メタデータ
| 項目 |
値 |
| Designation |
C/2003 K4 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2004-10-13T17:15:09.331200Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:30Z |
| Obs used |
3625 |
| NEO |
- |
| M1 |
7.500 |
| K1 |
7.000 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2004-06-15.0000000 |
| e |
1.00030070 |
| q (au) |
1.023617 |
| a (au) |
-3404.074214 |
| i (deg) |
134.252518 |
| Ω (om, deg) |
18.675722 |
| ω (w, deg) |
198.442708 |
| M (ma, deg) |
-0.000599 |
等級
散乱 + 全体線形
$$
M_a = (3.808 + 4.917\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
3.808 |
| n |
4.917 |
| gf |
1.000 |
| gb |
-0.895 |
| k |
0.998 |
| δ90 |
9.993 |
| 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 |
01:08:32.16 |
+07:48:13.8 |
HIP 5382 |
17.33 |
| 2026-09-20 12:00 |
01:08:29.63 |
+07:47:59.5 |
HIP 5382 |
17.29 |
| 2026-09-21 00:00 |
01:08:27.10 |
+07:47:45.2 |
HIP 5382 |
17.27 |
| 2026-09-21 12:00 |
01:08:24.55 |
+07:47:30.9 |
HIP 5382 |
17.28 |
| 2026-09-22 00:00 |
01:08:22.00 |
+07:47:16.5 |
HIP 5382 |
17.31 |
| 2026-09-22 12:00 |
01:08:19.43 |
+07:47:02.1 |
HIP 5382 |
17.38 |
| 2026-09-23 00:00 |
01:08:16.86 |
+07:46:47.6 |
HIP 5382 |
17.46 |
| 2026-09-23 12:00 |
01:08:14.29 |
+07:46:33.0 |
HIP 5382 |
17.58 |
| 2026-09-24 00:00 |
01:08:11.71 |
+07:46:18.5 |
HIP 5382 |
17.72 |
| 2026-09-24 12:00 |
01:08:09.12 |
+07:46:03.8 |
HIP 5382 |
17.88 |
| 2026-09-25 00:00 |
01:08:06.52 |
+07:45:49.2 |
HIP 5382 |
18.07 |
| 2026-09-25 12:00 |
01:08:03.92 |
+07:45:34.4 |
HIP 5382 |
18.29 |
| 2026-09-26 00:00 |
01:08:01.31 |
+07:45:19.7 |
HIP 5382 |
18.53 |
| 2026-09-26 12:00 |
01:07:58.69 |
+07:45:04.9 |
HIP 5382 |
18.79 |
| 2026-09-27 00:00 |
01:07:56.07 |
+07:44:50.0 |
HIP 5382 |
19.07 |
| 2026-09-27 12:00 |
01:07:53.44 |
+07:44:35.1 |
HIP 5382 |
19.38 |
| 2026-09-28 00:00 |
01:07:50.81 |
+07:44:20.2 |
HIP 5382 |
19.70 |
| 2026-09-28 12:00 |
01:07:48.17 |
+07:44:05.3 |
HIP 5382 |
20.05 |
| 2026-09-29 00:00 |
01:07:45.53 |
+07:43:50.3 |
HIP 5382 |
20.41 |
| 2026-09-29 12:00 |
01:07:42.88 |
+07:43:35.2 |
HIP 5382 |
20.80 |
| 2026-09-30 00:00 |
01:07:40.23 |
+07:43:20.2 |
HIP 5382 |
21.20 |
| 2026-09-30 12:00 |
01:07:37.57 |
+07:43:05.1 |
HIP 5382 |
21.61 |
| 2026-10-01 00:00 |
01:07:34.91 |
+07:42:49.9 |
HIP 5382 |
22.04 |
| 2026-10-01 12:00 |
01:07:32.25 |
+07:42:34.8 |
HIP 5382 |
22.49 |
| 2026-10-02 00:00 |
01:07:29.58 |
+07:42:19.6 |
HIP 5382 |
22.95 |
| 2026-10-02 12:00 |
01:07:26.90 |
+07:42:04.4 |
HIP 5382 |
23.42 |
| 2026-10-03 00:00 |
01:07:24.23 |
+07:41:49.1 |
HIP 5382 |
23.90 |
| 2026-10-03 12:00 |
01:07:21.55 |
+07:41:33.9 |
HIP 5382 |
24.40 |
| 2026-10-04 00:00 |
01:07:18.86 |
+07:41:18.6 |
HIP 5382 |
24.91 |
| 2026-10-04 12:00 |
01:07:16.17 |
+07:41:03.2 |
HIP 5382 |
25.43 |
| 2026-10-05 00:00 |
01:07:13.48 |
+07:40:47.9 |
HIP 5382 |
25.95 |
| 2026-10-05 12:00 |
01:07:10.79 |
+07:40:32.5 |
HIP 5382 |
26.49 |
| 2026-10-06 00:00 |
01:07:08.10 |
+07:40:17.1 |
HIP 5382 |
27.04 |
| 2026-10-06 12:00 |
01:07:05.40 |
+07:40:01.7 |
HIP 5382 |
27.59 |
| 2026-10-07 00:00 |
01:07:02.70 |
+07:39:46.3 |
HIP 5382 |
28.15 |
| 2026-10-07 12:00 |
01:07:00.00 |
+07:39:30.9 |
HIP 5382 |
28.72 |
| 2026-10-08 00:00 |
01:06:57.30 |
+07:39:15.4 |
HIP 5089 |
29.29 |
| 2026-10-08 12:00 |
01:06:54.59 |
+07:39:00.0 |
HIP 5089 |
28.82 |
| 2026-10-09 00:00 |
01:06:51.89 |
+07:38:44.5 |
HIP 5089 |
28.35 |
| 2026-10-09 12:00 |
01:06:49.18 |
+07:38:29.0 |
HIP 5089 |
27.89 |
| 2026-10-10 00:00 |
01:06:46.48 |
+07:38:13.5 |
HIP 5089 |
27.45 |
| 2026-10-10 12:00 |
01:06:43.77 |
+07:37:58.0 |
HIP 5089 |
27.02 |
| 2026-10-11 00:00 |
01:06:41.06 |
+07:37:42.5 |
HIP 5089 |
26.60 |