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
$$
M_a = (12.814 + 2.141\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
12.814 |
| n |
2.141 |
| gf |
1.000 |
| gb |
-0.502 |
| 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) |
| 2026-07-29 00:00 |
07:00:35.36 |
+49:14:21.5 |
HIP 34029 |
30.36 |
| 2026-07-29 12:00 |
07:00:39.00 |
+49:14:22.5 |
HIP 34029 |
29.79 |
| 2026-07-30 00:00 |
07:00:42.63 |
+49:14:23.7 |
HIP 34029 |
29.22 |
| 2026-07-30 12:00 |
07:00:46.25 |
+49:14:25.0 |
HIP 34029 |
28.65 |
| 2026-07-31 00:00 |
07:00:49.85 |
+49:14:26.5 |
HIP 34029 |
28.09 |
| 2026-07-31 12:00 |
07:00:53.44 |
+49:14:28.1 |
HIP 34029 |
27.53 |
| 2026-08-01 00:00 |
07:00:57.02 |
+49:14:29.8 |
HIP 34029 |
26.97 |
| 2026-08-01 12:00 |
07:01:00.58 |
+49:14:31.7 |
HIP 34029 |
26.42 |
| 2026-08-02 00:00 |
07:01:04.13 |
+49:14:33.7 |
HIP 34029 |
25.87 |
| 2026-08-02 12:00 |
07:01:07.67 |
+49:14:35.8 |
HIP 34029 |
25.32 |
| 2026-08-03 00:00 |
07:01:11.19 |
+49:14:38.1 |
HIP 34029 |
24.79 |
| 2026-08-03 12:00 |
07:01:14.70 |
+49:14:40.6 |
HIP 34029 |
24.25 |
| 2026-08-04 00:00 |
07:01:18.20 |
+49:14:43.1 |
HIP 34029 |
23.72 |
| 2026-08-04 12:00 |
07:01:21.68 |
+49:14:45.9 |
HIP 34029 |
23.19 |
| 2026-08-05 00:00 |
07:01:25.14 |
+49:14:48.7 |
HIP 34029 |
22.68 |
| 2026-08-05 12:00 |
07:01:28.59 |
+49:14:51.7 |
HIP 34029 |
22.16 |
| 2026-08-06 00:00 |
07:01:32.02 |
+49:14:54.8 |
HIP 34029 |
21.65 |
| 2026-08-06 12:00 |
07:01:35.44 |
+49:14:58.1 |
HIP 34029 |
21.15 |
| 2026-08-07 00:00 |
07:01:38.84 |
+49:15:01.5 |
HIP 34029 |
20.65 |
| 2026-08-07 12:00 |
07:01:42.23 |
+49:15:05.1 |
HIP 34029 |
20.16 |
| 2026-08-08 00:00 |
07:01:45.60 |
+49:15:08.8 |
HIP 34029 |
19.68 |
| 2026-08-08 12:00 |
07:01:48.95 |
+49:15:12.6 |
HIP 34029 |
19.21 |
| 2026-08-09 00:00 |
07:01:52.29 |
+49:15:16.6 |
HIP 34029 |
18.74 |
| 2026-08-09 12:00 |
07:01:55.61 |
+49:15:20.7 |
HIP 34029 |
18.28 |
| 2026-08-10 00:00 |
07:01:58.91 |
+49:15:24.9 |
HIP 34029 |
17.83 |
| 2026-08-10 12:00 |
07:02:02.19 |
+49:15:29.3 |
HIP 34029 |
17.39 |
| 2026-08-11 00:00 |
07:02:05.45 |
+49:15:33.8 |
HIP 34029 |
16.95 |
| 2026-08-11 12:00 |
07:02:08.70 |
+49:15:38.5 |
HIP 34029 |
16.53 |
| 2026-08-12 00:00 |
07:02:11.93 |
+49:15:43.3 |
HIP 34029 |
16.12 |
| 2026-08-12 12:00 |
07:02:15.14 |
+49:15:48.2 |
HIP 34029 |
15.72 |
| 2026-08-13 00:00 |
07:02:18.33 |
+49:15:53.3 |
HIP 34029 |
15.33 |
| 2026-08-13 12:00 |
07:02:21.50 |
+49:15:58.5 |
HIP 34029 |
14.95 |
| 2026-08-14 00:00 |
07:02:24.66 |
+49:16:03.8 |
HIP 34029 |
14.59 |
| 2026-08-14 12:00 |
07:02:27.79 |
+49:16:09.3 |
HIP 34029 |
14.24 |
| 2026-08-15 00:00 |
07:02:30.90 |
+49:16:14.9 |
HIP 34029 |
13.90 |
| 2026-08-15 12:00 |
07:02:33.99 |
+49:16:20.6 |
HIP 34029 |
13.58 |
| 2026-08-16 00:00 |
07:02:37.07 |
+49:16:26.5 |
HIP 34029 |
13.28 |
| 2026-08-16 12:00 |
07:02:40.12 |
+49:16:32.5 |
HIP 34029 |
12.99 |
| 2026-08-17 00:00 |
07:02:43.15 |
+49:16:38.6 |
HIP 34029 |
12.73 |
| 2026-08-17 12:00 |
07:02:46.16 |
+49:16:44.9 |
HIP 34029 |
12.47 |
| 2026-08-18 00:00 |
07:02:49.15 |
+49:16:51.3 |
HIP 34029 |
12.24 |
| 2026-08-18 12:00 |
07:02:52.12 |
+49:16:57.8 |
HIP 34029 |
12.03 |
| 2026-08-19 00:00 |
07:02:55.06 |
+49:17:04.5 |
HIP 34029 |
11.84 |