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) |
| 2026-09-20 00:00 |
05:19:38.39 |
+37:47:31.0 |
HIP 24885 |
8.73 |
| 2026-09-20 12:00 |
05:19:37.98 |
+37:47:38.9 |
HIP 24885 |
8.67 |
| 2026-09-21 00:00 |
05:19:37.54 |
+37:47:46.8 |
HIP 24885 |
8.62 |
| 2026-09-21 12:00 |
05:19:37.07 |
+37:47:54.7 |
HIP 24885 |
8.58 |
| 2026-09-22 00:00 |
05:19:36.58 |
+37:48:02.5 |
HIP 24885 |
8.54 |
| 2026-09-22 12:00 |
05:19:36.06 |
+37:48:10.3 |
HIP 24885 |
8.51 |
| 2026-09-23 00:00 |
05:19:35.51 |
+37:48:18.0 |
HIP 24885 |
8.48 |
| 2026-09-23 12:00 |
05:19:34.94 |
+37:48:25.8 |
HIP 24885 |
8.47 |
| 2026-09-24 00:00 |
05:19:34.35 |
+37:48:33.5 |
HIP 24885 |
8.46 |
| 2026-09-24 12:00 |
05:19:33.72 |
+37:48:41.2 |
HIP 24885 |
8.45 |
| 2026-09-25 00:00 |
05:19:33.08 |
+37:48:48.8 |
HIP 24885 |
8.46 |
| 2026-09-25 12:00 |
05:19:32.40 |
+37:48:56.4 |
HIP 24885 |
8.47 |
| 2026-09-26 00:00 |
05:19:31.70 |
+37:49:04.0 |
HIP 24885 |
8.50 |
| 2026-09-26 12:00 |
05:19:30.98 |
+37:49:11.5 |
HIP 24885 |
8.53 |
| 2026-09-27 00:00 |
05:19:30.23 |
+37:49:19.0 |
HIP 24885 |
8.56 |
| 2026-09-27 12:00 |
05:19:29.45 |
+37:49:26.5 |
HIP 24885 |
8.61 |
| 2026-09-28 00:00 |
05:19:28.65 |
+37:49:33.9 |
HIP 24885 |
8.67 |
| 2026-09-28 12:00 |
05:19:27.82 |
+37:49:41.3 |
HIP 24885 |
8.73 |
| 2026-09-29 00:00 |
05:19:26.97 |
+37:49:48.6 |
HIP 24885 |
8.81 |
| 2026-09-29 12:00 |
05:19:26.09 |
+37:49:55.9 |
HIP 24885 |
8.89 |
| 2026-09-30 00:00 |
05:19:25.18 |
+37:50:03.2 |
HIP 24885 |
8.98 |
| 2026-09-30 12:00 |
05:19:24.25 |
+37:50:10.5 |
HIP 24885 |
9.08 |
| 2026-10-01 00:00 |
05:19:23.30 |
+37:50:17.6 |
HIP 24885 |
9.19 |
| 2026-10-01 12:00 |
05:19:22.32 |
+37:50:24.8 |
HIP 24885 |
9.31 |
| 2026-10-02 00:00 |
05:19:21.31 |
+37:50:31.9 |
HIP 24885 |
9.44 |
| 2026-10-02 12:00 |
05:19:20.28 |
+37:50:39.0 |
HIP 24885 |
9.57 |
| 2026-10-03 00:00 |
05:19:19.22 |
+37:50:46.0 |
HIP 24885 |
9.72 |
| 2026-10-03 12:00 |
05:19:18.14 |
+37:50:53.0 |
HIP 24885 |
9.87 |
| 2026-10-04 00:00 |
05:19:17.03 |
+37:50:59.9 |
HIP 24885 |
10.03 |
| 2026-10-04 12:00 |
05:19:15.90 |
+37:51:06.8 |
HIP 24885 |
10.20 |
| 2026-10-05 00:00 |
05:19:14.74 |
+37:51:13.6 |
HIP 24885 |
10.38 |
| 2026-10-05 12:00 |
05:19:13.56 |
+37:51:20.4 |
HIP 24885 |
10.57 |
| 2026-10-06 00:00 |
05:19:12.35 |
+37:51:27.2 |
HIP 24885 |
10.76 |
| 2026-10-06 12:00 |
05:19:11.12 |
+37:51:33.9 |
HIP 24885 |
10.96 |
| 2026-10-07 00:00 |
05:19:09.86 |
+37:51:40.5 |
HIP 24885 |
11.17 |
| 2026-10-07 12:00 |
05:19:08.57 |
+37:51:47.1 |
HIP 24885 |
11.39 |
| 2026-10-08 00:00 |
05:19:07.27 |
+37:51:53.6 |
HIP 24885 |
11.62 |
| 2026-10-08 12:00 |
05:19:05.93 |
+37:52:00.1 |
HIP 24885 |
11.85 |
| 2026-10-09 00:00 |
05:19:04.57 |
+37:52:06.6 |
HIP 24885 |
12.09 |
| 2026-10-09 12:00 |
05:19:03.19 |
+37:52:13.0 |
HIP 24885 |
12.33 |
| 2026-10-10 00:00 |
05:19:01.79 |
+37:52:19.3 |
HIP 24885 |
12.59 |
| 2026-10-10 12:00 |
05:19:00.35 |
+37:52:25.6 |
HIP 24885 |
12.85 |
| 2026-10-11 00:00 |
05:18:58.90 |
+37:52:31.8 |
HIP 24885 |
13.11 |