メタデータ
| 項目 |
値 |
| Designation |
C/2019 NJ3 (Lemmon) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2020-10-22T02:23:32.611200Z |
| Orbit solution date (soln_date, UTC) |
2026-03-11T21:13:02Z |
| Obs used |
70 |
| NEO |
- |
| M1 |
6.600 |
| K1 |
13.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2020-03-25.0000000 |
| e |
1.00093598 |
| q (au) |
4.361928 |
| a (au) |
-4660.256154 |
| i (deg) |
99.435702 |
| Ω (om, deg) |
142.451880 |
| ω (w, deg) |
246.812804 |
| M (ma, deg) |
-0.000654 |
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 |
09:25:15.52 |
+15:46:39.7 |
HIP 46397 |
34.70 |
| 2026-06-01 12:00 |
09:25:18.69 |
+15:46:48.5 |
HIP 46397 |
33.95 |
| 2026-06-02 00:00 |
09:25:21.91 |
+15:46:56.9 |
HIP 46397 |
33.19 |
| 2026-06-02 12:00 |
09:25:25.18 |
+15:47:05.1 |
HIP 46397 |
32.41 |
| 2026-06-03 00:00 |
09:25:28.51 |
+15:47:13.0 |
HIP 46397 |
31.62 |
| 2026-06-03 12:00 |
09:25:31.90 |
+15:47:20.6 |
HIP 46397 |
30.82 |
| 2026-06-04 00:00 |
09:25:35.34 |
+15:47:27.8 |
HIP 46397 |
30.01 |
| 2026-06-04 12:00 |
09:25:38.83 |
+15:47:34.8 |
HIP 46397 |
29.19 |
| 2026-06-05 00:00 |
09:25:42.38 |
+15:47:41.6 |
HIP 46397 |
28.35 |
| 2026-06-05 12:00 |
09:25:45.99 |
+15:47:48.0 |
HIP 46397 |
27.50 |
| 2026-06-06 00:00 |
09:25:49.64 |
+15:47:54.1 |
HIP 46397 |
26.64 |
| 2026-06-06 12:00 |
09:25:53.35 |
+15:48:00.0 |
HIP 46397 |
25.77 |
| 2026-06-07 00:00 |
09:25:57.11 |
+15:48:05.6 |
HIP 46397 |
24.89 |
| 2026-06-07 12:00 |
09:26:00.93 |
+15:48:10.9 |
HIP 46397 |
23.99 |
| 2026-06-08 00:00 |
09:26:04.80 |
+15:48:15.9 |
HIP 46397 |
23.09 |
| 2026-06-08 12:00 |
09:26:08.71 |
+15:48:20.7 |
HIP 46397 |
22.17 |
| 2026-06-09 00:00 |
09:26:12.69 |
+15:48:25.1 |
HIP 46397 |
21.24 |
| 2026-06-09 12:00 |
09:26:16.71 |
+15:48:29.3 |
HIP 46397 |
20.31 |
| 2026-06-10 00:00 |
09:26:20.78 |
+15:48:33.3 |
HIP 46397 |
19.36 |
| 2026-06-10 12:00 |
09:26:24.91 |
+15:48:36.9 |
HIP 46397 |
18.40 |
| 2026-06-11 00:00 |
09:26:29.08 |
+15:48:40.3 |
HIP 46397 |
17.44 |
| 2026-06-11 12:00 |
09:26:33.31 |
+15:48:43.5 |
HIP 46397 |
16.47 |
| 2026-06-12 00:00 |
09:26:37.58 |
+15:48:46.3 |
HIP 46397 |
15.49 |
| 2026-06-12 12:00 |
09:26:41.91 |
+15:48:48.9 |
HIP 46397 |
14.50 |
| 2026-06-13 00:00 |
09:26:46.28 |
+15:48:51.3 |
HIP 46397 |
13.52 |
| 2026-06-13 12:00 |
09:26:50.70 |
+15:48:53.3 |
HIP 46397 |
12.52 |
| 2026-06-14 00:00 |
09:26:55.17 |
+15:48:55.2 |
HIP 46397 |
11.54 |
| 2026-06-14 12:00 |
09:26:59.69 |
+15:48:56.7 |
HIP 46397 |
10.55 |
| 2026-06-15 00:00 |
09:27:04.26 |
+15:48:58.0 |
HIP 46397 |
9.57 |
| 2026-06-15 12:00 |
09:27:08.87 |
+15:48:59.1 |
HIP 46397 |
8.62 |
| 2026-06-16 00:00 |
09:27:13.53 |
+15:48:59.9 |
HIP 46397 |
7.69 |
| 2026-06-16 12:00 |
09:27:18.24 |
+15:49:00.5 |
HIP 46397 |
6.81 |
| 2026-06-17 00:00 |
09:27:22.99 |
+15:49:00.8 |
HIP 46397 |
6.00 |
| 2026-06-17 12:00 |
09:27:27.79 |
+15:49:00.8 |
HIP 46397 |
5.31 |
| 2026-06-18 00:00 |
09:27:32.63 |
+15:49:00.7 |
HIP 46397 |
4.80 |
| 2026-06-18 12:00 |
09:27:37.52 |
+15:49:00.2 |
HIP 46397 |
4.52 |
| 2026-06-19 00:00 |
09:27:42.46 |
+15:48:59.6 |
HIP 46397 |
4.55 |
| 2026-06-19 12:00 |
09:27:47.43 |
+15:48:58.7 |
HIP 46397 |
4.87 |
| 2026-06-20 00:00 |
09:27:52.45 |
+15:48:57.6 |
HIP 46397 |
5.44 |
| 2026-06-20 12:00 |
09:27:57.52 |
+15:48:56.2 |
HIP 46397 |
6.21 |
| 2026-06-21 00:00 |
09:28:02.62 |
+15:48:54.7 |
HIP 46397 |
7.10 |
| 2026-06-21 12:00 |
09:28:07.77 |
+15:48:52.8 |
HIP 46397 |
8.10 |
| 2026-06-22 00:00 |
09:28:12.96 |
+15:48:50.8 |
HIP 46397 |
9.15 |