メタデータ
| 項目 |
値 |
| Designation |
C/2002 K2 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2002-01-05T20:02:48.010560Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:16Z |
| Obs used |
136 |
| NEO |
- |
| M1 |
7.500 |
| K1 |
11.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2002-06-25.0000000 |
| e |
0.99313694 |
| q (au) |
5.235061 |
| a (au) |
762.787805 |
| i (deg) |
130.895647 |
| Ω (om, deg) |
294.556678 |
| ω (w, deg) |
26.665091 |
| M (ma, deg) |
0.007961 |
等級
散乱 + 全体線形
$$
M_a = (8.268 + 3.515\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
8.268 |
| n |
3.515 |
| gf |
0.999 |
| gb |
-1.000 |
| k |
1.000 |
| δ90 |
9.999 |
| 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) |
| 2026-05-12 00:00 |
08:29:18.03 |
+29:41:30.8 |
HIP 41632 |
13.36 |
| 2026-05-12 12:00 |
08:29:18.67 |
+29:41:18.9 |
HIP 41632 |
13.16 |
| 2026-05-13 00:00 |
08:29:19.32 |
+29:41:07.1 |
HIP 41632 |
12.97 |
| 2026-05-13 12:00 |
08:29:20.00 |
+29:40:55.1 |
HIP 41632 |
12.78 |
| 2026-05-14 00:00 |
08:29:20.71 |
+29:40:43.1 |
HIP 41632 |
12.59 |
| 2026-05-14 12:00 |
08:29:21.44 |
+29:40:31.1 |
HIP 41632 |
12.41 |
| 2026-05-15 00:00 |
08:29:22.19 |
+29:40:19.0 |
HIP 41632 |
12.22 |
| 2026-05-15 12:00 |
08:29:22.97 |
+29:40:06.8 |
HIP 41632 |
12.04 |
| 2026-05-16 00:00 |
08:29:23.78 |
+29:39:54.6 |
HIP 41632 |
11.86 |
| 2026-05-16 12:00 |
08:29:24.61 |
+29:39:42.4 |
HIP 41632 |
11.68 |
| 2026-05-17 00:00 |
08:29:25.46 |
+29:39:30.1 |
HIP 41632 |
11.51 |
| 2026-05-17 12:00 |
08:29:26.33 |
+29:39:17.7 |
HIP 41632 |
11.34 |
| 2026-05-18 00:00 |
08:29:27.23 |
+29:39:05.3 |
HIP 41632 |
11.18 |
| 2026-05-18 12:00 |
08:29:28.16 |
+29:38:52.8 |
HIP 41632 |
11.02 |
| 2026-05-19 00:00 |
08:29:29.11 |
+29:38:40.3 |
HIP 41632 |
10.87 |
| 2026-05-19 12:00 |
08:29:30.08 |
+29:38:27.8 |
HIP 41632 |
10.72 |
| 2026-05-20 00:00 |
08:29:31.07 |
+29:38:15.2 |
HIP 41632 |
10.58 |
| 2026-05-20 12:00 |
08:29:32.09 |
+29:38:02.5 |
HIP 41632 |
10.45 |
| 2026-05-21 00:00 |
08:29:33.13 |
+29:37:49.9 |
HIP 41632 |
10.33 |
| 2026-05-21 12:00 |
08:29:34.20 |
+29:37:37.1 |
HIP 41632 |
10.22 |
| 2026-05-22 00:00 |
08:29:35.29 |
+29:37:24.4 |
HIP 41632 |
10.12 |
| 2026-05-22 12:00 |
08:29:36.40 |
+29:37:11.5 |
HIP 41632 |
10.02 |
| 2026-05-23 00:00 |
08:29:37.53 |
+29:36:58.7 |
HIP 41632 |
9.94 |
| 2026-05-23 12:00 |
08:29:38.69 |
+29:36:45.8 |
HIP 41632 |
9.87 |
| 2026-05-24 00:00 |
08:29:39.87 |
+29:36:32.9 |
HIP 41632 |
9.82 |
| 2026-05-24 12:00 |
08:29:41.07 |
+29:36:19.9 |
HIP 41632 |
9.77 |
| 2026-05-25 00:00 |
08:29:42.29 |
+29:36:06.9 |
HIP 41632 |
9.74 |
| 2026-05-25 12:00 |
08:29:43.54 |
+29:35:53.8 |
HIP 41632 |
9.73 |
| 2026-05-26 00:00 |
08:29:44.80 |
+29:35:40.7 |
HIP 41632 |
9.73 |
| 2026-05-26 12:00 |
08:29:46.09 |
+29:35:27.6 |
HIP 41632 |
9.74 |
| 2026-05-27 00:00 |
08:29:47.40 |
+29:35:14.5 |
HIP 41632 |
9.78 |
| 2026-05-27 12:00 |
08:29:48.74 |
+29:35:01.3 |
HIP 41632 |
9.82 |
| 2026-05-28 00:00 |
08:29:50.09 |
+29:34:48.1 |
HIP 41632 |
9.89 |
| 2026-05-28 12:00 |
08:29:51.46 |
+29:34:34.8 |
HIP 41632 |
9.97 |
| 2026-05-29 00:00 |
08:29:52.86 |
+29:34:21.5 |
HIP 41632 |
10.06 |
| 2026-05-29 12:00 |
08:29:54.28 |
+29:34:08.2 |
HIP 41632 |
10.18 |
| 2026-05-30 00:00 |
08:29:55.72 |
+29:33:54.9 |
HIP 41632 |
10.31 |
| 2026-05-30 12:00 |
08:29:57.18 |
+29:33:41.5 |
HIP 41632 |
10.45 |
| 2026-05-31 00:00 |
08:29:58.65 |
+29:33:28.1 |
HIP 41632 |
10.61 |
| 2026-05-31 12:00 |
08:30:00.15 |
+29:33:14.7 |
HIP 41632 |
10.79 |
| 2026-06-01 00:00 |
08:30:01.68 |
+29:33:01.2 |
HIP 41632 |
10.98 |
| 2026-06-01 12:00 |
08:30:03.22 |
+29:32:47.7 |
HIP 41632 |
11.19 |
| 2026-06-02 00:00 |
08:30:04.78 |
+29:32:34.2 |
HIP 41632 |
11.41 |