C/2018 KJ3 (Lemmon)
メタデータ
| 項目 |
値 |
| Designation |
C/2018 KJ3 (Lemmon) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2019-09-09T23:33:42.448320Z |
| Orbit solution date (soln_date, UTC) |
2021-09-04T23:42:57Z |
| Obs used |
465 |
| NEO |
- |
| M1 |
6.400 |
| K1 |
13.500 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2018-08-10.0000000 |
| e |
0.99581434 |
| q (au) |
3.627197 |
| a (au) |
866.577156 |
| i (deg) |
136.667328 |
| Ω (om, deg) |
91.587697 |
| ω (w, deg) |
217.709783 |
| M (ma, deg) |
359.984701 |
等級
散乱 + 全体線形
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 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 |
06:52:24.83 |
+09:52:14.7 |
HIP 32926 |
28.52 |
| 2026-02-03 12:00 |
06:52:17.45 |
+09:52:50.8 |
HIP 32926 |
28.36 |
| 2026-02-04 00:00 |
06:52:10.11 |
+09:53:27.0 |
HIP 32926 |
28.33 |
| 2026-02-04 12:00 |
06:52:02.81 |
+09:54:03.4 |
HIP 32926 |
28.44 |
| 2026-02-05 00:00 |
06:51:55.55 |
+09:54:39.8 |
HIP 32785 |
27.50 |
| 2026-02-05 12:00 |
06:51:48.34 |
+09:55:16.3 |
HIP 32785 |
25.63 |
| 2026-02-06 00:00 |
06:51:41.18 |
+09:55:52.9 |
HIP 32785 |
23.77 |
| 2026-02-06 12:00 |
06:51:34.05 |
+09:56:29.6 |
HIP 32785 |
21.92 |
| 2026-02-07 00:00 |
06:51:26.98 |
+09:57:06.4 |
HIP 32785 |
20.08 |
| 2026-02-07 12:00 |
06:51:19.95 |
+09:57:43.3 |
HIP 32785 |
18.25 |
| 2026-02-08 00:00 |
06:51:12.96 |
+09:58:20.3 |
HIP 32785 |
16.44 |
| 2026-02-08 12:00 |
06:51:06.02 |
+09:58:57.3 |
HIP 32785 |
14.64 |
| 2026-02-09 00:00 |
06:50:59.13 |
+09:59:34.4 |
HIP 32785 |
12.86 |
| 2026-02-09 12:00 |
06:50:52.28 |
+10:00:11.7 |
HIP 32785 |
11.09 |
| 2026-02-10 00:00 |
06:50:45.49 |
+10:00:48.9 |
HIP 32785 |
9.35 |
| 2026-02-10 12:00 |
06:50:38.74 |
+10:01:26.3 |
HIP 32785 |
7.64 |
| 2026-02-11 00:00 |
06:50:32.04 |
+10:02:03.7 |
HIP 32785 |
5.99 |
| 2026-02-11 12:00 |
06:50:25.39 |
+10:02:41.2 |
HIP 32785 |
4.43 |
| 2026-02-12 00:00 |
06:50:18.79 |
+10:03:18.8 |
HIP 32785 |
3.09 |
| 2026-02-12 12:00 |
06:50:12.24 |
+10:03:56.5 |
HIP 32785 |
2.37 |
| 2026-02-13 00:00 |
06:50:05.74 |
+10:04:34.2 |
HIP 32785 |
2.77 |
| 2026-02-13 12:00 |
06:49:59.30 |
+10:05:11.9 |
HIP 32785 |
3.94 |
| 2026-02-14 00:00 |
06:49:52.90 |
+10:05:49.7 |
HIP 32785 |
5.40 |
| 2026-02-14 12:00 |
06:49:46.56 |
+10:06:27.6 |
HIP 32785 |
6.96 |
| 2026-02-15 00:00 |
06:49:40.27 |
+10:07:05.6 |
HIP 32785 |
8.56 |
| 2026-02-15 12:00 |
06:49:34.03 |
+10:07:43.5 |
HIP 32785 |
10.17 |
| 2026-02-16 00:00 |
06:49:27.85 |
+10:08:21.6 |
HIP 32785 |
11.78 |
| 2026-02-16 12:00 |
06:49:21.72 |
+10:08:59.7 |
HIP 32785 |
13.39 |
| 2026-02-17 00:00 |
06:49:15.65 |
+10:09:37.8 |
HIP 32785 |
15.00 |
| 2026-02-17 12:00 |
06:49:09.63 |
+10:10:16.0 |
HIP 32785 |
16.60 |
| 2026-02-18 00:00 |
06:49:03.66 |
+10:10:54.2 |
HIP 32785 |
18.18 |
| 2026-02-18 12:00 |
06:48:57.75 |
+10:11:32.4 |
HIP 32785 |
19.76 |
| 2026-02-19 00:00 |
06:48:51.90 |
+10:12:10.7 |
HIP 32785 |
21.33 |
| 2026-02-19 12:00 |
06:48:46.10 |
+10:12:49.0 |
HIP 32785 |
22.89 |
| 2026-02-20 00:00 |
06:48:40.36 |
+10:13:27.4 |
HIP 32785 |
24.44 |
| 2026-02-20 12:00 |
06:48:34.68 |
+10:14:05.8 |
HIP 32785 |
25.97 |
| 2026-02-21 00:00 |
06:48:29.05 |
+10:14:44.2 |
HIP 32509 |
25.33 |
| 2026-02-21 12:00 |
06:48:23.48 |
+10:15:22.6 |
HIP 32509 |
24.58 |
| 2026-02-22 00:00 |
06:48:17.97 |
+10:16:01.0 |
HIP 32509 |
23.90 |
| 2026-02-22 12:00 |
06:48:12.52 |
+10:16:39.5 |
HIP 32509 |
23.32 |
| 2026-02-23 00:00 |
06:48:07.13 |
+10:17:18.0 |
HIP 32509 |
22.83 |
| 2026-02-23 12:00 |
06:48:01.79 |
+10:17:56.5 |
HIP 32509 |
22.43 |
| 2026-02-24 00:00 |
06:47:56.52 |
+10:18:35.0 |
HIP 32509 |
22.13 |