C/2002 K1 (NEAT)
メタデータ
| 項目 |
値 |
| Designation |
C/2002 K1 (NEAT) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2002-06-16T10:53:15.109440Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:15Z |
| Obs used |
72 |
| NEO |
- |
| M1 |
11.400 |
| K1 |
10.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2002-06-23.0000000 |
| e |
0.99963588 |
| q (au) |
3.230234 |
| a (au) |
8871.406661 |
| i (deg) |
89.721779 |
| Ω (om, deg) |
280.548361 |
| ω (w, deg) |
4.460611 |
| M (ma, deg) |
0.000008 |
等級
散乱 + 全体線形
$$
M_a = (12.822 + 2.135\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
12.822 |
| n |
2.135 |
| gf |
1.000 |
| gb |
-0.998 |
| k |
1.000 |
| δ90 |
10.000 |
| 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 |
06:53:29.23 |
+50:38:37.7 |
HIP 32987 |
11.11 |
| 2026-02-03 12:00 |
06:53:25.43 |
+50:38:27.9 |
HIP 32987 |
10.55 |
| 2026-02-04 00:00 |
06:53:21.66 |
+50:38:17.9 |
HIP 32987 |
10.00 |
| 2026-02-04 12:00 |
06:53:17.91 |
+50:38:07.8 |
HIP 32987 |
9.46 |
| 2026-02-05 00:00 |
06:53:14.18 |
+50:37:57.5 |
HIP 32987 |
8.93 |
| 2026-02-05 12:00 |
06:53:10.47 |
+50:37:47.0 |
HIP 32987 |
8.42 |
| 2026-02-06 00:00 |
06:53:06.78 |
+50:37:36.3 |
HIP 32987 |
7.93 |
| 2026-02-06 12:00 |
06:53:03.12 |
+50:37:25.5 |
HIP 32987 |
7.46 |
| 2026-02-07 00:00 |
06:52:59.48 |
+50:37:14.6 |
HIP 32987 |
7.02 |
| 2026-02-07 12:00 |
06:52:55.87 |
+50:37:03.4 |
HIP 32987 |
6.61 |
| 2026-02-08 00:00 |
06:52:52.28 |
+50:36:52.1 |
HIP 32987 |
6.23 |
| 2026-02-08 12:00 |
06:52:48.72 |
+50:36:40.7 |
HIP 32987 |
5.90 |
| 2026-02-09 00:00 |
06:52:45.18 |
+50:36:29.1 |
HIP 32987 |
5.61 |
| 2026-02-09 12:00 |
06:52:41.66 |
+50:36:17.3 |
HIP 32987 |
5.38 |
| 2026-02-10 00:00 |
06:52:38.17 |
+50:36:05.4 |
HIP 32987 |
5.21 |
| 2026-02-10 12:00 |
06:52:34.71 |
+50:35:53.4 |
HIP 32987 |
5.11 |
| 2026-02-11 00:00 |
06:52:31.27 |
+50:35:41.1 |
HIP 32987 |
5.08 |
| 2026-02-11 12:00 |
06:52:27.85 |
+50:35:28.8 |
HIP 32987 |
5.11 |
| 2026-02-12 00:00 |
06:52:24.47 |
+50:35:16.2 |
HIP 32987 |
5.22 |
| 2026-02-12 12:00 |
06:52:21.11 |
+50:35:03.5 |
HIP 32987 |
5.38 |
| 2026-02-13 00:00 |
06:52:17.78 |
+50:34:50.7 |
HIP 32987 |
5.61 |
| 2026-02-13 12:00 |
06:52:14.47 |
+50:34:37.7 |
HIP 32987 |
5.88 |
| 2026-02-14 00:00 |
06:52:11.19 |
+50:34:24.6 |
HIP 32987 |
6.19 |
| 2026-02-14 12:00 |
06:52:07.94 |
+50:34:11.3 |
HIP 32987 |
6.54 |
| 2026-02-15 00:00 |
06:52:04.72 |
+50:33:57.9 |
HIP 32987 |
6.92 |
| 2026-02-15 12:00 |
06:52:01.53 |
+50:33:44.4 |
HIP 32987 |
7.32 |
| 2026-02-16 00:00 |
06:51:58.36 |
+50:33:30.7 |
HIP 32987 |
7.74 |
| 2026-02-16 12:00 |
06:51:55.22 |
+50:33:16.8 |
HIP 32987 |
8.17 |
| 2026-02-17 00:00 |
06:51:52.12 |
+50:33:02.8 |
HIP 32987 |
8.62 |
| 2026-02-17 12:00 |
06:51:49.04 |
+50:32:48.7 |
HIP 32987 |
9.08 |
| 2026-02-18 00:00 |
06:51:45.99 |
+50:32:34.4 |
HIP 32987 |
9.54 |
| 2026-02-18 12:00 |
06:51:42.97 |
+50:32:20.0 |
HIP 32987 |
10.01 |
| 2026-02-19 00:00 |
06:51:39.98 |
+50:32:05.5 |
HIP 32987 |
10.49 |
| 2026-02-19 12:00 |
06:51:37.02 |
+50:31:50.8 |
HIP 32987 |
10.97 |
| 2026-02-20 00:00 |
06:51:34.09 |
+50:31:36.0 |
HIP 32987 |
11.46 |
| 2026-02-20 12:00 |
06:51:31.19 |
+50:31:21.1 |
HIP 32987 |
11.94 |
| 2026-02-21 00:00 |
06:51:28.33 |
+50:31:06.0 |
HIP 32987 |
12.43 |
| 2026-02-21 12:00 |
06:51:25.49 |
+50:30:50.8 |
HIP 32987 |
12.92 |
| 2026-02-22 00:00 |
06:51:22.69 |
+50:30:35.5 |
HIP 32987 |
13.41 |
| 2026-02-22 12:00 |
06:51:19.91 |
+50:30:20.0 |
HIP 32987 |
13.90 |
| 2026-02-23 00:00 |
06:51:17.17 |
+50:30:04.4 |
HIP 32987 |
14.39 |
| 2026-02-23 12:00 |
06:51:14.46 |
+50:29:48.7 |
HIP 32987 |
14.88 |
| 2026-02-24 00:00 |
06:51:11.78 |
+50:29:32.9 |
HIP 32987 |
15.36 |