メタデータ
| 項目 |
値 |
| Designation |
C/1999 N2 (Lynn) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1999-07-23T01:12:49.584960Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:01Z |
| Obs used |
203 |
| NEO |
- |
| M1 |
10.200 |
| K1 |
7.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1999-08-07.0000000 |
| e |
0.99743788 |
| q (au) |
0.761284 |
| a (au) |
297.130861 |
| i (deg) |
111.655898 |
| Ω (om, deg) |
254.675893 |
| ω (w, deg) |
357.834196 |
| M (ma, deg) |
0.002877 |
等級
散乱 + 全体線形
$$
M_a = (9.119 + 3.568\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
9.119 |
| n |
3.568 |
| gf |
0.800 |
| gb |
-0.711 |
| k |
0.800 |
| δ90 |
1.362 |
| 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 |
05:12:52.98 |
+37:25:05.4 |
HIP 24332 |
6.87 |
| 2026-06-01 12:00 |
05:12:55.87 |
+37:25:05.9 |
HIP 24332 |
6.48 |
| 2026-06-02 00:00 |
05:12:58.77 |
+37:25:06.5 |
HIP 24332 |
6.12 |
| 2026-06-02 12:00 |
05:13:01.67 |
+37:25:07.1 |
HIP 24332 |
5.79 |
| 2026-06-03 00:00 |
05:13:04.58 |
+37:25:07.8 |
HIP 24332 |
5.51 |
| 2026-06-03 12:00 |
05:13:07.49 |
+37:25:08.6 |
HIP 24332 |
5.28 |
| 2026-06-04 00:00 |
05:13:10.40 |
+37:25:09.5 |
HIP 24332 |
5.10 |
| 2026-06-04 12:00 |
05:13:13.31 |
+37:25:10.4 |
HIP 24332 |
4.99 |
| 2026-06-05 00:00 |
05:13:16.22 |
+37:25:11.4 |
HIP 24332 |
4.94 |
| 2026-06-05 12:00 |
05:13:19.14 |
+37:25:12.4 |
HIP 24332 |
4.96 |
| 2026-06-06 00:00 |
05:13:22.06 |
+37:25:13.6 |
HIP 24332 |
5.05 |
| 2026-06-06 12:00 |
05:13:24.98 |
+37:25:14.8 |
HIP 24332 |
5.20 |
| 2026-06-07 00:00 |
05:13:27.90 |
+37:25:16.1 |
HIP 24332 |
5.41 |
| 2026-06-07 12:00 |
05:13:30.82 |
+37:25:17.4 |
HIP 24332 |
5.68 |
| 2026-06-08 00:00 |
05:13:33.75 |
+37:25:18.8 |
HIP 24332 |
5.99 |
| 2026-06-08 12:00 |
05:13:36.67 |
+37:25:20.3 |
HIP 24332 |
6.34 |
| 2026-06-09 00:00 |
05:13:39.60 |
+37:25:21.9 |
HIP 24332 |
6.73 |
| 2026-06-09 12:00 |
05:13:42.53 |
+37:25:23.5 |
HIP 24332 |
7.14 |
| 2026-06-10 00:00 |
05:13:45.45 |
+37:25:25.2 |
HIP 24332 |
7.57 |
| 2026-06-10 12:00 |
05:13:48.38 |
+37:25:27.0 |
HIP 24332 |
8.03 |
| 2026-06-11 00:00 |
05:13:51.31 |
+37:25:28.9 |
HIP 24332 |
8.50 |
| 2026-06-11 12:00 |
05:13:54.24 |
+37:25:30.8 |
HIP 24332 |
8.98 |
| 2026-06-12 00:00 |
05:13:57.16 |
+37:25:32.8 |
HIP 24332 |
9.48 |
| 2026-06-12 12:00 |
05:14:00.09 |
+37:25:34.8 |
HIP 24332 |
9.99 |
| 2026-06-13 00:00 |
05:14:03.01 |
+37:25:36.9 |
HIP 24332 |
10.50 |
| 2026-06-13 12:00 |
05:14:05.94 |
+37:25:39.1 |
HIP 24332 |
11.02 |
| 2026-06-14 00:00 |
05:14:08.86 |
+37:25:41.4 |
HIP 24332 |
11.55 |
| 2026-06-14 12:00 |
05:14:11.78 |
+37:25:43.7 |
HIP 24332 |
12.08 |
| 2026-06-15 00:00 |
05:14:14.70 |
+37:25:46.1 |
HIP 24332 |
12.62 |
| 2026-06-15 12:00 |
05:14:17.62 |
+37:25:48.6 |
HIP 24332 |
13.16 |
| 2026-06-16 00:00 |
05:14:20.54 |
+37:25:51.1 |
HIP 24332 |
13.71 |
| 2026-06-16 12:00 |
05:14:23.45 |
+37:25:53.7 |
HIP 24332 |
14.25 |
| 2026-06-17 00:00 |
05:14:26.36 |
+37:25:56.4 |
HIP 24332 |
14.80 |
| 2026-06-17 12:00 |
05:14:29.27 |
+37:25:59.1 |
HIP 24332 |
15.35 |
| 2026-06-18 00:00 |
05:14:32.18 |
+37:26:01.9 |
HIP 24332 |
15.91 |
| 2026-06-18 12:00 |
05:14:35.08 |
+37:26:04.8 |
HIP 24332 |
16.46 |
| 2026-06-19 00:00 |
05:14:37.98 |
+37:26:07.7 |
HIP 24332 |
17.02 |
| 2026-06-19 12:00 |
05:14:40.87 |
+37:26:10.7 |
HIP 24332 |
17.58 |
| 2026-06-20 00:00 |
05:14:43.77 |
+37:26:13.8 |
HIP 24332 |
18.14 |
| 2026-06-20 12:00 |
05:14:46.65 |
+37:26:16.9 |
HIP 24332 |
18.70 |
| 2026-06-21 00:00 |
05:14:49.54 |
+37:26:20.1 |
HIP 24332 |
19.26 |
| 2026-06-21 12:00 |
05:14:52.42 |
+37:26:23.4 |
HIP 24332 |
19.82 |
| 2026-06-22 00:00 |
05:14:55.29 |
+37:26:26.7 |
HIP 24332 |
20.38 |