メタデータ
| 項目 |
値 |
| Designation |
C/1998 K3 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1998-03-07T04:25:03.285120Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:53Z |
| Obs used |
178 |
| NEO |
- |
| M1 |
10.000 |
| K1 |
10.000 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1998-06-05.0000000 |
| e |
0.99798200 |
| q (au) |
3.546314 |
| a (au) |
1757.339168 |
| i (deg) |
160.205607 |
| Ω (om, deg) |
307.947616 |
| ω (w, deg) |
47.827040 |
| M (ma, deg) |
0.001202 |
等級
散乱 + 全体線形
$$
M_a = (7.620 + 5.981\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
7.620 |
| n |
5.981 |
| gf |
0.876 |
| gb |
-0.500 |
| k |
0.953 |
| δ90 |
1.000 |
| 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) |
| 2026-05-12 00:00 |
07:27:46.51 |
+16:18:13.0 |
HIP 36406 |
25.79 |
| 2026-05-12 12:00 |
07:27:47.62 |
+16:18:13.0 |
HIP 36406 |
25.54 |
| 2026-05-13 00:00 |
07:27:48.74 |
+16:18:12.9 |
HIP 36406 |
25.28 |
| 2026-05-13 12:00 |
07:27:49.89 |
+16:18:12.8 |
HIP 36406 |
25.02 |
| 2026-05-14 00:00 |
07:27:51.05 |
+16:18:12.6 |
HIP 36406 |
24.76 |
| 2026-05-14 12:00 |
07:27:52.23 |
+16:18:12.4 |
HIP 36406 |
24.49 |
| 2026-05-15 00:00 |
07:27:53.43 |
+16:18:12.1 |
HIP 36406 |
24.22 |
| 2026-05-15 12:00 |
07:27:54.64 |
+16:18:11.7 |
HIP 36406 |
23.95 |
| 2026-05-16 00:00 |
07:27:55.87 |
+16:18:11.3 |
HIP 36406 |
23.67 |
| 2026-05-16 12:00 |
07:27:57.12 |
+16:18:10.9 |
HIP 36406 |
23.38 |
| 2026-05-17 00:00 |
07:27:58.38 |
+16:18:10.4 |
HIP 36406 |
23.10 |
| 2026-05-17 12:00 |
07:27:59.67 |
+16:18:09.8 |
HIP 36406 |
22.81 |
| 2026-05-18 00:00 |
07:28:00.96 |
+16:18:09.2 |
HIP 36406 |
22.51 |
| 2026-05-18 12:00 |
07:28:02.28 |
+16:18:08.5 |
HIP 36406 |
22.22 |
| 2026-05-19 00:00 |
07:28:03.61 |
+16:18:07.8 |
HIP 36406 |
21.92 |
| 2026-05-19 12:00 |
07:28:04.95 |
+16:18:07.0 |
HIP 36406 |
21.61 |
| 2026-05-20 00:00 |
07:28:06.32 |
+16:18:06.2 |
HIP 36406 |
21.31 |
| 2026-05-20 12:00 |
07:28:07.70 |
+16:18:05.3 |
HIP 36406 |
20.99 |
| 2026-05-21 00:00 |
07:28:09.09 |
+16:18:04.3 |
HIP 36406 |
20.68 |
| 2026-05-21 12:00 |
07:28:10.50 |
+16:18:03.3 |
HIP 36406 |
20.36 |
| 2026-05-22 00:00 |
07:28:11.93 |
+16:18:02.3 |
HIP 36406 |
20.04 |
| 2026-05-22 12:00 |
07:28:13.37 |
+16:18:01.2 |
HIP 36406 |
19.72 |
| 2026-05-23 00:00 |
07:28:14.82 |
+16:18:00.0 |
HIP 36406 |
19.40 |
| 2026-05-23 12:00 |
07:28:16.30 |
+16:17:58.8 |
HIP 36406 |
19.07 |
| 2026-05-24 00:00 |
07:28:17.78 |
+16:17:57.5 |
HIP 36406 |
18.74 |
| 2026-05-24 12:00 |
07:28:19.28 |
+16:17:56.2 |
HIP 36406 |
18.40 |
| 2026-05-25 00:00 |
07:28:20.80 |
+16:17:54.8 |
HIP 36406 |
18.07 |
| 2026-05-25 12:00 |
07:28:22.33 |
+16:17:53.4 |
HIP 36406 |
17.73 |
| 2026-05-26 00:00 |
07:28:23.87 |
+16:17:51.9 |
HIP 36406 |
17.39 |
| 2026-05-26 12:00 |
07:28:25.43 |
+16:17:50.4 |
HIP 36406 |
17.04 |
| 2026-05-27 00:00 |
07:28:27.01 |
+16:17:48.8 |
HIP 36406 |
16.70 |
| 2026-05-27 12:00 |
07:28:28.59 |
+16:17:47.2 |
HIP 36406 |
16.35 |
| 2026-05-28 00:00 |
07:28:30.20 |
+16:17:45.5 |
HIP 36406 |
16.00 |
| 2026-05-28 12:00 |
07:28:31.81 |
+16:17:43.8 |
HIP 36406 |
15.65 |
| 2026-05-29 00:00 |
07:28:33.44 |
+16:17:42.0 |
HIP 36406 |
15.30 |
| 2026-05-29 12:00 |
07:28:35.08 |
+16:17:40.1 |
HIP 36406 |
14.95 |
| 2026-05-30 00:00 |
07:28:36.74 |
+16:17:38.2 |
HIP 36406 |
14.59 |
| 2026-05-30 12:00 |
07:28:38.41 |
+16:17:36.3 |
HIP 36406 |
14.24 |
| 2026-05-31 00:00 |
07:28:40.09 |
+16:17:34.3 |
HIP 36406 |
13.88 |
| 2026-05-31 12:00 |
07:28:41.78 |
+16:17:32.2 |
HIP 36406 |
13.53 |
| 2026-06-01 00:00 |
07:28:43.49 |
+16:17:30.1 |
HIP 36406 |
13.17 |
| 2026-06-01 12:00 |
07:28:45.21 |
+16:17:27.9 |
HIP 36406 |
12.82 |
| 2026-06-02 00:00 |
07:28:46.95 |
+16:17:25.7 |
HIP 36406 |
12.46 |