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) |
| 2026-06-01 00:00 |
06:49:31.63 |
+11:53:55.4 |
HIP 32710 |
11.39 |
| 2026-06-01 12:00 |
06:49:36.63 |
+11:54:09.3 |
HIP 32776 |
11.23 |
| 2026-06-02 00:00 |
06:49:41.65 |
+11:54:23.0 |
HIP 32776 |
10.40 |
| 2026-06-02 12:00 |
06:49:46.69 |
+11:54:36.5 |
HIP 32776 |
9.65 |
| 2026-06-03 00:00 |
06:49:51.76 |
+11:54:49.9 |
HIP 32776 |
9.02 |
| 2026-06-03 12:00 |
06:49:56.85 |
+11:55:03.0 |
HIP 32776 |
8.54 |
| 2026-06-04 00:00 |
06:50:01.96 |
+11:55:16.0 |
HIP 32776 |
8.22 |
| 2026-06-04 12:00 |
06:50:07.10 |
+11:55:28.8 |
HIP 32776 |
8.10 |
| 2026-06-05 00:00 |
06:50:12.26 |
+11:55:41.4 |
HIP 32776 |
8.18 |
| 2026-06-05 12:00 |
06:50:17.44 |
+11:55:53.8 |
HIP 32776 |
8.46 |
| 2026-06-06 00:00 |
06:50:22.65 |
+11:56:06.0 |
HIP 32776 |
8.92 |
| 2026-06-06 12:00 |
06:50:27.88 |
+11:56:18.0 |
HIP 32776 |
9.55 |
| 2026-06-07 00:00 |
06:50:33.12 |
+11:56:29.9 |
HIP 32776 |
10.30 |
| 2026-06-07 12:00 |
06:50:38.39 |
+11:56:41.5 |
HIP 32776 |
11.16 |
| 2026-06-08 00:00 |
06:50:43.68 |
+11:56:53.0 |
HIP 32776 |
12.11 |
| 2026-06-08 12:00 |
06:50:48.99 |
+11:57:04.3 |
HIP 32776 |
13.12 |
| 2026-06-09 00:00 |
06:50:54.32 |
+11:57:15.4 |
HIP 32776 |
14.19 |
| 2026-06-09 12:00 |
06:50:59.67 |
+11:57:26.3 |
HIP 32776 |
15.30 |
| 2026-06-10 00:00 |
06:51:05.03 |
+11:57:37.1 |
HIP 32776 |
16.45 |
| 2026-06-10 12:00 |
06:51:10.42 |
+11:57:47.6 |
HIP 32776 |
17.63 |
| 2026-06-11 00:00 |
06:51:15.82 |
+11:57:58.0 |
HIP 32776 |
18.83 |
| 2026-06-11 12:00 |
06:51:21.24 |
+11:58:08.2 |
HIP 32969 |
19.05 |
| 2026-06-12 00:00 |
06:51:26.68 |
+11:58:18.2 |
HIP 32969 |
18.25 |
| 2026-06-12 12:00 |
06:51:32.14 |
+11:58:28.0 |
HIP 32969 |
17.52 |
| 2026-06-13 00:00 |
06:51:37.61 |
+11:58:37.6 |
HIP 32969 |
16.87 |
| 2026-06-13 12:00 |
06:51:43.10 |
+11:58:47.0 |
HIP 32969 |
16.30 |
| 2026-06-14 00:00 |
06:51:48.60 |
+11:58:56.3 |
HIP 32969 |
15.83 |
| 2026-06-14 12:00 |
06:51:54.12 |
+11:59:05.4 |
HIP 32969 |
15.47 |
| 2026-06-15 00:00 |
06:51:59.66 |
+11:59:14.2 |
HIP 32969 |
15.23 |
| 2026-06-15 12:00 |
06:52:05.21 |
+11:59:23.0 |
HIP 32969 |
15.10 |
| 2026-06-16 00:00 |
06:52:10.77 |
+11:59:31.5 |
HIP 32969 |
15.11 |
| 2026-06-16 12:00 |
06:52:16.34 |
+11:59:39.8 |
HIP 32969 |
15.24 |
| 2026-06-17 00:00 |
06:52:21.93 |
+11:59:48.0 |
HIP 32969 |
15.49 |
| 2026-06-17 12:00 |
06:52:27.54 |
+11:59:56.0 |
HIP 32969 |
15.87 |
| 2026-06-18 00:00 |
06:52:33.15 |
+12:00:03.7 |
HIP 32969 |
16.35 |
| 2026-06-18 12:00 |
06:52:38.78 |
+12:00:11.4 |
HIP 32969 |
16.94 |
| 2026-06-19 00:00 |
06:52:44.41 |
+12:00:18.8 |
HIP 32969 |
17.62 |
| 2026-06-19 12:00 |
06:52:50.06 |
+12:00:26.1 |
HIP 32969 |
18.39 |
| 2026-06-20 00:00 |
06:52:55.72 |
+12:00:33.1 |
HIP 32969 |
19.22 |
| 2026-06-20 12:00 |
06:53:01.39 |
+12:00:40.0 |
HIP 32969 |
20.13 |
| 2026-06-21 00:00 |
06:53:07.07 |
+12:00:46.8 |
HIP 32969 |
21.09 |
| 2026-06-21 12:00 |
06:53:12.75 |
+12:00:53.3 |
HIP 32969 |
22.09 |
| 2026-06-22 00:00 |
06:53:18.45 |
+12:00:59.7 |
HIP 33127 |
22.82 |