54.85 |
-22:29:05.4 |
HIP 77191 |
16.34 |